./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD --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 0bb6ea6333d2c4e133ad252fe2bcbc17b832f383e2bb5defb402851de157204c ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:22:01,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:22:01,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:22:01,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:22:01,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:22:01,942 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:22:01,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:22:01,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:22:01,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:22:01,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:22:01,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:22:01,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:22:01,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:22:01,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:22:01,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:22:01,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:22:01,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:22:01,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:22:01,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:22:01,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:22:01,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:22:01,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:22:01,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:22:01,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:22:02,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:22:02,006 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:22:02,007 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:22:02,008 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:22:02,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:22:02,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:22:02,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:22:02,015 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:22:02,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:22:02,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:22:02,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:22:02,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:22:02,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:22:02,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:22:02,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:22:02,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:22:02,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:22:02,027 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 23:22:02,092 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:22:02,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:22:02,094 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:22:02,101 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:22:02,103 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:22:02,103 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:22:02,104 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:22:02,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:22:02,104 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:22:02,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:22:02,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:22:02,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:22:02,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 23:22:02,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:22:02,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 23:22:02,106 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:22:02,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:22:02,107 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:22:02,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 23:22:02,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:22:02,108 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:22:02,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:22:02,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:22:02,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:22:02,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:22:02,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 23:22:02,110 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:22:02,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:22:02,110 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 23:22:02,111 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 23:22:02,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 23:22:02,111 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:22:02,111 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_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bb6ea6333d2c4e133ad252fe2bcbc17b832f383e2bb5defb402851de157204c [2021-10-28 23:22:02,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:22:02,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:22:02,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:22:02,482 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:22:02,483 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:22:02,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound50.c [2021-10-28 23:22:02,599 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/data/036bc6e1d/b06c6f03a91244a0ab369252b5c028b7/FLAG4209b2dbd [2021-10-28 23:22:03,120 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:22:03,121 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound50.c [2021-10-28 23:22:03,129 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/data/036bc6e1d/b06c6f03a91244a0ab369252b5c028b7/FLAG4209b2dbd [2021-10-28 23:22:03,500 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/data/036bc6e1d/b06c6f03a91244a0ab369252b5c028b7 [2021-10-28 23:22:03,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:22:03,505 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:22:03,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:22:03,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:22:03,512 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:22:03,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:22:03" (1/1) ... [2021-10-28 23:22:03,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e21ecb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:22:03, skipping insertion in model container [2021-10-28 23:22:03,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:22:03" (1/1) ... [2021-10-28 23:22:03,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:22:03,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:22:03,730 WARN L228 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_0fcc0947-fd41-412d-a928-82b7809fe2c2/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound50.c[597,610] [2021-10-28 23:22:03,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:22:03,762 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:22:03,777 WARN L228 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_0fcc0947-fd41-412d-a928-82b7809fe2c2/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound50.c[597,610] [2021-10-28 23:22:03,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:22:03,803 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:22:03,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:22:03 WrapperNode [2021-10-28 23:22:03,804 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:22:03,805 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:22:03,806 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:22:03,806 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:22:03,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:22:03" (1/1) ... [2021-10-28 23:22:03,823 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:22:03" (1/1) ... [2021-10-28 23:22:03,848 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:22:03,849 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:22:03,849 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:22:03,849 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:22:03,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:22:03" (1/1) ... [2021-10-28 23:22:03,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:22:03" (1/1) ... [2021-10-28 23:22:03,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:22:03" (1/1) ... [2021-10-28 23:22:03,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:22:03" (1/1) ... [2021-10-28 23:22:03,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:22:03" (1/1) ... [2021-10-28 23:22:03,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:22:03" (1/1) ... [2021-10-28 23:22:03,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:22:03" (1/1) ... [2021-10-28 23:22:03,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:22:03,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:22:03,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:22:03,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:22:03,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:22:03" (1/1) ... [2021-10-28 23:22:03,888 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:22:03,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:03,929 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:22:03,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:22:03,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:22:03,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:22:03,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:22:03,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:22:04,227 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:22:04,227 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-28 23:22:04,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:22:04 BoogieIcfgContainer [2021-10-28 23:22:04,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:22:04,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:22:04,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:22:04,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:22:04,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:22:03" (1/3) ... [2021-10-28 23:22:04,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80c8170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:22:04, skipping insertion in model container [2021-10-28 23:22:04,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:22:03" (2/3) ... [2021-10-28 23:22:04,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80c8170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:22:04, skipping insertion in model container [2021-10-28 23:22:04,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:22:04" (3/3) ... [2021-10-28 23:22:04,241 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound50.c [2021-10-28 23:22:04,248 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:22:04,248 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-28 23:22:04,305 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:22:04,313 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 [2021-10-28 23:22:04,320 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-28 23:22:04,340 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:04,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-28 23:22:04,347 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:04,348 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-28 23:22:04,348 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:04,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:04,355 INFO L85 PathProgramCache]: Analyzing trace with hash 890461031, now seen corresponding path program 1 times [2021-10-28 23:22:04,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:04,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057043467] [2021-10-28 23:22:04,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:04,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:22:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:04,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:04,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057043467] [2021-10-28 23:22:04,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057043467] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:22:04,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:22:04,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 23:22:04,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867162096] [2021-10-28 23:22:04,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 23:22:04,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:04,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 23:22:04,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:22:04,678 INFO L87 Difference]: Start difference. First operand has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:04,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:04,697 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2021-10-28 23:22:04,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 23:22:04,699 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-10-28 23:22:04,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:04,709 INFO L225 Difference]: With dead ends: 34 [2021-10-28 23:22:04,709 INFO L226 Difference]: Without dead ends: 14 [2021-10-28 23:22:04,716 INFO L786 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 [2021-10-28 23:22:04,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-28 23:22:04,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-28 23:22:04,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:04,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-10-28 23:22:04,756 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2021-10-28 23:22:04,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:04,758 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-28 23:22:04,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:04,759 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-10-28 23:22:04,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-28 23:22:04,760 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:04,760 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-28 23:22:04,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:22:04,761 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:04,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:04,767 INFO L85 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-10-28 23:22:04,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:04,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650199882] [2021-10-28 23:22:04,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:04,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:04,819 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:04,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361566982] [2021-10-28 23:22:04,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:04,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:04,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:04,827 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:04,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:22:04,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:22:04,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 23:22:04,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:05,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:05,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:05,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650199882] [2021-10-28 23:22:05,223 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:05,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361566982] [2021-10-28 23:22:05,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361566982] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:22:05,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:22:05,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:22:05,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940270727] [2021-10-28 23:22:05,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:22:05,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:05,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:22:05,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:22:05,236 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:05,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:05,330 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-10-28 23:22:05,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:22:05,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-10-28 23:22:05,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:05,333 INFO L225 Difference]: With dead ends: 30 [2021-10-28 23:22:05,333 INFO L226 Difference]: Without dead ends: 23 [2021-10-28 23:22:05,334 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:22:05,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-28 23:22:05,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2021-10-28 23:22:05,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.25) 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) [2021-10-28 23:22:05,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-10-28 23:22:05,340 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 6 [2021-10-28 23:22:05,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:05,341 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-10-28 23:22:05,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:05,342 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-10-28 23:22:05,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 23:22:05,343 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:05,343 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:05,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:05,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-28 23:22:05,557 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:05,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:05,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1545533000, now seen corresponding path program 1 times [2021-10-28 23:22:05,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:05,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357876068] [2021-10-28 23:22:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:05,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:05,590 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:05,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313359944] [2021-10-28 23:22:05,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:05,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:05,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:05,600 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:05,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:22:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:22:05,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 23:22:05,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:06,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:06,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357876068] [2021-10-28 23:22:06,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:06,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313359944] [2021-10-28 23:22:06,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313359944] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:06,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:06,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 23:22:06,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260492043] [2021-10-28 23:22:06,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:22:06,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:06,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:22:06,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:22:06,143 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:06,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:06,301 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-10-28 23:22:06,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:22:06,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-10-28 23:22:06,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:06,307 INFO L225 Difference]: With dead ends: 35 [2021-10-28 23:22:06,307 INFO L226 Difference]: Without dead ends: 33 [2021-10-28 23:22:06,308 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:22:06,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-28 23:22:06,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-10-28 23:22:06,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 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) [2021-10-28 23:22:06,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-10-28 23:22:06,322 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-10-28 23:22:06,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:06,323 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-10-28 23:22:06,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:06,324 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-10-28 23:22:06,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 23:22:06,326 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:06,326 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:06,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-28 23:22:06,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:06,529 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:06,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:06,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1602791302, now seen corresponding path program 1 times [2021-10-28 23:22:06,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:06,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009657838] [2021-10-28 23:22:06,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:06,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:06,544 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:06,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742737321] [2021-10-28 23:22:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:06,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:06,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:06,546 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:06,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:22:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:22:06,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:22:06,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:06,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:06,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009657838] [2021-10-28 23:22:06,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:06,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742737321] [2021-10-28 23:22:06,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742737321] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:06,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:06,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 23:22:06,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486262248] [2021-10-28 23:22:06,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:22:06,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:06,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:22:06,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:22:06,840 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:06,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:06,982 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-10-28 23:22:06,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:22:06,983 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-10-28 23:22:06,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:06,984 INFO L225 Difference]: With dead ends: 39 [2021-10-28 23:22:06,984 INFO L226 Difference]: Without dead ends: 33 [2021-10-28 23:22:06,985 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:22:06,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-28 23:22:06,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-10-28 23:22:06,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 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) [2021-10-28 23:22:06,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-10-28 23:22:06,991 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 12 [2021-10-28 23:22:06,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:06,991 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-10-28 23:22:06,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:06,992 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-10-28 23:22:06,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:22:06,993 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:06,993 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:07,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:07,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:07,194 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:07,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:07,195 INFO L85 PathProgramCache]: Analyzing trace with hash -666919436, now seen corresponding path program 1 times [2021-10-28 23:22:07,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:07,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030041961] [2021-10-28 23:22:07,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:07,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:07,225 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:07,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518036293] [2021-10-28 23:22:07,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:07,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:07,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:07,235 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:07,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:22:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:22:07,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 23:22:07,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:07,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:07,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030041961] [2021-10-28 23:22:07,402 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:07,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518036293] [2021-10-28 23:22:07,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518036293] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:07,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:07,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-28 23:22:07,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173022186] [2021-10-28 23:22:07,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:22:07,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:07,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:22:07,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:22:07,405 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.6) 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) [2021-10-28 23:22:07,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:07,453 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-10-28 23:22:07,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:22:07,455 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) 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 [2021-10-28 23:22:07,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:07,456 INFO L225 Difference]: With dead ends: 32 [2021-10-28 23:22:07,456 INFO L226 Difference]: Without dead ends: 28 [2021-10-28 23:22:07,456 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:22:07,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-28 23:22:07,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-28 23:22:07,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 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) [2021-10-28 23:22:07,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-10-28 23:22:07,462 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 13 [2021-10-28 23:22:07,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:07,462 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-10-28 23:22:07,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) 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) [2021-10-28 23:22:07,462 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-10-28 23:22:07,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 23:22:07,463 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:07,463 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:07,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:07,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:07,664 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:07,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:07,665 INFO L85 PathProgramCache]: Analyzing trace with hash -919296115, now seen corresponding path program 1 times [2021-10-28 23:22:07,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:07,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670731851] [2021-10-28 23:22:07,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:07,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:07,680 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:07,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502392543] [2021-10-28 23:22:07,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:07,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:07,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:07,682 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:07,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:22:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:22:07,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 23:22:07,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:08,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:08,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670731851] [2021-10-28 23:22:08,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:08,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502392543] [2021-10-28 23:22:08,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502392543] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:08,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:08,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-28 23:22:08,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30126248] [2021-10-28 23:22:08,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:22:08,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:08,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:22:08,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:22:08,302 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) [2021-10-28 23:22:08,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:08,474 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-10-28 23:22:08,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:22:08,475 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-28 23:22:08,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:08,476 INFO L225 Difference]: With dead ends: 38 [2021-10-28 23:22:08,476 INFO L226 Difference]: Without dead ends: 34 [2021-10-28 23:22:08,476 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:22:08,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-28 23:22:08,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2021-10-28 23:22:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 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) [2021-10-28 23:22:08,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-10-28 23:22:08,493 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2021-10-28 23:22:08,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:08,494 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-10-28 23:22:08,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) [2021-10-28 23:22:08,494 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-10-28 23:22:08,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 23:22:08,495 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:08,495 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-28 23:22:08,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:08,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-28 23:22:08,696 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:08,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:08,697 INFO L85 PathProgramCache]: Analyzing trace with hash -443375322, now seen corresponding path program 2 times [2021-10-28 23:22:08,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:08,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040172228] [2021-10-28 23:22:08,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:08,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:08,719 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:08,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117932028] [2021-10-28 23:22:08,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:22:08,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:08,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:08,739 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:08,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 23:22:08,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:22:08,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:08,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-28 23:22:08,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:09,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:09,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040172228] [2021-10-28 23:22:09,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:09,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117932028] [2021-10-28 23:22:09,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117932028] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:09,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:09,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-28 23:22:09,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633586857] [2021-10-28 23:22:09,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:22:09,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:09,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:22:09,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:22:09,289 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2021-10-28 23:22:09,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:09,530 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-10-28 23:22:09,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:22:09,531 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-28 23:22:09,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:09,532 INFO L225 Difference]: With dead ends: 46 [2021-10-28 23:22:09,532 INFO L226 Difference]: Without dead ends: 44 [2021-10-28 23:22:09,533 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:22:09,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-28 23:22:09,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2021-10-28 23:22:09,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:09,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-10-28 23:22:09,541 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2021-10-28 23:22:09,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:09,541 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-10-28 23:22:09,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2021-10-28 23:22:09,542 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-10-28 23:22:09,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 23:22:09,543 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:09,547 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:09,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:09,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:09,749 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:09,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:09,750 INFO L85 PathProgramCache]: Analyzing trace with hash -500633624, now seen corresponding path program 1 times [2021-10-28 23:22:09,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:09,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635381847] [2021-10-28 23:22:09,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:09,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:09,762 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:09,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842774638] [2021-10-28 23:22:09,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:09,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:09,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:09,765 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:09,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 23:22:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:22:09,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 23:22:09,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:10,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:10,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635381847] [2021-10-28 23:22:10,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:10,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842774638] [2021-10-28 23:22:10,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842774638] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:10,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:10,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-28 23:22:10,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793059491] [2021-10-28 23:22:10,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:22:10,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:10,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:22:10,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:22:10,802 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2021-10-28 23:22:11,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:11,696 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-10-28 23:22:11,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:22:11,696 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-28 23:22:11,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:11,697 INFO L225 Difference]: With dead ends: 60 [2021-10-28 23:22:11,698 INFO L226 Difference]: Without dead ends: 48 [2021-10-28 23:22:11,698 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:22:11,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-28 23:22:11,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-10-28 23:22:11,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 39 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) [2021-10-28 23:22:11,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-10-28 23:22:11,707 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 18 [2021-10-28 23:22:11,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:11,707 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-10-28 23:22:11,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2021-10-28 23:22:11,708 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-10-28 23:22:11,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 23:22:11,709 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:11,709 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:11,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:11,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:11,931 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:11,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:11,931 INFO L85 PathProgramCache]: Analyzing trace with hash -701540760, now seen corresponding path program 2 times [2021-10-28 23:22:11,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:11,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077770933] [2021-10-28 23:22:11,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:11,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:11,946 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:11,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990106042] [2021-10-28 23:22:11,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:22:11,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:11,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:11,948 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:11,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 23:22:12,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:22:12,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:12,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 23:22:12,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:12,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:12,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077770933] [2021-10-28 23:22:12,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:12,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990106042] [2021-10-28 23:22:12,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990106042] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:12,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:12,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 23:22:12,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498491947] [2021-10-28 23:22:12,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:22:12,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:12,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:22:12,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:22:12,462 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-10-28 23:22:12,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:12,713 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-10-28 23:22:12,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:22:12,714 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-28 23:22:12,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:12,716 INFO L225 Difference]: With dead ends: 57 [2021-10-28 23:22:12,716 INFO L226 Difference]: Without dead ends: 55 [2021-10-28 23:22:12,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:22:12,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-28 23:22:12,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2021-10-28 23:22:12,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 39 states have (on average 1.2307692307692308) 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) [2021-10-28 23:22:12,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-10-28 23:22:12,725 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 18 [2021-10-28 23:22:12,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:12,725 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-10-28 23:22:12,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-10-28 23:22:12,726 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-10-28 23:22:12,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 23:22:12,727 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:12,727 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-28 23:22:12,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:12,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-28 23:22:12,944 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:12,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:12,945 INFO L85 PathProgramCache]: Analyzing trace with hash -758799062, now seen corresponding path program 2 times [2021-10-28 23:22:12,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:12,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959241327] [2021-10-28 23:22:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:12,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:12,969 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:12,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684323606] [2021-10-28 23:22:12,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:22:12,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:12,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:12,977 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:12,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 23:22:13,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:22:13,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:13,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 23:22:13,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:13,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:13,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959241327] [2021-10-28 23:22:13,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:13,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684323606] [2021-10-28 23:22:13,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684323606] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:13,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:13,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 23:22:13,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340708418] [2021-10-28 23:22:13,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:22:13,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:13,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:22:13,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:22:13,601 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 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) [2021-10-28 23:22:14,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:14,003 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-10-28 23:22:14,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:22:14,003 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-28 23:22:14,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:14,004 INFO L225 Difference]: With dead ends: 60 [2021-10-28 23:22:14,004 INFO L226 Difference]: Without dead ends: 54 [2021-10-28 23:22:14,005 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:22:14,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-28 23:22:14,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2021-10-28 23:22:14,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 45 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) [2021-10-28 23:22:14,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-10-28 23:22:14,013 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 18 [2021-10-28 23:22:14,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:14,019 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-10-28 23:22:14,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 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) [2021-10-28 23:22:14,022 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-10-28 23:22:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 23:22:14,024 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:14,024 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:14,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:14,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:14,239 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:14,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:14,239 INFO L85 PathProgramCache]: Analyzing trace with hash -859769786, now seen corresponding path program 2 times [2021-10-28 23:22:14,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:14,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188782308] [2021-10-28 23:22:14,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:14,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:14,263 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:14,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2142117724] [2021-10-28 23:22:14,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:22:14,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:14,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:14,267 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:14,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 23:22:14,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:22:14,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:14,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:22:14,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:14,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:14,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188782308] [2021-10-28 23:22:14,588 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:14,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142117724] [2021-10-28 23:22:14,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142117724] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:14,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:14,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-28 23:22:14,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167406347] [2021-10-28 23:22:14,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:22:14,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:14,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:22:14,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:22:14,591 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:14,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:14,630 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-10-28 23:22:14,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:22:14,631 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 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 [2021-10-28 23:22:14,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:14,632 INFO L225 Difference]: With dead ends: 50 [2021-10-28 23:22:14,632 INFO L226 Difference]: Without dead ends: 46 [2021-10-28 23:22:14,633 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:22:14,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-28 23:22:14,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-10-28 23:22:14,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:14,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-10-28 23:22:14,647 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 19 [2021-10-28 23:22:14,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:14,648 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-10-28 23:22:14,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:14,649 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-10-28 23:22:14,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 23:22:14,650 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:14,650 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:14,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:14,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-28 23:22:14,876 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:14,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:14,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1564888737, now seen corresponding path program 2 times [2021-10-28 23:22:14,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:14,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786886172] [2021-10-28 23:22:14,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:14,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:14,905 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:14,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231348951] [2021-10-28 23:22:14,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:22:14,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:14,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:14,941 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:14,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 23:22:15,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:22:15,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:15,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 23:22:15,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:15,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:15,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786886172] [2021-10-28 23:22:15,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:15,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231348951] [2021-10-28 23:22:15,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231348951] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:15,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:15,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-28 23:22:15,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524687392] [2021-10-28 23:22:15,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:22:15,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:15,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:22:15,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:22:15,833 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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) [2021-10-28 23:22:16,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:16,231 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2021-10-28 23:22:16,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:22:16,232 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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) Word has length 21 [2021-10-28 23:22:16,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:16,233 INFO L225 Difference]: With dead ends: 61 [2021-10-28 23:22:16,233 INFO L226 Difference]: Without dead ends: 57 [2021-10-28 23:22:16,233 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:22:16,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-28 23:22:16,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2021-10-28 23:22:16,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:16,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-10-28 23:22:16,244 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 21 [2021-10-28 23:22:16,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:16,245 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-10-28 23:22:16,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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) [2021-10-28 23:22:16,245 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-10-28 23:22:16,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 23:22:16,247 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:16,247 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:16,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:16,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 23:22:16,454 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:16,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:16,455 INFO L85 PathProgramCache]: Analyzing trace with hash -285025059, now seen corresponding path program 1 times [2021-10-28 23:22:16,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:16,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114721065] [2021-10-28 23:22:16,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:16,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:16,476 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:16,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618267921] [2021-10-28 23:22:16,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:16,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:16,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:16,486 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:16,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 23:22:16,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:22:16,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 23:22:16,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:16,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:16,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114721065] [2021-10-28 23:22:16,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:16,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618267921] [2021-10-28 23:22:16,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618267921] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:16,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:16,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 23:22:16,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49581119] [2021-10-28 23:22:16,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:22:16,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:16,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:22:16,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:22:16,997 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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) [2021-10-28 23:22:17,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:17,350 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-10-28 23:22:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:22:17,351 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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) Word has length 21 [2021-10-28 23:22:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:17,352 INFO L225 Difference]: With dead ends: 53 [2021-10-28 23:22:17,352 INFO L226 Difference]: Without dead ends: 49 [2021-10-28 23:22:17,352 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:22:17,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-28 23:22:17,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2021-10-28 23:22:17,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.175) internal successors, (47), 41 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) [2021-10-28 23:22:17,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-10-28 23:22:17,359 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 21 [2021-10-28 23:22:17,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:17,368 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-10-28 23:22:17,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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) [2021-10-28 23:22:17,369 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-10-28 23:22:17,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 23:22:17,370 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:17,370 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1] [2021-10-28 23:22:17,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:17,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:17,571 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:17,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:17,571 INFO L85 PathProgramCache]: Analyzing trace with hash -429625836, now seen corresponding path program 3 times [2021-10-28 23:22:17,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:17,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108541205] [2021-10-28 23:22:17,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:17,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:17,592 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:17,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229392320] [2021-10-28 23:22:17,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:22:17,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:17,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:17,598 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:17,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 23:22:18,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 23:22:18,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:18,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 23:22:18,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 23:22:18,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:18,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108541205] [2021-10-28 23:22:18,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:18,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229392320] [2021-10-28 23:22:18,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229392320] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:18,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:18,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 23:22:18,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224971618] [2021-10-28 23:22:18,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:22:18,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:18,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:22:18,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:22:18,837 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-10-28 23:22:19,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:19,152 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-10-28 23:22:19,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:22:19,153 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) Word has length 24 [2021-10-28 23:22:19,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:19,153 INFO L225 Difference]: With dead ends: 64 [2021-10-28 23:22:19,154 INFO L226 Difference]: Without dead ends: 62 [2021-10-28 23:22:19,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:22:19,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-28 23:22:19,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2021-10-28 23:22:19,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 45 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) [2021-10-28 23:22:19,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-10-28 23:22:19,166 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 24 [2021-10-28 23:22:19,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:19,167 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-10-28 23:22:19,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-10-28 23:22:19,167 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-10-28 23:22:19,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 23:22:19,172 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:19,172 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2021-10-28 23:22:19,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:19,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 23:22:19,373 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:19,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:19,374 INFO L85 PathProgramCache]: Analyzing trace with hash -486884138, now seen corresponding path program 3 times [2021-10-28 23:22:19,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:19,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468779358] [2021-10-28 23:22:19,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:19,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:19,382 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:19,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971943460] [2021-10-28 23:22:19,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:22:19,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:19,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:19,386 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:19,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 23:22:19,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 23:22:19,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:19,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 23:22:19,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:19,799 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 23:22:19,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:19,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468779358] [2021-10-28 23:22:19,800 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:19,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971943460] [2021-10-28 23:22:19,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971943460] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:19,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:19,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 23:22:19,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630334359] [2021-10-28 23:22:19,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:22:19,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:19,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:22:19,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:22:19,802 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-10-28 23:22:19,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:19,885 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-10-28 23:22:19,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:22:19,886 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) Word has length 24 [2021-10-28 23:22:19,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:19,886 INFO L225 Difference]: With dead ends: 47 [2021-10-28 23:22:19,886 INFO L226 Difference]: Without dead ends: 45 [2021-10-28 23:22:19,887 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:22:19,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-28 23:22:19,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-10-28 23:22:19,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 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) [2021-10-28 23:22:19,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-10-28 23:22:19,907 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 24 [2021-10-28 23:22:19,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:19,907 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-10-28 23:22:19,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-10-28 23:22:19,908 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-10-28 23:22:19,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-28 23:22:19,909 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:19,909 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:19,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:20,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:20,125 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:20,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:20,125 INFO L85 PathProgramCache]: Analyzing trace with hash -433535720, now seen corresponding path program 3 times [2021-10-28 23:22:20,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:20,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717458855] [2021-10-28 23:22:20,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:20,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:20,150 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:20,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046325674] [2021-10-28 23:22:20,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:22:20,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:20,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:20,152 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:20,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 23:22:20,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 23:22:20,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:20,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:22:20,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:20,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:20,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717458855] [2021-10-28 23:22:20,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:20,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046325674] [2021-10-28 23:22:20,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046325674] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:20,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:20,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 23:22:20,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906051216] [2021-10-28 23:22:20,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:22:20,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:20,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:22:20,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:22:20,552 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-10-28 23:22:20,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:20,601 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-10-28 23:22:20,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:22:20,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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 25 [2021-10-28 23:22:20,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:20,602 INFO L225 Difference]: With dead ends: 48 [2021-10-28 23:22:20,602 INFO L226 Difference]: Without dead ends: 44 [2021-10-28 23:22:20,603 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:22:20,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-28 23:22:20,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-10-28 23:22:20,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 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) [2021-10-28 23:22:20,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-10-28 23:22:20,612 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 25 [2021-10-28 23:22:20,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:20,612 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-10-28 23:22:20,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-10-28 23:22:20,613 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-10-28 23:22:20,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 23:22:20,613 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:20,614 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:20,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:20,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 23:22:20,840 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:20,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:20,840 INFO L85 PathProgramCache]: Analyzing trace with hash 24155569, now seen corresponding path program 3 times [2021-10-28 23:22:20,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:20,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240756201] [2021-10-28 23:22:20,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:20,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:20,853 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:20,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965087207] [2021-10-28 23:22:20,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:22:20,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:20,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:20,855 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:20,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 23:22:21,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 23:22:21,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:21,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 23:22:21,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-28 23:22:22,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:22,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240756201] [2021-10-28 23:22:22,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:22,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965087207] [2021-10-28 23:22:22,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965087207] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:22:22,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:22:22,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 23:22:22,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658604670] [2021-10-28 23:22:22,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:22:22,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:22,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:22:22,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:22:22,297 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2021-10-28 23:22:22,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:22,552 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2021-10-28 23:22:22,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:22:22,552 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-28 23:22:22,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:22,553 INFO L225 Difference]: With dead ends: 84 [2021-10-28 23:22:22,553 INFO L226 Difference]: Without dead ends: 80 [2021-10-28 23:22:22,554 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:22:22,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-28 23:22:22,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2021-10-28 23:22:22,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 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) [2021-10-28 23:22:22,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-10-28 23:22:22,562 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 27 [2021-10-28 23:22:22,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:22,563 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-10-28 23:22:22,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2021-10-28 23:22:22,563 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-10-28 23:22:22,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 23:22:22,564 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:22,564 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:22,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:22,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 23:22:22,785 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:22,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:22,786 INFO L85 PathProgramCache]: Analyzing trace with hash -655902801, now seen corresponding path program 2 times [2021-10-28 23:22:22,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:22,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422426395] [2021-10-28 23:22:22,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:22,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:22,800 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:22,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431403827] [2021-10-28 23:22:22,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:22:22,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:22,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:22,802 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:22,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 23:22:23,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:22:23,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:23,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:22:23,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:23,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:23,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422426395] [2021-10-28 23:22:23,880 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:23,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431403827] [2021-10-28 23:22:23,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431403827] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:23,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:23,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-28 23:22:23,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014769346] [2021-10-28 23:22:23,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:22:23,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:23,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:22:23,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:22:23,883 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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) [2021-10-28 23:22:24,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:24,291 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2021-10-28 23:22:24,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:22:24,295 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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) Word has length 27 [2021-10-28 23:22:24,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:24,296 INFO L225 Difference]: With dead ends: 70 [2021-10-28 23:22:24,296 INFO L226 Difference]: Without dead ends: 66 [2021-10-28 23:22:24,296 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:22:24,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-28 23:22:24,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2021-10-28 23:22:24,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 57 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:24,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-10-28 23:22:24,314 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 27 [2021-10-28 23:22:24,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:24,314 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-10-28 23:22:24,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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) [2021-10-28 23:22:24,315 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-10-28 23:22:24,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 23:22:24,315 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:24,316 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:24,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:24,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 23:22:24,522 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:24,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:24,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1078604627, now seen corresponding path program 3 times [2021-10-28 23:22:24,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:24,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490744252] [2021-10-28 23:22:24,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:24,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:24,533 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:24,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1604859113] [2021-10-28 23:22:24,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:22:24,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:24,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:24,536 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:24,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 23:22:25,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 23:22:25,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:25,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 23:22:25,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-28 23:22:25,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:25,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490744252] [2021-10-28 23:22:25,486 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:25,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604859113] [2021-10-28 23:22:25,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604859113] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:22:25,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:22:25,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 23:22:25,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201413685] [2021-10-28 23:22:25,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:22:25,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:25,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:22:25,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:22:25,489 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:25,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:25,662 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2021-10-28 23:22:25,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:22:25,663 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 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 [2021-10-28 23:22:25,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:25,664 INFO L225 Difference]: With dead ends: 62 [2021-10-28 23:22:25,664 INFO L226 Difference]: Without dead ends: 58 [2021-10-28 23:22:25,664 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:22:25,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-28 23:22:25,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 44. [2021-10-28 23:22:25,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:25,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2021-10-28 23:22:25,694 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 27 [2021-10-28 23:22:25,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:25,695 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2021-10-28 23:22:25,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:25,695 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2021-10-28 23:22:25,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 23:22:25,695 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:25,696 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:25,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:25,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:25,911 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:25,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:25,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1957613462, now seen corresponding path program 4 times [2021-10-28 23:22:25,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:25,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988293324] [2021-10-28 23:22:25,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:25,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:25,929 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:25,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455943513] [2021-10-28 23:22:25,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:22:25,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:25,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:25,931 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:25,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 23:22:26,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:22:26,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:26,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:22:26,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:26,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:26,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988293324] [2021-10-28 23:22:26,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:26,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455943513] [2021-10-28 23:22:26,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455943513] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:26,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:26,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 23:22:26,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563980270] [2021-10-28 23:22:26,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:22:26,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:26,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:22:26,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:22:26,363 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-10-28 23:22:26,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:26,419 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-10-28 23:22:26,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:22:26,420 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 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 [2021-10-28 23:22:26,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:26,420 INFO L225 Difference]: With dead ends: 54 [2021-10-28 23:22:26,421 INFO L226 Difference]: Without dead ends: 50 [2021-10-28 23:22:26,421 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:22:26,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-28 23:22:26,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-10-28 23:22:26,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 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) [2021-10-28 23:22:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-10-28 23:22:26,429 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 31 [2021-10-28 23:22:26,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:26,429 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-10-28 23:22:26,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:26,429 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-10-28 23:22:26,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 23:22:26,430 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:26,430 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:26,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:26,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:26,651 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:26,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:26,652 INFO L85 PathProgramCache]: Analyzing trace with hash -553888196, now seen corresponding path program 5 times [2021-10-28 23:22:26,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:26,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307429841] [2021-10-28 23:22:26,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:26,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:26,659 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:26,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338116011] [2021-10-28 23:22:26,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:22:26,659 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:26,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:26,660 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:26,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 23:22:26,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 23:22:26,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:26,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 23:22:26,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:27,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:27,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307429841] [2021-10-28 23:22:27,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:27,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338116011] [2021-10-28 23:22:27,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338116011] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:27,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:27,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 23:22:27,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772296216] [2021-10-28 23:22:27,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:22:27,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:27,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:22:27,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:22:27,149 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-10-28 23:22:27,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:27,231 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2021-10-28 23:22:27,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 23:22:27,232 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 37 [2021-10-28 23:22:27,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:27,232 INFO L225 Difference]: With dead ends: 60 [2021-10-28 23:22:27,233 INFO L226 Difference]: Without dead ends: 56 [2021-10-28 23:22:27,233 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:22:27,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-28 23:22:27,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-10-28 23:22:27,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:27,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-10-28 23:22:27,243 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 37 [2021-10-28 23:22:27,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:27,244 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-10-28 23:22:27,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-10-28 23:22:27,244 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-10-28 23:22:27,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-28 23:22:27,245 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:27,245 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:27,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:27,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-28 23:22:27,464 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:27,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:27,465 INFO L85 PathProgramCache]: Analyzing trace with hash 835999374, now seen corresponding path program 6 times [2021-10-28 23:22:27,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:27,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034503834] [2021-10-28 23:22:27,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:27,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:27,475 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:27,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548261873] [2021-10-28 23:22:27,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:22:27,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:27,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:27,478 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:27,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 23:22:28,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-28 23:22:28,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:28,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 23:22:28,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:28,221 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:28,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:28,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034503834] [2021-10-28 23:22:28,221 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:28,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548261873] [2021-10-28 23:22:28,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548261873] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:28,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:28,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-28 23:22:28,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621012231] [2021-10-28 23:22:28,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:22:28,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:28,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:22:28,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:22:28,223 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:28,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:28,317 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2021-10-28 23:22:28,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:22:28,318 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 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 [2021-10-28 23:22:28,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:28,319 INFO L225 Difference]: With dead ends: 66 [2021-10-28 23:22:28,319 INFO L226 Difference]: Without dead ends: 62 [2021-10-28 23:22:28,319 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:22:28,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-28 23:22:28,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-28 23:22:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 61 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) [2021-10-28 23:22:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-10-28 23:22:28,328 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 43 [2021-10-28 23:22:28,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:28,329 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-10-28 23:22:28,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:28,329 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-10-28 23:22:28,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-28 23:22:28,330 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:28,330 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:28,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:28,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:28,537 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:28,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:28,538 INFO L85 PathProgramCache]: Analyzing trace with hash -194293408, now seen corresponding path program 7 times [2021-10-28 23:22:28,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:28,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523452919] [2021-10-28 23:22:28,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:28,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:28,560 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:28,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478437150] [2021-10-28 23:22:28,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:22:28,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:28,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:28,562 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:28,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 23:22:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:22:28,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:22:28,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:29,104 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:29,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:29,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523452919] [2021-10-28 23:22:29,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:29,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478437150] [2021-10-28 23:22:29,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478437150] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:29,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:29,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 23:22:29,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6794795] [2021-10-28 23:22:29,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 23:22:29,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:29,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 23:22:29,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:22:29,107 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:29,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:29,289 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-10-28 23:22:29,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 23:22:29,290 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-10-28 23:22:29,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:29,291 INFO L225 Difference]: With dead ends: 72 [2021-10-28 23:22:29,291 INFO L226 Difference]: Without dead ends: 68 [2021-10-28 23:22:29,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:22:29,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-28 23:22:29,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-10-28 23:22:29,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 67 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) [2021-10-28 23:22:29,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2021-10-28 23:22:29,302 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 49 [2021-10-28 23:22:29,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:29,302 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2021-10-28 23:22:29,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:29,303 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2021-10-28 23:22:29,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 23:22:29,307 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:29,307 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:29,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:29,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:29,508 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:29,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:29,509 INFO L85 PathProgramCache]: Analyzing trace with hash 691758770, now seen corresponding path program 8 times [2021-10-28 23:22:29,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:29,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410078763] [2021-10-28 23:22:29,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:29,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:29,519 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:29,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735815371] [2021-10-28 23:22:29,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:22:29,519 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:29,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:29,521 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:29,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 23:22:29,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:22:29,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:29,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 23:22:29,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:30,127 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:30,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:30,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410078763] [2021-10-28 23:22:30,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:30,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735815371] [2021-10-28 23:22:30,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735815371] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:30,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:30,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-28 23:22:30,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068207006] [2021-10-28 23:22:30,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:22:30,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:30,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:22:30,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:22:30,131 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:30,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:30,255 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2021-10-28 23:22:30,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 23:22:30,255 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-10-28 23:22:30,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:30,256 INFO L225 Difference]: With dead ends: 78 [2021-10-28 23:22:30,256 INFO L226 Difference]: Without dead ends: 74 [2021-10-28 23:22:30,257 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:22:30,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-28 23:22:30,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-10-28 23:22:30,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 73 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:30,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-10-28 23:22:30,268 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 55 [2021-10-28 23:22:30,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:30,269 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-10-28 23:22:30,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:30,269 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-10-28 23:22:30,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 23:22:30,270 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:30,270 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:30,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:30,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 23:22:30,477 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:30,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:30,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1453766276, now seen corresponding path program 9 times [2021-10-28 23:22:30,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:30,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239021667] [2021-10-28 23:22:30,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:30,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:30,492 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:30,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717795558] [2021-10-28 23:22:30,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:22:30,493 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:30,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:30,494 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:30,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 23:22:30,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-28 23:22:30,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:30,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 23:22:30,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:31,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:31,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239021667] [2021-10-28 23:22:31,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:31,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717795558] [2021-10-28 23:22:31,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717795558] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:31,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:31,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-28 23:22:31,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584321844] [2021-10-28 23:22:31,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 23:22:31,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:31,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:22:31,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:22:31,115 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 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) [2021-10-28 23:22:31,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:31,246 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2021-10-28 23:22:31,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 23:22:31,246 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 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 61 [2021-10-28 23:22:31,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:31,247 INFO L225 Difference]: With dead ends: 84 [2021-10-28 23:22:31,248 INFO L226 Difference]: Without dead ends: 80 [2021-10-28 23:22:31,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:22:31,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-28 23:22:31,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-10-28 23:22:31,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 79 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:31,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-10-28 23:22:31,258 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 61 [2021-10-28 23:22:31,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:31,258 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-10-28 23:22:31,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 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) [2021-10-28 23:22:31,259 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-10-28 23:22:31,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-28 23:22:31,259 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:31,260 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:31,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-10-28 23:22:31,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 23:22:31,464 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:31,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:31,464 INFO L85 PathProgramCache]: Analyzing trace with hash -118005546, now seen corresponding path program 10 times [2021-10-28 23:22:31,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:31,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687077721] [2021-10-28 23:22:31,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:31,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:31,474 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:31,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249136745] [2021-10-28 23:22:31,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:22:31,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:31,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:31,476 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:31,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 23:22:31,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:22:31,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:31,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 23:22:31,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:32,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:32,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687077721] [2021-10-28 23:22:32,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:32,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249136745] [2021-10-28 23:22:32,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249136745] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:32,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:32,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-28 23:22:32,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500035005] [2021-10-28 23:22:32,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 23:22:32,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:32,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 23:22:32,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:22:32,318 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:32,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:32,465 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2021-10-28 23:22:32,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 23:22:32,465 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 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 [2021-10-28 23:22:32,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:32,466 INFO L225 Difference]: With dead ends: 90 [2021-10-28 23:22:32,466 INFO L226 Difference]: Without dead ends: 86 [2021-10-28 23:22:32,467 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-10-28 23:22:32,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-28 23:22:32,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-10-28 23:22:32,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1529411764705881) internal successors, (98), 85 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) [2021-10-28 23:22:32,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2021-10-28 23:22:32,489 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 67 [2021-10-28 23:22:32,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:32,490 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2021-10-28 23:22:32,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:32,499 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2021-10-28 23:22:32,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-28 23:22:32,500 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:32,500 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:32,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:32,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 23:22:32,720 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:32,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:32,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1952417192, now seen corresponding path program 11 times [2021-10-28 23:22:32,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:32,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387191241] [2021-10-28 23:22:32,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:32,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:32,731 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:32,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963849391] [2021-10-28 23:22:32,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:22:32,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:32,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:32,735 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:32,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-28 23:22:35,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-10-28 23:22:35,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:35,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 23:22:35,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:35,743 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:35,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:35,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387191241] [2021-10-28 23:22:35,744 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:35,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963849391] [2021-10-28 23:22:35,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963849391] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:35,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:35,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-10-28 23:22:35,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763938875] [2021-10-28 23:22:35,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 23:22:35,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:35,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 23:22:35,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:22:35,747 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:35,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:35,887 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2021-10-28 23:22:35,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 23:22:35,887 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 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 [2021-10-28 23:22:35,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:35,888 INFO L225 Difference]: With dead ends: 96 [2021-10-28 23:22:35,888 INFO L226 Difference]: Without dead ends: 92 [2021-10-28 23:22:35,889 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-10-28 23:22:35,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-28 23:22:35,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-10-28 23:22:35,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 91 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) [2021-10-28 23:22:35,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2021-10-28 23:22:35,901 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 73 [2021-10-28 23:22:35,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:35,901 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2021-10-28 23:22:35,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:35,902 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2021-10-28 23:22:35,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-28 23:22:35,902 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:35,903 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:35,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:36,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 23:22:36,113 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:36,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:36,114 INFO L85 PathProgramCache]: Analyzing trace with hash -2030484230, now seen corresponding path program 12 times [2021-10-28 23:22:36,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:36,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614242585] [2021-10-28 23:22:36,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:36,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:36,124 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:36,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095995857] [2021-10-28 23:22:36,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:22:36,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:36,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:36,128 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:36,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-28 23:22:38,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-10-28 23:22:38,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:38,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 23:22:38,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:38,990 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:38,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:38,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614242585] [2021-10-28 23:22:38,991 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:38,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095995857] [2021-10-28 23:22:38,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095995857] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:38,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:38,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-10-28 23:22:38,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95250181] [2021-10-28 23:22:38,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 23:22:38,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:38,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 23:22:38,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:22:38,994 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:39,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:39,168 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2021-10-28 23:22:39,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 23:22:39,168 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 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 [2021-10-28 23:22:39,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:39,169 INFO L225 Difference]: With dead ends: 102 [2021-10-28 23:22:39,170 INFO L226 Difference]: Without dead ends: 98 [2021-10-28 23:22:39,170 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-10-28 23:22:39,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-28 23:22:39,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-10-28 23:22:39,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 97 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:39,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2021-10-28 23:22:39,183 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 79 [2021-10-28 23:22:39,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:39,184 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2021-10-28 23:22:39,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:39,184 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2021-10-28 23:22:39,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-28 23:22:39,185 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:39,185 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:39,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:39,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 23:22:39,396 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:39,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:39,396 INFO L85 PathProgramCache]: Analyzing trace with hash 986103500, now seen corresponding path program 13 times [2021-10-28 23:22:39,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:39,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916406187] [2021-10-28 23:22:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:39,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:39,412 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:39,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929619147] [2021-10-28 23:22:39,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:22:39,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:39,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:39,414 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:39,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-28 23:22:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:22:39,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 23:22:39,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:40,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:40,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916406187] [2021-10-28 23:22:40,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:40,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929619147] [2021-10-28 23:22:40,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929619147] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:40,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:40,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-10-28 23:22:40,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167980418] [2021-10-28 23:22:40,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 23:22:40,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:40,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 23:22:40,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:22:40,352 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 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) [2021-10-28 23:22:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:40,532 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2021-10-28 23:22:40,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 23:22:40,532 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 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 85 [2021-10-28 23:22:40,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:40,533 INFO L225 Difference]: With dead ends: 108 [2021-10-28 23:22:40,533 INFO L226 Difference]: Without dead ends: 104 [2021-10-28 23:22:40,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-10-28 23:22:40,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-28 23:22:40,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-10-28 23:22:40,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.1553398058252426) internal successors, (119), 103 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:40,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2021-10-28 23:22:40,546 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 85 [2021-10-28 23:22:40,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:40,546 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2021-10-28 23:22:40,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 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) [2021-10-28 23:22:40,547 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2021-10-28 23:22:40,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-10-28 23:22:40,548 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:40,548 INFO L513 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:40,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:40,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:40,756 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:40,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:40,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1471288094, now seen corresponding path program 14 times [2021-10-28 23:22:40,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:40,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955866441] [2021-10-28 23:22:40,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:40,756 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:40,777 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:40,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197885912] [2021-10-28 23:22:40,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:22:40,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:40,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:40,779 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:40,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-28 23:22:41,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:22:41,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:41,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-28 23:22:41,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:41,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:41,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955866441] [2021-10-28 23:22:41,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:41,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197885912] [2021-10-28 23:22:41,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197885912] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:41,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:41,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-10-28 23:22:41,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062186370] [2021-10-28 23:22:41,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 23:22:41,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:41,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 23:22:41,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:22:41,794 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 17 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:42,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:42,048 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2021-10-28 23:22:42,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-28 23:22:42,049 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 17 states have internal predecessors, (91), 0 states have call successors, (0), 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 [2021-10-28 23:22:42,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:42,050 INFO L225 Difference]: With dead ends: 114 [2021-10-28 23:22:42,050 INFO L226 Difference]: Without dead ends: 110 [2021-10-28 23:22:42,051 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:22:42,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-28 23:22:42,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-10-28 23:22:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 109 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2021-10-28 23:22:42,064 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 91 [2021-10-28 23:22:42,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:42,064 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2021-10-28 23:22:42,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 17 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2021-10-28 23:22:42,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-10-28 23:22:42,065 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:42,066 INFO L513 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:42,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:42,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:42,266 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:42,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:42,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1435329008, now seen corresponding path program 15 times [2021-10-28 23:22:42,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:42,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504829240] [2021-10-28 23:22:42,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:42,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:42,277 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:42,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [900317113] [2021-10-28 23:22:42,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:22:42,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:42,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:42,279 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:42,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-28 23:22:43,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-10-28 23:22:43,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:43,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-28 23:22:43,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:43,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:43,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504829240] [2021-10-28 23:22:43,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:43,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900317113] [2021-10-28 23:22:43,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900317113] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:43,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:43,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-10-28 23:22:43,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118149404] [2021-10-28 23:22:43,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 23:22:43,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:43,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 23:22:43,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:22:43,600 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:43,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:43,819 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2021-10-28 23:22:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-28 23:22:43,820 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2021-10-28 23:22:43,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:43,821 INFO L225 Difference]: With dead ends: 120 [2021-10-28 23:22:43,821 INFO L226 Difference]: Without dead ends: 116 [2021-10-28 23:22:43,822 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 23:22:43,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-28 23:22:43,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-10-28 23:22:43,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.1565217391304348) internal successors, (133), 115 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:43,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 133 transitions. [2021-10-28 23:22:43,837 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 133 transitions. Word has length 97 [2021-10-28 23:22:43,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:43,838 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 133 transitions. [2021-10-28 23:22:43,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:43,838 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 133 transitions. [2021-10-28 23:22:43,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-10-28 23:22:43,839 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:43,840 INFO L513 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:43,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:44,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:44,048 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:44,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:44,048 INFO L85 PathProgramCache]: Analyzing trace with hash -837629118, now seen corresponding path program 16 times [2021-10-28 23:22:44,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:44,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390656302] [2021-10-28 23:22:44,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:44,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:44,062 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:44,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373820949] [2021-10-28 23:22:44,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:22:44,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:44,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:44,064 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:44,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-28 23:22:44,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:22:44,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:44,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 23:22:44,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:45,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:45,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390656302] [2021-10-28 23:22:45,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:45,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373820949] [2021-10-28 23:22:45,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373820949] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:45,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:45,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-10-28 23:22:45,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629295667] [2021-10-28 23:22:45,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 23:22:45,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:45,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 23:22:45,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:22:45,253 INFO L87 Difference]: Start difference. First operand 116 states and 133 transitions. Second operand has 20 states, 20 states have (on average 5.15) internal successors, (103), 19 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) [2021-10-28 23:22:45,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:45,539 INFO L93 Difference]: Finished difference Result 126 states and 144 transitions. [2021-10-28 23:22:45,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-28 23:22:45,539 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 19 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 103 [2021-10-28 23:22:45,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:45,540 INFO L225 Difference]: With dead ends: 126 [2021-10-28 23:22:45,540 INFO L226 Difference]: Without dead ends: 122 [2021-10-28 23:22:45,541 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 23:22:45,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-28 23:22:45,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-10-28 23:22:45,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1570247933884297) internal successors, (140), 121 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:45,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 140 transitions. [2021-10-28 23:22:45,553 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 140 transitions. Word has length 103 [2021-10-28 23:22:45,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:45,554 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 140 transitions. [2021-10-28 23:22:45,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 19 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) [2021-10-28 23:22:45,554 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 140 transitions. [2021-10-28 23:22:45,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-10-28 23:22:45,556 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:45,556 INFO L513 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:45,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-28 23:22:45,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:45,761 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:45,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:45,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1860464404, now seen corresponding path program 17 times [2021-10-28 23:22:45,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:45,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243544529] [2021-10-28 23:22:45,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:45,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:45,773 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:45,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229297546] [2021-10-28 23:22:45,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:22:45,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:45,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:45,775 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:45,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-28 23:22:48,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-10-28 23:22:48,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:48,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-28 23:22:48,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:48,993 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:48,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:48,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243544529] [2021-10-28 23:22:48,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:48,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229297546] [2021-10-28 23:22:48,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229297546] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:48,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:48,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-10-28 23:22:48,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336941393] [2021-10-28 23:22:48,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 23:22:48,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:48,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 23:22:48,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:22:48,996 INFO L87 Difference]: Start difference. First operand 122 states and 140 transitions. Second operand has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 20 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:49,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:49,302 INFO L93 Difference]: Finished difference Result 132 states and 151 transitions. [2021-10-28 23:22:49,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-28 23:22:49,305 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 20 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2021-10-28 23:22:49,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:49,306 INFO L225 Difference]: With dead ends: 132 [2021-10-28 23:22:49,306 INFO L226 Difference]: Without dead ends: 128 [2021-10-28 23:22:49,307 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 23:22:49,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-28 23:22:49,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-10-28 23:22:49,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.1574803149606299) internal successors, (147), 127 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 147 transitions. [2021-10-28 23:22:49,320 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 147 transitions. Word has length 109 [2021-10-28 23:22:49,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:49,321 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 147 transitions. [2021-10-28 23:22:49,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 20 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:49,321 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 147 transitions. [2021-10-28 23:22:49,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-28 23:22:49,322 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:49,322 INFO L513 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:49,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:49,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-28 23:22:49,523 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:49,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:49,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1804365158, now seen corresponding path program 18 times [2021-10-28 23:22:49,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:49,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895937169] [2021-10-28 23:22:49,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:49,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:49,535 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:49,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407526902] [2021-10-28 23:22:49,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:22:49,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:49,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:49,537 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:49,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-28 23:22:53,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-10-28 23:22:53,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:53,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-28 23:22:53,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:53,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:53,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895937169] [2021-10-28 23:22:53,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:53,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407526902] [2021-10-28 23:22:53,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407526902] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:53,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:53,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-10-28 23:22:53,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53198286] [2021-10-28 23:22:53,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 23:22:53,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:53,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 23:22:53,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:22:53,911 INFO L87 Difference]: Start difference. First operand 128 states and 147 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:54,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:54,209 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2021-10-28 23:22:54,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-28 23:22:54,210 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 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 115 [2021-10-28 23:22:54,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:54,211 INFO L225 Difference]: With dead ends: 138 [2021-10-28 23:22:54,211 INFO L226 Difference]: Without dead ends: 134 [2021-10-28 23:22:54,212 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 23:22:54,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-28 23:22:54,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-10-28 23:22:54,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.1578947368421053) internal successors, (154), 133 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:54,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 154 transitions. [2021-10-28 23:22:54,228 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 154 transitions. Word has length 115 [2021-10-28 23:22:54,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:54,229 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 154 transitions. [2021-10-28 23:22:54,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:54,229 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 154 transitions. [2021-10-28 23:22:54,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-10-28 23:22:54,231 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:54,231 INFO L513 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:54,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:54,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-28 23:22:54,442 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:54,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:54,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1870456376, now seen corresponding path program 19 times [2021-10-28 23:22:54,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:54,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342319784] [2021-10-28 23:22:54,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:54,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:54,456 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:54,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379852847] [2021-10-28 23:22:54,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:22:54,457 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:54,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:54,458 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:54,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-28 23:22:55,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:22:55,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-28 23:22:55,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:55,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:55,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342319784] [2021-10-28 23:22:55,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:55,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379852847] [2021-10-28 23:22:55,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379852847] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:55,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:55,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-10-28 23:22:55,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168903471] [2021-10-28 23:22:55,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 23:22:55,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:55,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 23:22:55,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:22:55,783 INFO L87 Difference]: Start difference. First operand 134 states and 154 transitions. Second operand has 23 states, 23 states have (on average 5.260869565217392) internal successors, (121), 22 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:56,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:56,086 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2021-10-28 23:22:56,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-28 23:22:56,087 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.260869565217392) internal successors, (121), 22 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-10-28 23:22:56,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:56,088 INFO L225 Difference]: With dead ends: 144 [2021-10-28 23:22:56,088 INFO L226 Difference]: Without dead ends: 140 [2021-10-28 23:22:56,089 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 23:22:56,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-28 23:22:56,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-10-28 23:22:56,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.158273381294964) internal successors, (161), 139 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:56,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 161 transitions. [2021-10-28 23:22:56,106 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 161 transitions. Word has length 121 [2021-10-28 23:22:56,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:56,106 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 161 transitions. [2021-10-28 23:22:56,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.260869565217392) internal successors, (121), 22 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:56,107 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 161 transitions. [2021-10-28 23:22:56,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-10-28 23:22:56,108 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:56,108 INFO L513 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:56,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-28 23:22:56,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-28 23:22:56,312 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:56,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:56,312 INFO L85 PathProgramCache]: Analyzing trace with hash 269482378, now seen corresponding path program 20 times [2021-10-28 23:22:56,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:56,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676159642] [2021-10-28 23:22:56,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:56,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:56,325 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:56,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689706213] [2021-10-28 23:22:56,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:22:56,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:56,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:56,328 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:56,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-28 23:22:57,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:22:57,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:22:57,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-28 23:22:57,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:22:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:22:57,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:22:57,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676159642] [2021-10-28 23:22:57,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:22:57,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689706213] [2021-10-28 23:22:57,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689706213] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:22:57,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:22:57,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-10-28 23:22:57,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617775022] [2021-10-28 23:22:57,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-28 23:22:57,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:22:57,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-28 23:22:57,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-10-28 23:22:57,770 INFO L87 Difference]: Start difference. First operand 140 states and 161 transitions. Second operand has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 23 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:58,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:22:58,154 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2021-10-28 23:22:58,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-28 23:22:58,155 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 23 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2021-10-28 23:22:58,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:22:58,156 INFO L225 Difference]: With dead ends: 150 [2021-10-28 23:22:58,156 INFO L226 Difference]: Without dead ends: 146 [2021-10-28 23:22:58,158 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=715, Invalid=1177, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 23:22:58,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-28 23:22:58,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-10-28 23:22:58,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.1586206896551725) internal successors, (168), 145 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:58,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 168 transitions. [2021-10-28 23:22:58,170 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 168 transitions. Word has length 127 [2021-10-28 23:22:58,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:22:58,171 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 168 transitions. [2021-10-28 23:22:58,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 23 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:22:58,171 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 168 transitions. [2021-10-28 23:22:58,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-10-28 23:22:58,173 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:22:58,173 INFO L513 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2021-10-28 23:22:58,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-10-28 23:22:58,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-28 23:22:58,399 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:22:58,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:22:58,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1098397860, now seen corresponding path program 21 times [2021-10-28 23:22:58,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:22:58,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716091205] [2021-10-28 23:22:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:22:58,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:22:58,409 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:22:58,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734950197] [2021-10-28 23:22:58,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:22:58,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:22:58,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:22:58,412 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:22:58,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-28 23:23:00,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-10-28 23:23:00,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:23:00,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-28 23:23:00,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:23:00,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 0 proven. 1302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:23:00,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:23:00,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716091205] [2021-10-28 23:23:00,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:23:00,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734950197] [2021-10-28 23:23:00,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734950197] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:23:00,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:23:00,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-10-28 23:23:00,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814261755] [2021-10-28 23:23:00,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 23:23:00,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:23:00,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 23:23:00,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-10-28 23:23:00,772 INFO L87 Difference]: Start difference. First operand 146 states and 168 transitions. Second operand has 25 states, 25 states have (on average 5.32) internal successors, (133), 24 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:23:01,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:23:01,110 INFO L93 Difference]: Finished difference Result 156 states and 179 transitions. [2021-10-28 23:23:01,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-28 23:23:01,111 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.32) internal successors, (133), 24 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-10-28 23:23:01,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:23:01,112 INFO L225 Difference]: With dead ends: 156 [2021-10-28 23:23:01,112 INFO L226 Difference]: Without dead ends: 152 [2021-10-28 23:23:01,113 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=782, Invalid=1288, Unknown=0, NotChecked=0, Total=2070 [2021-10-28 23:23:01,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-28 23:23:01,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-10-28 23:23:01,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.1589403973509933) internal successors, (175), 151 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:23:01,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 175 transitions. [2021-10-28 23:23:01,128 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 175 transitions. Word has length 133 [2021-10-28 23:23:01,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:23:01,129 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 175 transitions. [2021-10-28 23:23:01,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.32) internal successors, (133), 24 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:23:01,129 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 175 transitions. [2021-10-28 23:23:01,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-10-28 23:23:01,130 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:23:01,130 INFO L513 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2021-10-28 23:23:01,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-28 23:23:01,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:23:01,341 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:23:01,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:23:01,341 INFO L85 PathProgramCache]: Analyzing trace with hash 974024622, now seen corresponding path program 22 times [2021-10-28 23:23:01,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:23:01,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213561744] [2021-10-28 23:23:01,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:23:01,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:23:01,354 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:23:01,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001592023] [2021-10-28 23:23:01,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:23:01,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:23:01,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:23:01,363 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:23:01,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-28 23:23:02,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:23:02,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:23:02,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-28 23:23:02,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:23:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:23:03,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:23:03,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213561744] [2021-10-28 23:23:03,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:23:03,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001592023] [2021-10-28 23:23:03,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001592023] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:23:03,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:23:03,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-10-28 23:23:03,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414997867] [2021-10-28 23:23:03,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 23:23:03,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:23:03,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 23:23:03,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-10-28 23:23:03,019 INFO L87 Difference]: Start difference. First operand 152 states and 175 transitions. Second operand has 26 states, 26 states have (on average 5.346153846153846) internal successors, (139), 25 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:23:03,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:23:03,441 INFO L93 Difference]: Finished difference Result 162 states and 186 transitions. [2021-10-28 23:23:03,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-28 23:23:03,442 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.346153846153846) internal successors, (139), 25 states have internal predecessors, (139), 0 states have call successors, (0), 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 139 [2021-10-28 23:23:03,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:23:03,444 INFO L225 Difference]: With dead ends: 162 [2021-10-28 23:23:03,444 INFO L226 Difference]: Without dead ends: 158 [2021-10-28 23:23:03,445 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=852, Invalid=1404, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 23:23:03,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-28 23:23:03,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-10-28 23:23:03,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.1592356687898089) internal successors, (182), 157 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:23:03,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 182 transitions. [2021-10-28 23:23:03,462 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 182 transitions. Word has length 139 [2021-10-28 23:23:03,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:23:03,462 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 182 transitions. [2021-10-28 23:23:03,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.346153846153846) internal successors, (139), 25 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:23:03,463 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 182 transitions. [2021-10-28 23:23:03,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-10-28 23:23:03,464 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:23:03,465 INFO L513 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2021-10-28 23:23:03,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-28 23:23:03,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-28 23:23:03,679 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:23:03,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:23:03,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2118774144, now seen corresponding path program 23 times [2021-10-28 23:23:03,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:23:03,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851980159] [2021-10-28 23:23:03,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:23:03,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:23:03,690 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:23:03,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27568314] [2021-10-28 23:23:03,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:23:03,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:23:03,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:23:03,691 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:23:03,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-28 23:23:06,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-10-28 23:23:06,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:23:06,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-28 23:23:06,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:23:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 1564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:23:07,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:23:07,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851980159] [2021-10-28 23:23:07,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:23:07,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27568314] [2021-10-28 23:23:07,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27568314] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:23:07,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:23:07,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-10-28 23:23:07,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547892722] [2021-10-28 23:23:07,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 23:23:07,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:23:07,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 23:23:07,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:23:07,182 INFO L87 Difference]: Start difference. First operand 158 states and 182 transitions. Second operand has 27 states, 27 states have (on average 5.37037037037037) internal successors, (145), 26 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) [2021-10-28 23:23:07,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:23:07,675 INFO L93 Difference]: Finished difference Result 168 states and 193 transitions. [2021-10-28 23:23:07,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-28 23:23:07,676 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.37037037037037) internal successors, (145), 26 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 145 [2021-10-28 23:23:07,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:23:07,677 INFO L225 Difference]: With dead ends: 168 [2021-10-28 23:23:07,678 INFO L226 Difference]: Without dead ends: 164 [2021-10-28 23:23:07,679 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=925, Invalid=1525, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 23:23:07,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-10-28 23:23:07,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-10-28 23:23:07,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.1595092024539877) internal successors, (189), 163 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:23:07,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 189 transitions. [2021-10-28 23:23:07,706 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 189 transitions. Word has length 145 [2021-10-28 23:23:07,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:23:07,707 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 189 transitions. [2021-10-28 23:23:07,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.37037037037037) internal successors, (145), 26 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) [2021-10-28 23:23:07,707 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 189 transitions. [2021-10-28 23:23:07,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-10-28 23:23:07,709 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:23:07,710 INFO L513 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2021-10-28 23:23:07,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-28 23:23:07,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-28 23:23:07,922 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:23:07,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:23:07,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1182322642, now seen corresponding path program 24 times [2021-10-28 23:23:07,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:23:07,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396624223] [2021-10-28 23:23:07,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:23:07,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:23:07,936 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:23:07,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577481806] [2021-10-28 23:23:07,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:23:07,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:23:07,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:23:07,938 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:23:07,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-28 23:23:19,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-10-28 23:23:19,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:23:19,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-28 23:23:19,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:23:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 0 proven. 1704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:23:19,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:23:19,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396624223] [2021-10-28 23:23:19,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:23:19,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577481806] [2021-10-28 23:23:19,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577481806] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:23:19,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:23:19,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-10-28 23:23:19,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122824803] [2021-10-28 23:23:19,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 23:23:19,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:23:19,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 23:23:19,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-10-28 23:23:19,772 INFO L87 Difference]: Start difference. First operand 164 states and 189 transitions. Second operand has 28 states, 28 states have (on average 5.392857142857143) internal successors, (151), 27 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:23:20,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:23:20,271 INFO L93 Difference]: Finished difference Result 174 states and 200 transitions. [2021-10-28 23:23:20,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-28 23:23:20,272 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.392857142857143) internal successors, (151), 27 states have internal predecessors, (151), 0 states have call successors, (0), 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 151 [2021-10-28 23:23:20,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:23:20,273 INFO L225 Difference]: With dead ends: 174 [2021-10-28 23:23:20,273 INFO L226 Difference]: Without dead ends: 170 [2021-10-28 23:23:20,275 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1001, Invalid=1651, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 23:23:20,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-10-28 23:23:20,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-10-28 23:23:20,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.1597633136094674) internal successors, (196), 169 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:23:20,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 196 transitions. [2021-10-28 23:23:20,292 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 196 transitions. Word has length 151 [2021-10-28 23:23:20,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:23:20,292 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 196 transitions. [2021-10-28 23:23:20,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.392857142857143) internal successors, (151), 27 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:23:20,293 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 196 transitions. [2021-10-28 23:23:20,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-10-28 23:23:20,294 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:23:20,294 INFO L513 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2021-10-28 23:23:20,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-28 23:23:20,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-28 23:23:20,507 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:23:20,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:23:20,507 INFO L85 PathProgramCache]: Analyzing trace with hash -583481436, now seen corresponding path program 25 times [2021-10-28 23:23:20,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:23:20,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478830672] [2021-10-28 23:23:20,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:23:20,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:23:20,520 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:23:20,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266876154] [2021-10-28 23:23:20,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:23:20,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:23:20,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:23:20,522 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:23:20,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-28 23:23:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:23:21,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 53 conjunts are in the unsatisfiable core [2021-10-28 23:23:21,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:23:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 0 proven. 1850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:23:22,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:23:22,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478830672] [2021-10-28 23:23:22,363 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:23:22,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266876154] [2021-10-28 23:23:22,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266876154] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:23:22,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:23:22,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-10-28 23:23:22,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726357003] [2021-10-28 23:23:22,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 23:23:22,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:23:22,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 23:23:22,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-10-28 23:23:22,365 INFO L87 Difference]: Start difference. First operand 170 states and 196 transitions. Second operand has 29 states, 29 states have (on average 5.413793103448276) internal successors, (157), 28 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:23:22,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:23:22,873 INFO L93 Difference]: Finished difference Result 180 states and 207 transitions. [2021-10-28 23:23:22,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-28 23:23:22,873 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.413793103448276) internal successors, (157), 28 states have internal predecessors, (157), 0 states have call successors, (0), 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 157 [2021-10-28 23:23:22,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:23:22,874 INFO L225 Difference]: With dead ends: 180 [2021-10-28 23:23:22,874 INFO L226 Difference]: Without dead ends: 176 [2021-10-28 23:23:22,875 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1080, Invalid=1782, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 23:23:22,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-10-28 23:23:22,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2021-10-28 23:23:22,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.16) internal successors, (203), 175 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) [2021-10-28 23:23:22,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 203 transitions. [2021-10-28 23:23:22,889 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 203 transitions. Word has length 157 [2021-10-28 23:23:22,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:23:22,889 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 203 transitions. [2021-10-28 23:23:22,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.413793103448276) internal successors, (157), 28 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:23:22,889 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 203 transitions. [2021-10-28 23:23:22,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-10-28 23:23:22,890 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:23:22,890 INFO L513 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2021-10-28 23:23:22,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-28 23:23:23,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:23:23,091 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:23:23,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:23:23,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1329587722, now seen corresponding path program 26 times [2021-10-28 23:23:23,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:23:23,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35555937] [2021-10-28 23:23:23,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:23:23,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:23:23,104 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:23:23,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105802833] [2021-10-28 23:23:23,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:23:23,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:23:23,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:23:23,106 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:23:23,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-28 23:23:24,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:23:24,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:23:24,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-28 23:23:24,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:23:25,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:23:25,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:23:25,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35555937] [2021-10-28 23:23:25,053 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:23:25,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105802833] [2021-10-28 23:23:25,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105802833] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:23:25,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:23:25,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-10-28 23:23:25,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085660497] [2021-10-28 23:23:25,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-28 23:23:25,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:23:25,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-28 23:23:25,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-10-28 23:23:25,055 INFO L87 Difference]: Start difference. First operand 176 states and 203 transitions. Second operand has 30 states, 30 states have (on average 5.433333333333334) internal successors, (163), 29 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:23:25,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:23:25,526 INFO L93 Difference]: Finished difference Result 186 states and 214 transitions. [2021-10-28 23:23:25,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-10-28 23:23:25,527 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.433333333333334) internal successors, (163), 29 states have internal predecessors, (163), 0 states have call successors, (0), 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 163 [2021-10-28 23:23:25,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:23:25,528 INFO L225 Difference]: With dead ends: 186 [2021-10-28 23:23:25,528 INFO L226 Difference]: Without dead ends: 182 [2021-10-28 23:23:25,529 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1162, Invalid=1918, Unknown=0, NotChecked=0, Total=3080 [2021-10-28 23:23:25,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-10-28 23:23:25,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-10-28 23:23:25,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.160220994475138) internal successors, (210), 181 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:23:25,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 210 transitions. [2021-10-28 23:23:25,543 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 210 transitions. Word has length 163 [2021-10-28 23:23:25,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:23:25,543 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 210 transitions. [2021-10-28 23:23:25,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.433333333333334) internal successors, (163), 29 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:23:25,544 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 210 transitions. [2021-10-28 23:23:25,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-10-28 23:23:25,545 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:23:25,545 INFO L513 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2021-10-28 23:23:25,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-28 23:23:25,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:23:25,756 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:23:25,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:23:25,756 INFO L85 PathProgramCache]: Analyzing trace with hash 868280008, now seen corresponding path program 27 times [2021-10-28 23:23:25,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:23:25,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141853577] [2021-10-28 23:23:25,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:23:25,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:23:25,781 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:23:25,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102446451] [2021-10-28 23:23:25,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:23:25,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:23:25,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:23:25,785 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:23:25,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-28 23:23:33,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-10-28 23:23:33,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:23:33,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-28 23:23:33,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:23:34,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 0 proven. 2160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:23:34,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:23:34,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141853577] [2021-10-28 23:23:34,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:23:34,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102446451] [2021-10-28 23:23:34,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102446451] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:23:34,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:23:34,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-10-28 23:23:34,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252442012] [2021-10-28 23:23:34,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-28 23:23:34,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:23:34,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-28 23:23:34,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-10-28 23:23:34,156 INFO L87 Difference]: Start difference. First operand 182 states and 210 transitions. Second operand has 31 states, 31 states have (on average 5.451612903225806) internal successors, (169), 30 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:23:34,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:23:34,652 INFO L93 Difference]: Finished difference Result 192 states and 221 transitions. [2021-10-28 23:23:34,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-10-28 23:23:34,652 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.451612903225806) internal successors, (169), 30 states have internal predecessors, (169), 0 states have call successors, (0), 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 169 [2021-10-28 23:23:34,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:23:34,654 INFO L225 Difference]: With dead ends: 192 [2021-10-28 23:23:34,654 INFO L226 Difference]: Without dead ends: 188 [2021-10-28 23:23:34,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1247, Invalid=2059, Unknown=0, NotChecked=0, Total=3306 [2021-10-28 23:23:34,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-10-28 23:23:34,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-10-28 23:23:34,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.160427807486631) internal successors, (217), 187 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:23:34,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 217 transitions. [2021-10-28 23:23:34,674 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 217 transitions. Word has length 169 [2021-10-28 23:23:34,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:23:34,674 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 217 transitions. [2021-10-28 23:23:34,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.451612903225806) internal successors, (169), 30 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:23:34,675 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 217 transitions. [2021-10-28 23:23:34,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-10-28 23:23:34,676 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:23:34,676 INFO L513 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2021-10-28 23:23:34,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-28 23:23:34,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-10-28 23:23:34,889 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:23:34,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:23:34,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1389710874, now seen corresponding path program 28 times [2021-10-28 23:23:34,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:23:34,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264081944] [2021-10-28 23:23:34,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:23:34,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:23:34,915 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:23:34,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518849836] [2021-10-28 23:23:34,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:23:34,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:23:34,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:23:34,918 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:23:34,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-28 23:23:36,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:23:36,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:23:36,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-28 23:23:36,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:23:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 0 proven. 2324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:23:37,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:23:37,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264081944] [2021-10-28 23:23:37,011 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:23:37,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518849836] [2021-10-28 23:23:37,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518849836] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:23:37,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:23:37,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-10-28 23:23:37,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211526575] [2021-10-28 23:23:37,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 23:23:37,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:23:37,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 23:23:37,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:23:37,012 INFO L87 Difference]: Start difference. First operand 188 states and 217 transitions. Second operand has 32 states, 32 states have (on average 5.46875) internal successors, (175), 31 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:23:37,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:23:37,470 INFO L93 Difference]: Finished difference Result 198 states and 228 transitions. [2021-10-28 23:23:37,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-10-28 23:23:37,470 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.46875) internal successors, (175), 31 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-10-28 23:23:37,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:23:37,472 INFO L225 Difference]: With dead ends: 198 [2021-10-28 23:23:37,472 INFO L226 Difference]: Without dead ends: 194 [2021-10-28 23:23:37,473 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1335, Invalid=2205, Unknown=0, NotChecked=0, Total=3540 [2021-10-28 23:23:37,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-10-28 23:23:37,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2021-10-28 23:23:37,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.160621761658031) internal successors, (224), 193 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:23:37,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 224 transitions. [2021-10-28 23:23:37,495 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 224 transitions. Word has length 175 [2021-10-28 23:23:37,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:23:37,495 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 224 transitions. [2021-10-28 23:23:37,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.46875) internal successors, (175), 31 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:23:37,496 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 224 transitions. [2021-10-28 23:23:37,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-10-28 23:23:37,497 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:23:37,497 INFO L513 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2021-10-28 23:23:37,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-28 23:23:37,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:23:37,709 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:23:37,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:23:37,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1719627756, now seen corresponding path program 29 times [2021-10-28 23:23:37,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:23:37,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843590246] [2021-10-28 23:23:37,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:23:37,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:23:37,729 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:23:37,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711705031] [2021-10-28 23:23:37,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:23:37,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:23:37,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:23:37,731 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:23:37,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-28 23:23:53,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-10-28 23:23:53,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:23:53,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 61 conjunts are in the unsatisfiable core [2021-10-28 23:23:53,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:23:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 0 proven. 2494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:23:54,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:23:54,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843590246] [2021-10-28 23:23:54,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:23:54,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711705031] [2021-10-28 23:23:54,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711705031] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:23:54,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:23:54,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-10-28 23:23:54,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484093349] [2021-10-28 23:23:54,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-28 23:23:54,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:23:54,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-28 23:23:54,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 23:23:54,217 INFO L87 Difference]: Start difference. First operand 194 states and 224 transitions. Second operand has 33 states, 33 states have (on average 5.484848484848484) internal successors, (181), 32 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:23:54,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:23:54,735 INFO L93 Difference]: Finished difference Result 204 states and 235 transitions. [2021-10-28 23:23:54,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-10-28 23:23:54,736 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.484848484848484) internal successors, (181), 32 states have internal predecessors, (181), 0 states have call successors, (0), 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 181 [2021-10-28 23:23:54,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:23:54,737 INFO L225 Difference]: With dead ends: 204 [2021-10-28 23:23:54,737 INFO L226 Difference]: Without dead ends: 200 [2021-10-28 23:23:54,738 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1426, Invalid=2356, Unknown=0, NotChecked=0, Total=3782 [2021-10-28 23:23:54,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-10-28 23:23:54,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2021-10-28 23:23:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.1608040201005025) internal successors, (231), 199 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:23:54,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 231 transitions. [2021-10-28 23:23:54,751 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 231 transitions. Word has length 181 [2021-10-28 23:23:54,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:23:54,751 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 231 transitions. [2021-10-28 23:23:54,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.484848484848484) internal successors, (181), 32 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:23:54,751 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 231 transitions. [2021-10-28 23:23:54,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-10-28 23:23:54,752 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:23:54,752 INFO L513 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2021-10-28 23:23:54,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-28 23:23:54,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:23:54,953 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:23:54,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:23:54,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1524011970, now seen corresponding path program 30 times [2021-10-28 23:23:54,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:23:54,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732003309] [2021-10-28 23:23:54,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:23:54,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:23:54,985 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:23:54,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [853672453] [2021-10-28 23:23:54,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:23:54,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:23:54,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:23:54,986 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:23:54,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-28 23:24:03,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-10-28 23:24:03,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:24:03,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 63 conjunts are in the unsatisfiable core [2021-10-28 23:24:03,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:24:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:24:03,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:24:03,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732003309] [2021-10-28 23:24:03,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:24:03,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853672453] [2021-10-28 23:24:03,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853672453] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:24:03,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:24:03,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-10-28 23:24:03,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21828365] [2021-10-28 23:24:03,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-28 23:24:03,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:24:03,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-28 23:24:03,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 23:24:03,948 INFO L87 Difference]: Start difference. First operand 200 states and 231 transitions. Second operand has 34 states, 34 states have (on average 5.5) internal successors, (187), 33 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) [2021-10-28 23:24:04,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:24:04,466 INFO L93 Difference]: Finished difference Result 210 states and 242 transitions. [2021-10-28 23:24:04,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-10-28 23:24:04,466 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.5) internal successors, (187), 33 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 187 [2021-10-28 23:24:04,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:24:04,467 INFO L225 Difference]: With dead ends: 210 [2021-10-28 23:24:04,467 INFO L226 Difference]: Without dead ends: 206 [2021-10-28 23:24:04,469 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1520, Invalid=2512, Unknown=0, NotChecked=0, Total=4032 [2021-10-28 23:24:04,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-10-28 23:24:04,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-10-28 23:24:04,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.1609756097560975) internal successors, (238), 205 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:04,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 238 transitions. [2021-10-28 23:24:04,485 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 238 transitions. Word has length 187 [2021-10-28 23:24:04,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:24:04,485 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 238 transitions. [2021-10-28 23:24:04,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.5) internal successors, (187), 33 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) [2021-10-28 23:24:04,486 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 238 transitions. [2021-10-28 23:24:04,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-10-28 23:24:04,487 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:24:04,487 INFO L513 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2021-10-28 23:24:04,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-10-28 23:24:04,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-28 23:24:04,702 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:24:04,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:24:04,702 INFO L85 PathProgramCache]: Analyzing trace with hash 354771728, now seen corresponding path program 31 times [2021-10-28 23:24:04,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:24:04,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086630206] [2021-10-28 23:24:04,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:24:04,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:24:04,727 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:24:04,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227911129] [2021-10-28 23:24:04,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:24:04,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:24:04,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:24:04,731 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:24:04,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-28 23:24:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:24:05,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-28 23:24:05,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:24:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 0 proven. 2852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:24:06,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:24:06,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086630206] [2021-10-28 23:24:06,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:24:06,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227911129] [2021-10-28 23:24:06,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227911129] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:24:06,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:24:06,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-10-28 23:24:06,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19447000] [2021-10-28 23:24:06,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 23:24:06,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:24:06,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 23:24:06,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 23:24:06,834 INFO L87 Difference]: Start difference. First operand 206 states and 238 transitions. Second operand has 35 states, 35 states have (on average 5.514285714285714) internal successors, (193), 34 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:07,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:24:07,496 INFO L93 Difference]: Finished difference Result 216 states and 249 transitions. [2021-10-28 23:24:07,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-10-28 23:24:07,497 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.514285714285714) internal successors, (193), 34 states have internal predecessors, (193), 0 states have call successors, (0), 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 193 [2021-10-28 23:24:07,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:24:07,499 INFO L225 Difference]: With dead ends: 216 [2021-10-28 23:24:07,499 INFO L226 Difference]: Without dead ends: 212 [2021-10-28 23:24:07,500 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1617, Invalid=2673, Unknown=0, NotChecked=0, Total=4290 [2021-10-28 23:24:07,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-10-28 23:24:07,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-10-28 23:24:07,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.161137440758294) internal successors, (245), 211 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:07,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 245 transitions. [2021-10-28 23:24:07,522 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 245 transitions. Word has length 193 [2021-10-28 23:24:07,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:24:07,523 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 245 transitions. [2021-10-28 23:24:07,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.514285714285714) internal successors, (193), 34 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:07,523 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 245 transitions. [2021-10-28 23:24:07,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-10-28 23:24:07,524 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:24:07,525 INFO L513 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2021-10-28 23:24:07,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-10-28 23:24:07,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:24:07,735 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:24:07,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:24:07,736 INFO L85 PathProgramCache]: Analyzing trace with hash -22186910, now seen corresponding path program 32 times [2021-10-28 23:24:07,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:24:07,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912137494] [2021-10-28 23:24:07,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:24:07,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:24:07,752 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:24:07,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [280275632] [2021-10-28 23:24:07,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:24:07,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:24:07,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:24:07,754 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:24:07,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-28 23:24:09,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:24:09,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:24:09,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 67 conjunts are in the unsatisfiable core [2021-10-28 23:24:09,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:24:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 0 proven. 3040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:24:09,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:24:09,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912137494] [2021-10-28 23:24:09,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:24:09,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280275632] [2021-10-28 23:24:09,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280275632] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:24:09,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:24:09,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-10-28 23:24:09,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634045727] [2021-10-28 23:24:09,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-28 23:24:09,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:24:09,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-28 23:24:09,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 23:24:09,978 INFO L87 Difference]: Start difference. First operand 212 states and 245 transitions. Second operand has 36 states, 36 states have (on average 5.527777777777778) internal successors, (199), 35 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:10,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:24:10,682 INFO L93 Difference]: Finished difference Result 222 states and 256 transitions. [2021-10-28 23:24:10,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-10-28 23:24:10,682 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.527777777777778) internal successors, (199), 35 states have internal predecessors, (199), 0 states have call successors, (0), 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 199 [2021-10-28 23:24:10,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:24:10,684 INFO L225 Difference]: With dead ends: 222 [2021-10-28 23:24:10,684 INFO L226 Difference]: Without dead ends: 218 [2021-10-28 23:24:10,685 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1717, Invalid=2839, Unknown=0, NotChecked=0, Total=4556 [2021-10-28 23:24:10,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-10-28 23:24:10,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-10-28 23:24:10,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.1612903225806452) internal successors, (252), 217 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:10,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 252 transitions. [2021-10-28 23:24:10,714 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 252 transitions. Word has length 199 [2021-10-28 23:24:10,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:24:10,714 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 252 transitions. [2021-10-28 23:24:10,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.527777777777778) internal successors, (199), 35 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:10,715 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 252 transitions. [2021-10-28 23:24:10,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-10-28 23:24:10,716 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:24:10,717 INFO L513 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2021-10-28 23:24:10,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-10-28 23:24:10,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-28 23:24:10,931 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:24:10,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:24:10,932 INFO L85 PathProgramCache]: Analyzing trace with hash -572276684, now seen corresponding path program 33 times [2021-10-28 23:24:10,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:24:10,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324327298] [2021-10-28 23:24:10,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:24:10,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:24:10,948 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:24:10,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397504122] [2021-10-28 23:24:10,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:24:10,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:24:10,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:24:10,951 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:24:10,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-28 23:24:13,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-10-28 23:24:13,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:24:13,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 69 conjunts are in the unsatisfiable core [2021-10-28 23:24:13,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:24:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3234 backedges. 0 proven. 3234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:24:14,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:24:14,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324327298] [2021-10-28 23:24:14,403 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:24:14,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397504122] [2021-10-28 23:24:14,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397504122] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:24:14,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:24:14,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-10-28 23:24:14,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194816638] [2021-10-28 23:24:14,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-28 23:24:14,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:24:14,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-28 23:24:14,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 23:24:14,406 INFO L87 Difference]: Start difference. First operand 218 states and 252 transitions. Second operand has 37 states, 37 states have (on average 5.54054054054054) internal successors, (205), 36 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:15,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:24:15,103 INFO L93 Difference]: Finished difference Result 228 states and 263 transitions. [2021-10-28 23:24:15,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-10-28 23:24:15,104 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.54054054054054) internal successors, (205), 36 states have internal predecessors, (205), 0 states have call successors, (0), 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 205 [2021-10-28 23:24:15,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:24:15,105 INFO L225 Difference]: With dead ends: 228 [2021-10-28 23:24:15,106 INFO L226 Difference]: Without dead ends: 224 [2021-10-28 23:24:15,107 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1820, Invalid=3010, Unknown=0, NotChecked=0, Total=4830 [2021-10-28 23:24:15,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-10-28 23:24:15,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2021-10-28 23:24:15,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.1614349775784754) internal successors, (259), 223 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:15,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 259 transitions. [2021-10-28 23:24:15,126 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 259 transitions. Word has length 205 [2021-10-28 23:24:15,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:24:15,126 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 259 transitions. [2021-10-28 23:24:15,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.54054054054054) internal successors, (205), 36 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:15,127 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 259 transitions. [2021-10-28 23:24:15,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-10-28 23:24:15,128 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:24:15,128 INFO L513 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2021-10-28 23:24:15,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-28 23:24:15,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-28 23:24:15,342 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:24:15,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:24:15,342 INFO L85 PathProgramCache]: Analyzing trace with hash -724408698, now seen corresponding path program 34 times [2021-10-28 23:24:15,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:24:15,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987749041] [2021-10-28 23:24:15,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:24:15,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:24:15,370 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:24:15,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627700050] [2021-10-28 23:24:15,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:24:15,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:24:15,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:24:15,371 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:24:15,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-28 23:24:16,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:24:16,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:24:16,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 71 conjunts are in the unsatisfiable core [2021-10-28 23:24:16,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:24:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 0 proven. 3434 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:24:17,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:24:17,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987749041] [2021-10-28 23:24:17,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:24:17,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627700050] [2021-10-28 23:24:17,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627700050] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:24:17,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:24:17,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2021-10-28 23:24:17,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928297968] [2021-10-28 23:24:17,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-28 23:24:17,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:24:17,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-28 23:24:17,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 23:24:17,897 INFO L87 Difference]: Start difference. First operand 224 states and 259 transitions. Second operand has 38 states, 38 states have (on average 5.552631578947368) internal successors, (211), 37 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:18,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:24:18,551 INFO L93 Difference]: Finished difference Result 234 states and 270 transitions. [2021-10-28 23:24:18,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-10-28 23:24:18,552 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.552631578947368) internal successors, (211), 37 states have internal predecessors, (211), 0 states have call successors, (0), 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 211 [2021-10-28 23:24:18,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:24:18,554 INFO L225 Difference]: With dead ends: 234 [2021-10-28 23:24:18,554 INFO L226 Difference]: Without dead ends: 230 [2021-10-28 23:24:18,555 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1926, Invalid=3186, Unknown=0, NotChecked=0, Total=5112 [2021-10-28 23:24:18,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-10-28 23:24:18,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2021-10-28 23:24:18,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.1615720524017468) internal successors, (266), 229 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:18,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 266 transitions. [2021-10-28 23:24:18,576 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 266 transitions. Word has length 211 [2021-10-28 23:24:18,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:24:18,576 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 266 transitions. [2021-10-28 23:24:18,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.552631578947368) internal successors, (211), 37 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:18,577 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 266 transitions. [2021-10-28 23:24:18,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-10-28 23:24:18,578 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:24:18,578 INFO L513 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2021-10-28 23:24:18,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-10-28 23:24:18,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-28 23:24:18,791 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:24:18,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:24:18,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1653897384, now seen corresponding path program 35 times [2021-10-28 23:24:18,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:24:18,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150956733] [2021-10-28 23:24:18,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:24:18,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:24:18,829 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:24:18,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903680914] [2021-10-28 23:24:18,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:24:18,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:24:18,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:24:18,831 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:24:18,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-28 23:24:21,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-10-28 23:24:21,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:24:21,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 73 conjunts are in the unsatisfiable core [2021-10-28 23:24:21,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:24:22,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3640 backedges. 0 proven. 3640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:24:22,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:24:22,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150956733] [2021-10-28 23:24:22,846 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:24:22,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903680914] [2021-10-28 23:24:22,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903680914] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:24:22,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:24:22,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-10-28 23:24:22,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628040561] [2021-10-28 23:24:22,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-28 23:24:22,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:24:22,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-28 23:24:22,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 23:24:22,848 INFO L87 Difference]: Start difference. First operand 230 states and 266 transitions. Second operand has 39 states, 39 states have (on average 5.564102564102564) internal successors, (217), 38 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:23,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:24:23,524 INFO L93 Difference]: Finished difference Result 240 states and 277 transitions. [2021-10-28 23:24:23,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-10-28 23:24:23,525 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.564102564102564) internal successors, (217), 38 states have internal predecessors, (217), 0 states have call successors, (0), 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 217 [2021-10-28 23:24:23,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:24:23,526 INFO L225 Difference]: With dead ends: 240 [2021-10-28 23:24:23,527 INFO L226 Difference]: Without dead ends: 236 [2021-10-28 23:24:23,527 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2035, Invalid=3367, Unknown=0, NotChecked=0, Total=5402 [2021-10-28 23:24:23,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-10-28 23:24:23,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-10-28 23:24:23,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.1617021276595745) internal successors, (273), 235 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:23,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 273 transitions. [2021-10-28 23:24:23,541 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 273 transitions. Word has length 217 [2021-10-28 23:24:23,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:24:23,541 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 273 transitions. [2021-10-28 23:24:23,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.564102564102564) internal successors, (217), 38 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:23,542 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 273 transitions. [2021-10-28 23:24:23,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-10-28 23:24:23,543 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:24:23,543 INFO L513 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2021-10-28 23:24:23,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-10-28 23:24:23,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:24:23,747 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:24:23,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:24:23,748 INFO L85 PathProgramCache]: Analyzing trace with hash -74890582, now seen corresponding path program 36 times [2021-10-28 23:24:23,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:24:23,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799019219] [2021-10-28 23:24:23,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:24:23,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:24:23,768 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:24:23,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [330632737] [2021-10-28 23:24:23,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:24:23,769 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:24:23,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:24:23,775 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:24:23,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-10-28 23:24:43,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-10-28 23:24:43,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:24:43,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 75 conjunts are in the unsatisfiable core [2021-10-28 23:24:43,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:24:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 0 proven. 3852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:24:44,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:24:44,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799019219] [2021-10-28 23:24:44,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:24:44,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330632737] [2021-10-28 23:24:44,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330632737] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:24:44,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:24:44,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-10-28 23:24:44,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198338095] [2021-10-28 23:24:44,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-28 23:24:44,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:24:44,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-28 23:24:44,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 23:24:44,235 INFO L87 Difference]: Start difference. First operand 236 states and 273 transitions. Second operand has 40 states, 40 states have (on average 5.575) internal successors, (223), 39 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:44,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:24:44,939 INFO L93 Difference]: Finished difference Result 246 states and 284 transitions. [2021-10-28 23:24:44,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-10-28 23:24:44,940 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.575) internal successors, (223), 39 states have internal predecessors, (223), 0 states have call successors, (0), 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 223 [2021-10-28 23:24:44,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:24:44,941 INFO L225 Difference]: With dead ends: 246 [2021-10-28 23:24:44,941 INFO L226 Difference]: Without dead ends: 242 [2021-10-28 23:24:44,942 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2147, Invalid=3553, Unknown=0, NotChecked=0, Total=5700 [2021-10-28 23:24:44,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-28 23:24:44,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2021-10-28 23:24:44,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.161825726141079) internal successors, (280), 241 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:44,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 280 transitions. [2021-10-28 23:24:44,964 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 280 transitions. Word has length 223 [2021-10-28 23:24:44,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:24:44,964 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 280 transitions. [2021-10-28 23:24:44,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 5.575) internal successors, (223), 39 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:44,965 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 280 transitions. [2021-10-28 23:24:44,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-10-28 23:24:44,966 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:24:44,967 INFO L513 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2021-10-28 23:24:44,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-10-28 23:24:45,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-10-28 23:24:45,175 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:24:45,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:24:45,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1360152452, now seen corresponding path program 37 times [2021-10-28 23:24:45,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:24:45,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511839757] [2021-10-28 23:24:45,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:24:45,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:24:45,212 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:24:45,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783292494] [2021-10-28 23:24:45,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:24:45,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:24:45,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:24:45,214 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:24:45,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-28 23:24:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:24:46,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 77 conjunts are in the unsatisfiable core [2021-10-28 23:24:46,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:24:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4070 backedges. 0 proven. 4070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:24:48,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:24:48,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511839757] [2021-10-28 23:24:48,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:24:48,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783292494] [2021-10-28 23:24:48,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783292494] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:24:48,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:24:48,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2021-10-28 23:24:48,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073817413] [2021-10-28 23:24:48,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-28 23:24:48,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:24:48,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-28 23:24:48,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 23:24:48,068 INFO L87 Difference]: Start difference. First operand 242 states and 280 transitions. Second operand has 41 states, 41 states have (on average 5.585365853658536) internal successors, (229), 40 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:48,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:24:48,814 INFO L93 Difference]: Finished difference Result 252 states and 291 transitions. [2021-10-28 23:24:48,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-10-28 23:24:48,814 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.585365853658536) internal successors, (229), 40 states have internal predecessors, (229), 0 states have call successors, (0), 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 229 [2021-10-28 23:24:48,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:24:48,816 INFO L225 Difference]: With dead ends: 252 [2021-10-28 23:24:48,816 INFO L226 Difference]: Without dead ends: 248 [2021-10-28 23:24:48,816 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2262, Invalid=3744, Unknown=0, NotChecked=0, Total=6006 [2021-10-28 23:24:48,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-10-28 23:24:48,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2021-10-28 23:24:48,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.1619433198380567) internal successors, (287), 247 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 287 transitions. [2021-10-28 23:24:48,833 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 287 transitions. Word has length 229 [2021-10-28 23:24:48,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:24:48,834 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 287 transitions. [2021-10-28 23:24:48,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.585365853658536) internal successors, (229), 40 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:48,834 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 287 transitions. [2021-10-28 23:24:48,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-10-28 23:24:48,835 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:24:48,836 INFO L513 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2021-10-28 23:24:48,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-10-28 23:24:49,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:24:49,064 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:24:49,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:24:49,064 INFO L85 PathProgramCache]: Analyzing trace with hash -448591666, now seen corresponding path program 38 times [2021-10-28 23:24:49,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:24:49,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899473188] [2021-10-28 23:24:49,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:24:49,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:24:49,099 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:24:49,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435848175] [2021-10-28 23:24:49,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:24:49,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:24:49,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:24:49,108 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:24:49,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-10-28 23:24:50,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:24:50,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:24:50,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 79 conjunts are in the unsatisfiable core [2021-10-28 23:24:50,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:24:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 0 proven. 4294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:24:52,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:24:52,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899473188] [2021-10-28 23:24:52,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:24:52,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435848175] [2021-10-28 23:24:52,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435848175] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:24:52,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:24:52,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-10-28 23:24:52,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966180936] [2021-10-28 23:24:52,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-28 23:24:52,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:24:52,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-28 23:24:52,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 23:24:52,032 INFO L87 Difference]: Start difference. First operand 248 states and 287 transitions. Second operand has 42 states, 42 states have (on average 5.595238095238095) internal successors, (235), 41 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:52,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:24:52,799 INFO L93 Difference]: Finished difference Result 258 states and 298 transitions. [2021-10-28 23:24:52,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-10-28 23:24:52,799 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 5.595238095238095) internal successors, (235), 41 states have internal predecessors, (235), 0 states have call successors, (0), 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 235 [2021-10-28 23:24:52,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:24:52,801 INFO L225 Difference]: With dead ends: 258 [2021-10-28 23:24:52,801 INFO L226 Difference]: Without dead ends: 254 [2021-10-28 23:24:52,802 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2380, Invalid=3940, Unknown=0, NotChecked=0, Total=6320 [2021-10-28 23:24:52,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-10-28 23:24:52,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-10-28 23:24:52,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.1620553359683794) internal successors, (294), 253 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:52,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 294 transitions. [2021-10-28 23:24:52,818 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 294 transitions. Word has length 235 [2021-10-28 23:24:52,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:24:52,818 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 294 transitions. [2021-10-28 23:24:52,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.595238095238095) internal successors, (235), 41 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:24:52,819 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 294 transitions. [2021-10-28 23:24:52,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-10-28 23:24:52,820 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:24:52,820 INFO L513 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2021-10-28 23:24:52,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-10-28 23:24:53,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:24:53,020 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:24:53,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:24:53,021 INFO L85 PathProgramCache]: Analyzing trace with hash 739988384, now seen corresponding path program 39 times [2021-10-28 23:24:53,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:24:53,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165079057] [2021-10-28 23:24:53,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:24:53,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:24:53,037 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:24:53,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950542358] [2021-10-28 23:24:53,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:24:53,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:24:53,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:24:53,038 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:24:53,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-10-28 23:24:59,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-10-28 23:24:59,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:24:59,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 81 conjunts are in the unsatisfiable core [2021-10-28 23:24:59,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4524 backedges. 0 proven. 4524 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:00,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:00,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165079057] [2021-10-28 23:25:00,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:00,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950542358] [2021-10-28 23:25:00,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950542358] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:00,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:00,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2021-10-28 23:25:00,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054670472] [2021-10-28 23:25:00,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-28 23:25:00,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:00,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-28 23:25:00,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-10-28 23:25:00,569 INFO L87 Difference]: Start difference. First operand 254 states and 294 transitions. Second operand has 43 states, 43 states have (on average 5.604651162790698) internal successors, (241), 42 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:01,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:01,361 INFO L93 Difference]: Finished difference Result 264 states and 305 transitions. [2021-10-28 23:25:01,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-10-28 23:25:01,361 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.604651162790698) internal successors, (241), 42 states have internal predecessors, (241), 0 states have call successors, (0), 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 241 [2021-10-28 23:25:01,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:01,363 INFO L225 Difference]: With dead ends: 264 [2021-10-28 23:25:01,363 INFO L226 Difference]: Without dead ends: 260 [2021-10-28 23:25:01,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2501, Invalid=4141, Unknown=0, NotChecked=0, Total=6642 [2021-10-28 23:25:01,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-10-28 23:25:01,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2021-10-28 23:25:01,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.162162162162162) internal successors, (301), 259 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:01,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 301 transitions. [2021-10-28 23:25:01,387 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 301 transitions. Word has length 241 [2021-10-28 23:25:01,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:01,387 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 301 transitions. [2021-10-28 23:25:01,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.604651162790698) internal successors, (241), 42 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 301 transitions. [2021-10-28 23:25:01,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-10-28 23:25:01,389 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:01,389 INFO L513 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:01,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:01,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-10-28 23:25:01,608 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:25:01,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:01,608 INFO L85 PathProgramCache]: Analyzing trace with hash -487540494, now seen corresponding path program 40 times [2021-10-28 23:25:01,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:01,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535825611] [2021-10-28 23:25:01,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:01,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:01,645 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:01,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304865501] [2021-10-28 23:25:01,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:25:01,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:01,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:01,646 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:01,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-10-28 23:25:03,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:25:03,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:03,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 83 conjunts are in the unsatisfiable core [2021-10-28 23:25:03,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 0 proven. 4760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:04,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:04,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535825611] [2021-10-28 23:25:04,870 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:04,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304865501] [2021-10-28 23:25:04,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304865501] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:04,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:04,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2021-10-28 23:25:04,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218829544] [2021-10-28 23:25:04,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-28 23:25:04,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:04,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-28 23:25:04,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 23:25:04,886 INFO L87 Difference]: Start difference. First operand 260 states and 301 transitions. Second operand has 44 states, 44 states have (on average 5.613636363636363) internal successors, (247), 43 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:05,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:05,723 INFO L93 Difference]: Finished difference Result 270 states and 312 transitions. [2021-10-28 23:25:05,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-10-28 23:25:05,732 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 5.613636363636363) internal successors, (247), 43 states have internal predecessors, (247), 0 states have call successors, (0), 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 247 [2021-10-28 23:25:05,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:05,734 INFO L225 Difference]: With dead ends: 270 [2021-10-28 23:25:05,734 INFO L226 Difference]: Without dead ends: 266 [2021-10-28 23:25:05,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2625, Invalid=4347, Unknown=0, NotChecked=0, Total=6972 [2021-10-28 23:25:05,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-10-28 23:25:05,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2021-10-28 23:25:05,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 1.1622641509433962) internal successors, (308), 265 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:05,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 308 transitions. [2021-10-28 23:25:05,758 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 308 transitions. Word has length 247 [2021-10-28 23:25:05,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:05,758 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 308 transitions. [2021-10-28 23:25:05,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.613636363636363) internal successors, (247), 43 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:05,759 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 308 transitions. [2021-10-28 23:25:05,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-10-28 23:25:05,760 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:05,761 INFO L513 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:05,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:05,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-10-28 23:25:05,975 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:25:05,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:05,976 INFO L85 PathProgramCache]: Analyzing trace with hash 757422276, now seen corresponding path program 41 times [2021-10-28 23:25:05,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:05,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411821665] [2021-10-28 23:25:05,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:05,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:06,007 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:06,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847817408] [2021-10-28 23:25:06,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:25:06,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:06,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:06,010 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:06,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-10-28 23:25:45,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-10-28 23:25:45,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:45,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 85 conjunts are in the unsatisfiable core [2021-10-28 23:25:45,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:47,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5002 backedges. 0 proven. 5002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:47,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:47,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411821665] [2021-10-28 23:25:47,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:47,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847817408] [2021-10-28 23:25:47,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847817408] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:47,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:47,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2021-10-28 23:25:47,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186481672] [2021-10-28 23:25:47,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-28 23:25:47,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:47,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-28 23:25:47,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-10-28 23:25:47,339 INFO L87 Difference]: Start difference. First operand 266 states and 308 transitions. Second operand has 45 states, 45 states have (on average 5.622222222222222) internal successors, (253), 44 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:48,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:48,204 INFO L93 Difference]: Finished difference Result 276 states and 319 transitions. [2021-10-28 23:25:48,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-10-28 23:25:48,204 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 5.622222222222222) internal successors, (253), 44 states have internal predecessors, (253), 0 states have call successors, (0), 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 253 [2021-10-28 23:25:48,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:48,205 INFO L225 Difference]: With dead ends: 276 [2021-10-28 23:25:48,205 INFO L226 Difference]: Without dead ends: 272 [2021-10-28 23:25:48,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2752, Invalid=4558, Unknown=0, NotChecked=0, Total=7310 [2021-10-28 23:25:48,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-10-28 23:25:48,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2021-10-28 23:25:48,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.1623616236162362) internal successors, (315), 271 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:48,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 315 transitions. [2021-10-28 23:25:48,225 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 315 transitions. Word has length 253 [2021-10-28 23:25:48,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:48,225 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 315 transitions. [2021-10-28 23:25:48,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.622222222222222) internal successors, (253), 44 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:48,226 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 315 transitions. [2021-10-28 23:25:48,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-10-28 23:25:48,227 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:48,228 INFO L513 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:48,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-10-28 23:25:48,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-10-28 23:25:48,451 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:25:48,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:48,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1677939478, now seen corresponding path program 42 times [2021-10-28 23:25:48,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:48,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093572953] [2021-10-28 23:25:48,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:48,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:48,469 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:48,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101791992] [2021-10-28 23:25:48,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:25:48,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:48,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:48,473 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:48,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-10-28 23:26:24,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-10-28 23:26:24,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:26:24,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 87 conjunts are in the unsatisfiable core [2021-10-28 23:26:24,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:26:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5250 backedges. 0 proven. 5250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:25,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:25,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093572953] [2021-10-28 23:26:25,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:26:25,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101791992] [2021-10-28 23:26:25,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101791992] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:26:25,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:26:25,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2021-10-28 23:26:25,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131408964] [2021-10-28 23:26:25,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-28 23:26:25,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:25,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-28 23:26:25,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-10-28 23:26:25,607 INFO L87 Difference]: Start difference. First operand 272 states and 315 transitions. Second operand has 46 states, 46 states have (on average 5.630434782608695) internal successors, (259), 45 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:26:26,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:26,478 INFO L93 Difference]: Finished difference Result 282 states and 326 transitions. [2021-10-28 23:26:26,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-10-28 23:26:26,479 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 5.630434782608695) internal successors, (259), 45 states have internal predecessors, (259), 0 states have call successors, (0), 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 259 [2021-10-28 23:26:26,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:26,480 INFO L225 Difference]: With dead ends: 282 [2021-10-28 23:26:26,480 INFO L226 Difference]: Without dead ends: 278 [2021-10-28 23:26:26,480 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2882, Invalid=4774, Unknown=0, NotChecked=0, Total=7656 [2021-10-28 23:26:26,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-10-28 23:26:26,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2021-10-28 23:26:26,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 1.1624548736462095) internal successors, (322), 277 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:26:26,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 322 transitions. [2021-10-28 23:26:26,499 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 322 transitions. Word has length 259 [2021-10-28 23:26:26,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:26,499 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 322 transitions. [2021-10-28 23:26:26,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 5.630434782608695) internal successors, (259), 45 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:26:26,500 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 322 transitions. [2021-10-28 23:26:26,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-10-28 23:26:26,501 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:26,502 INFO L513 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:26,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-10-28 23:26:26,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-10-28 23:26:26,723 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:26:26,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:26,723 INFO L85 PathProgramCache]: Analyzing trace with hash 146589672, now seen corresponding path program 43 times [2021-10-28 23:26:26,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:26,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200348251] [2021-10-28 23:26:26,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:26,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:26,757 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:26:26,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511257661] [2021-10-28 23:26:26,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:26:26,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:26:26,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:26:26,758 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:26:26,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-10-28 23:26:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:28,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 1009 conjuncts, 89 conjunts are in the unsatisfiable core [2021-10-28 23:26:28,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:26:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5504 backedges. 0 proven. 5504 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:30,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:30,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200348251] [2021-10-28 23:26:30,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:26:30,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511257661] [2021-10-28 23:26:30,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511257661] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:26:30,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:26:30,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2021-10-28 23:26:30,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908074553] [2021-10-28 23:26:30,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-10-28 23:26:30,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:30,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-10-28 23:26:30,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-10-28 23:26:30,428 INFO L87 Difference]: Start difference. First operand 278 states and 322 transitions. Second operand has 47 states, 47 states have (on average 5.638297872340425) internal successors, (265), 46 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:26:31,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:31,384 INFO L93 Difference]: Finished difference Result 288 states and 333 transitions. [2021-10-28 23:26:31,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-10-28 23:26:31,385 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 5.638297872340425) internal successors, (265), 46 states have internal predecessors, (265), 0 states have call successors, (0), 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 265 [2021-10-28 23:26:31,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:31,386 INFO L225 Difference]: With dead ends: 288 [2021-10-28 23:26:31,386 INFO L226 Difference]: Without dead ends: 284 [2021-10-28 23:26:31,387 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3015, Invalid=4995, Unknown=0, NotChecked=0, Total=8010 [2021-10-28 23:26:31,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-10-28 23:26:31,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2021-10-28 23:26:31,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.1625441696113075) internal successors, (329), 283 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:26:31,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 329 transitions. [2021-10-28 23:26:31,412 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 329 transitions. Word has length 265 [2021-10-28 23:26:31,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:31,412 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 329 transitions. [2021-10-28 23:26:31,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 5.638297872340425) internal successors, (265), 46 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:26:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 329 transitions. [2021-10-28 23:26:31,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-10-28 23:26:31,414 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:31,414 INFO L513 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:31,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-10-28 23:26:31,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-10-28 23:26:31,627 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:26:31,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:31,628 INFO L85 PathProgramCache]: Analyzing trace with hash 913037114, now seen corresponding path program 44 times [2021-10-28 23:26:31,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:31,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14419170] [2021-10-28 23:26:31,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:31,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:31,702 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:26:31,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690242895] [2021-10-28 23:26:31,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:26:31,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:26:31,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:26:31,723 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:26:31,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-10-28 23:26:33,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:26:33,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:26:33,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 91 conjunts are in the unsatisfiable core [2021-10-28 23:26:33,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:26:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5764 backedges. 0 proven. 5764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:35,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:35,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14419170] [2021-10-28 23:26:35,505 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:26:35,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690242895] [2021-10-28 23:26:35,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690242895] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:26:35,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:26:35,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2021-10-28 23:26:35,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157025108] [2021-10-28 23:26:35,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-28 23:26:35,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:35,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-28 23:26:35,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 23:26:35,507 INFO L87 Difference]: Start difference. First operand 284 states and 329 transitions. Second operand has 48 states, 48 states have (on average 5.645833333333333) internal successors, (271), 47 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:26:36,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:36,603 INFO L93 Difference]: Finished difference Result 294 states and 340 transitions. [2021-10-28 23:26:36,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-10-28 23:26:36,604 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 5.645833333333333) internal successors, (271), 47 states have internal predecessors, (271), 0 states have call successors, (0), 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 271 [2021-10-28 23:26:36,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:36,605 INFO L225 Difference]: With dead ends: 294 [2021-10-28 23:26:36,605 INFO L226 Difference]: Without dead ends: 290 [2021-10-28 23:26:36,606 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3151, Invalid=5221, Unknown=0, NotChecked=0, Total=8372 [2021-10-28 23:26:36,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-10-28 23:26:36,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2021-10-28 23:26:36,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.1626297577854672) internal successors, (336), 289 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:26:36,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 336 transitions. [2021-10-28 23:26:36,653 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 336 transitions. Word has length 271 [2021-10-28 23:26:36,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:36,654 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 336 transitions. [2021-10-28 23:26:36,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 5.645833333333333) internal successors, (271), 47 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:26:36,654 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 336 transitions. [2021-10-28 23:26:36,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-10-28 23:26:36,656 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:36,657 INFO L513 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:36,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-10-28 23:26:36,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-10-28 23:26:36,875 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:26:36,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:36,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1810718452, now seen corresponding path program 45 times [2021-10-28 23:26:36,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:36,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886401461] [2021-10-28 23:26:36,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:36,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:36,914 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:26:36,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4454127] [2021-10-28 23:26:36,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:26:36,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:26:36,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:26:36,920 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:26:36,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-10-28 23:26:51,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-10-28 23:26:51,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:26:51,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 93 conjunts are in the unsatisfiable core [2021-10-28 23:26:51,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:26:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6030 backedges. 0 proven. 6030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:53,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:53,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886401461] [2021-10-28 23:26:53,349 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:26:53,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4454127] [2021-10-28 23:26:53,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4454127] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:26:53,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:26:53,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2021-10-28 23:26:53,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420074985] [2021-10-28 23:26:53,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-28 23:26:53,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:53,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-28 23:26:53,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 23:26:53,351 INFO L87 Difference]: Start difference. First operand 290 states and 336 transitions. Second operand has 49 states, 49 states have (on average 5.653061224489796) internal successors, (277), 48 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:26:54,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:54,452 INFO L93 Difference]: Finished difference Result 300 states and 347 transitions. [2021-10-28 23:26:54,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-10-28 23:26:54,452 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 5.653061224489796) internal successors, (277), 48 states have internal predecessors, (277), 0 states have call successors, (0), 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 277 [2021-10-28 23:26:54,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:54,454 INFO L225 Difference]: With dead ends: 300 [2021-10-28 23:26:54,454 INFO L226 Difference]: Without dead ends: 296 [2021-10-28 23:26:54,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3290, Invalid=5452, Unknown=0, NotChecked=0, Total=8742 [2021-10-28 23:26:54,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-10-28 23:26:54,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2021-10-28 23:26:54,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.1627118644067798) internal successors, (343), 295 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:26:54,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 343 transitions. [2021-10-28 23:26:54,479 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 343 transitions. Word has length 277 [2021-10-28 23:26:54,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:54,479 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 343 transitions. [2021-10-28 23:26:54,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 5.653061224489796) internal successors, (277), 48 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:26:54,480 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 343 transitions. [2021-10-28 23:26:54,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-10-28 23:26:54,482 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:54,482 INFO L513 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:54,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-10-28 23:26:54,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-10-28 23:26:54,700 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:26:54,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:54,700 INFO L85 PathProgramCache]: Analyzing trace with hash -962902690, now seen corresponding path program 46 times [2021-10-28 23:26:54,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:54,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702291748] [2021-10-28 23:26:54,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:54,700 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:54,721 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:26:54,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484595219] [2021-10-28 23:26:54,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:26:54,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:26:54,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:26:54,723 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:26:54,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-10-28 23:26:57,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:26:57,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:26:57,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 95 conjunts are in the unsatisfiable core [2021-10-28 23:26:57,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:26:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6302 backedges. 0 proven. 6302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:58,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:58,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702291748] [2021-10-28 23:26:58,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:26:58,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484595219] [2021-10-28 23:26:58,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484595219] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:26:58,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:26:58,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2021-10-28 23:26:58,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208642824] [2021-10-28 23:26:58,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-10-28 23:26:58,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:58,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-10-28 23:26:58,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 23:26:58,726 INFO L87 Difference]: Start difference. First operand 296 states and 343 transitions. Second operand has 50 states, 50 states have (on average 5.66) internal successors, (283), 49 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:26:59,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:59,867 INFO L93 Difference]: Finished difference Result 306 states and 354 transitions. [2021-10-28 23:26:59,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-10-28 23:26:59,867 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.66) internal successors, (283), 49 states have internal predecessors, (283), 0 states have call successors, (0), 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 283 [2021-10-28 23:26:59,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:59,869 INFO L225 Difference]: With dead ends: 306 [2021-10-28 23:26:59,869 INFO L226 Difference]: Without dead ends: 302 [2021-10-28 23:26:59,870 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3432, Invalid=5688, Unknown=0, NotChecked=0, Total=9120 [2021-10-28 23:26:59,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-10-28 23:26:59,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2021-10-28 23:26:59,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 1.1627906976744187) internal successors, (350), 301 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:26:59,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 350 transitions. [2021-10-28 23:26:59,895 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 350 transitions. Word has length 283 [2021-10-28 23:26:59,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:59,896 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 350 transitions. [2021-10-28 23:26:59,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.66) internal successors, (283), 49 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:26:59,896 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 350 transitions. [2021-10-28 23:26:59,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-10-28 23:26:59,898 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:59,898 INFO L513 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:59,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:00,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:00,116 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:27:00,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:00,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1658315824, now seen corresponding path program 47 times [2021-10-28 23:27:00,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:00,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531327324] [2021-10-28 23:27:00,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:00,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:00,138 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:27:00,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [356958655] [2021-10-28 23:27:00,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:27:00,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:00,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:00,144 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:27:00,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-10-28 23:27:56,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-10-28 23:27:56,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:27:56,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 97 conjunts are in the unsatisfiable core [2021-10-28 23:27:56,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 0 proven. 6580 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:27:58,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:58,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531327324] [2021-10-28 23:27:58,272 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:27:58,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356958655] [2021-10-28 23:27:58,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356958655] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:58,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:27:58,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2021-10-28 23:27:58,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047175012] [2021-10-28 23:27:58,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-28 23:27:58,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:58,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-28 23:27:58,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 23:27:58,275 INFO L87 Difference]: Start difference. First operand 302 states and 350 transitions. Second operand has 51 states, 51 states have (on average 5.666666666666667) internal successors, (289), 50 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:27:59,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:59,454 INFO L93 Difference]: Finished difference Result 312 states and 361 transitions. [2021-10-28 23:27:59,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-10-28 23:27:59,454 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 5.666666666666667) internal successors, (289), 50 states have internal predecessors, (289), 0 states have call successors, (0), 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 289 [2021-10-28 23:27:59,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:59,456 INFO L225 Difference]: With dead ends: 312 [2021-10-28 23:27:59,456 INFO L226 Difference]: Without dead ends: 308 [2021-10-28 23:27:59,457 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3577, Invalid=5929, Unknown=0, NotChecked=0, Total=9506 [2021-10-28 23:27:59,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-10-28 23:27:59,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2021-10-28 23:27:59,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.1628664495114007) internal successors, (357), 307 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:27:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 357 transitions. [2021-10-28 23:27:59,474 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 357 transitions. Word has length 289 [2021-10-28 23:27:59,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:59,474 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 357 transitions. [2021-10-28 23:27:59,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.666666666666667) internal successors, (289), 50 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:27:59,474 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 357 transitions. [2021-10-28 23:27:59,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-10-28 23:27:59,475 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:59,476 INFO L513 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:59,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:59,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:59,691 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:27:59,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:59,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1602395522, now seen corresponding path program 48 times [2021-10-28 23:27:59,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:59,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402846180] [2021-10-28 23:27:59,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:59,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:59,714 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:27:59,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300191619] [2021-10-28 23:27:59,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:27:59,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:59,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:59,716 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:27:59,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-10-28 23:29:52,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-10-28 23:29:52,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:29:52,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 99 conjunts are in the unsatisfiable core [2021-10-28 23:29:52,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6864 backedges. 0 proven. 6864 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:29:53,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:29:53,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402846180] [2021-10-28 23:29:53,899 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:29:53,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300191619] [2021-10-28 23:29:53,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300191619] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:53,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:29:53,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2021-10-28 23:29:53,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515109424] [2021-10-28 23:29:53,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-28 23:29:53,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:29:53,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-28 23:29:53,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 23:29:53,902 INFO L87 Difference]: Start difference. First operand 308 states and 357 transitions. Second operand has 52 states, 52 states have (on average 5.673076923076923) internal successors, (295), 51 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:29:55,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:55,086 INFO L93 Difference]: Finished difference Result 318 states and 368 transitions. [2021-10-28 23:29:55,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-10-28 23:29:55,087 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 5.673076923076923) internal successors, (295), 51 states have internal predecessors, (295), 0 states have call successors, (0), 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 295 [2021-10-28 23:29:55,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:55,089 INFO L225 Difference]: With dead ends: 318 [2021-10-28 23:29:55,089 INFO L226 Difference]: Without dead ends: 314 [2021-10-28 23:29:55,090 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3725, Invalid=6175, Unknown=0, NotChecked=0, Total=9900 [2021-10-28 23:29:55,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-10-28 23:29:55,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 314. [2021-10-28 23:29:55,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 1.1629392971246006) internal successors, (364), 313 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:29:55,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 364 transitions. [2021-10-28 23:29:55,141 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 364 transitions. Word has length 295 [2021-10-28 23:29:55,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:55,141 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 364 transitions. [2021-10-28 23:29:55,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 5.673076923076923) internal successors, (295), 51 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:29:55,156 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 364 transitions. [2021-10-28 23:29:55,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-10-28 23:29:55,171 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:55,172 INFO L513 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:55,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-10-28 23:29:55,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-10-28 23:29:55,391 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:29:55,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:55,392 INFO L85 PathProgramCache]: Analyzing trace with hash 121475412, now seen corresponding path program 49 times [2021-10-28 23:29:55,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:29:55,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769654306] [2021-10-28 23:29:55,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:55,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:29:55,432 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:29:55,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344797332] [2021-10-28 23:29:55,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:29:55,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:55,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:29:55,436 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:29:55,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-10-28 23:29:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:29:58,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 1141 conjuncts, 101 conjunts are in the unsatisfiable core [2021-10-28 23:29:58,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:30:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7154 backedges. 0 proven. 7154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:30:00,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:30:00,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769654306] [2021-10-28 23:30:00,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:30:00,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344797332] [2021-10-28 23:30:00,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344797332] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:30:00,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:30:00,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2021-10-28 23:30:00,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376307079] [2021-10-28 23:30:00,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-10-28 23:30:00,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:30:00,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-10-28 23:30:00,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-10-28 23:30:00,376 INFO L87 Difference]: Start difference. First operand 314 states and 364 transitions. Second operand has 53 states, 53 states have (on average 5.679245283018868) internal successors, (301), 52 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:30:01,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:30:01,668 INFO L93 Difference]: Finished difference Result 324 states and 375 transitions. [2021-10-28 23:30:01,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-10-28 23:30:01,668 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 5.679245283018868) internal successors, (301), 52 states have internal predecessors, (301), 0 states have call successors, (0), 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 301 [2021-10-28 23:30:01,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:30:01,670 INFO L225 Difference]: With dead ends: 324 [2021-10-28 23:30:01,670 INFO L226 Difference]: Without dead ends: 320 [2021-10-28 23:30:01,671 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3876, Invalid=6426, Unknown=0, NotChecked=0, Total=10302 [2021-10-28 23:30:01,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-10-28 23:30:01,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2021-10-28 23:30:01,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.1630094043887147) internal successors, (371), 319 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:30:01,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 371 transitions. [2021-10-28 23:30:01,688 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 371 transitions. Word has length 301 [2021-10-28 23:30:01,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:30:01,689 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 371 transitions. [2021-10-28 23:30:01,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 5.679245283018868) internal successors, (301), 52 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:30:01,689 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 371 transitions. [2021-10-28 23:30:01,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2021-10-28 23:30:01,691 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:30:01,691 INFO L513 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2021-10-28 23:30:01,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-10-28 23:30:01,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:30:01,919 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:30:01,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:30:01,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1788010406, now seen corresponding path program 50 times [2021-10-28 23:30:01,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:30:01,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242259565] [2021-10-28 23:30:01,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:30:01,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:30:01,943 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:30:01,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040332170] [2021-10-28 23:30:01,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:30:01,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:30:01,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:30:01,945 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:30:01,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-10-28 23:30:04,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:30:04,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-28 23:30:04,984 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:30:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:30:05,494 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:30:05,495 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 23:30:05,496 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:30:05,498 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:30:05,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-10-28 23:30:05,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:30:05,719 INFO L731 BasicCegarLoop]: Path program histogram: [50, 3, 3, 3, 3, 2, 1, 1] [2021-10-28 23:30:05,723 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:30:06,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:30:06 BoogieIcfgContainer [2021-10-28 23:30:06,004 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:30:06,005 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:30:06,005 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:30:06,006 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:30:06,006 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:22:04" (3/4) ... [2021-10-28 23:30:06,008 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 23:30:06,245 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:30:06,246 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:30:06,249 INFO L168 Benchmark]: Toolchain (without parser) took 482742.50 ms. Allocated memory was 100.7 MB in the beginning and 765.5 MB in the end (delta: 664.8 MB). Free memory was 67.8 MB in the beginning and 310.9 MB in the end (delta: -243.0 MB). Peak memory consumption was 422.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:30:06,249 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 100.7 MB. Free memory is still 55.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:30:06,251 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.57 ms. Allocated memory was 100.7 MB in the beginning and 125.8 MB in the end (delta: 25.2 MB). Free memory was 67.5 MB in the beginning and 101.6 MB in the end (delta: -34.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:30:06,251 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.49 ms. Allocated memory is still 125.8 MB. Free memory was 101.6 MB in the beginning and 100.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:30:06,252 INFO L168 Benchmark]: Boogie Preprocessor took 26.68 ms. Allocated memory is still 125.8 MB. Free memory was 100.2 MB in the beginning and 98.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:30:06,252 INFO L168 Benchmark]: RCFGBuilder took 353.68 ms. Allocated memory is still 125.8 MB. Free memory was 98.8 MB in the beginning and 89.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:30:06,253 INFO L168 Benchmark]: TraceAbstraction took 481772.59 ms. Allocated memory was 125.8 MB in the beginning and 765.5 MB in the end (delta: 639.6 MB). Free memory was 88.3 MB in the beginning and 333.9 MB in the end (delta: -245.6 MB). Peak memory consumption was 395.7 MB. Max. memory is 16.1 GB. [2021-10-28 23:30:06,253 INFO L168 Benchmark]: Witness Printer took 241.60 ms. Allocated memory is still 765.5 MB. Free memory was 333.9 MB in the beginning and 310.9 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:30:06,256 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 100.7 MB. Free memory is still 55.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 297.57 ms. Allocated memory was 100.7 MB in the beginning and 125.8 MB in the end (delta: 25.2 MB). Free memory was 67.5 MB in the beginning and 101.6 MB in the end (delta: -34.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.49 ms. Allocated memory is still 125.8 MB. Free memory was 101.6 MB in the beginning and 100.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.68 ms. Allocated memory is still 125.8 MB. Free memory was 100.2 MB in the beginning and 98.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 353.68 ms. Allocated memory is still 125.8 MB. Free memory was 98.8 MB in the beginning and 89.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 481772.59 ms. Allocated memory was 125.8 MB in the beginning and 765.5 MB in the end (delta: 639.6 MB). Free memory was 88.3 MB in the beginning and 333.9 MB in the end (delta: -245.6 MB). Peak memory consumption was 395.7 MB. Max. memory is 16.1 GB. * Witness Printer took 241.60 ms. Allocated memory is still 765.5 MB. Free memory was 333.9 MB in the beginning and 310.9 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] int counter = 0; VAL [counter=0] [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 VAL [counter=0] [L31] EXPR counter++ VAL [counter=1] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=1] [L35] COND FALSE !(!(x <= X)) VAL [counter=1] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=1] [L45] x++ VAL [counter=1] [L31] EXPR counter++ VAL [counter=2] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=2] [L35] COND FALSE !(!(x <= X)) VAL [counter=2] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=2] [L45] x++ VAL [counter=2] [L31] EXPR counter++ VAL [counter=3] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=3] [L35] COND FALSE !(!(x <= X)) VAL [counter=3] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=3] [L45] x++ VAL [counter=3] [L31] EXPR counter++ VAL [counter=4] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=4] [L35] COND FALSE !(!(x <= X)) VAL [counter=4] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=4] [L45] x++ VAL [counter=4] [L31] EXPR counter++ VAL [counter=5] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=5] [L35] COND FALSE !(!(x <= X)) VAL [counter=5] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=5] [L45] x++ VAL [counter=5] [L31] EXPR counter++ VAL [counter=6] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=6] [L35] COND FALSE !(!(x <= X)) VAL [counter=6] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=6] [L45] x++ VAL [counter=6] [L31] EXPR counter++ VAL [counter=7] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=7] [L35] COND FALSE !(!(x <= X)) VAL [counter=7] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=7] [L45] x++ VAL [counter=7] [L31] EXPR counter++ VAL [counter=8] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=8] [L35] COND FALSE !(!(x <= X)) VAL [counter=8] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=8] [L45] x++ VAL [counter=8] [L31] EXPR counter++ VAL [counter=9] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=9] [L35] COND FALSE !(!(x <= X)) VAL [counter=9] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=9] [L45] x++ VAL [counter=9] [L31] EXPR counter++ VAL [counter=10] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=10] [L35] COND FALSE !(!(x <= X)) VAL [counter=10] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=10] [L45] x++ VAL [counter=10] [L31] EXPR counter++ VAL [counter=11] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=11] [L35] COND FALSE !(!(x <= X)) VAL [counter=11] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=11] [L45] x++ VAL [counter=11] [L31] EXPR counter++ VAL [counter=12] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=12] [L35] COND FALSE !(!(x <= X)) VAL [counter=12] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=12] [L45] x++ VAL [counter=12] [L31] EXPR counter++ VAL [counter=13] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=13] [L35] COND FALSE !(!(x <= X)) VAL [counter=13] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=13] [L45] x++ VAL [counter=13] [L31] EXPR counter++ VAL [counter=14] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=14] [L35] COND FALSE !(!(x <= X)) VAL [counter=14] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=14] [L45] x++ VAL [counter=14] [L31] EXPR counter++ VAL [counter=15] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=15] [L35] COND FALSE !(!(x <= X)) VAL [counter=15] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=15] [L45] x++ VAL [counter=15] [L31] EXPR counter++ VAL [counter=16] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=16] [L35] COND FALSE !(!(x <= X)) VAL [counter=16] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=16] [L45] x++ VAL [counter=16] [L31] EXPR counter++ VAL [counter=17] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=17] [L35] COND FALSE !(!(x <= X)) VAL [counter=17] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=17] [L45] x++ VAL [counter=17] [L31] EXPR counter++ VAL [counter=18] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=18] [L35] COND FALSE !(!(x <= X)) VAL [counter=18] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=18] [L45] x++ VAL [counter=18] [L31] EXPR counter++ VAL [counter=19] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=19] [L35] COND FALSE !(!(x <= X)) VAL [counter=19] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=19] [L45] x++ VAL [counter=19] [L31] EXPR counter++ VAL [counter=20] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=20] [L35] COND FALSE !(!(x <= X)) VAL [counter=20] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=20] [L45] x++ VAL [counter=20] [L31] EXPR counter++ VAL [counter=21] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=21] [L35] COND FALSE !(!(x <= X)) VAL [counter=21] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=21] [L45] x++ VAL [counter=21] [L31] EXPR counter++ VAL [counter=22] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=22] [L35] COND FALSE !(!(x <= X)) VAL [counter=22] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=22] [L45] x++ VAL [counter=22] [L31] EXPR counter++ VAL [counter=23] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=23] [L35] COND FALSE !(!(x <= X)) VAL [counter=23] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=23] [L45] x++ VAL [counter=23] [L31] EXPR counter++ VAL [counter=24] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=24] [L35] COND FALSE !(!(x <= X)) VAL [counter=24] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=24] [L45] x++ VAL [counter=24] [L31] EXPR counter++ VAL [counter=25] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=25] [L35] COND FALSE !(!(x <= X)) VAL [counter=25] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=25] [L45] x++ VAL [counter=25] [L31] EXPR counter++ VAL [counter=26] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=26] [L35] COND FALSE !(!(x <= X)) VAL [counter=26] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=26] [L45] x++ VAL [counter=26] [L31] EXPR counter++ VAL [counter=27] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=27] [L35] COND FALSE !(!(x <= X)) VAL [counter=27] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=27] [L45] x++ VAL [counter=27] [L31] EXPR counter++ VAL [counter=28] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=28] [L35] COND FALSE !(!(x <= X)) VAL [counter=28] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=28] [L45] x++ VAL [counter=28] [L31] EXPR counter++ VAL [counter=29] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=29] [L35] COND FALSE !(!(x <= X)) VAL [counter=29] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=29] [L45] x++ VAL [counter=29] [L31] EXPR counter++ VAL [counter=30] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=30] [L35] COND FALSE !(!(x <= X)) VAL [counter=30] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=30] [L45] x++ VAL [counter=30] [L31] EXPR counter++ VAL [counter=31] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=31] [L35] COND FALSE !(!(x <= X)) VAL [counter=31] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=31] [L45] x++ VAL [counter=31] [L31] EXPR counter++ VAL [counter=32] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=32] [L35] COND FALSE !(!(x <= X)) VAL [counter=32] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=32] [L45] x++ VAL [counter=32] [L31] EXPR counter++ VAL [counter=33] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=33] [L35] COND FALSE !(!(x <= X)) VAL [counter=33] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=33] [L45] x++ VAL [counter=33] [L31] EXPR counter++ VAL [counter=34] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=34] [L35] COND FALSE !(!(x <= X)) VAL [counter=34] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=34] [L45] x++ VAL [counter=34] [L31] EXPR counter++ VAL [counter=35] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=35] [L35] COND FALSE !(!(x <= X)) VAL [counter=35] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=35] [L45] x++ VAL [counter=35] [L31] EXPR counter++ VAL [counter=36] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=36] [L35] COND FALSE !(!(x <= X)) VAL [counter=36] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=36] [L45] x++ VAL [counter=36] [L31] EXPR counter++ VAL [counter=37] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=37] [L35] COND FALSE !(!(x <= X)) VAL [counter=37] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=37] [L45] x++ VAL [counter=37] [L31] EXPR counter++ VAL [counter=38] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=38] [L35] COND FALSE !(!(x <= X)) VAL [counter=38] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=38] [L45] x++ VAL [counter=38] [L31] EXPR counter++ VAL [counter=39] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=39] [L35] COND FALSE !(!(x <= X)) VAL [counter=39] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=39] [L45] x++ VAL [counter=39] [L31] EXPR counter++ VAL [counter=40] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=40] [L35] COND FALSE !(!(x <= X)) VAL [counter=40] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=40] [L45] x++ VAL [counter=40] [L31] EXPR counter++ VAL [counter=41] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=41] [L35] COND FALSE !(!(x <= X)) VAL [counter=41] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=41] [L45] x++ VAL [counter=41] [L31] EXPR counter++ VAL [counter=42] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=42] [L35] COND FALSE !(!(x <= X)) VAL [counter=42] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=42] [L45] x++ VAL [counter=42] [L31] EXPR counter++ VAL [counter=43] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=43] [L35] COND FALSE !(!(x <= X)) VAL [counter=43] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=43] [L45] x++ VAL [counter=43] [L31] EXPR counter++ VAL [counter=44] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=44] [L35] COND FALSE !(!(x <= X)) VAL [counter=44] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=44] [L45] x++ VAL [counter=44] [L31] EXPR counter++ VAL [counter=45] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=45] [L35] COND FALSE !(!(x <= X)) VAL [counter=45] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=45] [L45] x++ VAL [counter=45] [L31] EXPR counter++ VAL [counter=46] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=46] [L35] COND FALSE !(!(x <= X)) VAL [counter=46] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=46] [L45] x++ VAL [counter=46] [L31] EXPR counter++ VAL [counter=47] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=47] [L35] COND FALSE !(!(x <= X)) VAL [counter=47] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=47] [L45] x++ VAL [counter=47] [L31] EXPR counter++ VAL [counter=48] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=48] [L35] COND FALSE !(!(x <= X)) VAL [counter=48] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=48] [L45] x++ VAL [counter=48] [L31] EXPR counter++ VAL [counter=49] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=49] [L35] COND FALSE !(!(x <= X)) VAL [counter=49] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=49] [L45] x++ VAL [counter=49] [L31] EXPR counter++ VAL [counter=50] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=50] [L35] COND FALSE !(!(x <= X)) VAL [counter=50] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=50] [L45] x++ VAL [counter=50] [L31] EXPR counter++ VAL [counter=51] [L31] COND FALSE !(counter++<50) [L47] xy = (long long) x*y [L48] yx = (long long) Y*x [L14] COND TRUE !(cond) VAL [counter=51] [L16] reach_error() VAL [counter=51] - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 481.4s, OverallIterations: 66, TraceHistogramMax: 51, PathProgramHistogramMax: 50, EmptinessCheckTime: 0.1s, AutomataDifference: 29.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 764 SDtfs, 4136 SDslu, 8375 SDs, 0 SdLazy, 4203 SolverSat, 293 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9210 GetRequests, 6511 SyntacticMatches, 0 SemanticMatches, 2699 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21069 ImplicationChecksByTransitivity, 39.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=320occurred in iteration=65, InterpolantAutomatonStates: 2793, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 65 MinimizatonAttempts, 159 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.4s SsaConstructionTime, 331.4s SatisfiabilityAnalysisTime, 46.2s InterpolantComputationTime, 8294 NumberOfCodeBlocks, 8246 NumberOfCodeBlocksAsserted, 708 NumberOfCheckSat, 7922 ConstructedInterpolants, 0 QuantifiedInterpolants, 26206 SizeOfPredicates, 1377 NumberOfNonLiveVariables, 31508 ConjunctsInSsa, 2951 ConjunctsInUnsatCore, 65 InterpolantComputations, 4 PerfectInterpolantSequences, 112/120280 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 23:30:06,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fcc0947-fd41-412d-a928-82b7809fe2c2/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...