./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_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_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/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_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/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_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/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 7aff0c23635f1e1acd85672a1024d6cb6d0af57cad0028c56f5d301198b4eae6 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 23:14:32,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:14:32,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:14:33,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:14:33,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:14:33,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:14:33,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:14:33,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:14:33,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:14:33,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:14:33,021 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:14:33,023 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:14:33,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:14:33,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:14:33,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:14:33,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:14:33,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:14:33,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:14:33,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:14:33,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:14:33,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:14:33,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:14:33,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:14:33,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:14:33,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:14:33,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:14:33,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:14:33,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:14:33,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:14:33,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:14:33,061 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:14:33,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:14:33,063 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:14:33,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:14:33,066 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:14:33,067 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:14:33,068 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:14:33,073 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:14:33,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:14:33,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:14:33,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:14:33,077 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 23:14:33,104 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:14:33,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:14:33,105 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:14:33,105 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:14:33,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:14:33,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:14:33,107 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:14:33,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:14:33,108 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:14:33,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:14:33,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:14:33,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:14:33,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 23:14:33,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:14:33,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 23:14:33,109 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:14:33,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:14:33,110 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:14:33,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 23:14:33,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:14:33,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:14:33,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:14:33,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:14:33,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:14:33,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:14:33,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 23:14:33,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:14:33,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:14:33,112 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 23:14:33,112 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 23:14:33,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 23:14:33,113 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:14:33,113 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_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7aff0c23635f1e1acd85672a1024d6cb6d0af57cad0028c56f5d301198b4eae6 [2021-10-28 23:14:33,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:14:33,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:14:33,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:14:33,375 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:14:33,376 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:14:33,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c [2021-10-28 23:14:33,447 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/data/860da6c03/0f79af58092943e09d712f562b4b782a/FLAGcccdb730d [2021-10-28 23:14:33,988 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:14:33,988 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c [2021-10-28 23:14:33,995 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/data/860da6c03/0f79af58092943e09d712f562b4b782a/FLAGcccdb730d [2021-10-28 23:14:34,346 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/data/860da6c03/0f79af58092943e09d712f562b4b782a [2021-10-28 23:14:34,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:14:34,350 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:14:34,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:14:34,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:14:34,356 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:14:34,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:14:34" (1/1) ... [2021-10-28 23:14:34,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17c772fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:14:34, skipping insertion in model container [2021-10-28 23:14:34,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:14:34" (1/1) ... [2021-10-28 23:14:34,365 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:14:34,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:14:34,619 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_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c[573,586] [2021-10-28 23:14:34,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:14:34,641 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:14:34,654 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_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c[573,586] [2021-10-28 23:14:34,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:14:34,673 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:14:34,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:14:34 WrapperNode [2021-10-28 23:14:34,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:14:34,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:14:34,675 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:14:34,675 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:14:34,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:14:34" (1/1) ... [2021-10-28 23:14:34,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:14:34" (1/1) ... [2021-10-28 23:14:34,711 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:14:34,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:14:34,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:14:34,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:14:34,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:14:34" (1/1) ... [2021-10-28 23:14:34,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:14:34" (1/1) ... [2021-10-28 23:14:34,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:14:34" (1/1) ... [2021-10-28 23:14:34,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:14:34" (1/1) ... [2021-10-28 23:14:34,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:14:34" (1/1) ... [2021-10-28 23:14:34,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:14:34" (1/1) ... [2021-10-28 23:14:34,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:14:34" (1/1) ... [2021-10-28 23:14:34,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:14:34,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:14:34,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:14:34,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:14:34,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:14:34" (1/1) ... [2021-10-28 23:14:34,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:14:34,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:34,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:14:34,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:14:34,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:14:34,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:14:34,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:14:34,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:14:35,066 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:14:35,067 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-28 23:14:35,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:14:35 BoogieIcfgContainer [2021-10-28 23:14:35,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:14:35,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:14:35,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:14:35,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:14:35,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:14:34" (1/3) ... [2021-10-28 23:14:35,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23fc82d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:14:35, skipping insertion in model container [2021-10-28 23:14:35,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:14:34" (2/3) ... [2021-10-28 23:14:35,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23fc82d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:14:35, skipping insertion in model container [2021-10-28 23:14:35,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:14:35" (3/3) ... [2021-10-28 23:14:35,078 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound50.c [2021-10-28 23:14:35,084 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:14:35,084 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-28 23:14:35,139 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:14:35,146 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 23:14:35,146 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-28 23:14:35,163 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:35,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 23:14:35,168 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:35,169 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:35,170 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:35,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:35,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1235340721, now seen corresponding path program 1 times [2021-10-28 23:14:35,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:35,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851882617] [2021-10-28 23:14:35,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:35,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:14:35,384 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 23:14:35,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:35,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851882617] [2021-10-28 23:14:35,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851882617] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:14:35,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:14:35,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 23:14:35,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309424774] [2021-10-28 23:14:35,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 23:14:35,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:35,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 23:14:35,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:14:35,434 INFO L87 Difference]: Start difference. First operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 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 23:14:35,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:35,455 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2021-10-28 23:14:35,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 23:14:35,456 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-10-28 23:14:35,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:35,471 INFO L225 Difference]: With dead ends: 39 [2021-10-28 23:14:35,471 INFO L226 Difference]: Without dead ends: 17 [2021-10-28 23:14:35,474 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 23:14:35,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-28 23:14:35,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-28 23:14:35,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 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 23:14:35,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-10-28 23:14:35,538 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2021-10-28 23:14:35,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:35,539 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-28 23:14:35,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 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 23:14:35,540 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-10-28 23:14:35,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 23:14:35,540 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:35,540 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:35,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:14:35,541 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:35,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:35,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2021-10-28 23:14:35,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:35,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389942149] [2021-10-28 23:14:35,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:35,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:35,583 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:35,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1902954274] [2021-10-28 23:14:35,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:35,584 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:35,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:35,586 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:35,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:14:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:14:35,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 23:14:35,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:35,924 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 23:14:35,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:35,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389942149] [2021-10-28 23:14:35,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:35,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902954274] [2021-10-28 23:14:35,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902954274] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:14:35,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:14:35,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 23:14:35,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007638712] [2021-10-28 23:14:35,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:14:35,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:35,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:14:35,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:14:35,930 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 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 23:14:36,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:36,067 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-10-28 23:14:36,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:14:36,067 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-10-28 23:14:36,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:36,068 INFO L225 Difference]: With dead ends: 32 [2021-10-28 23:14:36,068 INFO L226 Difference]: Without dead ends: 30 [2021-10-28 23:14:36,069 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:14:36,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-28 23:14:36,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2021-10-28 23:14:36,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 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 23:14:36,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-10-28 23:14:36,075 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 10 [2021-10-28 23:14:36,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:36,075 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-10-28 23:14:36,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 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 23:14:36,076 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-10-28 23:14:36,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:14:36,076 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:36,077 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:36,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:14:36,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:36,306 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:36,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:36,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1507424085, now seen corresponding path program 1 times [2021-10-28 23:14:36,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:36,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297288829] [2021-10-28 23:14:36,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:36,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:36,339 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:36,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138426882] [2021-10-28 23:14:36,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:36,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:36,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:36,346 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:36,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:14:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:14:36,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 23:14:36,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:36,503 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 23:14:36,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:36,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297288829] [2021-10-28 23:14:36,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:36,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138426882] [2021-10-28 23:14:36,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138426882] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:14:36,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:14:36,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:14:36,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934739880] [2021-10-28 23:14:36,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:14:36,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:36,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:14:36,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:14:36,507 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:36,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:36,519 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-10-28 23:14:36,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:14:36,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-28 23:14:36,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:36,520 INFO L225 Difference]: With dead ends: 24 [2021-10-28 23:14:36,520 INFO L226 Difference]: Without dead ends: 20 [2021-10-28 23:14:36,521 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:14:36,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-28 23:14:36,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-28 23:14:36,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:36,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-10-28 23:14:36,525 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2021-10-28 23:14:36,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:36,526 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-10-28 23:14:36,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:36,526 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-10-28 23:14:36,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:14:36,527 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:36,527 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:36,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:14:36,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:36,750 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:36,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:36,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1189458428, now seen corresponding path program 1 times [2021-10-28 23:14:36,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:36,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138911042] [2021-10-28 23:14:36,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:36,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:36,783 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:36,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117278645] [2021-10-28 23:14:36,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:36,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:36,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:36,788 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:36,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:14:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:14:36,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:14:36,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:36,961 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 23:14:36,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:36,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138911042] [2021-10-28 23:14:36,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:36,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117278645] [2021-10-28 23:14:36,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117278645] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:14:36,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:14:36,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 23:14:36,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411628429] [2021-10-28 23:14:36,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:14:36,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:36,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:14:36,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:14:36,964 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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 23:14:37,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:37,051 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-10-28 23:14:37,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:14:37,051 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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 23:14:37,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:37,052 INFO L225 Difference]: With dead ends: 24 [2021-10-28 23:14:37,052 INFO L226 Difference]: Without dead ends: 18 [2021-10-28 23:14:37,053 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:14:37,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-28 23:14:37,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-10-28 23:14:37,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 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 23:14:37,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-10-28 23:14:37,057 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2021-10-28 23:14:37,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:37,057 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-10-28 23:14:37,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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 23:14:37,058 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-10-28 23:14:37,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 23:14:37,058 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:37,058 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:37,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:14:37,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:37,274 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:37,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:37,274 INFO L85 PathProgramCache]: Analyzing trace with hash -132612007, now seen corresponding path program 1 times [2021-10-28 23:14:37,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:37,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470046032] [2021-10-28 23:14:37,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:37,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:37,318 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:37,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336563411] [2021-10-28 23:14:37,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:37,319 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:37,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:37,320 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:37,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:14:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:14:37,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 23:14:37,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:37,458 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 23:14:37,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:37,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470046032] [2021-10-28 23:14:37,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:37,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336563411] [2021-10-28 23:14:37,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336563411] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:14:37,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:14:37,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-28 23:14:37,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367774354] [2021-10-28 23:14:37,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:14:37,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:37,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:14:37,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:14:37,462 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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 23:14:37,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:37,485 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-10-28 23:14:37,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:14:37,486 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-28 23:14:37,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:37,487 INFO L225 Difference]: With dead ends: 26 [2021-10-28 23:14:37,487 INFO L226 Difference]: Without dead ends: 22 [2021-10-28 23:14:37,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 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 23:14:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-28 23:14:37,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-28 23:14:37,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:37,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-10-28 23:14:37,493 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2021-10-28 23:14:37,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:37,493 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-10-28 23:14:37,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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 23:14:37,494 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-10-28 23:14:37,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 23:14:37,495 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:37,495 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:37,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:14:37,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:37,714 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:37,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:37,714 INFO L85 PathProgramCache]: Analyzing trace with hash -625728149, now seen corresponding path program 2 times [2021-10-28 23:14:37,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:37,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322236087] [2021-10-28 23:14:37,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:37,715 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:37,729 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:37,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622279970] [2021-10-28 23:14:37,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:14:37,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:37,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:37,731 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:37,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:14:37,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:14:37,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:14:37,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:14:37,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:14:37,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:37,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322236087] [2021-10-28 23:14:37,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:37,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622279970] [2021-10-28 23:14:37,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622279970] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:14:37,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:14:37,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-28 23:14:37,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700337176] [2021-10-28 23:14:37,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:14:37,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:37,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:14:37,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:14:37,959 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 23:14:37,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:38,000 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-10-28 23:14:38,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:14:38,001 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 23:14:38,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:38,002 INFO L225 Difference]: With dead ends: 31 [2021-10-28 23:14:38,002 INFO L226 Difference]: Without dead ends: 27 [2021-10-28 23:14:38,002 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 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 23:14:38,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-28 23:14:38,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-28 23:14:38,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:38,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-10-28 23:14:38,008 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2021-10-28 23:14:38,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:38,009 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-10-28 23:14:38,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 23:14:38,009 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-10-28 23:14:38,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 23:14:38,010 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:38,011 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:38,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:14:38,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-28 23:14:38,232 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:38,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:38,233 INFO L85 PathProgramCache]: Analyzing trace with hash 256826265, now seen corresponding path program 3 times [2021-10-28 23:14:38,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:38,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981811966] [2021-10-28 23:14:38,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:38,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:38,248 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:38,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879042807] [2021-10-28 23:14:38,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:14:38,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:38,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:38,250 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:38,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 23:14:38,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 23:14:38,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:14:38,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:14:38,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:38,450 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:14:38,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:38,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981811966] [2021-10-28 23:14:38,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:38,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879042807] [2021-10-28 23:14:38,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879042807] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:14:38,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:14:38,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 23:14:38,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446471412] [2021-10-28 23:14:38,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:14:38,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:38,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:14:38,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:14:38,462 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:38,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:38,515 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-10-28 23:14:38,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:14:38,516 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-28 23:14:38,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:38,517 INFO L225 Difference]: With dead ends: 36 [2021-10-28 23:14:38,518 INFO L226 Difference]: Without dead ends: 32 [2021-10-28 23:14:38,518 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 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 23:14:38,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-28 23:14:38,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-28 23:14:38,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:38,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-10-28 23:14:38,539 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 26 [2021-10-28 23:14:38,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:38,539 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-10-28 23:14:38,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:38,540 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-10-28 23:14:38,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 23:14:38,542 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:38,545 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:38,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:14:38,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:38,762 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:38,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:38,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1955278293, now seen corresponding path program 4 times [2021-10-28 23:14:38,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:38,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868317764] [2021-10-28 23:14:38,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:38,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:38,772 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:38,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1310297882] [2021-10-28 23:14:38,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:14:38,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:38,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:38,777 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:38,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 23:14:38,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:14:38,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:14:38,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:14:38,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:39,019 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:14:39,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:39,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868317764] [2021-10-28 23:14:39,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:39,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310297882] [2021-10-28 23:14:39,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310297882] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:14:39,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:14:39,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 23:14:39,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609831931] [2021-10-28 23:14:39,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:14:39,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:39,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:14:39,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:14:39,022 INFO L87 Difference]: Start difference. First operand 32 states and 36 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 23:14:39,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:39,069 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-10-28 23:14:39,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:14:39,069 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 23:14:39,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:39,070 INFO L225 Difference]: With dead ends: 41 [2021-10-28 23:14:39,070 INFO L226 Difference]: Without dead ends: 37 [2021-10-28 23:14:39,070 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 23:14:39,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-28 23:14:39,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-10-28 23:14:39,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-10-28 23:14:39,076 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 31 [2021-10-28 23:14:39,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:39,077 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-10-28 23:14:39,077 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 23:14:39,077 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-10-28 23:14:39,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 23:14:39,078 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:39,078 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:39,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:14:39,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:39,298 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:39,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:39,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1615059239, now seen corresponding path program 5 times [2021-10-28 23:14:39,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:39,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443704329] [2021-10-28 23:14:39,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:39,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:39,311 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:39,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131396136] [2021-10-28 23:14:39,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:14:39,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:39,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:39,314 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:39,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 23:14:39,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 23:14:39,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:14:39,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 23:14:39,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:14:39,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:39,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443704329] [2021-10-28 23:14:39,587 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:39,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131396136] [2021-10-28 23:14:39,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131396136] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:14:39,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:14:39,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 23:14:39,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596394718] [2021-10-28 23:14:39,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:14:39,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:39,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:14:39,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:14:39,593 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:39,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:39,673 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-10-28 23:14:39,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 23:14:39,674 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-28 23:14:39,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:39,679 INFO L225 Difference]: With dead ends: 46 [2021-10-28 23:14:39,679 INFO L226 Difference]: Without dead ends: 42 [2021-10-28 23:14:39,679 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 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 23:14:39,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-28 23:14:39,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-28 23:14:39,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 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 23:14:39,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-10-28 23:14:39,698 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 36 [2021-10-28 23:14:39,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:39,699 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-10-28 23:14:39,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:39,700 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-10-28 23:14:39,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-28 23:14:39,703 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:39,703 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:39,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-28 23:14:39,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-28 23:14:39,904 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:39,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:39,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1613459733, now seen corresponding path program 6 times [2021-10-28 23:14:39,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:39,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472519678] [2021-10-28 23:14:39,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:39,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:39,939 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:39,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263961476] [2021-10-28 23:14:39,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:14:39,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:39,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:39,947 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:39,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 23:14:40,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-28 23:14:40,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:14:40,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 23:14:40,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:40,272 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:14:40,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:40,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472519678] [2021-10-28 23:14:40,273 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:40,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263961476] [2021-10-28 23:14:40,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263961476] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:14:40,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:14:40,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-28 23:14:40,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514495764] [2021-10-28 23:14:40,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:14:40,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:40,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:14:40,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:14:40,278 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:40,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:40,364 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2021-10-28 23:14:40,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:14:40,364 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-28 23:14:40,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:40,368 INFO L225 Difference]: With dead ends: 51 [2021-10-28 23:14:40,368 INFO L226 Difference]: Without dead ends: 47 [2021-10-28 23:14:40,369 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 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 23:14:40,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-28 23:14:40,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-10-28 23:14:40,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:40,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-10-28 23:14:40,391 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 41 [2021-10-28 23:14:40,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:40,393 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-10-28 23:14:40,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:40,394 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-10-28 23:14:40,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 23:14:40,397 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:40,397 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:40,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 23:14:40,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:40,598 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:40,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:40,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2055970279, now seen corresponding path program 7 times [2021-10-28 23:14:40,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:40,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217017841] [2021-10-28 23:14:40,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:40,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:40,614 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:40,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539937672] [2021-10-28 23:14:40,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:14:40,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:40,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:40,616 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:40,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 23:14:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:14:40,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:14:40,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:14:41,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:41,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217017841] [2021-10-28 23:14:41,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:41,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539937672] [2021-10-28 23:14:41,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539937672] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:14:41,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:14:41,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 23:14:41,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097268168] [2021-10-28 23:14:41,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 23:14:41,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:41,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 23:14:41,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:14:41,025 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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 23:14:41,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:41,110 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-10-28 23:14:41,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 23:14:41,110 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-28 23:14:41,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:41,112 INFO L225 Difference]: With dead ends: 56 [2021-10-28 23:14:41,112 INFO L226 Difference]: Without dead ends: 52 [2021-10-28 23:14:41,112 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:14:41,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-28 23:14:41,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-10-28 23:14:41,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 23:14:41,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2021-10-28 23:14:41,124 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 46 [2021-10-28 23:14:41,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:41,124 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2021-10-28 23:14:41,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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 23:14:41,125 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2021-10-28 23:14:41,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 23:14:41,126 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:41,126 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:41,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 23:14:41,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-28 23:14:41,341 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:41,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:41,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1472242773, now seen corresponding path program 8 times [2021-10-28 23:14:41,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:41,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399866715] [2021-10-28 23:14:41,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:41,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:41,353 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:41,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40931751] [2021-10-28 23:14:41,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:14:41,354 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:41,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:41,355 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:41,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 23:14:41,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:14:41,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:14:41,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 23:14:41,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:14:41,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:41,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399866715] [2021-10-28 23:14:41,746 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:41,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40931751] [2021-10-28 23:14:41,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40931751] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:14:41,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:14:41,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-28 23:14:41,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345152380] [2021-10-28 23:14:41,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:14:41,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:41,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:14:41,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:14:41,748 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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 23:14:41,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:41,878 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-10-28 23:14:41,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 23:14:41,879 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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) Word has length 51 [2021-10-28 23:14:41,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:41,879 INFO L225 Difference]: With dead ends: 61 [2021-10-28 23:14:41,880 INFO L226 Difference]: Without dead ends: 57 [2021-10-28 23:14:41,880 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 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 23:14:41,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-28 23:14:41,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-10-28 23:14:41,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 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 23:14:41,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-10-28 23:14:41,888 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 51 [2021-10-28 23:14:41,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:41,888 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-10-28 23:14:41,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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 23:14:41,889 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-10-28 23:14:41,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-28 23:14:41,890 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:41,890 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:41,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 23:14:42,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:42,111 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:42,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:42,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1819570855, now seen corresponding path program 9 times [2021-10-28 23:14:42,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:42,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289811011] [2021-10-28 23:14:42,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:42,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:42,123 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:42,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977082475] [2021-10-28 23:14:42,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:14:42,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:42,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:42,135 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:42,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 23:14:42,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-28 23:14:42,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:14:42,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 23:14:42,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:14:42,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:42,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289811011] [2021-10-28 23:14:42,622 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:42,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977082475] [2021-10-28 23:14:42,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977082475] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:14:42,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:14:42,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-28 23:14:42,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849739207] [2021-10-28 23:14:42,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 23:14:42,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:42,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:14:42,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:14:42,625 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 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 23:14:42,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:42,770 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2021-10-28 23:14:42,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 23:14:42,770 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 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) Word has length 56 [2021-10-28 23:14:42,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:42,771 INFO L225 Difference]: With dead ends: 66 [2021-10-28 23:14:42,771 INFO L226 Difference]: Without dead ends: 62 [2021-10-28 23:14:42,771 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 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 23:14:42,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-28 23:14:42,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-28 23:14:42,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:42,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-10-28 23:14:42,777 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 56 [2021-10-28 23:14:42,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:42,777 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-10-28 23:14:42,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 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 23:14:42,778 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-10-28 23:14:42,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 23:14:42,779 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:42,779 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:42,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 23:14:42,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 23:14:42,994 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:42,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:42,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1641990037, now seen corresponding path program 10 times [2021-10-28 23:14:42,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:42,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082928047] [2021-10-28 23:14:42,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:42,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:43,005 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:43,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547172776] [2021-10-28 23:14:43,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:14:43,006 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:43,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:43,007 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:43,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 23:14:43,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:14:43,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:14:43,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 23:14:43,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:14:43,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:43,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082928047] [2021-10-28 23:14:43,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:43,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547172776] [2021-10-28 23:14:43,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547172776] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:14:43,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:14:43,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-28 23:14:43,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137096022] [2021-10-28 23:14:43,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 23:14:43,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:43,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 23:14:43,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:14:43,461 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 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 23:14:43,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:43,590 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2021-10-28 23:14:43,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 23:14:43,590 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 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 23:14:43,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:43,591 INFO L225 Difference]: With dead ends: 71 [2021-10-28 23:14:43,592 INFO L226 Difference]: Without dead ends: 67 [2021-10-28 23:14:43,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 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 23:14:43,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-28 23:14:43,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-10-28 23:14:43,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:43,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-10-28 23:14:43,601 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 61 [2021-10-28 23:14:43,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:43,602 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-10-28 23:14:43,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 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 23:14:43,602 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-10-28 23:14:43,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-10-28 23:14:43,603 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:43,603 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:43,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 23:14:43,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 23:14:43,822 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:43,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:43,822 INFO L85 PathProgramCache]: Analyzing trace with hash -736778087, now seen corresponding path program 11 times [2021-10-28 23:14:43,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:43,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492216019] [2021-10-28 23:14:43,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:43,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:43,834 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:43,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189198746] [2021-10-28 23:14:43,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:14:43,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:43,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:43,835 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:43,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 23:14:44,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-10-28 23:14:44,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:14:44,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 23:14:44,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:44,454 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:14:44,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:44,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492216019] [2021-10-28 23:14:44,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:44,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189198746] [2021-10-28 23:14:44,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189198746] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:14:44,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:14:44,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-10-28 23:14:44,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372324911] [2021-10-28 23:14:44,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 23:14:44,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:44,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 23:14:44,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:14:44,458 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 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 23:14:44,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:44,613 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2021-10-28 23:14:44,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 23:14:44,613 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 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) Word has length 66 [2021-10-28 23:14:44,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:44,614 INFO L225 Difference]: With dead ends: 76 [2021-10-28 23:14:44,614 INFO L226 Difference]: Without dead ends: 72 [2021-10-28 23:14:44,615 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 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 23:14:44,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-28 23:14:44,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-10-28 23:14:44,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 71 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 23:14:44,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2021-10-28 23:14:44,622 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 66 [2021-10-28 23:14:44,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:44,622 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2021-10-28 23:14:44,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 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 23:14:44,623 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2021-10-28 23:14:44,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-28 23:14:44,624 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:44,624 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:44,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 23:14:44,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 23:14:44,846 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:44,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:44,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1545198293, now seen corresponding path program 12 times [2021-10-28 23:14:44,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:44,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792460300] [2021-10-28 23:14:44,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:44,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:44,856 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:44,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353474315] [2021-10-28 23:14:44,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:14:44,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:44,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:44,858 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:44,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 23:14:45,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-10-28 23:14:45,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:14:45,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 23:14:45,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:14:45,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:45,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792460300] [2021-10-28 23:14:45,435 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:45,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353474315] [2021-10-28 23:14:45,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353474315] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:14:45,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:14:45,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-10-28 23:14:45,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599686849] [2021-10-28 23:14:45,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 23:14:45,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:45,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 23:14:45,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:14:45,439 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 16 states, 16 states have (on average 4.4375) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:45,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:45,642 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-10-28 23:14:45,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 23:14:45,642 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-10-28 23:14:45,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:45,644 INFO L225 Difference]: With dead ends: 81 [2021-10-28 23:14:45,644 INFO L226 Difference]: Without dead ends: 77 [2021-10-28 23:14:45,645 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 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 23:14:45,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-28 23:14:45,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-10-28 23:14:45,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 76 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 23:14:45,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2021-10-28 23:14:45,653 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 71 [2021-10-28 23:14:45,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:45,653 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2021-10-28 23:14:45,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:45,654 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2021-10-28 23:14:45,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-28 23:14:45,655 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:45,656 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:45,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 23:14:45,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 23:14:45,882 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:45,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:45,882 INFO L85 PathProgramCache]: Analyzing trace with hash -936987687, now seen corresponding path program 13 times [2021-10-28 23:14:45,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:45,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716370818] [2021-10-28 23:14:45,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:45,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:45,895 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:45,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170024369] [2021-10-28 23:14:45,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:14:45,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:45,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:45,896 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:45,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 23:14:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:14:46,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 23:14:46,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:46,475 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:14:46,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:46,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716370818] [2021-10-28 23:14:46,476 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:46,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170024369] [2021-10-28 23:14:46,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170024369] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:14:46,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:14:46,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-10-28 23:14:46,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904301053] [2021-10-28 23:14:46,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 23:14:46,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:46,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 23:14:46,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:14:46,479 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:46,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:46,655 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2021-10-28 23:14:46,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 23:14:46,656 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-10-28 23:14:46,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:46,657 INFO L225 Difference]: With dead ends: 86 [2021-10-28 23:14:46,657 INFO L226 Difference]: Without dead ends: 82 [2021-10-28 23:14:46,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 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 23:14:46,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-28 23:14:46,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-10-28 23:14:46,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1851851851851851) internal successors, (96), 81 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 23:14:46,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2021-10-28 23:14:46,666 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 76 [2021-10-28 23:14:46,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:46,666 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2021-10-28 23:14:46,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:46,666 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2021-10-28 23:14:46,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-10-28 23:14:46,667 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:46,668 INFO L513 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:46,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 23:14:46,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 23:14:46,878 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:46,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:46,878 INFO L85 PathProgramCache]: Analyzing trace with hash -990240277, now seen corresponding path program 14 times [2021-10-28 23:14:46,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:46,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223851470] [2021-10-28 23:14:46,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:46,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:46,890 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:46,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935353040] [2021-10-28 23:14:46,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:14:46,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:46,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:46,900 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:46,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 23:14:47,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:14:47,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:14:47,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-28 23:14:47,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:47,630 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:14:47,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:47,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223851470] [2021-10-28 23:14:47,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:47,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935353040] [2021-10-28 23:14:47,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935353040] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:14:47,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:14:47,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-10-28 23:14:47,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904921164] [2021-10-28 23:14:47,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 23:14:47,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:47,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 23:14:47,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:14:47,635 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand has 18 states, 18 states have (on average 4.5) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 23:14:47,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:47,875 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2021-10-28 23:14:47,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-28 23:14:47,875 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-10-28 23:14:47,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:47,877 INFO L225 Difference]: With dead ends: 91 [2021-10-28 23:14:47,877 INFO L226 Difference]: Without dead ends: 87 [2021-10-28 23:14:47,878 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:14:47,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-28 23:14:47,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-10-28 23:14:47,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.186046511627907) internal successors, (102), 86 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 23:14:47,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2021-10-28 23:14:47,888 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 81 [2021-10-28 23:14:47,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:47,888 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2021-10-28 23:14:47,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 23:14:47,889 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2021-10-28 23:14:47,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-28 23:14:47,890 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:47,890 INFO L513 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:47,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 23:14:48,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 23:14:48,114 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:48,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:48,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1479364839, now seen corresponding path program 15 times [2021-10-28 23:14:48,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:48,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899222096] [2021-10-28 23:14:48,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:48,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:48,129 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:48,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646273617] [2021-10-28 23:14:48,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:14:48,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:48,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:48,131 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:48,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 23:14:48,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-10-28 23:14:48,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:14:48,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-28 23:14:48,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:14:48,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:48,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899222096] [2021-10-28 23:14:48,882 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:48,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646273617] [2021-10-28 23:14:48,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646273617] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:14:48,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:14:48,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-10-28 23:14:48,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766190841] [2021-10-28 23:14:48,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 23:14:48,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:48,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 23:14:48,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:14:48,886 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:49,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:49,107 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2021-10-28 23:14:49,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-28 23:14:49,107 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-10-28 23:14:49,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:49,108 INFO L225 Difference]: With dead ends: 96 [2021-10-28 23:14:49,108 INFO L226 Difference]: Without dead ends: 92 [2021-10-28 23:14:49,109 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 68 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 23:14:49,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-28 23:14:49,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-10-28 23:14:49,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.1868131868131868) internal successors, (108), 91 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 23:14:49,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2021-10-28 23:14:49,117 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 86 [2021-10-28 23:14:49,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:49,118 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2021-10-28 23:14:49,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:49,118 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2021-10-28 23:14:49,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-10-28 23:14:49,119 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:49,120 INFO L513 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:49,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 23:14:49,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:49,334 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:49,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:49,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1245106517, now seen corresponding path program 16 times [2021-10-28 23:14:49,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:49,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294522544] [2021-10-28 23:14:49,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:49,335 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:49,355 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:49,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191639499] [2021-10-28 23:14:49,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:14:49,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:49,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:49,358 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:49,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 23:14:49,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:14:49,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:14:49,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 23:14:49,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:14:50,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:50,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294522544] [2021-10-28 23:14:50,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:50,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191639499] [2021-10-28 23:14:50,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191639499] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:14:50,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:14:50,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-10-28 23:14:50,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665264511] [2021-10-28 23:14:50,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 23:14:50,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:50,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 23:14:50,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:14:50,237 INFO L87 Difference]: Start difference. First operand 92 states and 108 transitions. Second operand has 20 states, 20 states have (on average 4.55) internal successors, (91), 19 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 23:14:50,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:50,500 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2021-10-28 23:14:50,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-28 23:14:50,500 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 19 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 23:14:50,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:50,501 INFO L225 Difference]: With dead ends: 101 [2021-10-28 23:14:50,502 INFO L226 Difference]: Without dead ends: 97 [2021-10-28 23:14:50,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 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 23:14:50,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-28 23:14:50,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-10-28 23:14:50,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1875) internal successors, (114), 96 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 23:14:50,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2021-10-28 23:14:50,512 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 91 [2021-10-28 23:14:50,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:50,512 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2021-10-28 23:14:50,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 19 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 23:14:50,513 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2021-10-28 23:14:50,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-10-28 23:14:50,514 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:50,514 INFO L513 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:50,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 23:14:50,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:50,734 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:50,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:50,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1574069671, now seen corresponding path program 17 times [2021-10-28 23:14:50,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:50,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294205538] [2021-10-28 23:14:50,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:50,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:50,743 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:50,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963660468] [2021-10-28 23:14:50,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:14:50,744 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:50,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:50,751 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:50,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 23:14:51,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-10-28 23:14:51,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:14:51,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-28 23:14:51,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:51,619 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:14:51,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:51,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294205538] [2021-10-28 23:14:51,619 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:51,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963660468] [2021-10-28 23:14:51,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963660468] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:14:51,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:14:51,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-10-28 23:14:51,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785895716] [2021-10-28 23:14:51,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 23:14:51,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:51,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 23:14:51,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:14:51,624 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 23:14:51,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:51,870 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2021-10-28 23:14:51,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-28 23:14:51,871 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-10-28 23:14:51,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:51,872 INFO L225 Difference]: With dead ends: 106 [2021-10-28 23:14:51,872 INFO L226 Difference]: Without dead ends: 102 [2021-10-28 23:14:51,873 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 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 23:14:51,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-28 23:14:51,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-10-28 23:14:51,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.188118811881188) internal successors, (120), 101 states have internal predecessors, (120), 0 states have call successors, (0), 0 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 23:14:51,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 120 transitions. [2021-10-28 23:14:51,882 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 120 transitions. Word has length 96 [2021-10-28 23:14:51,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:51,883 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 120 transitions. [2021-10-28 23:14:51,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 23:14:51,883 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 120 transitions. [2021-10-28 23:14:51,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-10-28 23:14:51,884 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:51,885 INFO L513 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:51,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 23:14:52,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-28 23:14:52,110 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:52,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:52,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1816179861, now seen corresponding path program 18 times [2021-10-28 23:14:52,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:52,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572954565] [2021-10-28 23:14:52,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:52,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:52,120 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:52,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608694222] [2021-10-28 23:14:52,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:14:52,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:52,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:52,125 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:52,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 23:14:52,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-10-28 23:14:52,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:14:52,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-28 23:14:52,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:53,074 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:14:53,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:53,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572954565] [2021-10-28 23:14:53,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:53,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608694222] [2021-10-28 23:14:53,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608694222] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:14:53,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:14:53,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-10-28 23:14:53,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466917817] [2021-10-28 23:14:53,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 23:14:53,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:53,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 23:14:53,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:14:53,080 INFO L87 Difference]: Start difference. First operand 102 states and 120 transitions. Second operand has 22 states, 22 states have (on average 4.590909090909091) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:53,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:53,337 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2021-10-28 23:14:53,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-28 23:14:53,338 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.590909090909091) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-10-28 23:14:53,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:53,339 INFO L225 Difference]: With dead ends: 111 [2021-10-28 23:14:53,339 INFO L226 Difference]: Without dead ends: 107 [2021-10-28 23:14:53,340 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 23:14:53,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-28 23:14:53,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-10-28 23:14:53,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.1886792452830188) internal successors, (126), 106 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 23:14:53,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2021-10-28 23:14:53,357 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 101 [2021-10-28 23:14:53,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:53,358 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2021-10-28 23:14:53,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.590909090909091) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:14:53,358 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2021-10-28 23:14:53,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-28 23:14:53,359 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:53,359 INFO L513 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:53,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-10-28 23:14:53,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-28 23:14:53,578 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:53,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:53,578 INFO L85 PathProgramCache]: Analyzing trace with hash 491484569, now seen corresponding path program 19 times [2021-10-28 23:14:53,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:53,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207779202] [2021-10-28 23:14:53,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:53,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:53,588 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:53,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083557446] [2021-10-28 23:14:53,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:14:53,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:53,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:53,596 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:53,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 23:14:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:14:54,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-28 23:14:54,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:14:54,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:54,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207779202] [2021-10-28 23:14:54,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:54,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083557446] [2021-10-28 23:14:54,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083557446] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:14:54,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:14:54,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-10-28 23:14:54,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795757713] [2021-10-28 23:14:54,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 23:14:54,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:54,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 23:14:54,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:14:54,533 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand has 23 states, 23 states have (on average 4.608695652173913) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 23:14:54,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:54,815 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2021-10-28 23:14:54,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-28 23:14:54,815 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.608695652173913) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-10-28 23:14:54,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:54,816 INFO L225 Difference]: With dead ends: 116 [2021-10-28 23:14:54,816 INFO L226 Difference]: Without dead ends: 112 [2021-10-28 23:14:54,817 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 23:14:54,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-28 23:14:54,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-10-28 23:14:54,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.1891891891891893) internal successors, (132), 111 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 23:14:54,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2021-10-28 23:14:54,827 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 106 [2021-10-28 23:14:54,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:54,828 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2021-10-28 23:14:54,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.608695652173913) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 23:14:54,828 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2021-10-28 23:14:54,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-10-28 23:14:54,829 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:54,829 INFO L513 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:54,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 23:14:55,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 23:14:55,052 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:55,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:55,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1521977301, now seen corresponding path program 20 times [2021-10-28 23:14:55,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:55,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360195322] [2021-10-28 23:14:55,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:55,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:55,061 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:55,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134106577] [2021-10-28 23:14:55,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:14:55,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:55,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:55,063 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:55,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 23:14:55,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:14:55,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:14:55,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-28 23:14:55,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:56,034 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:14:56,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:56,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360195322] [2021-10-28 23:14:56,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:56,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134106577] [2021-10-28 23:14:56,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134106577] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:14:56,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:14:56,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-10-28 23:14:56,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986000257] [2021-10-28 23:14:56,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-28 23:14:56,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:56,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-28 23:14:56,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-10-28 23:14:56,037 INFO L87 Difference]: Start difference. First operand 112 states and 132 transitions. Second operand has 24 states, 24 states have (on average 4.625) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 0 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 23:14:56,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:56,360 INFO L93 Difference]: Finished difference Result 121 states and 142 transitions. [2021-10-28 23:14:56,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-28 23:14:56,361 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.625) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2021-10-28 23:14:56,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:56,362 INFO L225 Difference]: With dead ends: 121 [2021-10-28 23:14:56,362 INFO L226 Difference]: Without dead ends: 117 [2021-10-28 23:14:56,363 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 88 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 23:14:56,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-10-28 23:14:56,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-10-28 23:14:56,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.1896551724137931) internal successors, (138), 116 states have internal predecessors, (138), 0 states have call successors, (0), 0 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 23:14:56,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 138 transitions. [2021-10-28 23:14:56,371 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 138 transitions. Word has length 111 [2021-10-28 23:14:56,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:56,372 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 138 transitions. [2021-10-28 23:14:56,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.625) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 0 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 23:14:56,372 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2021-10-28 23:14:56,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-10-28 23:14:56,373 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:56,373 INFO L513 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:56,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 23:14:56,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 23:14:56,594 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:56,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:56,594 INFO L85 PathProgramCache]: Analyzing trace with hash -163561255, now seen corresponding path program 21 times [2021-10-28 23:14:56,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:56,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743230920] [2021-10-28 23:14:56,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:56,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:56,610 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:56,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821515525] [2021-10-28 23:14:56,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:14:56,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:56,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:56,612 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:56,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 23:14:57,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-10-28 23:14:57,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:14:57,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-28 23:14:57,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:14:57,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:57,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743230920] [2021-10-28 23:14:57,714 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:57,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821515525] [2021-10-28 23:14:57,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821515525] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:14:57,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:14:57,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-10-28 23:14:57,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551576046] [2021-10-28 23:14:57,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 23:14:57,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:57,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 23:14:57,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-10-28 23:14:57,716 INFO L87 Difference]: Start difference. First operand 117 states and 138 transitions. Second operand has 25 states, 25 states have (on average 4.64) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 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 23:14:58,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:58,065 INFO L93 Difference]: Finished difference Result 126 states and 148 transitions. [2021-10-28 23:14:58,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-28 23:14:58,066 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.64) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2021-10-28 23:14:58,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:58,067 INFO L225 Difference]: With dead ends: 126 [2021-10-28 23:14:58,067 INFO L226 Difference]: Without dead ends: 122 [2021-10-28 23:14:58,069 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 92 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 23:14:58,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-28 23:14:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-10-28 23:14:58,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1900826446280992) internal successors, (144), 121 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 23:14:58,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2021-10-28 23:14:58,078 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 116 [2021-10-28 23:14:58,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:58,078 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2021-10-28 23:14:58,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.64) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 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 23:14:58,078 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2021-10-28 23:14:58,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-10-28 23:14:58,079 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:58,079 INFO L513 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:58,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-28 23:14:58,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:58,306 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:14:58,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:14:58,306 INFO L85 PathProgramCache]: Analyzing trace with hash 433108203, now seen corresponding path program 22 times [2021-10-28 23:14:58,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:14:58,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931613957] [2021-10-28 23:14:58,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:14:58,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:14:58,321 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:14:58,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259742709] [2021-10-28 23:14:58,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:14:58,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:14:58,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:14:58,322 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:14:58,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 23:14:58,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:14:58,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:14:58,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-28 23:14:58,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:14:59,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:14:59,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:14:59,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931613957] [2021-10-28 23:14:59,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:14:59,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259742709] [2021-10-28 23:14:59,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259742709] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:14:59,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:14:59,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-10-28 23:14:59,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421704893] [2021-10-28 23:14:59,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 23:14:59,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:14:59,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 23:14:59,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-10-28 23:14:59,452 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 25 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 23:14:59,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:14:59,828 INFO L93 Difference]: Finished difference Result 131 states and 154 transitions. [2021-10-28 23:14:59,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-28 23:14:59,828 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 25 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 23:14:59,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:14:59,829 INFO L225 Difference]: With dead ends: 131 [2021-10-28 23:14:59,829 INFO L226 Difference]: Without dead ends: 127 [2021-10-28 23:14:59,830 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 96 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 23:14:59,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-28 23:14:59,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-10-28 23:14:59,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.1904761904761905) internal successors, (150), 126 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 23:14:59,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 150 transitions. [2021-10-28 23:14:59,839 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 150 transitions. Word has length 121 [2021-10-28 23:14:59,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:14:59,839 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 150 transitions. [2021-10-28 23:14:59,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 25 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 23:14:59,840 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 150 transitions. [2021-10-28 23:14:59,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-10-28 23:14:59,840 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:14:59,840 INFO L513 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:14:59,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:00,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 23:15:00,062 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:00,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:00,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1054868455, now seen corresponding path program 23 times [2021-10-28 23:15:00,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:00,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906686922] [2021-10-28 23:15:00,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:00,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:00,073 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:15:00,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [905438950] [2021-10-28 23:15:00,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:15:00,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:00,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:00,075 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:00,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-28 23:15:00,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-10-28 23:15:00,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:00,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-28 23:15:00,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:01,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:01,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906686922] [2021-10-28 23:15:01,416 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:15:01,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905438950] [2021-10-28 23:15:01,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905438950] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:01,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:15:01,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-10-28 23:15:01,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928188741] [2021-10-28 23:15:01,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 23:15:01,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:01,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 23:15:01,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:15:01,418 INFO L87 Difference]: Start difference. First operand 127 states and 150 transitions. Second operand has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 26 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 23:15:01,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:01,806 INFO L93 Difference]: Finished difference Result 136 states and 160 transitions. [2021-10-28 23:15:01,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-28 23:15:01,807 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 26 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) Word has length 126 [2021-10-28 23:15:01,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:01,810 INFO L225 Difference]: With dead ends: 136 [2021-10-28 23:15:01,810 INFO L226 Difference]: Without dead ends: 132 [2021-10-28 23:15:01,812 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=925, Invalid=1525, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 23:15:01,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-28 23:15:01,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2021-10-28 23:15:01,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.1908396946564885) internal successors, (156), 131 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 23:15:01,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 156 transitions. [2021-10-28 23:15:01,819 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 156 transitions. Word has length 126 [2021-10-28 23:15:01,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:01,819 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 156 transitions. [2021-10-28 23:15:01,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 26 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 23:15:01,820 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 156 transitions. [2021-10-28 23:15:01,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-10-28 23:15:01,821 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:01,821 INFO L513 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:01,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-10-28 23:15:02,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 23:15:02,042 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:02,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:02,043 INFO L85 PathProgramCache]: Analyzing trace with hash -909901397, now seen corresponding path program 24 times [2021-10-28 23:15:02,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:02,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416934488] [2021-10-28 23:15:02,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:02,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:02,053 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:15:02,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492188841] [2021-10-28 23:15:02,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:15:02,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:02,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:02,055 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:02,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-28 23:15:02,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-10-28 23:15:02,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:02,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-28 23:15:02,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:03,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:03,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416934488] [2021-10-28 23:15:03,488 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:15:03,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492188841] [2021-10-28 23:15:03,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492188841] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:03,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:15:03,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-10-28 23:15:03,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044562384] [2021-10-28 23:15:03,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 23:15:03,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:03,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 23:15:03,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-10-28 23:15:03,491 INFO L87 Difference]: Start difference. First operand 132 states and 156 transitions. Second operand has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 27 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:03,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:03,864 INFO L93 Difference]: Finished difference Result 141 states and 166 transitions. [2021-10-28 23:15:03,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-28 23:15:03,865 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 27 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-10-28 23:15:03,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:03,866 INFO L225 Difference]: With dead ends: 141 [2021-10-28 23:15:03,867 INFO L226 Difference]: Without dead ends: 137 [2021-10-28 23:15:03,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1001, Invalid=1651, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 23:15:03,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-10-28 23:15:03,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-10-28 23:15:03,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.1911764705882353) internal successors, (162), 136 states have internal predecessors, (162), 0 states have call successors, (0), 0 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 23:15:03,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 162 transitions. [2021-10-28 23:15:03,878 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 162 transitions. Word has length 131 [2021-10-28 23:15:03,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:03,879 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 162 transitions. [2021-10-28 23:15:03,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 27 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:03,880 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 162 transitions. [2021-10-28 23:15:03,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-10-28 23:15:03,881 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:03,881 INFO L513 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:03,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:04,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 23:15:04,106 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:04,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:04,106 INFO L85 PathProgramCache]: Analyzing trace with hash 150906713, now seen corresponding path program 25 times [2021-10-28 23:15:04,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:04,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288943109] [2021-10-28 23:15:04,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:04,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:04,122 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:15:04,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263742541] [2021-10-28 23:15:04,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:15:04,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:04,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:04,125 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:04,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-28 23:15:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:04,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 53 conjunts are in the unsatisfiable core [2021-10-28 23:15:04,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:05,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:05,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:05,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288943109] [2021-10-28 23:15:05,522 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:15:05,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263742541] [2021-10-28 23:15:05,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263742541] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:05,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:15:05,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-10-28 23:15:05,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138497098] [2021-10-28 23:15:05,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 23:15:05,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:05,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 23:15:05,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-10-28 23:15:05,524 INFO L87 Difference]: Start difference. First operand 137 states and 162 transitions. Second operand has 29 states, 29 states have (on average 4.689655172413793) internal successors, (136), 28 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 23:15:05,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:05,973 INFO L93 Difference]: Finished difference Result 146 states and 172 transitions. [2021-10-28 23:15:05,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-28 23:15:05,973 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.689655172413793) internal successors, (136), 28 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2021-10-28 23:15:05,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:05,974 INFO L225 Difference]: With dead ends: 146 [2021-10-28 23:15:05,974 INFO L226 Difference]: Without dead ends: 142 [2021-10-28 23:15:05,976 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1080, Invalid=1782, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 23:15:05,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-28 23:15:05,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-10-28 23:15:05,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.1914893617021276) internal successors, (168), 141 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 23:15:05,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 168 transitions. [2021-10-28 23:15:05,985 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 168 transitions. Word has length 136 [2021-10-28 23:15:05,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:05,985 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 168 transitions. [2021-10-28 23:15:05,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.689655172413793) internal successors, (136), 28 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 23:15:05,986 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 168 transitions. [2021-10-28 23:15:05,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-10-28 23:15:05,986 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:05,987 INFO L513 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:06,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:06,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 23:15:06,194 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:06,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:06,194 INFO L85 PathProgramCache]: Analyzing trace with hash -158441877, now seen corresponding path program 26 times [2021-10-28 23:15:06,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:06,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342679161] [2021-10-28 23:15:06,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:06,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:06,204 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:15:06,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771261195] [2021-10-28 23:15:06,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:15:06,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:06,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:06,208 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:06,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-28 23:15:06,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:15:06,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:06,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-28 23:15:06,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:07,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:07,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342679161] [2021-10-28 23:15:07,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:15:07,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771261195] [2021-10-28 23:15:07,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771261195] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:07,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:15:07,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-10-28 23:15:07,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847060439] [2021-10-28 23:15:07,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-28 23:15:07,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:07,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-28 23:15:07,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-10-28 23:15:07,592 INFO L87 Difference]: Start difference. First operand 142 states and 168 transitions. Second operand has 30 states, 30 states have (on average 4.7) internal successors, (141), 29 states have internal predecessors, (141), 0 states have call successors, (0), 0 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 23:15:08,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:08,002 INFO L93 Difference]: Finished difference Result 151 states and 178 transitions. [2021-10-28 23:15:08,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-10-28 23:15:08,002 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.7) internal successors, (141), 29 states have internal predecessors, (141), 0 states have call successors, (0), 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 141 [2021-10-28 23:15:08,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:08,003 INFO L225 Difference]: With dead ends: 151 [2021-10-28 23:15:08,003 INFO L226 Difference]: Without dead ends: 147 [2021-10-28 23:15:08,005 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1162, Invalid=1918, Unknown=0, NotChecked=0, Total=3080 [2021-10-28 23:15:08,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-28 23:15:08,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-10-28 23:15:08,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.1917808219178083) internal successors, (174), 146 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 23:15:08,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 174 transitions. [2021-10-28 23:15:08,013 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 174 transitions. Word has length 141 [2021-10-28 23:15:08,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:08,013 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 174 transitions. [2021-10-28 23:15:08,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.7) internal successors, (141), 29 states have internal predecessors, (141), 0 states have call successors, (0), 0 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 23:15:08,013 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 174 transitions. [2021-10-28 23:15:08,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-10-28 23:15:08,014 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:08,015 INFO L513 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:08,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:08,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:08,221 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:08,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:08,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1880079719, now seen corresponding path program 27 times [2021-10-28 23:15:08,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:08,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143542169] [2021-10-28 23:15:08,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:08,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:08,231 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:15:08,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439428676] [2021-10-28 23:15:08,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:15:08,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:08,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:08,237 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:08,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-28 23:15:09,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-10-28 23:15:09,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:09,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-28 23:15:09,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:09,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:09,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:09,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143542169] [2021-10-28 23:15:09,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:15:09,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439428676] [2021-10-28 23:15:09,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439428676] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:09,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:15:09,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-10-28 23:15:09,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891743077] [2021-10-28 23:15:09,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-28 23:15:09,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:09,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-28 23:15:09,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-10-28 23:15:09,768 INFO L87 Difference]: Start difference. First operand 147 states and 174 transitions. Second operand has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 30 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 23:15:10,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:10,207 INFO L93 Difference]: Finished difference Result 156 states and 184 transitions. [2021-10-28 23:15:10,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-10-28 23:15:10,208 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 30 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2021-10-28 23:15:10,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:10,209 INFO L225 Difference]: With dead ends: 156 [2021-10-28 23:15:10,209 INFO L226 Difference]: Without dead ends: 152 [2021-10-28 23:15:10,210 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 116 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 23:15:10,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-28 23:15:10,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-10-28 23:15:10,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.1920529801324504) internal successors, (180), 151 states have internal predecessors, (180), 0 states have call successors, (0), 0 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 23:15:10,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 180 transitions. [2021-10-28 23:15:10,217 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 180 transitions. Word has length 146 [2021-10-28 23:15:10,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:10,218 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 180 transitions. [2021-10-28 23:15:10,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 30 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 23:15:10,218 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 180 transitions. [2021-10-28 23:15:10,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-10-28 23:15:10,219 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:10,220 INFO L513 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:10,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-10-28 23:15:10,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-28 23:15:10,430 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:10,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:10,430 INFO L85 PathProgramCache]: Analyzing trace with hash 177982251, now seen corresponding path program 28 times [2021-10-28 23:15:10,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:10,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387484335] [2021-10-28 23:15:10,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:10,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:10,451 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:15:10,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99820632] [2021-10-28 23:15:10,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:15:10,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:10,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:10,453 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:10,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-28 23:15:11,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:15:11,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:11,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-28 23:15:11,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:11,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:11,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387484335] [2021-10-28 23:15:11,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:15:11,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99820632] [2021-10-28 23:15:11,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99820632] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:11,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:15:11,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-10-28 23:15:11,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857761618] [2021-10-28 23:15:11,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 23:15:11,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:11,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 23:15:11,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:15:11,952 INFO L87 Difference]: Start difference. First operand 152 states and 180 transitions. Second operand has 32 states, 32 states have (on average 4.71875) internal successors, (151), 31 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 23:15:12,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:12,489 INFO L93 Difference]: Finished difference Result 161 states and 190 transitions. [2021-10-28 23:15:12,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-10-28 23:15:12,489 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.71875) internal successors, (151), 31 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 23:15:12,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:12,491 INFO L225 Difference]: With dead ends: 161 [2021-10-28 23:15:12,491 INFO L226 Difference]: Without dead ends: 157 [2021-10-28 23:15:12,493 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 120 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 23:15:12,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-10-28 23:15:12,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-10-28 23:15:12,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.1923076923076923) internal successors, (186), 156 states have internal predecessors, (186), 0 states have call successors, (0), 0 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 23:15:12,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 186 transitions. [2021-10-28 23:15:12,504 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 186 transitions. Word has length 151 [2021-10-28 23:15:12,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:12,505 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 186 transitions. [2021-10-28 23:15:12,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.71875) internal successors, (151), 31 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 23:15:12,505 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 186 transitions. [2021-10-28 23:15:12,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-10-28 23:15:12,506 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:12,506 INFO L513 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:12,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:12,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:12,724 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:12,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:12,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1895248423, now seen corresponding path program 29 times [2021-10-28 23:15:12,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:12,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382185041] [2021-10-28 23:15:12,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:12,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:12,734 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:15:12,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1513535494] [2021-10-28 23:15:12,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:15:12,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:12,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:12,737 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:12,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-28 23:15:13,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-10-28 23:15:13,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:13,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 61 conjunts are in the unsatisfiable core [2021-10-28 23:15:13,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:14,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:14,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:14,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382185041] [2021-10-28 23:15:14,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:15:14,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513535494] [2021-10-28 23:15:14,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513535494] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:14,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:15:14,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-10-28 23:15:14,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833263791] [2021-10-28 23:15:14,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-28 23:15:14,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:14,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-28 23:15:14,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 23:15:14,459 INFO L87 Difference]: Start difference. First operand 157 states and 186 transitions. Second operand has 33 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 32 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 23:15:15,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:15,070 INFO L93 Difference]: Finished difference Result 166 states and 196 transitions. [2021-10-28 23:15:15,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-10-28 23:15:15,071 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 32 states have internal predecessors, (156), 0 states have call successors, (0), 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 156 [2021-10-28 23:15:15,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:15,072 INFO L225 Difference]: With dead ends: 166 [2021-10-28 23:15:15,073 INFO L226 Difference]: Without dead ends: 162 [2021-10-28 23:15:15,074 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1426, Invalid=2356, Unknown=0, NotChecked=0, Total=3782 [2021-10-28 23:15:15,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-10-28 23:15:15,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-10-28 23:15:15,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.1925465838509317) internal successors, (192), 161 states have internal predecessors, (192), 0 states have call successors, (0), 0 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 23:15:15,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 192 transitions. [2021-10-28 23:15:15,087 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 192 transitions. Word has length 156 [2021-10-28 23:15:15,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:15,087 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 192 transitions. [2021-10-28 23:15:15,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 32 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 23:15:15,088 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 192 transitions. [2021-10-28 23:15:15,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-10-28 23:15:15,089 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:15,089 INFO L513 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:15,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:15,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:15,310 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:15,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:15,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1498957803, now seen corresponding path program 30 times [2021-10-28 23:15:15,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:15,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224491959] [2021-10-28 23:15:15,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:15,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:15,326 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:15:15,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966112701] [2021-10-28 23:15:15,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:15:15,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:15,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:15,328 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:15,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-28 23:15:16,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-10-28 23:15:16,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:16,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 63 conjunts are in the unsatisfiable core [2021-10-28 23:15:16,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:17,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:17,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224491959] [2021-10-28 23:15:17,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:15:17,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966112701] [2021-10-28 23:15:17,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966112701] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:17,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:15:17,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-10-28 23:15:17,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680619275] [2021-10-28 23:15:17,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-28 23:15:17,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:17,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-28 23:15:17,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 23:15:17,218 INFO L87 Difference]: Start difference. First operand 162 states and 192 transitions. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 33 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 23:15:17,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:17,835 INFO L93 Difference]: Finished difference Result 171 states and 202 transitions. [2021-10-28 23:15:17,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-10-28 23:15:17,835 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 33 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) Word has length 161 [2021-10-28 23:15:17,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:17,837 INFO L225 Difference]: With dead ends: 171 [2021-10-28 23:15:17,837 INFO L226 Difference]: Without dead ends: 167 [2021-10-28 23:15:17,839 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1520, Invalid=2512, Unknown=0, NotChecked=0, Total=4032 [2021-10-28 23:15:17,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-10-28 23:15:17,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-10-28 23:15:17,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1927710843373494) internal successors, (198), 166 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 23:15:17,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 198 transitions. [2021-10-28 23:15:17,850 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 198 transitions. Word has length 161 [2021-10-28 23:15:17,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:17,851 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 198 transitions. [2021-10-28 23:15:17,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 33 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 23:15:17,852 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 198 transitions. [2021-10-28 23:15:17,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-10-28 23:15:17,853 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:17,853 INFO L513 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:17,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:18,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:18,070 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:18,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:18,070 INFO L85 PathProgramCache]: Analyzing trace with hash -161724135, now seen corresponding path program 31 times [2021-10-28 23:15:18,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:18,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178511673] [2021-10-28 23:15:18,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:18,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:18,092 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:15:18,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201613509] [2021-10-28 23:15:18,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:15:18,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:18,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:18,094 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:18,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-28 23:15:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:19,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-28 23:15:19,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:19,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:19,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178511673] [2021-10-28 23:15:19,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:15:19,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201613509] [2021-10-28 23:15:19,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201613509] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:19,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:15:19,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-10-28 23:15:19,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221818700] [2021-10-28 23:15:19,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 23:15:19,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:19,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 23:15:19,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 23:15:19,948 INFO L87 Difference]: Start difference. First operand 167 states and 198 transitions. Second operand has 35 states, 35 states have (on average 4.742857142857143) internal successors, (166), 34 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 23:15:20,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:20,517 INFO L93 Difference]: Finished difference Result 176 states and 208 transitions. [2021-10-28 23:15:20,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-10-28 23:15:20,518 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.742857142857143) internal successors, (166), 34 states have internal predecessors, (166), 0 states have call successors, (0), 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 166 [2021-10-28 23:15:20,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:20,520 INFO L225 Difference]: With dead ends: 176 [2021-10-28 23:15:20,520 INFO L226 Difference]: Without dead ends: 172 [2021-10-28 23:15:20,522 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1617, Invalid=2673, Unknown=0, NotChecked=0, Total=4290 [2021-10-28 23:15:20,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-10-28 23:15:20,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2021-10-28 23:15:20,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.1929824561403508) internal successors, (204), 171 states have internal predecessors, (204), 0 states have call successors, (0), 0 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 23:15:20,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 204 transitions. [2021-10-28 23:15:20,533 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 204 transitions. Word has length 166 [2021-10-28 23:15:20,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:20,534 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 204 transitions. [2021-10-28 23:15:20,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.742857142857143) internal successors, (166), 34 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 23:15:20,534 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 204 transitions. [2021-10-28 23:15:20,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-10-28 23:15:20,535 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:20,535 INFO L513 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:20,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:20,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-28 23:15:20,750 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:20,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:20,750 INFO L85 PathProgramCache]: Analyzing trace with hash -550513493, now seen corresponding path program 32 times [2021-10-28 23:15:20,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:20,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161907109] [2021-10-28 23:15:20,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:20,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:20,802 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:15:20,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666645596] [2021-10-28 23:15:20,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:15:20,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:20,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:20,816 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:20,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-28 23:15:22,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:15:22,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:22,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 67 conjunts are in the unsatisfiable core [2021-10-28 23:15:22,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:22,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:22,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161907109] [2021-10-28 23:15:22,965 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:15:22,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666645596] [2021-10-28 23:15:22,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666645596] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:22,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:15:22,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-10-28 23:15:22,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962201918] [2021-10-28 23:15:22,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-28 23:15:22,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:22,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-28 23:15:22,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 23:15:22,968 INFO L87 Difference]: Start difference. First operand 172 states and 204 transitions. Second operand has 36 states, 36 states have (on average 4.75) internal successors, (171), 35 states have internal predecessors, (171), 0 states have call successors, (0), 0 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 23:15:23,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:23,573 INFO L93 Difference]: Finished difference Result 181 states and 214 transitions. [2021-10-28 23:15:23,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-10-28 23:15:23,573 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.75) internal successors, (171), 35 states have internal predecessors, (171), 0 states have call successors, (0), 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 171 [2021-10-28 23:15:23,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:23,574 INFO L225 Difference]: With dead ends: 181 [2021-10-28 23:15:23,574 INFO L226 Difference]: Without dead ends: 177 [2021-10-28 23:15:23,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1717, Invalid=2839, Unknown=0, NotChecked=0, Total=4556 [2021-10-28 23:15:23,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-10-28 23:15:23,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-10-28 23:15:23,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.1931818181818181) internal successors, (210), 176 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 23:15:23,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 210 transitions. [2021-10-28 23:15:23,586 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 210 transitions. Word has length 171 [2021-10-28 23:15:23,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:23,587 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 210 transitions. [2021-10-28 23:15:23,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.75) internal successors, (171), 35 states have internal predecessors, (171), 0 states have call successors, (0), 0 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 23:15:23,587 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 210 transitions. [2021-10-28 23:15:23,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-10-28 23:15:23,588 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:23,589 INFO L513 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:23,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-10-28 23:15:23,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-28 23:15:23,802 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:23,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:23,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1392593831, now seen corresponding path program 33 times [2021-10-28 23:15:23,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:23,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917568137] [2021-10-28 23:15:23,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:23,803 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:23,814 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:15:23,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1511470034] [2021-10-28 23:15:23,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:15:23,815 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:23,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:23,820 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:23,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-28 23:15:24,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-10-28 23:15:24,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:24,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 69 conjunts are in the unsatisfiable core [2021-10-28 23:15:24,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:25,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:25,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917568137] [2021-10-28 23:15:25,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:15:25,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511470034] [2021-10-28 23:15:25,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511470034] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:25,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:15:25,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-10-28 23:15:25,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012925097] [2021-10-28 23:15:25,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-28 23:15:25,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:25,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-28 23:15:25,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 23:15:25,974 INFO L87 Difference]: Start difference. First operand 177 states and 210 transitions. Second operand has 37 states, 37 states have (on average 4.756756756756757) internal successors, (176), 36 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:26,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:26,536 INFO L93 Difference]: Finished difference Result 186 states and 220 transitions. [2021-10-28 23:15:26,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-10-28 23:15:26,537 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.756756756756757) internal successors, (176), 36 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2021-10-28 23:15:26,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:26,538 INFO L225 Difference]: With dead ends: 186 [2021-10-28 23:15:26,538 INFO L226 Difference]: Without dead ends: 182 [2021-10-28 23:15:26,539 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1820, Invalid=3010, Unknown=0, NotChecked=0, Total=4830 [2021-10-28 23:15:26,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-10-28 23:15:26,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-10-28 23:15:26,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.1933701657458564) internal successors, (216), 181 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:26,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 216 transitions. [2021-10-28 23:15:26,550 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 216 transitions. Word has length 176 [2021-10-28 23:15:26,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:26,550 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 216 transitions. [2021-10-28 23:15:26,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.756756756756757) internal successors, (176), 36 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:26,551 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 216 transitions. [2021-10-28 23:15:26,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-10-28 23:15:26,552 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:26,552 INFO L513 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:26,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:26,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-28 23:15:26,770 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:26,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:26,771 INFO L85 PathProgramCache]: Analyzing trace with hash 26112363, now seen corresponding path program 34 times [2021-10-28 23:15:26,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:26,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171435961] [2021-10-28 23:15:26,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:26,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:26,786 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:15:26,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1214909934] [2021-10-28 23:15:26,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:15:26,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:26,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:26,788 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:26,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-28 23:15:27,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:15:27,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:27,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 71 conjunts are in the unsatisfiable core [2021-10-28 23:15:27,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:28,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:28,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171435961] [2021-10-28 23:15:28,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:15:28,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214909934] [2021-10-28 23:15:28,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214909934] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:28,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:15:28,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2021-10-28 23:15:28,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508149832] [2021-10-28 23:15:28,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-28 23:15:28,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:28,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-28 23:15:28,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 23:15:28,807 INFO L87 Difference]: Start difference. First operand 182 states and 216 transitions. Second operand has 38 states, 38 states have (on average 4.7631578947368425) internal successors, (181), 37 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 23:15:29,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:29,431 INFO L93 Difference]: Finished difference Result 191 states and 226 transitions. [2021-10-28 23:15:29,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-10-28 23:15:29,432 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.7631578947368425) internal successors, (181), 37 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 23:15:29,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:29,434 INFO L225 Difference]: With dead ends: 191 [2021-10-28 23:15:29,434 INFO L226 Difference]: Without dead ends: 187 [2021-10-28 23:15:29,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 144 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 23:15:29,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-10-28 23:15:29,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2021-10-28 23:15:29,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.1935483870967742) internal successors, (222), 186 states have internal predecessors, (222), 0 states have call successors, (0), 0 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 23:15:29,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 222 transitions. [2021-10-28 23:15:29,447 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 222 transitions. Word has length 181 [2021-10-28 23:15:29,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:29,458 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 222 transitions. [2021-10-28 23:15:29,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.7631578947368425) internal successors, (181), 37 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 23:15:29,458 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 222 transitions. [2021-10-28 23:15:29,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-10-28 23:15:29,459 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:29,460 INFO L513 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:29,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-10-28 23:15:29,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-28 23:15:29,670 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:29,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:29,670 INFO L85 PathProgramCache]: Analyzing trace with hash -788263015, now seen corresponding path program 35 times [2021-10-28 23:15:29,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:29,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792408956] [2021-10-28 23:15:29,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:29,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:29,688 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:15:29,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376926645] [2021-10-28 23:15:29,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:15:29,688 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:29,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:29,690 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:29,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-28 23:15:30,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-10-28 23:15:30,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:30,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 73 conjunts are in the unsatisfiable core [2021-10-28 23:15:30,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:31,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:31,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792408956] [2021-10-28 23:15:31,905 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:15:31,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376926645] [2021-10-28 23:15:31,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376926645] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:31,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:15:31,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-10-28 23:15:31,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439577641] [2021-10-28 23:15:31,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-28 23:15:31,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:31,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-28 23:15:31,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 23:15:31,908 INFO L87 Difference]: Start difference. First operand 187 states and 222 transitions. Second operand has 39 states, 39 states have (on average 4.769230769230769) internal successors, (186), 38 states have internal predecessors, (186), 0 states have call successors, (0), 0 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 23:15:32,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:32,634 INFO L93 Difference]: Finished difference Result 196 states and 232 transitions. [2021-10-28 23:15:32,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-10-28 23:15:32,635 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.769230769230769) internal successors, (186), 38 states have internal predecessors, (186), 0 states have call successors, (0), 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 186 [2021-10-28 23:15:32,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:32,636 INFO L225 Difference]: With dead ends: 196 [2021-10-28 23:15:32,636 INFO L226 Difference]: Without dead ends: 192 [2021-10-28 23:15:32,637 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 148 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 23:15:32,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-10-28 23:15:32,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-10-28 23:15:32,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.193717277486911) internal successors, (228), 191 states have internal predecessors, (228), 0 states have call successors, (0), 0 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 23:15:32,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 228 transitions. [2021-10-28 23:15:32,651 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 228 transitions. Word has length 186 [2021-10-28 23:15:32,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:32,652 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 228 transitions. [2021-10-28 23:15:32,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.769230769230769) internal successors, (186), 38 states have internal predecessors, (186), 0 states have call successors, (0), 0 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 23:15:32,652 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 228 transitions. [2021-10-28 23:15:32,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-10-28 23:15:32,654 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:32,654 INFO L513 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:32,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:32,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:32,875 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:32,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:32,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1323310635, now seen corresponding path program 36 times [2021-10-28 23:15:32,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:32,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559777596] [2021-10-28 23:15:32,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:32,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:32,905 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:15:32,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [295010606] [2021-10-28 23:15:32,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:15:32,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:32,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:32,907 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:32,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-28 23:15:34,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-10-28 23:15:34,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:34,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 75 conjunts are in the unsatisfiable core [2021-10-28 23:15:34,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:35,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:35,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559777596] [2021-10-28 23:15:35,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:15:35,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295010606] [2021-10-28 23:15:35,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295010606] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:35,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:15:35,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-10-28 23:15:35,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808583827] [2021-10-28 23:15:35,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-28 23:15:35,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:35,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-28 23:15:35,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 23:15:35,400 INFO L87 Difference]: Start difference. First operand 192 states and 228 transitions. Second operand has 40 states, 40 states have (on average 4.775) internal successors, (191), 39 states have internal predecessors, (191), 0 states have call successors, (0), 0 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 23:15:36,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:36,142 INFO L93 Difference]: Finished difference Result 201 states and 238 transitions. [2021-10-28 23:15:36,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-10-28 23:15:36,143 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.775) internal successors, (191), 39 states have internal predecessors, (191), 0 states have call successors, (0), 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 191 [2021-10-28 23:15:36,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:36,144 INFO L225 Difference]: With dead ends: 201 [2021-10-28 23:15:36,144 INFO L226 Difference]: Without dead ends: 197 [2021-10-28 23:15:36,145 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2147, Invalid=3553, Unknown=0, NotChecked=0, Total=5700 [2021-10-28 23:15:36,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-10-28 23:15:36,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-10-28 23:15:36,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.1938775510204083) internal successors, (234), 196 states have internal predecessors, (234), 0 states have call successors, (0), 0 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 23:15:36,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 234 transitions. [2021-10-28 23:15:36,155 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 234 transitions. Word has length 191 [2021-10-28 23:15:36,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:36,155 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 234 transitions. [2021-10-28 23:15:36,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.775) internal successors, (191), 39 states have internal predecessors, (191), 0 states have call successors, (0), 0 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 23:15:36,156 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 234 transitions. [2021-10-28 23:15:36,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-10-28 23:15:36,157 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:36,157 INFO L513 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:36,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:36,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-28 23:15:36,370 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:36,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:36,370 INFO L85 PathProgramCache]: Analyzing trace with hash -142583079, now seen corresponding path program 37 times [2021-10-28 23:15:36,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:36,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751901320] [2021-10-28 23:15:36,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:36,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:36,388 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:15:36,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703932439] [2021-10-28 23:15:36,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:15:36,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:36,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:36,390 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:36,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-28 23:15:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:37,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 77 conjunts are in the unsatisfiable core [2021-10-28 23:15:37,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:38,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:38,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751901320] [2021-10-28 23:15:38,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:15:38,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703932439] [2021-10-28 23:15:38,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703932439] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:38,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:15:38,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2021-10-28 23:15:38,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529514707] [2021-10-28 23:15:38,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-28 23:15:38,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:38,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-28 23:15:38,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 23:15:38,714 INFO L87 Difference]: Start difference. First operand 197 states and 234 transitions. Second operand has 41 states, 41 states have (on average 4.780487804878049) internal successors, (196), 40 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 23:15:39,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:39,525 INFO L93 Difference]: Finished difference Result 206 states and 244 transitions. [2021-10-28 23:15:39,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-10-28 23:15:39,526 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.780487804878049) internal successors, (196), 40 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) Word has length 196 [2021-10-28 23:15:39,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:39,527 INFO L225 Difference]: With dead ends: 206 [2021-10-28 23:15:39,527 INFO L226 Difference]: Without dead ends: 202 [2021-10-28 23:15:39,529 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2262, Invalid=3744, Unknown=0, NotChecked=0, Total=6006 [2021-10-28 23:15:39,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-10-28 23:15:39,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2021-10-28 23:15:39,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.1940298507462686) internal successors, (240), 201 states have internal predecessors, (240), 0 states have call successors, (0), 0 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 23:15:39,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 240 transitions. [2021-10-28 23:15:39,540 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 240 transitions. Word has length 196 [2021-10-28 23:15:39,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:39,540 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 240 transitions. [2021-10-28 23:15:39,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.780487804878049) internal successors, (196), 40 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 23:15:39,541 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 240 transitions. [2021-10-28 23:15:39,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-10-28 23:15:39,542 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:39,542 INFO L513 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:39,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:39,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:39,766 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:39,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:39,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1049680619, now seen corresponding path program 38 times [2021-10-28 23:15:39,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:39,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800026170] [2021-10-28 23:15:39,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:39,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:39,782 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:15:39,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582809850] [2021-10-28 23:15:39,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:15:39,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:39,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:39,783 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:39,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-28 23:15:41,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:15:41,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:41,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 79 conjunts are in the unsatisfiable core [2021-10-28 23:15:41,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:42,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:42,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800026170] [2021-10-28 23:15:42,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:15:42,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582809850] [2021-10-28 23:15:42,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582809850] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:42,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:15:42,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-10-28 23:15:42,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534966114] [2021-10-28 23:15:42,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-28 23:15:42,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:42,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-28 23:15:42,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 23:15:42,188 INFO L87 Difference]: Start difference. First operand 202 states and 240 transitions. Second operand has 42 states, 42 states have (on average 4.785714285714286) internal successors, (201), 41 states have internal predecessors, (201), 0 states have call successors, (0), 0 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 23:15:42,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:42,964 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2021-10-28 23:15:42,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-10-28 23:15:42,965 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.785714285714286) internal successors, (201), 41 states have internal predecessors, (201), 0 states have call successors, (0), 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 201 [2021-10-28 23:15:42,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:42,966 INFO L225 Difference]: With dead ends: 211 [2021-10-28 23:15:42,966 INFO L226 Difference]: Without dead ends: 207 [2021-10-28 23:15:42,967 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 160 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 23:15:42,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-10-28 23:15:42,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2021-10-28 23:15:42,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.1941747572815533) internal successors, (246), 206 states have internal predecessors, (246), 0 states have call successors, (0), 0 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 23:15:42,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 246 transitions. [2021-10-28 23:15:42,978 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 246 transitions. Word has length 201 [2021-10-28 23:15:42,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:42,978 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 246 transitions. [2021-10-28 23:15:42,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.785714285714286) internal successors, (201), 41 states have internal predecessors, (201), 0 states have call successors, (0), 0 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 23:15:42,979 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 246 transitions. [2021-10-28 23:15:42,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-10-28 23:15:42,980 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:42,980 INFO L513 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:43,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:43,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:43,194 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:43,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:43,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1820825113, now seen corresponding path program 39 times [2021-10-28 23:15:43,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:43,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826333824] [2021-10-28 23:15:43,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:43,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:43,209 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:15:43,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1861530957] [2021-10-28 23:15:43,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:15:43,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:43,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:43,210 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:43,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-28 23:15:44,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-10-28 23:15:44,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:44,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 81 conjunts are in the unsatisfiable core [2021-10-28 23:15:44,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:45,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:45,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826333824] [2021-10-28 23:15:45,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:15:45,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861530957] [2021-10-28 23:15:45,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861530957] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:45,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:15:45,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2021-10-28 23:15:45,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207241789] [2021-10-28 23:15:45,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-28 23:15:45,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:45,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-28 23:15:45,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-10-28 23:15:45,914 INFO L87 Difference]: Start difference. First operand 207 states and 246 transitions. Second operand has 43 states, 43 states have (on average 4.790697674418604) internal successors, (206), 42 states have internal predecessors, (206), 0 states have call successors, (0), 0 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 23:15:46,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:46,725 INFO L93 Difference]: Finished difference Result 216 states and 256 transitions. [2021-10-28 23:15:46,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-10-28 23:15:46,725 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.790697674418604) internal successors, (206), 42 states have internal predecessors, (206), 0 states have call successors, (0), 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 206 [2021-10-28 23:15:46,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:46,726 INFO L225 Difference]: With dead ends: 216 [2021-10-28 23:15:46,727 INFO L226 Difference]: Without dead ends: 212 [2021-10-28 23:15:46,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2501, Invalid=4141, Unknown=0, NotChecked=0, Total=6642 [2021-10-28 23:15:46,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-10-28 23:15:46,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-10-28 23:15:46,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.1943127962085307) internal successors, (252), 211 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 23:15:46,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 252 transitions. [2021-10-28 23:15:46,739 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 252 transitions. Word has length 206 [2021-10-28 23:15:46,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:46,739 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 252 transitions. [2021-10-28 23:15:46,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.790697674418604) internal successors, (206), 42 states have internal predecessors, (206), 0 states have call successors, (0), 0 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 23:15:46,740 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 252 transitions. [2021-10-28 23:15:46,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-10-28 23:15:46,741 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:46,741 INFO L513 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:46,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-10-28 23:15:46,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-10-28 23:15:46,970 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:46,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:46,970 INFO L85 PathProgramCache]: Analyzing trace with hash -250828885, now seen corresponding path program 40 times [2021-10-28 23:15:46,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:46,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366076709] [2021-10-28 23:15:46,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:46,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:47,000 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:15:47,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577387476] [2021-10-28 23:15:47,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:15:47,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:47,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:47,002 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:47,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-28 23:15:48,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:15:48,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:48,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 83 conjunts are in the unsatisfiable core [2021-10-28 23:15:48,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:49,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:49,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366076709] [2021-10-28 23:15:49,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:15:49,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577387476] [2021-10-28 23:15:49,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577387476] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:49,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:15:49,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2021-10-28 23:15:49,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479241113] [2021-10-28 23:15:49,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-28 23:15:49,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:49,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-28 23:15:49,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 23:15:49,594 INFO L87 Difference]: Start difference. First operand 212 states and 252 transitions. Second operand has 44 states, 44 states have (on average 4.795454545454546) internal successors, (211), 43 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 23:15:50,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:50,424 INFO L93 Difference]: Finished difference Result 221 states and 262 transitions. [2021-10-28 23:15:50,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-10-28 23:15:50,428 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.795454545454546) internal successors, (211), 43 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 23:15:50,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:50,430 INFO L225 Difference]: With dead ends: 221 [2021-10-28 23:15:50,430 INFO L226 Difference]: Without dead ends: 217 [2021-10-28 23:15:50,432 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 168 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 23:15:50,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-10-28 23:15:50,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-10-28 23:15:50,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.1944444444444444) internal successors, (258), 216 states have internal predecessors, (258), 0 states have call successors, (0), 0 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 23:15:50,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 258 transitions. [2021-10-28 23:15:50,443 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 258 transitions. Word has length 211 [2021-10-28 23:15:50,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:50,444 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 258 transitions. [2021-10-28 23:15:50,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.795454545454546) internal successors, (211), 43 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 23:15:50,444 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 258 transitions. [2021-10-28 23:15:50,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-10-28 23:15:50,445 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:50,446 INFO L513 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:50,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-10-28 23:15:50,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-10-28 23:15:50,670 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:50,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:50,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1932378457, now seen corresponding path program 41 times [2021-10-28 23:15:50,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:50,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241214546] [2021-10-28 23:15:50,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:50,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:50,685 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:15:50,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666867787] [2021-10-28 23:15:50,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:15:50,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:50,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:50,686 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:50,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-28 23:15:52,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-10-28 23:15:52,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:52,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 85 conjunts are in the unsatisfiable core [2021-10-28 23:15:52,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:53,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 4182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:53,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:53,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241214546] [2021-10-28 23:15:53,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:15:53,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666867787] [2021-10-28 23:15:53,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666867787] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:53,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:15:53,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2021-10-28 23:15:53,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100113278] [2021-10-28 23:15:53,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-28 23:15:53,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:53,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-28 23:15:53,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-10-28 23:15:53,604 INFO L87 Difference]: Start difference. First operand 217 states and 258 transitions. Second operand has 45 states, 45 states have (on average 4.8) internal successors, (216), 44 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:54,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:54,435 INFO L93 Difference]: Finished difference Result 226 states and 268 transitions. [2021-10-28 23:15:54,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-10-28 23:15:54,435 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.8) internal successors, (216), 44 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 216 [2021-10-28 23:15:54,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:54,436 INFO L225 Difference]: With dead ends: 226 [2021-10-28 23:15:54,436 INFO L226 Difference]: Without dead ends: 222 [2021-10-28 23:15:54,437 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 172 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 23:15:54,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-10-28 23:15:54,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-10-28 23:15:54,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.1945701357466063) internal successors, (264), 221 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 23:15:54,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 264 transitions. [2021-10-28 23:15:54,444 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 264 transitions. Word has length 216 [2021-10-28 23:15:54,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:54,444 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 264 transitions. [2021-10-28 23:15:54,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.8) internal successors, (216), 44 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:54,444 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 264 transitions. [2021-10-28 23:15:54,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-10-28 23:15:54,445 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:54,445 INFO L513 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:54,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:54,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-10-28 23:15:54,646 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:54,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:54,646 INFO L85 PathProgramCache]: Analyzing trace with hash -272661397, now seen corresponding path program 42 times [2021-10-28 23:15:54,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:54,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341273231] [2021-10-28 23:15:54,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:54,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:54,662 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:15:54,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984103720] [2021-10-28 23:15:54,663 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:15:54,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:54,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:54,664 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:54,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-28 23:15:56,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-10-28 23:15:56,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:56,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 87 conjunts are in the unsatisfiable core [2021-10-28 23:15:56,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4389 backedges. 0 proven. 4389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:57,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:57,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341273231] [2021-10-28 23:15:57,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:15:57,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984103720] [2021-10-28 23:15:57,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984103720] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:57,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:15:57,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2021-10-28 23:15:57,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790727683] [2021-10-28 23:15:57,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-28 23:15:57,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:57,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-28 23:15:57,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-10-28 23:15:57,932 INFO L87 Difference]: Start difference. First operand 222 states and 264 transitions. Second operand has 46 states, 46 states have (on average 4.804347826086956) internal successors, (221), 45 states have internal predecessors, (221), 0 states have call successors, (0), 0 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 23:15:58,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:58,810 INFO L93 Difference]: Finished difference Result 231 states and 274 transitions. [2021-10-28 23:15:58,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-10-28 23:15:58,811 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.804347826086956) internal successors, (221), 45 states have internal predecessors, (221), 0 states have call successors, (0), 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 221 [2021-10-28 23:15:58,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:58,813 INFO L225 Difference]: With dead ends: 231 [2021-10-28 23:15:58,813 INFO L226 Difference]: Without dead ends: 227 [2021-10-28 23:15:58,814 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2882, Invalid=4774, Unknown=0, NotChecked=0, Total=7656 [2021-10-28 23:15:58,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-10-28 23:15:58,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2021-10-28 23:15:58,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.1946902654867257) internal successors, (270), 226 states have internal predecessors, (270), 0 states have call successors, (0), 0 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 23:15:58,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 270 transitions. [2021-10-28 23:15:58,825 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 270 transitions. Word has length 221 [2021-10-28 23:15:58,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:58,825 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 270 transitions. [2021-10-28 23:15:58,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.804347826086956) internal successors, (221), 45 states have internal predecessors, (221), 0 states have call successors, (0), 0 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 23:15:58,826 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 270 transitions. [2021-10-28 23:15:58,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-10-28 23:15:58,827 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:58,827 INFO L513 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:58,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:59,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-28 23:15:59,042 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:59,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:59,042 INFO L85 PathProgramCache]: Analyzing trace with hash -2054759271, now seen corresponding path program 43 times [2021-10-28 23:15:59,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:59,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995108311] [2021-10-28 23:15:59,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:59,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:59,080 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:15:59,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99800019] [2021-10-28 23:15:59,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:15:59,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:59,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:59,088 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:59,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-28 23:16:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:16:00,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 89 conjunts are in the unsatisfiable core [2021-10-28 23:16:00,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:16:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 0 proven. 4601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:16:01,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:01,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995108311] [2021-10-28 23:16:01,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:16:01,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99800019] [2021-10-28 23:16:01,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99800019] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:16:01,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:16:01,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2021-10-28 23:16:01,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464853557] [2021-10-28 23:16:01,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-10-28 23:16:01,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:01,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-10-28 23:16:01,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-10-28 23:16:01,981 INFO L87 Difference]: Start difference. First operand 227 states and 270 transitions. Second operand has 47 states, 47 states have (on average 4.808510638297872) internal successors, (226), 46 states have internal predecessors, (226), 0 states have call successors, (0), 0 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 23:16:02,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:02,871 INFO L93 Difference]: Finished difference Result 236 states and 280 transitions. [2021-10-28 23:16:02,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-10-28 23:16:02,872 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.808510638297872) internal successors, (226), 46 states have internal predecessors, (226), 0 states have call successors, (0), 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 226 [2021-10-28 23:16:02,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:02,873 INFO L225 Difference]: With dead ends: 236 [2021-10-28 23:16:02,873 INFO L226 Difference]: Without dead ends: 232 [2021-10-28 23:16:02,875 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3015, Invalid=4995, Unknown=0, NotChecked=0, Total=8010 [2021-10-28 23:16:02,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-10-28 23:16:02,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2021-10-28 23:16:02,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.1948051948051948) internal successors, (276), 231 states have internal predecessors, (276), 0 states have call successors, (0), 0 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 23:16:02,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 276 transitions. [2021-10-28 23:16:02,887 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 276 transitions. Word has length 226 [2021-10-28 23:16:02,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:02,888 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 276 transitions. [2021-10-28 23:16:02,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.808510638297872) internal successors, (226), 46 states have internal predecessors, (226), 0 states have call successors, (0), 0 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 23:16:02,888 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 276 transitions. [2021-10-28 23:16:02,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-10-28 23:16:02,890 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:02,890 INFO L513 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:16:02,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-28 23:16:03,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:03,118 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:03,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:03,118 INFO L85 PathProgramCache]: Analyzing trace with hash -317361877, now seen corresponding path program 44 times [2021-10-28 23:16:03,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:03,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636315617] [2021-10-28 23:16:03,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:03,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:03,170 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:03,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862383033] [2021-10-28 23:16:03,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:16:03,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:03,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:03,176 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:03,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-28 23:16:04,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:16:04,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:16:04,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 91 conjunts are in the unsatisfiable core [2021-10-28 23:16:04,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:16:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4818 backedges. 0 proven. 4818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:16:06,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:06,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636315617] [2021-10-28 23:16:06,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:16:06,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862383033] [2021-10-28 23:16:06,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862383033] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:16:06,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:16:06,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2021-10-28 23:16:06,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166662026] [2021-10-28 23:16:06,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-28 23:16:06,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:06,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-28 23:16:06,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 23:16:06,311 INFO L87 Difference]: Start difference. First operand 232 states and 276 transitions. Second operand has 48 states, 48 states have (on average 4.8125) internal successors, (231), 47 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 23:16:07,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:07,348 INFO L93 Difference]: Finished difference Result 241 states and 286 transitions. [2021-10-28 23:16:07,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-10-28 23:16:07,348 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.8125) internal successors, (231), 47 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) Word has length 231 [2021-10-28 23:16:07,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:07,355 INFO L225 Difference]: With dead ends: 241 [2021-10-28 23:16:07,355 INFO L226 Difference]: Without dead ends: 237 [2021-10-28 23:16:07,357 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 184 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 23:16:07,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-10-28 23:16:07,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2021-10-28 23:16:07,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.194915254237288) internal successors, (282), 236 states have internal predecessors, (282), 0 states have call successors, (0), 0 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 23:16:07,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 282 transitions. [2021-10-28 23:16:07,370 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 282 transitions. Word has length 231 [2021-10-28 23:16:07,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:07,370 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 282 transitions. [2021-10-28 23:16:07,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.8125) internal successors, (231), 47 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 23:16:07,370 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 282 transitions. [2021-10-28 23:16:07,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-10-28 23:16:07,372 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:07,372 INFO L513 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:16:07,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-28 23:16:07,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-28 23:16:07,598 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:07,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:07,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1801000999, now seen corresponding path program 45 times [2021-10-28 23:16:07,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:07,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343087151] [2021-10-28 23:16:07,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:07,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:07,641 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:07,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142295747] [2021-10-28 23:16:07,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:16:07,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:07,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:07,642 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:07,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-28 23:16:09,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-10-28 23:16:09,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:16:09,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 93 conjunts are in the unsatisfiable core [2021-10-28 23:16:09,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:16:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 0 proven. 5040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:16:10,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:10,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343087151] [2021-10-28 23:16:10,965 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:16:10,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142295747] [2021-10-28 23:16:10,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142295747] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:16:10,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:16:10,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2021-10-28 23:16:10,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130465826] [2021-10-28 23:16:10,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-28 23:16:10,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:10,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-28 23:16:10,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 23:16:10,967 INFO L87 Difference]: Start difference. First operand 237 states and 282 transitions. Second operand has 49 states, 49 states have (on average 4.816326530612245) internal successors, (236), 48 states have internal predecessors, (236), 0 states have call successors, (0), 0 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 23:16:11,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:11,987 INFO L93 Difference]: Finished difference Result 246 states and 292 transitions. [2021-10-28 23:16:11,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-10-28 23:16:11,987 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.816326530612245) internal successors, (236), 48 states have internal predecessors, (236), 0 states have call successors, (0), 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 236 [2021-10-28 23:16:11,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:11,991 INFO L225 Difference]: With dead ends: 246 [2021-10-28 23:16:11,991 INFO L226 Difference]: Without dead ends: 242 [2021-10-28 23:16:11,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3290, Invalid=5452, Unknown=0, NotChecked=0, Total=8742 [2021-10-28 23:16:11,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-28 23:16:12,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2021-10-28 23:16:12,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.1950207468879668) internal successors, (288), 241 states have internal predecessors, (288), 0 states have call successors, (0), 0 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 23:16:12,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 288 transitions. [2021-10-28 23:16:12,007 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 288 transitions. Word has length 236 [2021-10-28 23:16:12,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:12,008 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 288 transitions. [2021-10-28 23:16:12,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.816326530612245) internal successors, (236), 48 states have internal predecessors, (236), 0 states have call successors, (0), 0 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 23:16:12,008 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 288 transitions. [2021-10-28 23:16:12,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-10-28 23:16:12,010 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:12,010 INFO L513 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:16:12,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-28 23:16:12,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-28 23:16:12,230 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:12,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:12,230 INFO L85 PathProgramCache]: Analyzing trace with hash -2072351253, now seen corresponding path program 46 times [2021-10-28 23:16:12,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:12,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891530457] [2021-10-28 23:16:12,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:12,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:12,283 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:12,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949164610] [2021-10-28 23:16:12,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:16:12,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:12,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:12,293 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:12,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-28 23:16:14,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:16:14,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:16:14,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 95 conjunts are in the unsatisfiable core [2021-10-28 23:16:14,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:16:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:16:15,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:15,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891530457] [2021-10-28 23:16:15,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:16:15,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949164610] [2021-10-28 23:16:15,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949164610] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:16:15,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:16:15,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2021-10-28 23:16:15,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656256048] [2021-10-28 23:16:15,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-10-28 23:16:15,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:15,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-10-28 23:16:15,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 23:16:15,778 INFO L87 Difference]: Start difference. First operand 242 states and 288 transitions. Second operand has 50 states, 50 states have (on average 4.82) internal successors, (241), 49 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 23:16:16,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:16,804 INFO L93 Difference]: Finished difference Result 251 states and 298 transitions. [2021-10-28 23:16:16,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-10-28 23:16:16,805 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.82) internal successors, (241), 49 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 23:16:16,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:16,806 INFO L225 Difference]: With dead ends: 251 [2021-10-28 23:16:16,806 INFO L226 Difference]: Without dead ends: 247 [2021-10-28 23:16:16,808 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3432, Invalid=5688, Unknown=0, NotChecked=0, Total=9120 [2021-10-28 23:16:16,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-10-28 23:16:16,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2021-10-28 23:16:16,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.1951219512195121) internal successors, (294), 246 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 23:16:16,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 294 transitions. [2021-10-28 23:16:16,817 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 294 transitions. Word has length 241 [2021-10-28 23:16:16,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:16,817 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 294 transitions. [2021-10-28 23:16:16,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.82) internal successors, (241), 49 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 23:16:16,818 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 294 transitions. [2021-10-28 23:16:16,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-10-28 23:16:16,818 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:16,818 INFO L513 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:16:16,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-10-28 23:16:17,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:17,019 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:17,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:17,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1218568985, now seen corresponding path program 47 times [2021-10-28 23:16:17,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:17,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719818829] [2021-10-28 23:16:17,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:17,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:17,056 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:17,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482015386] [2021-10-28 23:16:17,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:16:17,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:17,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:17,062 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:17,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-28 23:16:19,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-10-28 23:16:19,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:16:19,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 97 conjunts are in the unsatisfiable core [2021-10-28 23:16:19,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:16:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 0 proven. 5499 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:16:20,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:20,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719818829] [2021-10-28 23:16:20,663 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:16:20,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482015386] [2021-10-28 23:16:20,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482015386] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:16:20,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:16:20,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2021-10-28 23:16:20,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597595630] [2021-10-28 23:16:20,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-28 23:16:20,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:20,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-28 23:16:20,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 23:16:20,665 INFO L87 Difference]: Start difference. First operand 247 states and 294 transitions. Second operand has 51 states, 51 states have (on average 4.823529411764706) internal successors, (246), 50 states have internal predecessors, (246), 0 states have call successors, (0), 0 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 23:16:21,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:21,712 INFO L93 Difference]: Finished difference Result 256 states and 304 transitions. [2021-10-28 23:16:21,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-10-28 23:16:21,713 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.823529411764706) internal successors, (246), 50 states have internal predecessors, (246), 0 states have call successors, (0), 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 246 [2021-10-28 23:16:21,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:21,715 INFO L225 Difference]: With dead ends: 256 [2021-10-28 23:16:21,715 INFO L226 Difference]: Without dead ends: 252 [2021-10-28 23:16:21,716 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3577, Invalid=5929, Unknown=0, NotChecked=0, Total=9506 [2021-10-28 23:16:21,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-10-28 23:16:21,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2021-10-28 23:16:21,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.1952191235059761) internal successors, (300), 251 states have internal predecessors, (300), 0 states have call successors, (0), 0 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 23:16:21,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 300 transitions. [2021-10-28 23:16:21,729 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 300 transitions. Word has length 246 [2021-10-28 23:16:21,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:21,729 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 300 transitions. [2021-10-28 23:16:21,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.823529411764706) internal successors, (246), 50 states have internal predecessors, (246), 0 states have call successors, (0), 0 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 23:16:21,730 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 300 transitions. [2021-10-28 23:16:21,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-10-28 23:16:21,731 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:21,732 INFO L513 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:16:21,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-10-28 23:16:21,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:21,958 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:21,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:21,958 INFO L85 PathProgramCache]: Analyzing trace with hash -94733653, now seen corresponding path program 48 times [2021-10-28 23:16:21,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:21,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96628605] [2021-10-28 23:16:21,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:21,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:22,013 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:22,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328854829] [2021-10-28 23:16:22,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:16:22,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:22,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:22,020 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:22,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-10-28 23:16:24,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-10-28 23:16:24,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:16:24,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 99 conjunts are in the unsatisfiable core [2021-10-28 23:16:24,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:16:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5736 backedges. 0 proven. 5736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:16:25,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:25,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96628605] [2021-10-28 23:16:25,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:16:25,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328854829] [2021-10-28 23:16:25,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328854829] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:16:25,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:16:25,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2021-10-28 23:16:25,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615226083] [2021-10-28 23:16:25,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-28 23:16:25,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:25,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-28 23:16:25,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 23:16:25,820 INFO L87 Difference]: Start difference. First operand 252 states and 300 transitions. Second operand has 52 states, 52 states have (on average 4.826923076923077) internal successors, (251), 51 states have internal predecessors, (251), 0 states have call successors, (0), 0 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 23:16:26,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:26,948 INFO L93 Difference]: Finished difference Result 261 states and 310 transitions. [2021-10-28 23:16:26,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-10-28 23:16:26,948 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.826923076923077) internal successors, (251), 51 states have internal predecessors, (251), 0 states have call successors, (0), 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 251 [2021-10-28 23:16:26,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:26,950 INFO L225 Difference]: With dead ends: 261 [2021-10-28 23:16:26,950 INFO L226 Difference]: Without dead ends: 257 [2021-10-28 23:16:26,950 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3725, Invalid=6175, Unknown=0, NotChecked=0, Total=9900 [2021-10-28 23:16:26,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-10-28 23:16:26,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2021-10-28 23:16:26,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.1953125) internal successors, (306), 256 states have internal predecessors, (306), 0 states have call successors, (0), 0 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 23:16:26,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 306 transitions. [2021-10-28 23:16:26,966 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 306 transitions. Word has length 251 [2021-10-28 23:16:26,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:26,966 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 306 transitions. [2021-10-28 23:16:26,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.826923076923077) internal successors, (251), 51 states have internal predecessors, (251), 0 states have call successors, (0), 0 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 23:16:26,967 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 306 transitions. [2021-10-28 23:16:26,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-10-28 23:16:26,968 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:26,969 INFO L513 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:16:27,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-10-28 23:16:27,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-10-28 23:16:27,178 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:27,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:27,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1082904153, now seen corresponding path program 49 times [2021-10-28 23:16:27,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:27,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023503841] [2021-10-28 23:16:27,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:27,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:27,211 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:27,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533967982] [2021-10-28 23:16:27,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:16:27,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:27,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:27,214 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:27,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-28 23:16:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:16:29,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 101 conjunts are in the unsatisfiable core [2021-10-28 23:16:29,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:16:30,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5978 backedges. 0 proven. 5978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:16:30,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:30,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023503841] [2021-10-28 23:16:30,899 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:16:30,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533967982] [2021-10-28 23:16:30,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533967982] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:16:30,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:16:30,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2021-10-28 23:16:30,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072465275] [2021-10-28 23:16:30,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-10-28 23:16:30,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:30,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-10-28 23:16:30,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-10-28 23:16:30,902 INFO L87 Difference]: Start difference. First operand 257 states and 306 transitions. Second operand has 53 states, 53 states have (on average 4.830188679245283) internal successors, (256), 52 states have internal predecessors, (256), 0 states have call successors, (0), 0 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 23:16:32,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:32,041 INFO L93 Difference]: Finished difference Result 266 states and 316 transitions. [2021-10-28 23:16:32,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-10-28 23:16:32,041 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 4.830188679245283) internal successors, (256), 52 states have internal predecessors, (256), 0 states have call successors, (0), 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 256 [2021-10-28 23:16:32,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:32,043 INFO L225 Difference]: With dead ends: 266 [2021-10-28 23:16:32,043 INFO L226 Difference]: Without dead ends: 262 [2021-10-28 23:16:32,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3876, Invalid=6426, Unknown=0, NotChecked=0, Total=10302 [2021-10-28 23:16:32,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-10-28 23:16:32,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2021-10-28 23:16:32,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.1954022988505748) internal successors, (312), 261 states have internal predecessors, (312), 0 states have call successors, (0), 0 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 23:16:32,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 312 transitions. [2021-10-28 23:16:32,051 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 312 transitions. Word has length 256 [2021-10-28 23:16:32,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:32,051 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 312 transitions. [2021-10-28 23:16:32,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 4.830188679245283) internal successors, (256), 52 states have internal predecessors, (256), 0 states have call successors, (0), 0 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 23:16:32,051 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 312 transitions. [2021-10-28 23:16:32,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-10-28 23:16:32,052 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:32,052 INFO L513 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:16:32,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-10-28 23:16:32,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-10-28 23:16:32,253 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:32,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:32,253 INFO L85 PathProgramCache]: Analyzing trace with hash -64907413, now seen corresponding path program 50 times [2021-10-28 23:16:32,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:32,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31229559] [2021-10-28 23:16:32,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:32,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:32,277 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:32,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251383051] [2021-10-28 23:16:32,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:16:32,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:32,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:32,279 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:32,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-10-28 23:16:34,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:16:34,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-28 23:16:34,440 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:16:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:16:34,895 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:16:34,896 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 23:16:34,897 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:16:34,899 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:16:34,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-10-28 23:16:35,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:35,121 INFO L731 BasicCegarLoop]: Path program histogram: [50, 1, 1, 1, 1] [2021-10-28 23:16:35,125 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:16:35,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:16:35 BoogieIcfgContainer [2021-10-28 23:16:35,361 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:16:35,362 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:16:35,362 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:16:35,363 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:16:35,363 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:14:35" (3/4) ... [2021-10-28 23:16:35,366 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 23:16:35,567 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:16:35,567 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:16:35,569 INFO L168 Benchmark]: Toolchain (without parser) took 121217.56 ms. Allocated memory was 125.8 MB in the beginning and 861.9 MB in the end (delta: 736.1 MB). Free memory was 95.3 MB in the beginning and 283.4 MB in the end (delta: -188.2 MB). Peak memory consumption was 547.6 MB. Max. memory is 16.1 GB. [2021-10-28 23:16:35,570 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 125.8 MB. Free memory was 79.1 MB in the beginning and 78.9 MB in the end (delta: 151.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:16:35,571 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.51 ms. Allocated memory is still 125.8 MB. Free memory was 95.1 MB in the beginning and 101.0 MB in the end (delta: -5.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-28 23:16:35,571 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.65 ms. Allocated memory is still 125.8 MB. Free memory was 101.0 MB in the beginning and 99.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:16:35,572 INFO L168 Benchmark]: Boogie Preprocessor took 23.67 ms. Allocated memory is still 125.8 MB. Free memory was 99.4 MB in the beginning and 98.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:16:35,572 INFO L168 Benchmark]: RCFGBuilder took 333.20 ms. Allocated memory is still 125.8 MB. Free memory was 98.3 MB in the beginning and 88.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:16:35,573 INFO L168 Benchmark]: TraceAbstraction took 120290.84 ms. Allocated memory was 125.8 MB in the beginning and 861.9 MB in the end (delta: 736.1 MB). Free memory was 87.8 MB in the beginning and 303.4 MB in the end (delta: -215.5 MB). Peak memory consumption was 674.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:16:35,573 INFO L168 Benchmark]: Witness Printer took 205.03 ms. Allocated memory is still 861.9 MB. Free memory was 302.3 MB in the beginning and 283.4 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-28 23:16:35,576 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 125.8 MB. Free memory was 79.1 MB in the beginning and 78.9 MB in the end (delta: 151.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 322.51 ms. Allocated memory is still 125.8 MB. Free memory was 95.1 MB in the beginning and 101.0 MB in the end (delta: -5.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.65 ms. Allocated memory is still 125.8 MB. Free memory was 101.0 MB in the beginning and 99.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.67 ms. Allocated memory is still 125.8 MB. Free memory was 99.4 MB in the beginning and 98.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 333.20 ms. Allocated memory is still 125.8 MB. Free memory was 98.3 MB in the beginning and 88.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 120290.84 ms. Allocated memory was 125.8 MB in the beginning and 861.9 MB in the end (delta: 736.1 MB). Free memory was 87.8 MB in the beginning and 303.4 MB in the end (delta: -215.5 MB). Peak memory consumption was 674.1 MB. Max. memory is 16.1 GB. * Witness Printer took 205.03 ms. Allocated memory is still 861.9 MB. Free memory was 302.3 MB in the beginning and 283.4 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 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: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L13] COND FALSE !(!cond) VAL [counter=0] [L13] COND FALSE !(!cond) VAL [counter=0] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [counter=0] [L36] EXPR counter++ VAL [counter=1] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=1] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=1] [L36] EXPR counter++ VAL [counter=2] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=2] [L36] EXPR counter++ VAL [counter=3] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=3] [L36] EXPR counter++ VAL [counter=4] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=4] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=4] [L36] EXPR counter++ VAL [counter=5] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=5] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=5] [L36] EXPR counter++ VAL [counter=6] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=6] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=6] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=6] [L36] EXPR counter++ VAL [counter=7] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=7] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=7] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=7] [L36] EXPR counter++ VAL [counter=8] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=8] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=8] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=8] [L36] EXPR counter++ VAL [counter=9] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=9] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=9] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=9] [L36] EXPR counter++ VAL [counter=10] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=10] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=10] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=10] [L36] EXPR counter++ VAL [counter=11] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=11] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=11] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=11] [L36] EXPR counter++ VAL [counter=12] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=12] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=12] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=12] [L36] EXPR counter++ VAL [counter=13] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=13] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=13] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=13] [L36] EXPR counter++ VAL [counter=14] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=14] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=14] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=14] [L36] EXPR counter++ VAL [counter=15] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=15] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=15] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=15] [L36] EXPR counter++ VAL [counter=16] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=16] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=16] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=16] [L36] EXPR counter++ VAL [counter=17] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=17] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=17] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=17] [L36] EXPR counter++ VAL [counter=18] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=18] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=18] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=18] [L36] EXPR counter++ VAL [counter=19] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=19] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=19] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=19] [L36] EXPR counter++ VAL [counter=20] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=20] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=20] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=20] [L36] EXPR counter++ VAL [counter=21] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=21] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=21] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=21] [L36] EXPR counter++ VAL [counter=22] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=22] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=22] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=22] [L36] EXPR counter++ VAL [counter=23] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=23] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=23] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=23] [L36] EXPR counter++ VAL [counter=24] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=24] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=24] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=24] [L36] EXPR counter++ VAL [counter=25] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=25] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=25] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=25] [L36] EXPR counter++ VAL [counter=26] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=26] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=26] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=26] [L36] EXPR counter++ VAL [counter=27] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=27] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=27] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=27] [L36] EXPR counter++ VAL [counter=28] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=28] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=28] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=28] [L36] EXPR counter++ VAL [counter=29] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=29] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=29] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=29] [L36] EXPR counter++ VAL [counter=30] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=30] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=30] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=30] [L36] EXPR counter++ VAL [counter=31] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=31] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=31] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=31] [L36] EXPR counter++ VAL [counter=32] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=32] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=32] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=32] [L36] EXPR counter++ VAL [counter=33] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=33] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=33] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=33] [L36] EXPR counter++ VAL [counter=34] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=34] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=34] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=34] [L36] EXPR counter++ VAL [counter=35] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=35] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=35] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=35] [L36] EXPR counter++ VAL [counter=36] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=36] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=36] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=36] [L36] EXPR counter++ VAL [counter=37] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=37] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=37] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=37] [L36] EXPR counter++ VAL [counter=38] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=38] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=38] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=38] [L36] EXPR counter++ VAL [counter=39] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=39] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=39] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=39] [L36] EXPR counter++ VAL [counter=40] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=40] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=40] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=40] [L36] EXPR counter++ VAL [counter=41] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=41] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=41] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=41] [L36] EXPR counter++ VAL [counter=42] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=42] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=42] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=42] [L36] EXPR counter++ VAL [counter=43] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=43] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=43] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=43] [L36] EXPR counter++ VAL [counter=44] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=44] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=44] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=44] [L36] EXPR counter++ VAL [counter=45] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=45] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=45] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=45] [L36] EXPR counter++ VAL [counter=46] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=46] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=46] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=46] [L36] EXPR counter++ VAL [counter=47] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=47] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=47] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=47] [L36] EXPR counter++ VAL [counter=48] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=48] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=48] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=48] [L36] EXPR counter++ VAL [counter=49] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=49] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=49] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=49] [L36] EXPR counter++ VAL [counter=50] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=50] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=50] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=50] [L36] EXPR counter++ VAL [counter=51] [L36] COND FALSE !(counter++<50) [L16] COND TRUE !(cond) VAL [counter=51] [L18] reach_error() VAL [counter=51] - UnprovableResult [Line: 18]: 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, 21 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 119.9s, OverallIterations: 54, TraceHistogramMax: 51, PathProgramHistogramMax: 50, EmptinessCheckTime: 0.0s, AutomataDifference: 24.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 750 SDtfs, 4501 SDslu, 6525 SDs, 0 SdLazy, 2909 SolverSat, 188 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7880 GetRequests, 5316 SyntacticMatches, 0 SemanticMatches, 2564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20828 ImplicationChecksByTransitivity, 35.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=262occurred in iteration=53, InterpolantAutomatonStates: 2664, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 53 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 6.1s SatisfiabilityAnalysisTime, 36.9s InterpolantComputationTime, 6969 NumberOfCodeBlocks, 6969 NumberOfCodeBlocksAsserted, 687 NumberOfCheckSat, 6655 ConstructedInterpolants, 0 QuantifiedInterpolants, 19691 SizeOfPredicates, 1241 NumberOfNonLiveVariables, 26870 ConjunctsInSsa, 2624 ConjunctsInUnsatCore, 53 InterpolantComputations, 4 PerfectInterpolantSequences, 0/100450 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 23:16:35,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8ccbb33-aa5e-4717-a3a4-31b67c44617e/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...