./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/array_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU --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 e8c27e61ac5d5a22c0e00a5dbac1b872460567877a501387ed9d5bda89096498 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:30:44,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:30:44,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:30:44,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:30:44,244 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:30:44,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:30:44,250 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:30:44,254 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:30:44,256 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:30:44,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:30:44,263 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:30:44,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:30:44,266 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:30:44,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:30:44,271 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:30:44,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:30:44,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:30:44,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:30:44,280 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:30:44,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:30:44,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:30:44,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:30:44,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:30:44,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:30:44,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:30:44,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:30:44,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:30:44,308 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:30:44,309 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:30:44,311 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:30:44,311 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:30:44,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:30:44,315 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:30:44,316 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:30:44,318 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:30:44,318 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:30:44,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:30:44,320 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:30:44,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:30:44,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:30:44,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:30:44,323 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:30:44,366 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:30:44,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:30:44,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:30:44,367 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:30:44,375 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:30:44,376 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:30:44,376 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:30:44,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:30:44,377 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:30:44,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:30:44,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:30:44,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:30:44,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:30:44,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:30:44,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:30:44,379 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:30:44,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:30:44,380 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:30:44,380 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:30:44,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:30:44,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:30:44,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:30:44,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:30:44,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:30:44,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:30:44,383 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:30:44,383 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:30:44,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:30:44,383 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:30:44,385 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:30:44,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:30:44,386 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:30:44,386 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_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8c27e61ac5d5a22c0e00a5dbac1b872460567877a501387ed9d5bda89096498 [2021-11-02 22:30:44,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:30:44,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:30:44,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:30:44,670 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:30:44,670 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:30:44,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/loop-acceleration/array_4.i [2021-11-02 22:30:44,746 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/data/331811cb5/f3ce233462a74286a624c0c91901933b/FLAGd07ba7236 [2021-11-02 22:30:45,262 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:30:45,263 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/sv-benchmarks/c/loop-acceleration/array_4.i [2021-11-02 22:30:45,269 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/data/331811cb5/f3ce233462a74286a624c0c91901933b/FLAGd07ba7236 [2021-11-02 22:30:45,652 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/data/331811cb5/f3ce233462a74286a624c0c91901933b [2021-11-02 22:30:45,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:30:45,658 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:30:45,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:30:45,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:30:45,671 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:30:45,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:30:45" (1/1) ... [2021-11-02 22:30:45,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d7e20f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:30:45, skipping insertion in model container [2021-11-02 22:30:45,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:30:45" (1/1) ... [2021-11-02 22:30:45,679 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:30:45,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:30:45,858 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_459e3a1b-2478-4836-a081-703129c615f1/sv-benchmarks/c/loop-acceleration/array_4.i[848,861] [2021-11-02 22:30:45,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:30:45,877 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:30:45,889 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_459e3a1b-2478-4836-a081-703129c615f1/sv-benchmarks/c/loop-acceleration/array_4.i[848,861] [2021-11-02 22:30:45,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:30:45,904 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:30:45,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:30:45 WrapperNode [2021-11-02 22:30:45,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:30:45,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:30:45,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:30:45,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:30:45,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:30:45" (1/1) ... [2021-11-02 22:30:45,918 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:30:45" (1/1) ... [2021-11-02 22:30:45,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:30:45,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:30:45,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:30:45,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:30:45,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:30:45" (1/1) ... [2021-11-02 22:30:45,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:30:45" (1/1) ... [2021-11-02 22:30:45,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:30:45" (1/1) ... [2021-11-02 22:30:45,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:30:45" (1/1) ... [2021-11-02 22:30:45,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:30:45" (1/1) ... [2021-11-02 22:30:45,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:30:45" (1/1) ... [2021-11-02 22:30:45,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:30:45" (1/1) ... [2021-11-02 22:30:45,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:30:45,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:30:45,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:30:45,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:30:45,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:30:45" (1/1) ... [2021-11-02 22:30:45,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:30:45,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:30:46,000 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:30:46,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:30:46,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:30:46,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:30:46,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:30:46,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:30:46,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:30:46,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:30:46,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:30:46,227 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:30:46,228 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-02 22:30:46,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:30:46 BoogieIcfgContainer [2021-11-02 22:30:46,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:30:46,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:30:46,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:30:46,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:30:46,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:30:45" (1/3) ... [2021-11-02 22:30:46,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cb5b9ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:30:46, skipping insertion in model container [2021-11-02 22:30:46,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:30:45" (2/3) ... [2021-11-02 22:30:46,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cb5b9ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:30:46, skipping insertion in model container [2021-11-02 22:30:46,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:30:46" (3/3) ... [2021-11-02 22:30:46,240 INFO L111 eAbstractionObserver]: Analyzing ICFG array_4.i [2021-11-02 22:30:46,245 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:30:46,246 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:30:46,294 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:30:46,300 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:30:46,300 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:30:46,313 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:46,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-02 22:30:46,316 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:46,317 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:46,318 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:46,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:46,322 INFO L85 PathProgramCache]: Analyzing trace with hash 212257263, now seen corresponding path program 1 times [2021-11-02 22:30:46,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:46,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126434070] [2021-11-02 22:30:46,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:46,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:46,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:46,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:46,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126434070] [2021-11-02 22:30:46,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126434070] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:30:46,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:30:46,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:30:46,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427377425] [2021-11-02 22:30:46,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:30:46,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:46,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:30:46,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:30:46,537 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:46,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:46,593 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2021-11-02 22:30:46,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:30:46,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-02 22:30:46,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:46,618 INFO L225 Difference]: With dead ends: 41 [2021-11-02 22:30:46,618 INFO L226 Difference]: Without dead ends: 21 [2021-11-02 22:30:46,621 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:30:46,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-02 22:30:46,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 13. [2021-11-02 22:30:46,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:46,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-02 22:30:46,668 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2021-11-02 22:30:46,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:46,668 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-02 22:30:46,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:46,669 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-02 22:30:46,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:30:46,670 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:46,670 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:46,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:30:46,671 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:46,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:46,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1562582865, now seen corresponding path program 1 times [2021-11-02 22:30:46,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:46,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567072448] [2021-11-02 22:30:46,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:46,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:46,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:46,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567072448] [2021-11-02 22:30:46,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567072448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:46,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408652245] [2021-11-02 22:30:46,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:46,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:46,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:30:46,733 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:30:46,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:30:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:46,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:30:46,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:46,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408652245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:46,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:30:46,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-02 22:30:46,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187916196] [2021-11-02 22:30:46,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:30:46,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:46,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:30:46,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:30:46,924 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:46,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:46,960 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-11-02 22:30:46,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:30:46,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-02 22:30:46,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:46,962 INFO L225 Difference]: With dead ends: 38 [2021-11-02 22:30:46,962 INFO L226 Difference]: Without dead ends: 30 [2021-11-02 22:30:46,963 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:30:46,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-02 22:30:46,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 15. [2021-11-02 22:30:46,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 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) [2021-11-02 22:30:46,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-02 22:30:46,968 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2021-11-02 22:30:46,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:46,968 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-02 22:30:46,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:46,969 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-02 22:30:46,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-02 22:30:46,969 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:46,970 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:47,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:47,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:47,171 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:47,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:47,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1568672497, now seen corresponding path program 2 times [2021-11-02 22:30:47,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:47,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600568784] [2021-11-02 22:30:47,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:47,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:30:47,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:47,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600568784] [2021-11-02 22:30:47,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600568784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:30:47,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:30:47,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:30:47,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139520969] [2021-11-02 22:30:47,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:30:47,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:47,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:30:47,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:30:47,320 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:47,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:47,367 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-11-02 22:30:47,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:30:47,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 13 [2021-11-02 22:30:47,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:47,370 INFO L225 Difference]: With dead ends: 22 [2021-11-02 22:30:47,370 INFO L226 Difference]: Without dead ends: 18 [2021-11-02 22:30:47,371 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:30:47,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-02 22:30:47,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-11-02 22:30:47,377 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) [2021-11-02 22:30:47,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-02 22:30:47,378 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2021-11-02 22:30:47,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:47,379 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-02 22:30:47,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:47,380 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-02 22:30:47,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 22:30:47,380 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:47,381 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:47,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:30:47,381 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:47,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:47,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1430972585, now seen corresponding path program 1 times [2021-11-02 22:30:47,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:47,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613834304] [2021-11-02 22:30:47,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:47,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:47,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:30:47,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:47,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613834304] [2021-11-02 22:30:47,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613834304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:47,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117027963] [2021-11-02 22:30:47,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:47,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:47,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:30:47,444 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:30:47,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:30:47,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:47,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:30:47,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:30:47,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117027963] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:47,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:30:47,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-02 22:30:47,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68927099] [2021-11-02 22:30:47,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:30:47,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:47,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:30:47,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:30:47,563 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:47,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:47,620 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-11-02 22:30:47,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:30:47,621 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-02 22:30:47,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:47,621 INFO L225 Difference]: With dead ends: 41 [2021-11-02 22:30:47,622 INFO L226 Difference]: Without dead ends: 27 [2021-11-02 22:30:47,622 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:30:47,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-02 22:30:47,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-11-02 22:30:47,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:47,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-11-02 22:30:47,627 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 16 [2021-11-02 22:30:47,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:47,627 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-11-02 22:30:47,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:47,628 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-11-02 22:30:47,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 22:30:47,629 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:47,629 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:47,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:47,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:47,851 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:47,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:47,851 INFO L85 PathProgramCache]: Analyzing trace with hash 413041625, now seen corresponding path program 2 times [2021-11-02 22:30:47,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:47,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727892658] [2021-11-02 22:30:47,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:47,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-02 22:30:47,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:47,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727892658] [2021-11-02 22:30:47,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727892658] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:47,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998424254] [2021-11-02 22:30:47,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:30:47,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:47,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:30:47,941 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:30:47,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:30:48,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:30:48,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:30:48,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:30:48,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-02 22:30:48,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998424254] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:48,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:30:48,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-02 22:30:48,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101816649] [2021-11-02 22:30:48,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:30:48,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:48,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:30:48,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:30:48,082 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:48,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:48,123 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-11-02 22:30:48,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:30:48,123 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-02 22:30:48,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:48,124 INFO L225 Difference]: With dead ends: 52 [2021-11-02 22:30:48,124 INFO L226 Difference]: Without dead ends: 36 [2021-11-02 22:30:48,125 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:30:48,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-02 22:30:48,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2021-11-02 22:30:48,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 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) [2021-11-02 22:30:48,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-11-02 22:30:48,130 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2021-11-02 22:30:48,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:48,130 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-11-02 22:30:48,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:48,131 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-11-02 22:30:48,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:30:48,131 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:48,131 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:48,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:48,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:48,341 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:48,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:48,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1809878309, now seen corresponding path program 3 times [2021-11-02 22:30:48,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:48,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54533307] [2021-11-02 22:30:48,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:48,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-02 22:30:48,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:48,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54533307] [2021-11-02 22:30:48,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54533307] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:48,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053099848] [2021-11-02 22:30:48,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:30:48,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:48,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:30:48,425 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:30:48,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:30:48,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 22:30:48,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:30:48,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:30:48,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 22:30:48,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053099848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:48,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:30:48,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-02 22:30:48,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449851210] [2021-11-02 22:30:48,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:30:48,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:48,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:30:48,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:30:48,593 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:48,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:48,653 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-11-02 22:30:48,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:30:48,653 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-02 22:30:48,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:48,654 INFO L225 Difference]: With dead ends: 57 [2021-11-02 22:30:48,654 INFO L226 Difference]: Without dead ends: 37 [2021-11-02 22:30:48,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:30:48,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-02 22:30:48,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-11-02 22:30:48,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 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) [2021-11-02 22:30:48,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-11-02 22:30:48,660 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 26 [2021-11-02 22:30:48,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:48,660 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-11-02 22:30:48,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:48,661 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-11-02 22:30:48,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 22:30:48,661 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:48,662 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:48,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-02 22:30:48,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:48,879 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:48,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:48,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1650799069, now seen corresponding path program 4 times [2021-11-02 22:30:48,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:48,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939245860] [2021-11-02 22:30:48,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:48,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-02 22:30:49,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:49,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939245860] [2021-11-02 22:30:49,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939245860] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:49,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845686331] [2021-11-02 22:30:49,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:30:49,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:49,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:30:49,027 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:30:49,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:30:49,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:30:49,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:30:49,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:30:49,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-02 22:30:49,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845686331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:49,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:30:49,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-02 22:30:49,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568263225] [2021-11-02 22:30:49,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:30:49,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:49,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:30:49,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:30:49,203 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:49,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:49,253 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-11-02 22:30:49,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:30:49,254 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-02 22:30:49,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:49,254 INFO L225 Difference]: With dead ends: 68 [2021-11-02 22:30:49,255 INFO L226 Difference]: Without dead ends: 46 [2021-11-02 22:30:49,255 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:30:49,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-02 22:30:49,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2021-11-02 22:30:49,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:49,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-11-02 22:30:49,260 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2021-11-02 22:30:49,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:49,261 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-11-02 22:30:49,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:49,261 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-11-02 22:30:49,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 22:30:49,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:49,263 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:49,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:49,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-02 22:30:49,491 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:49,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:49,491 INFO L85 PathProgramCache]: Analyzing trace with hash 714131039, now seen corresponding path program 5 times [2021-11-02 22:30:49,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:49,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77978195] [2021-11-02 22:30:49,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:49,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-02 22:30:49,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:49,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77978195] [2021-11-02 22:30:49,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77978195] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:49,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904423896] [2021-11-02 22:30:49,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:30:49,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:49,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:30:49,572 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:30:49,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:30:49,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-02 22:30:49,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:30:49,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:30:49,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-02 22:30:49,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904423896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:49,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:30:49,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-02 22:30:49,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167797067] [2021-11-02 22:30:49,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:30:49,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:49,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:30:49,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:30:49,777 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:49,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:49,844 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2021-11-02 22:30:49,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:30:49,844 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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 36 [2021-11-02 22:30:49,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:49,847 INFO L225 Difference]: With dead ends: 77 [2021-11-02 22:30:49,847 INFO L226 Difference]: Without dead ends: 55 [2021-11-02 22:30:49,848 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:30:49,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-02 22:30:49,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2021-11-02 22:30:49,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-11-02 22:30:49,866 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2021-11-02 22:30:49,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:49,866 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-11-02 22:30:49,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:49,870 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-11-02 22:30:49,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 22:30:49,871 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:49,871 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:49,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:50,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:50,087 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:50,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:50,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1775680927, now seen corresponding path program 6 times [2021-11-02 22:30:50,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:50,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030946983] [2021-11-02 22:30:50,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:50,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-02 22:30:50,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:50,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030946983] [2021-11-02 22:30:50,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030946983] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:50,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242092222] [2021-11-02 22:30:50,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:30:50,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:50,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:30:50,188 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:30:50,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:30:50,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-02 22:30:50,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:30:50,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:30:50,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-02 22:30:50,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242092222] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:50,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:30:50,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-02 22:30:50,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28459318] [2021-11-02 22:30:50,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:30:50,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:50,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:30:50,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:30:50,412 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2021-11-02 22:30:50,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:50,471 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2021-11-02 22:30:50,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:30:50,472 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-02 22:30:50,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:50,474 INFO L225 Difference]: With dead ends: 86 [2021-11-02 22:30:50,474 INFO L226 Difference]: Without dead ends: 64 [2021-11-02 22:30:50,475 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:30:50,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-02 22:30:50,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 41. [2021-11-02 22:30:50,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 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) [2021-11-02 22:30:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-11-02 22:30:50,486 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2021-11-02 22:30:50,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:50,486 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-11-02 22:30:50,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2021-11-02 22:30:50,487 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-11-02 22:30:50,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 22:30:50,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:50,490 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:50,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:50,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:50,704 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:50,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:50,705 INFO L85 PathProgramCache]: Analyzing trace with hash 2106770915, now seen corresponding path program 7 times [2021-11-02 22:30:50,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:50,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808948836] [2021-11-02 22:30:50,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:50,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:50,821 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-02 22:30:50,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:50,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808948836] [2021-11-02 22:30:50,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808948836] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:50,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288006154] [2021-11-02 22:30:50,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:30:50,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:50,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:30:50,826 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:30:50,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:30:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:50,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:30:50,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-02 22:30:51,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288006154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:51,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:30:51,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-02 22:30:51,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558668418] [2021-11-02 22:30:51,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:30:51,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:51,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:30:51,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:30:51,049 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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) [2021-11-02 22:30:51,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:51,133 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2021-11-02 22:30:51,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:30:51,134 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-02 22:30:51,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:51,135 INFO L225 Difference]: With dead ends: 95 [2021-11-02 22:30:51,135 INFO L226 Difference]: Without dead ends: 73 [2021-11-02 22:30:51,136 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:30:51,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-02 22:30:51,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 43. [2021-11-02 22:30:51,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:51,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-11-02 22:30:51,151 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2021-11-02 22:30:51,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:51,152 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-11-02 22:30:51,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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) [2021-11-02 22:30:51,152 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-11-02 22:30:51,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-02 22:30:51,155 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:51,155 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:51,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:51,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 22:30:51,356 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:51,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:51,357 INFO L85 PathProgramCache]: Analyzing trace with hash 816410853, now seen corresponding path program 8 times [2021-11-02 22:30:51,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:51,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080260729] [2021-11-02 22:30:51,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:51,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:51,494 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-02 22:30:51,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:51,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080260729] [2021-11-02 22:30:51,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080260729] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:51,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140779237] [2021-11-02 22:30:51,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:30:51,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:51,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:30:51,496 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:30:51,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:30:51,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:30:51,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:30:51,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 22:30:51,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-02 22:30:51,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140779237] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:51,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:30:51,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-02 22:30:51,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220952663] [2021-11-02 22:30:51,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:30:51,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:51,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:30:51,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:30:51,752 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:51,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:51,825 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2021-11-02 22:30:51,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:30:51,826 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-02 22:30:51,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:51,826 INFO L225 Difference]: With dead ends: 104 [2021-11-02 22:30:51,827 INFO L226 Difference]: Without dead ends: 82 [2021-11-02 22:30:51,827 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:30:51,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-02 22:30:51,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 45. [2021-11-02 22:30:51,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:51,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-11-02 22:30:51,831 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2021-11-02 22:30:51,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:51,831 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-11-02 22:30:51,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:51,831 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-11-02 22:30:51,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 22:30:51,832 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:51,832 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:51,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:52,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-02 22:30:52,058 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:52,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:52,059 INFO L85 PathProgramCache]: Analyzing trace with hash 2025939815, now seen corresponding path program 9 times [2021-11-02 22:30:52,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:52,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682740216] [2021-11-02 22:30:52,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:52,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-02 22:30:52,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:52,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682740216] [2021-11-02 22:30:52,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682740216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:52,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493809496] [2021-11-02 22:30:52,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:30:52,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:52,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:30:52,203 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:30:52,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:30:52,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-02 22:30:52,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:30:52,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:30:52,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-02 22:30:52,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493809496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:52,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:30:52,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 15 [2021-11-02 22:30:52,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673331448] [2021-11-02 22:30:52,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:30:52,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:52,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:30:52,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:30:52,492 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:52,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:52,645 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2021-11-02 22:30:52,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 22:30:52,646 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-02 22:30:52,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:52,647 INFO L225 Difference]: With dead ends: 101 [2021-11-02 22:30:52,647 INFO L226 Difference]: Without dead ends: 67 [2021-11-02 22:30:52,648 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:30:52,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-02 22:30:52,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2021-11-02 22:30:52,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 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) [2021-11-02 22:30:52,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-11-02 22:30:52,651 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 44 [2021-11-02 22:30:52,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:52,651 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-11-02 22:30:52,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:52,652 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-11-02 22:30:52,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 22:30:52,652 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:52,653 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:52,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:52,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-02 22:30:52,866 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:52,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:52,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1562561513, now seen corresponding path program 10 times [2021-11-02 22:30:52,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:52,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082360944] [2021-11-02 22:30:52,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:52,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:53,010 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-02 22:30:53,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:53,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082360944] [2021-11-02 22:30:53,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082360944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:53,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800590692] [2021-11-02 22:30:53,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:30:53,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:53,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:30:53,012 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:30:53,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:30:53,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:30:53,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:30:53,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 22:30:53,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-02 22:30:53,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800590692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:53,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:30:53,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-02 22:30:53,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377783270] [2021-11-02 22:30:53,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:30:53,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:53,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:30:53,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:30:53,322 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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) [2021-11-02 22:30:53,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:53,393 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2021-11-02 22:30:53,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:30:53,394 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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 64 [2021-11-02 22:30:53,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:53,394 INFO L225 Difference]: With dead ends: 116 [2021-11-02 22:30:53,395 INFO L226 Difference]: Without dead ends: 76 [2021-11-02 22:30:53,395 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:30:53,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-02 22:30:53,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2021-11-02 22:30:53,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:53,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2021-11-02 22:30:53,399 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2021-11-02 22:30:53,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:53,399 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2021-11-02 22:30:53,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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) [2021-11-02 22:30:53,400 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2021-11-02 22:30:53,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 22:30:53,401 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:53,401 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:53,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:53,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:53,619 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:53,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:53,620 INFO L85 PathProgramCache]: Analyzing trace with hash -100069141, now seen corresponding path program 11 times [2021-11-02 22:30:53,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:53,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910115828] [2021-11-02 22:30:53,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:53,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:53,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-02 22:30:53,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:53,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910115828] [2021-11-02 22:30:53,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910115828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:53,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608121800] [2021-11-02 22:30:53,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:30:53,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:53,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:30:53,757 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:30:53,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 22:30:53,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-11-02 22:30:53,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:30:53,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 22:30:53,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:54,162 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-02 22:30:54,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608121800] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:54,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:30:54,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-02 22:30:54,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832601428] [2021-11-02 22:30:54,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:30:54,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:54,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:30:54,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:30:54,164 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:54,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:54,251 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2021-11-02 22:30:54,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:30:54,251 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-02 22:30:54,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:54,252 INFO L225 Difference]: With dead ends: 125 [2021-11-02 22:30:54,252 INFO L226 Difference]: Without dead ends: 85 [2021-11-02 22:30:54,252 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:30:54,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-02 22:30:54,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 69. [2021-11-02 22:30:54,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:54,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-11-02 22:30:54,255 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2021-11-02 22:30:54,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:54,256 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-11-02 22:30:54,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:54,256 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-11-02 22:30:54,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-02 22:30:54,256 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:54,257 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:54,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:54,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-02 22:30:54,457 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:54,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:54,458 INFO L85 PathProgramCache]: Analyzing trace with hash -160293523, now seen corresponding path program 12 times [2021-11-02 22:30:54,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:54,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006810654] [2021-11-02 22:30:54,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:54,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-02 22:30:54,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:54,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006810654] [2021-11-02 22:30:54,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006810654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:54,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698830038] [2021-11-02 22:30:54,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:30:54,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:54,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:30:54,612 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:30:54,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 22:30:55,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-11-02 22:30:55,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:30:55,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 22:30:55,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:55,445 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-02 22:30:55,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698830038] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:55,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:30:55,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 18 [2021-11-02 22:30:55,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253285206] [2021-11-02 22:30:55,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 22:30:55,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:55,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 22:30:55,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:30:55,449 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:55,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:55,590 INFO L93 Difference]: Finished difference Result 128 states and 133 transitions. [2021-11-02 22:30:55,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 22:30:55,590 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-02 22:30:55,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:55,593 INFO L225 Difference]: With dead ends: 128 [2021-11-02 22:30:55,594 INFO L226 Difference]: Without dead ends: 82 [2021-11-02 22:30:55,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:30:55,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-02 22:30:55,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-11-02 22:30:55,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 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) [2021-11-02 22:30:55,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2021-11-02 22:30:55,604 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 68 [2021-11-02 22:30:55,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:55,605 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2021-11-02 22:30:55,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:55,605 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2021-11-02 22:30:55,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 22:30:55,606 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:55,606 INFO L513 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:55,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:55,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 22:30:55,807 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:55,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:55,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1206488055, now seen corresponding path program 13 times [2021-11-02 22:30:55,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:55,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749945452] [2021-11-02 22:30:55,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:55,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:55,988 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-02 22:30:55,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:55,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749945452] [2021-11-02 22:30:55,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749945452] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:55,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643599730] [2021-11-02 22:30:55,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:30:55,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:55,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:30:55,991 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:30:56,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 22:30:56,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:56,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:30:56,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-02 22:30:56,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643599730] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:56,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:30:56,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-02 22:30:56,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350434050] [2021-11-02 22:30:56,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 22:30:56,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:56,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 22:30:56,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:30:56,416 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-11-02 22:30:56,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:56,520 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2021-11-02 22:30:56,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 22:30:56,521 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-02 22:30:56,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:56,522 INFO L225 Difference]: With dead ends: 140 [2021-11-02 22:30:56,522 INFO L226 Difference]: Without dead ends: 91 [2021-11-02 22:30:56,523 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:30:56,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-02 22:30:56,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2021-11-02 22:30:56,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:56,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2021-11-02 22:30:56,527 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 79 [2021-11-02 22:30:56,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:56,527 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2021-11-02 22:30:56,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-11-02 22:30:56,528 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2021-11-02 22:30:56,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-02 22:30:56,528 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:56,528 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:56,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:56,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 22:30:56,750 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:56,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:56,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1774951755, now seen corresponding path program 14 times [2021-11-02 22:30:56,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:56,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898011322] [2021-11-02 22:30:56,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:56,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:56,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-02 22:30:56,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:56,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898011322] [2021-11-02 22:30:56,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898011322] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:56,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224298806] [2021-11-02 22:30:56,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:30:56,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:56,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:30:56,924 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:30:56,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 22:30:57,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:30:57,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:30:57,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 22:30:57,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:57,369 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-02 22:30:57,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224298806] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:57,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:30:57,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-02 22:30:57,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577760336] [2021-11-02 22:30:57,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:30:57,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:57,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:30:57,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:30:57,371 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:57,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:57,483 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2021-11-02 22:30:57,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:30:57,483 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-02 22:30:57,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:57,484 INFO L225 Difference]: With dead ends: 149 [2021-11-02 22:30:57,484 INFO L226 Difference]: Without dead ends: 100 [2021-11-02 22:30:57,485 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:30:57,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-02 22:30:57,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2021-11-02 22:30:57,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-11-02 22:30:57,490 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 81 [2021-11-02 22:30:57,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:57,490 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-11-02 22:30:57,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:57,490 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-11-02 22:30:57,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-02 22:30:57,491 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:57,491 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:57,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-02 22:30:57,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 22:30:57,707 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:57,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:57,707 INFO L85 PathProgramCache]: Analyzing trace with hash 2099544563, now seen corresponding path program 15 times [2021-11-02 22:30:57,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:57,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813460334] [2021-11-02 22:30:57,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:57,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:57,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-02 22:30:57,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:57,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813460334] [2021-11-02 22:30:57,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813460334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:57,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74292584] [2021-11-02 22:30:57,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:30:57,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:57,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:30:57,895 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:30:57,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 22:30:58,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-02 22:30:58,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:30:58,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 22:30:58,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-02 22:30:58,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74292584] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:58,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:30:58,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 21 [2021-11-02 22:30:58,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465513320] [2021-11-02 22:30:58,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 22:30:58,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:58,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 22:30:58,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:30:58,630 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:58,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:58,765 INFO L93 Difference]: Finished difference Result 152 states and 157 transitions. [2021-11-02 22:30:58,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:30:58,766 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-02 22:30:58,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:58,767 INFO L225 Difference]: With dead ends: 152 [2021-11-02 22:30:58,767 INFO L226 Difference]: Without dead ends: 97 [2021-11-02 22:30:58,768 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:30:58,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-02 22:30:58,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-11-02 22:30:58,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 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) [2021-11-02 22:30:58,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2021-11-02 22:30:58,771 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 83 [2021-11-02 22:30:58,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:58,772 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2021-11-02 22:30:58,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:58,772 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2021-11-02 22:30:58,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-02 22:30:58,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:58,773 INFO L513 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:58,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:58,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 22:30:58,986 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:58,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:58,987 INFO L85 PathProgramCache]: Analyzing trace with hash -414712331, now seen corresponding path program 16 times [2021-11-02 22:30:58,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:58,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757156708] [2021-11-02 22:30:58,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:58,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:59,204 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-02 22:30:59,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:59,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757156708] [2021-11-02 22:30:59,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757156708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:59,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858035848] [2021-11-02 22:30:59,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:30:59,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:59,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:30:59,210 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:30:59,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 22:30:59,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:30:59,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:30:59,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:30:59,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:59,718 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-02 22:30:59,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858035848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:59,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:30:59,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-02 22:30:59,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522892293] [2021-11-02 22:30:59,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 22:30:59,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:59,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 22:30:59,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:30:59,725 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:59,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:59,848 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2021-11-02 22:30:59,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 22:30:59,849 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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) Word has length 94 [2021-11-02 22:30:59,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:59,850 INFO L225 Difference]: With dead ends: 164 [2021-11-02 22:30:59,850 INFO L226 Difference]: Without dead ends: 106 [2021-11-02 22:30:59,850 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:30:59,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-02 22:30:59,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2021-11-02 22:30:59,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:59,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2021-11-02 22:30:59,855 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2021-11-02 22:30:59,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:59,855 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2021-11-02 22:30:59,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:59,855 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2021-11-02 22:30:59,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-02 22:30:59,856 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:59,856 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:59,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:00,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:00,072 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:31:00,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:00,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1433998199, now seen corresponding path program 17 times [2021-11-02 22:31:00,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:00,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110099294] [2021-11-02 22:31:00,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:00,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-02 22:31:00,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:00,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110099294] [2021-11-02 22:31:00,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110099294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:00,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576319216] [2021-11-02 22:31:00,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:31:00,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:00,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:00,304 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:00,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 22:31:00,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-11-02 22:31:00,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:31:00,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:31:00,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-02 22:31:00,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576319216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:00,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:31:00,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 22:31:00,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230134084] [2021-11-02 22:31:00,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 22:31:00,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:00,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 22:31:00,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:31:00,966 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:01,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:01,070 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2021-11-02 22:31:01,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 22:31:01,071 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-02 22:31:01,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:01,072 INFO L225 Difference]: With dead ends: 173 [2021-11-02 22:31:01,072 INFO L226 Difference]: Without dead ends: 115 [2021-11-02 22:31:01,072 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:31:01,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-02 22:31:01,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 99. [2021-11-02 22:31:01,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:01,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2021-11-02 22:31:01,076 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2021-11-02 22:31:01,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:01,077 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2021-11-02 22:31:01,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:01,077 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2021-11-02 22:31:01,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-02 22:31:01,078 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:01,078 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:01,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:01,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:01,290 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:31:01,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:01,291 INFO L85 PathProgramCache]: Analyzing trace with hash -71643015, now seen corresponding path program 18 times [2021-11-02 22:31:01,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:01,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808510818] [2021-11-02 22:31:01,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:01,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-02 22:31:01,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:01,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808510818] [2021-11-02 22:31:01,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808510818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:01,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603884712] [2021-11-02 22:31:01,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:31:01,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:01,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:01,530 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:01,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 22:31:03,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-11-02 22:31:03,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:31:03,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 22:31:03,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-02 22:31:03,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603884712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:03,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:31:03,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-02 22:31:03,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147228823] [2021-11-02 22:31:03,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 22:31:03,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:03,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 22:31:03,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:31:03,618 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:03,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:03,746 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2021-11-02 22:31:03,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:31:03,746 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-02 22:31:03,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:03,747 INFO L225 Difference]: With dead ends: 182 [2021-11-02 22:31:03,747 INFO L226 Difference]: Without dead ends: 124 [2021-11-02 22:31:03,750 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:31:03,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-02 22:31:03,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 101. [2021-11-02 22:31:03,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 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) [2021-11-02 22:31:03,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-11-02 22:31:03,755 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2021-11-02 22:31:03,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:03,756 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-11-02 22:31:03,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:03,756 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-11-02 22:31:03,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-02 22:31:03,757 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:03,757 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:03,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:03,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:03,978 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:31:03,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:03,979 INFO L85 PathProgramCache]: Analyzing trace with hash 411129083, now seen corresponding path program 19 times [2021-11-02 22:31:03,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:03,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445796844] [2021-11-02 22:31:03,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:03,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:04,241 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-02 22:31:04,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:04,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445796844] [2021-11-02 22:31:04,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445796844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:04,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884954788] [2021-11-02 22:31:04,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:31:04,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:04,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:04,247 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:04,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 22:31:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:04,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 22:31:04,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-02 22:31:04,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884954788] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:04,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:31:04,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-02 22:31:04,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334104359] [2021-11-02 22:31:04,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 22:31:04,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:04,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 22:31:04,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:31:04,963 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-11-02 22:31:05,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:05,103 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2021-11-02 22:31:05,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:31:05,104 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-02 22:31:05,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:05,105 INFO L225 Difference]: With dead ends: 191 [2021-11-02 22:31:05,105 INFO L226 Difference]: Without dead ends: 133 [2021-11-02 22:31:05,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:31:05,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-02 22:31:05,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 103. [2021-11-02 22:31:05,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:05,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2021-11-02 22:31:05,110 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2021-11-02 22:31:05,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:05,110 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2021-11-02 22:31:05,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-11-02 22:31:05,110 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2021-11-02 22:31:05,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-02 22:31:05,111 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:05,112 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:05,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:05,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:05,330 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:31:05,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:05,331 INFO L85 PathProgramCache]: Analyzing trace with hash 498647293, now seen corresponding path program 20 times [2021-11-02 22:31:05,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:05,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062984358] [2021-11-02 22:31:05,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:05,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-02 22:31:05,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:05,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062984358] [2021-11-02 22:31:05,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062984358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:05,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663659454] [2021-11-02 22:31:05,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:31:05,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:05,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:05,606 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:05,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 22:31:05,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:31:05,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:31:05,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 22:31:05,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-02 22:31:06,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663659454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:06,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:31:06,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-02 22:31:06,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436223105] [2021-11-02 22:31:06,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:31:06,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:06,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:31:06,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:31:06,221 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:06,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:06,353 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2021-11-02 22:31:06,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 22:31:06,354 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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 102 [2021-11-02 22:31:06,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:06,355 INFO L225 Difference]: With dead ends: 200 [2021-11-02 22:31:06,355 INFO L226 Difference]: Without dead ends: 142 [2021-11-02 22:31:06,355 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:31:06,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-02 22:31:06,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 105. [2021-11-02 22:31:06,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 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) [2021-11-02 22:31:06,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2021-11-02 22:31:06,360 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2021-11-02 22:31:06,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:06,360 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2021-11-02 22:31:06,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:06,361 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2021-11-02 22:31:06,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-02 22:31:06,362 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:06,362 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:06,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-02 22:31:06,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:06,566 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:31:06,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:06,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1295698817, now seen corresponding path program 21 times [2021-11-02 22:31:06,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:06,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358144112] [2021-11-02 22:31:06,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:06,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:06,879 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-02 22:31:06,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:06,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358144112] [2021-11-02 22:31:06,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358144112] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:06,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739730209] [2021-11-02 22:31:06,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:31:06,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:06,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:06,881 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:06,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 22:31:07,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-02 22:31:07,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:31:07,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 22:31:07,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:08,142 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-02 22:31:08,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739730209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:08,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:31:08,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21] total 27 [2021-11-02 22:31:08,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243547395] [2021-11-02 22:31:08,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 22:31:08,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:08,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 22:31:08,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-11-02 22:31:08,145 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 27 states, 27 states have (on average 4.2592592592592595) internal successors, (115), 27 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:08,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:08,389 INFO L93 Difference]: Finished difference Result 197 states and 205 transitions. [2021-11-02 22:31:08,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 22:31:08,389 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.2592592592592595) internal successors, (115), 27 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-02 22:31:08,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:08,390 INFO L225 Difference]: With dead ends: 197 [2021-11-02 22:31:08,391 INFO L226 Difference]: Without dead ends: 127 [2021-11-02 22:31:08,391 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=381, Invalid=675, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 22:31:08,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-02 22:31:08,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-11-02 22:31:08,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 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) [2021-11-02 22:31:08,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-11-02 22:31:08,400 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 104 [2021-11-02 22:31:08,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:08,400 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-11-02 22:31:08,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.2592592592592595) internal successors, (115), 27 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:08,400 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-11-02 22:31:08,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-02 22:31:08,402 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:08,402 INFO L513 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:08,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:08,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 22:31:08,602 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:31:08,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:08,603 INFO L85 PathProgramCache]: Analyzing trace with hash -52983807, now seen corresponding path program 22 times [2021-11-02 22:31:08,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:08,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806273938] [2021-11-02 22:31:08,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:08,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-11-02 22:31:08,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:08,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806273938] [2021-11-02 22:31:08,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806273938] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:08,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177562124] [2021-11-02 22:31:08,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:31:08,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:08,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:08,943 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:08,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 22:31:09,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:31:09,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:31:09,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 22:31:09,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-11-02 22:31:09,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177562124] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:09,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:31:09,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-02 22:31:09,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490429392] [2021-11-02 22:31:09,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 22:31:09,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:09,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 22:31:09,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-02 22:31:09,762 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 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) [2021-11-02 22:31:09,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:09,897 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2021-11-02 22:31:09,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 22:31:09,898 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 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) Word has length 124 [2021-11-02 22:31:09,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:09,899 INFO L225 Difference]: With dead ends: 212 [2021-11-02 22:31:09,899 INFO L226 Difference]: Without dead ends: 136 [2021-11-02 22:31:09,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-02 22:31:09,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-02 22:31:09,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 127. [2021-11-02 22:31:09,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:09,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2021-11-02 22:31:09,903 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2021-11-02 22:31:09,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:09,904 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2021-11-02 22:31:09,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 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) [2021-11-02 22:31:09,904 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2021-11-02 22:31:09,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-02 22:31:09,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:09,905 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:09,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:10,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 22:31:10,124 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:31:10,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:10,125 INFO L85 PathProgramCache]: Analyzing trace with hash -169112061, now seen corresponding path program 23 times [2021-11-02 22:31:10,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:10,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480799173] [2021-11-02 22:31:10,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:10,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-11-02 22:31:10,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:10,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480799173] [2021-11-02 22:31:10,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480799173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:10,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357326468] [2021-11-02 22:31:10,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:31:10,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:10,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:10,443 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:10,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 22:31:11,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-11-02 22:31:11,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:31:11,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-02 22:31:11,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-11-02 22:31:11,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357326468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:11,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:31:11,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-02 22:31:11,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118173978] [2021-11-02 22:31:11,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 22:31:11,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:11,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 22:31:11,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:31:11,550 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:11,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:11,734 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2021-11-02 22:31:11,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 22:31:11,735 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-02 22:31:11,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:11,736 INFO L225 Difference]: With dead ends: 221 [2021-11-02 22:31:11,736 INFO L226 Difference]: Without dead ends: 145 [2021-11-02 22:31:11,737 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:31:11,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-02 22:31:11,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 129. [2021-11-02 22:31:11,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:11,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2021-11-02 22:31:11,742 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2021-11-02 22:31:11,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:11,742 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2021-11-02 22:31:11,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:11,743 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2021-11-02 22:31:11,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-02 22:31:11,744 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:11,744 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:11,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:11,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 22:31:11,962 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:31:11,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:11,963 INFO L85 PathProgramCache]: Analyzing trace with hash -99214459, now seen corresponding path program 24 times [2021-11-02 22:31:11,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:11,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731842204] [2021-11-02 22:31:11,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:11,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-11-02 22:31:12,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:12,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731842204] [2021-11-02 22:31:12,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731842204] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:12,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761486405] [2021-11-02 22:31:12,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:31:12,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:12,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:12,347 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:12,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 22:31:16,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-11-02 22:31:16,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:31:16,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 22:31:16,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-11-02 22:31:17,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761486405] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:17,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:31:17,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 30 [2021-11-02 22:31:17,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961286320] [2021-11-02 22:31:17,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 22:31:17,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:17,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 22:31:17,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-11-02 22:31:17,138 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 30 states, 30 states have (on average 4.633333333333334) internal successors, (139), 30 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:17,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:17,346 INFO L93 Difference]: Finished difference Result 224 states and 229 transitions. [2021-11-02 22:31:17,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 22:31:17,347 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.633333333333334) internal successors, (139), 30 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-02 22:31:17,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:17,348 INFO L225 Difference]: With dead ends: 224 [2021-11-02 22:31:17,348 INFO L226 Difference]: Without dead ends: 142 [2021-11-02 22:31:17,349 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=426, Invalid=630, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 22:31:17,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-02 22:31:17,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2021-11-02 22:31:17,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 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) [2021-11-02 22:31:17,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2021-11-02 22:31:17,358 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 128 [2021-11-02 22:31:17,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:17,358 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2021-11-02 22:31:17,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.633333333333334) internal successors, (139), 30 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:17,358 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2021-11-02 22:31:17,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-02 22:31:17,359 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:17,359 INFO L513 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:17,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:17,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 22:31:17,571 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:31:17,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:17,571 INFO L85 PathProgramCache]: Analyzing trace with hash 985253855, now seen corresponding path program 25 times [2021-11-02 22:31:17,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:17,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724634006] [2021-11-02 22:31:17,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:17,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-02 22:31:17,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:17,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724634006] [2021-11-02 22:31:17,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724634006] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:17,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249626806] [2021-11-02 22:31:17,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:31:17,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:17,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:17,963 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:17,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 22:31:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:18,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 22:31:18,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-02 22:31:18,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249626806] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:18,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:31:18,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-02 22:31:18,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311216526] [2021-11-02 22:31:18,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 22:31:18,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:18,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 22:31:18,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-02 22:31:18,807 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 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) [2021-11-02 22:31:18,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:18,976 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2021-11-02 22:31:18,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 22:31:18,976 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 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 139 [2021-11-02 22:31:18,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:18,977 INFO L225 Difference]: With dead ends: 236 [2021-11-02 22:31:18,978 INFO L226 Difference]: Without dead ends: 151 [2021-11-02 22:31:18,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-02 22:31:18,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-02 22:31:18,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 142. [2021-11-02 22:31:18,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:18,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2021-11-02 22:31:18,983 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 139 [2021-11-02 22:31:18,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:18,984 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2021-11-02 22:31:18,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 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) [2021-11-02 22:31:18,984 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2021-11-02 22:31:18,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-02 22:31:18,986 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:18,986 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:19,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:19,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:19,210 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:31:19,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:19,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1518551651, now seen corresponding path program 26 times [2021-11-02 22:31:19,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:19,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773676854] [2021-11-02 22:31:19,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:19,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1756 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-02 22:31:19,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:19,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773676854] [2021-11-02 22:31:19,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773676854] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:19,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495328559] [2021-11-02 22:31:19,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:31:19,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:19,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:19,616 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:19,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 22:31:20,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:31:20,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:31:20,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 22:31:20,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1756 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-02 22:31:20,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495328559] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:20,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:31:20,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-02 22:31:20,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373034401] [2021-11-02 22:31:20,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 22:31:20,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:20,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 22:31:20,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-02 22:31:20,491 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:20,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:20,706 INFO L93 Difference]: Finished difference Result 245 states and 247 transitions. [2021-11-02 22:31:20,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 22:31:20,707 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-02 22:31:20,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:20,708 INFO L225 Difference]: With dead ends: 245 [2021-11-02 22:31:20,708 INFO L226 Difference]: Without dead ends: 160 [2021-11-02 22:31:20,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-02 22:31:20,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-02 22:31:20,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 144. [2021-11-02 22:31:20,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:20,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2021-11-02 22:31:20,713 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 141 [2021-11-02 22:31:20,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:20,714 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2021-11-02 22:31:20,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:20,714 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2021-11-02 22:31:20,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-02 22:31:20,743 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:20,744 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:20,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:20,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 22:31:20,944 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:31:20,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:20,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1801010139, now seen corresponding path program 27 times [2021-11-02 22:31:20,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:20,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576753900] [2021-11-02 22:31:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:20,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1811 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-02 22:31:21,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:21,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576753900] [2021-11-02 22:31:21,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576753900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:21,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225280875] [2021-11-02 22:31:21,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:31:21,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:21,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:21,398 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:21,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 22:31:25,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-11-02 22:31:25,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:31:25,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 22:31:25,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1811 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-11-02 22:31:26,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225280875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:26,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:31:26,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 33 [2021-11-02 22:31:26,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240134466] [2021-11-02 22:31:26,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-02 22:31:26,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:26,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-02 22:31:26,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 22:31:26,310 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 33 states, 33 states have (on average 4.666666666666667) internal successors, (154), 33 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:26,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:26,493 INFO L93 Difference]: Finished difference Result 248 states and 253 transitions. [2021-11-02 22:31:26,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 22:31:26,493 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.666666666666667) internal successors, (154), 33 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-02 22:31:26,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:26,494 INFO L225 Difference]: With dead ends: 248 [2021-11-02 22:31:26,494 INFO L226 Difference]: Without dead ends: 157 [2021-11-02 22:31:26,495 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=516, Invalid=744, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 22:31:26,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-02 22:31:26,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2021-11-02 22:31:26,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 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) [2021-11-02 22:31:26,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2021-11-02 22:31:26,499 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 143 [2021-11-02 22:31:26,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:26,499 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2021-11-02 22:31:26,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.666666666666667) internal successors, (154), 33 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:26,500 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2021-11-02 22:31:26,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-02 22:31:26,501 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:26,502 INFO L513 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:26,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:26,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:26,725 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:31:26,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:26,726 INFO L85 PathProgramCache]: Analyzing trace with hash -355194355, now seen corresponding path program 28 times [2021-11-02 22:31:26,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:26,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298901244] [2021-11-02 22:31:26,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:26,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-11-02 22:31:27,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:27,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298901244] [2021-11-02 22:31:27,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298901244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:27,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409337679] [2021-11-02 22:31:27,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:31:27,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:27,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:27,175 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:27,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 22:31:27,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:31:27,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:31:27,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 22:31:27,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-11-02 22:31:28,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409337679] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:28,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:31:28,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-11-02 22:31:28,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580088573] [2021-11-02 22:31:28,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-02 22:31:28,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:28,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-02 22:31:28,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 22:31:28,222 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 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) [2021-11-02 22:31:28,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:28,411 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2021-11-02 22:31:28,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 22:31:28,412 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-11-02 22:31:28,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:28,412 INFO L225 Difference]: With dead ends: 260 [2021-11-02 22:31:28,412 INFO L226 Difference]: Without dead ends: 166 [2021-11-02 22:31:28,413 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 22:31:28,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-02 22:31:28,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 157. [2021-11-02 22:31:28,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:28,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2021-11-02 22:31:28,420 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2021-11-02 22:31:28,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:28,420 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2021-11-02 22:31:28,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 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) [2021-11-02 22:31:28,420 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2021-11-02 22:31:28,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-02 22:31:28,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:28,422 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:28,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-02 22:31:28,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-02 22:31:28,646 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:31:28,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:28,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1735082127, now seen corresponding path program 29 times [2021-11-02 22:31:28,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:28,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045484034] [2021-11-02 22:31:28,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:28,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2176 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-11-02 22:31:29,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:29,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045484034] [2021-11-02 22:31:29,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045484034] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:29,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88726814] [2021-11-02 22:31:29,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:31:29,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:29,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:29,183 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:29,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 22:31:32,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-11-02 22:31:32,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:31:32,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-02 22:31:32,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2176 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-11-02 22:31:32,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88726814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:32,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:31:32,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-11-02 22:31:32,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302810431] [2021-11-02 22:31:32,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-02 22:31:32,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:32,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-02 22:31:32,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 22:31:32,746 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:32,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:32,933 INFO L93 Difference]: Finished difference Result 269 states and 271 transitions. [2021-11-02 22:31:32,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 22:31:32,934 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-11-02 22:31:32,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:32,935 INFO L225 Difference]: With dead ends: 269 [2021-11-02 22:31:32,935 INFO L226 Difference]: Without dead ends: 175 [2021-11-02 22:31:32,936 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 22:31:32,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-02 22:31:32,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 159. [2021-11-02 22:31:32,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:32,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2021-11-02 22:31:32,940 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2021-11-02 22:31:32,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:32,941 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2021-11-02 22:31:32,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:32,941 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2021-11-02 22:31:32,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-02 22:31:32,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:32,942 INFO L513 BasicCegarLoop]: trace histogram [31, 31, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:32,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-02 22:31:33,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-02 22:31:33,151 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:31:33,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:33,151 INFO L85 PathProgramCache]: Analyzing trace with hash 446086801, now seen corresponding path program 30 times [2021-11-02 22:31:33,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:33,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357066154] [2021-11-02 22:31:33,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:33,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2237 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-11-02 22:31:33,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:33,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357066154] [2021-11-02 22:31:33,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357066154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:33,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815713721] [2021-11-02 22:31:33,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:31:33,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:33,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:33,679 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:33,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-02 22:31:40,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2021-11-02 22:31:40,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:31:40,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 22:31:40,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2237 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-11-02 22:31:40,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815713721] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:40,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:31:40,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-11-02 22:31:40,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794197650] [2021-11-02 22:31:40,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-02 22:31:40,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:40,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-02 22:31:40,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 22:31:40,915 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:41,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:41,119 INFO L93 Difference]: Finished difference Result 278 states and 280 transitions. [2021-11-02 22:31:41,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 22:31:41,120 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 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 158 [2021-11-02 22:31:41,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:41,121 INFO L225 Difference]: With dead ends: 278 [2021-11-02 22:31:41,121 INFO L226 Difference]: Without dead ends: 184 [2021-11-02 22:31:41,121 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 22:31:41,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-02 22:31:41,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 161. [2021-11-02 22:31:41,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.0125) internal successors, (162), 160 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) [2021-11-02 22:31:41,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2021-11-02 22:31:41,127 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2021-11-02 22:31:41,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:41,128 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2021-11-02 22:31:41,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:41,128 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2021-11-02 22:31:41,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-02 22:31:41,128 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:41,129 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:41,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-02 22:31:41,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-02 22:31:41,329 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:31:41,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:41,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1327840237, now seen corresponding path program 31 times [2021-11-02 22:31:41,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:41,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352692111] [2021-11-02 22:31:41,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:41,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:41,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:41,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-11-02 22:31:41,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:41,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352692111] [2021-11-02 22:31:41,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352692111] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:41,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278489478] [2021-11-02 22:31:41,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:31:41,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:41,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:41,903 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:41,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-02 22:31:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:42,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-02 22:31:42,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-11-02 22:31:43,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278489478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:43,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:31:43,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-11-02 22:31:43,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612992972] [2021-11-02 22:31:43,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-02 22:31:43,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:43,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-02 22:31:43,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 22:31:43,040 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 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) [2021-11-02 22:31:43,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:43,287 INFO L93 Difference]: Finished difference Result 287 states and 289 transitions. [2021-11-02 22:31:43,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-02 22:31:43,288 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-11-02 22:31:43,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:43,288 INFO L225 Difference]: With dead ends: 287 [2021-11-02 22:31:43,289 INFO L226 Difference]: Without dead ends: 193 [2021-11-02 22:31:43,289 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 22:31:43,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-02 22:31:43,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 163. [2021-11-02 22:31:43,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0123456790123457) internal successors, (164), 162 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:43,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2021-11-02 22:31:43,295 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2021-11-02 22:31:43,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:43,295 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2021-11-02 22:31:43,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 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) [2021-11-02 22:31:43,295 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2021-11-02 22:31:43,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-02 22:31:43,296 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:43,296 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:43,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:43,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-02 22:31:43,496 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:31:43,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:43,497 INFO L85 PathProgramCache]: Analyzing trace with hash -969707243, now seen corresponding path program 32 times [2021-11-02 22:31:43,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:43,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795837656] [2021-11-02 22:31:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:43,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2365 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-11-02 22:31:44,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:44,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795837656] [2021-11-02 22:31:44,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795837656] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:44,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650394150] [2021-11-02 22:31:44,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:31:44,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:44,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:44,091 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:44,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-02 22:31:45,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:31:45,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:31:45,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 22:31:45,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2365 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-11-02 22:31:45,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650394150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:45,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:31:45,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-11-02 22:31:45,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644052469] [2021-11-02 22:31:45,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-02 22:31:45,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:45,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-02 22:31:45,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 22:31:45,412 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:45,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:45,654 INFO L93 Difference]: Finished difference Result 296 states and 298 transitions. [2021-11-02 22:31:45,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 22:31:45,654 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2021-11-02 22:31:45,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:45,656 INFO L225 Difference]: With dead ends: 296 [2021-11-02 22:31:45,656 INFO L226 Difference]: Without dead ends: 202 [2021-11-02 22:31:45,657 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 22:31:45,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-02 22:31:45,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 165. [2021-11-02 22:31:45,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 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) [2021-11-02 22:31:45,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2021-11-02 22:31:45,662 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2021-11-02 22:31:45,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:45,662 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2021-11-02 22:31:45,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:45,663 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2021-11-02 22:31:45,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-02 22:31:45,664 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:45,664 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:45,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-02 22:31:45,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-02 22:31:45,886 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:31:45,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:45,887 INFO L85 PathProgramCache]: Analyzing trace with hash -401283689, now seen corresponding path program 33 times [2021-11-02 22:31:45,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:45,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855077899] [2021-11-02 22:31:45,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:45,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2432 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-11-02 22:31:46,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:46,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855077899] [2021-11-02 22:31:46,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855077899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:46,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77754986] [2021-11-02 22:31:46,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:31:46,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:46,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:46,439 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:46,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-02 22:31:48,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-11-02 22:31:48,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:31:48,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 22:31:48,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2432 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-11-02 22:31:49,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77754986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:49,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:31:49,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 33] total 39 [2021-11-02 22:31:49,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715695929] [2021-11-02 22:31:49,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-02 22:31:49,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:49,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-02 22:31:49,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 22:31:49,233 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 39 states, 39 states have (on average 4.487179487179487) internal successors, (175), 39 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:49,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:49,544 INFO L93 Difference]: Finished difference Result 293 states and 301 transitions. [2021-11-02 22:31:49,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-02 22:31:49,544 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.487179487179487) internal successors, (175), 39 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-11-02 22:31:49,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:49,547 INFO L225 Difference]: With dead ends: 293 [2021-11-02 22:31:49,547 INFO L226 Difference]: Without dead ends: 187 [2021-11-02 22:31:49,549 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 22:31:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-02 22:31:49,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2021-11-02 22:31:49,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 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) [2021-11-02 22:31:49,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2021-11-02 22:31:49,555 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 164 [2021-11-02 22:31:49,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:49,555 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2021-11-02 22:31:49,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.487179487179487) internal successors, (175), 39 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:49,556 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2021-11-02 22:31:49,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-02 22:31:49,557 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:49,557 INFO L513 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:49,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:49,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:49,774 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:31:49,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:49,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1690262503, now seen corresponding path program 34 times [2021-11-02 22:31:49,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:49,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516859866] [2021-11-02 22:31:49,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:49,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:49,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2021-11-02 22:31:50,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:50,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516859866] [2021-11-02 22:31:50,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516859866] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:50,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812302921] [2021-11-02 22:31:50,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:31:50,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:50,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:50,450 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:50,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-02 22:31:51,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:31:51,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:31:51,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 22:31:51,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2021-11-02 22:31:51,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812302921] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:51,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:31:51,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-11-02 22:31:51,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591200953] [2021-11-02 22:31:51,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-02 22:31:51,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:51,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-02 22:31:51,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 22:31:51,786 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 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) [2021-11-02 22:31:52,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:52,057 INFO L93 Difference]: Finished difference Result 308 states and 310 transitions. [2021-11-02 22:31:52,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-02 22:31:52,058 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 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) Word has length 184 [2021-11-02 22:31:52,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:52,059 INFO L225 Difference]: With dead ends: 308 [2021-11-02 22:31:52,060 INFO L226 Difference]: Without dead ends: 196 [2021-11-02 22:31:52,062 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 22:31:52,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-02 22:31:52,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 187. [2021-11-02 22:31:52,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.010752688172043) internal successors, (188), 186 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:52,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2021-11-02 22:31:52,068 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2021-11-02 22:31:52,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:52,069 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2021-11-02 22:31:52,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 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) [2021-11-02 22:31:52,069 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2021-11-02 22:31:52,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-02 22:31:52,070 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:52,070 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:52,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:52,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:52,290 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:31:52,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:52,291 INFO L85 PathProgramCache]: Analyzing trace with hash -721229029, now seen corresponding path program 35 times [2021-11-02 22:31:52,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:52,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127156218] [2021-11-02 22:31:52,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:52,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:52,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2021-11-02 22:31:52,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:52,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127156218] [2021-11-02 22:31:52,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127156218] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:52,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738414706] [2021-11-02 22:31:52,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:31:52,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:52,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:52,986 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:52,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-02 22:31:55,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2021-11-02 22:31:55,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:31:55,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-02 22:31:55,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2021-11-02 22:31:56,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738414706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:56,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:31:56,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-11-02 22:31:56,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373325069] [2021-11-02 22:31:56,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-02 22:31:56,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:56,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-02 22:31:56,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 22:31:56,077 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand has 40 states, 40 states have (on average 2.15) internal successors, (86), 40 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:56,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:56,337 INFO L93 Difference]: Finished difference Result 317 states and 319 transitions. [2021-11-02 22:31:56,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 22:31:56,337 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 40 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 186 [2021-11-02 22:31:56,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:56,339 INFO L225 Difference]: With dead ends: 317 [2021-11-02 22:31:56,340 INFO L226 Difference]: Without dead ends: 205 [2021-11-02 22:31:56,341 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 22:31:56,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-02 22:31:56,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 189. [2021-11-02 22:31:56,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:56,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2021-11-02 22:31:56,346 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2021-11-02 22:31:56,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:56,347 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2021-11-02 22:31:56,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 40 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:56,348 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2021-11-02 22:31:56,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-02 22:31:56,349 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:56,350 INFO L513 BasicCegarLoop]: trace histogram [37, 37, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:56,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:56,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-02 22:31:56,558 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:31:56,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:56,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1487963747, now seen corresponding path program 36 times [2021-11-02 22:31:56,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:56,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969630415] [2021-11-02 22:31:56,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:56,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3224 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2021-11-02 22:31:57,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:57,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969630415] [2021-11-02 22:31:57,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969630415] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:57,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465733933] [2021-11-02 22:31:57,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:31:57,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:57,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:57,259 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:57,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-02 22:33:00,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2021-11-02 22:33:00,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:33:01,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 22:33:01,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:33:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3224 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2021-11-02 22:33:01,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465733933] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:33:01,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:33:01,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 42 [2021-11-02 22:33:01,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230225579] [2021-11-02 22:33:01,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-02 22:33:01,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:33:01,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-02 22:33:01,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 22:33:01,441 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 42 states, 42 states have (on average 4.738095238095238) internal successors, (199), 42 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:33:01,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:33:01,787 INFO L93 Difference]: Finished difference Result 320 states and 325 transitions. [2021-11-02 22:33:01,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-02 22:33:01,787 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.738095238095238) internal successors, (199), 42 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-11-02 22:33:01,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:33:01,789 INFO L225 Difference]: With dead ends: 320 [2021-11-02 22:33:01,789 INFO L226 Difference]: Without dead ends: 202 [2021-11-02 22:33:01,790 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=840, Invalid=1140, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 22:33:01,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-02 22:33:01,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2021-11-02 22:33:01,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.0100502512562815) internal successors, (201), 199 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) [2021-11-02 22:33:01,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2021-11-02 22:33:01,797 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 188 [2021-11-02 22:33:01,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:33:01,798 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2021-11-02 22:33:01,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.738095238095238) internal successors, (199), 42 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:33:01,798 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2021-11-02 22:33:01,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-02 22:33:01,800 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:33:01,800 INFO L513 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:33:01,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-02 22:33:02,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-02 22:33:02,006 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:33:02,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:33:02,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1448092615, now seen corresponding path program 37 times [2021-11-02 22:33:02,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:33:02,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798970900] [2021-11-02 22:33:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:33:02,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:33:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2021-11-02 22:33:02,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:33:02,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798970900] [2021-11-02 22:33:02,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798970900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:33:02,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132684002] [2021-11-02 22:33:02,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:33:02,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:33:02,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:33:02,760 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:33:02,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-02 22:33:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:03,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-02 22:33:03,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:33:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2021-11-02 22:33:04,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132684002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:33:04,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:33:04,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-11-02 22:33:04,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111307555] [2021-11-02 22:33:04,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-02 22:33:04,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:33:04,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-02 22:33:04,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 22:33:04,228 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 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) [2021-11-02 22:33:04,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:33:04,498 INFO L93 Difference]: Finished difference Result 332 states and 334 transitions. [2021-11-02 22:33:04,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-02 22:33:04,503 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 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) Word has length 199 [2021-11-02 22:33:04,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:33:04,504 INFO L225 Difference]: With dead ends: 332 [2021-11-02 22:33:04,504 INFO L226 Difference]: Without dead ends: 211 [2021-11-02 22:33:04,505 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 22:33:04,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-02 22:33:04,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 202. [2021-11-02 22:33:04,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.0099502487562189) internal successors, (203), 201 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:33:04,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2021-11-02 22:33:04,514 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 199 [2021-11-02 22:33:04,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:33:04,515 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2021-11-02 22:33:04,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 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) [2021-11-02 22:33:04,515 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2021-11-02 22:33:04,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-02 22:33:04,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:33:04,517 INFO L513 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:33:04,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-02 22:33:04,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-02 22:33:04,742 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:33:04,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:33:04,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1476049029, now seen corresponding path program 38 times [2021-11-02 22:33:04,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:33:04,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812105031] [2021-11-02 22:33:04,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:33:04,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:33:04,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:05,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3706 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2021-11-02 22:33:05,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:33:05,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812105031] [2021-11-02 22:33:05,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812105031] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:33:05,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098304836] [2021-11-02 22:33:05,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:33:05,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:33:05,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:33:05,450 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:33:05,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-02 22:33:06,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:33:06,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:33:06,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 22:33:06,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:33:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3706 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2021-11-02 22:33:06,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098304836] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:33:06,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:33:06,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-11-02 22:33:06,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217534223] [2021-11-02 22:33:06,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-02 22:33:06,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:33:06,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-02 22:33:07,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 22:33:07,010 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:33:07,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:33:07,301 INFO L93 Difference]: Finished difference Result 341 states and 343 transitions. [2021-11-02 22:33:07,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-02 22:33:07,301 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2021-11-02 22:33:07,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:33:07,303 INFO L225 Difference]: With dead ends: 341 [2021-11-02 22:33:07,303 INFO L226 Difference]: Without dead ends: 220 [2021-11-02 22:33:07,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 22:33:07,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-02 22:33:07,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 204. [2021-11-02 22:33:07,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0098522167487685) internal successors, (205), 203 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:33:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2021-11-02 22:33:07,310 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 201 [2021-11-02 22:33:07,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:33:07,311 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2021-11-02 22:33:07,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:33:07,311 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2021-11-02 22:33:07,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-02 22:33:07,312 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:33:07,313 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:33:07,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-02 22:33:07,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:33:07,526 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:33:07,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:33:07,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1722608189, now seen corresponding path program 39 times [2021-11-02 22:33:07,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:33:07,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969330140] [2021-11-02 22:33:07,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:33:07,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:33:07,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:08,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2021-11-02 22:33:08,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:33:08,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969330140] [2021-11-02 22:33:08,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969330140] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:33:08,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933721377] [2021-11-02 22:33:08,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:33:08,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:33:08,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:33:08,275 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:33:08,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-02 22:33:51,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2021-11-02 22:33:51,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:33:51,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-02 22:33:51,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:33:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-11-02 22:33:52,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933721377] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:33:52,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:33:52,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 45 [2021-11-02 22:33:52,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319937554] [2021-11-02 22:33:52,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-02 22:33:52,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:33:52,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-02 22:33:52,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 22:33:52,099 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand has 45 states, 45 states have (on average 4.7555555555555555) internal successors, (214), 45 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:33:52,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:33:52,399 INFO L93 Difference]: Finished difference Result 344 states and 349 transitions. [2021-11-02 22:33:52,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-02 22:33:52,399 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.7555555555555555) internal successors, (214), 45 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2021-11-02 22:33:52,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:33:52,400 INFO L225 Difference]: With dead ends: 344 [2021-11-02 22:33:52,400 INFO L226 Difference]: Without dead ends: 217 [2021-11-02 22:33:52,401 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=966, Invalid=1290, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 22:33:52,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-02 22:33:52,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 215. [2021-11-02 22:33:52,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.0093457943925233) internal successors, (216), 214 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) [2021-11-02 22:33:52,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2021-11-02 22:33:52,407 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 203 [2021-11-02 22:33:52,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:33:52,407 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2021-11-02 22:33:52,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.7555555555555555) internal successors, (214), 45 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:33:52,407 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2021-11-02 22:33:52,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-02 22:33:52,409 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:33:52,409 INFO L513 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:33:52,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-11-02 22:33:52,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:33:52,623 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:33:52,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:33:52,623 INFO L85 PathProgramCache]: Analyzing trace with hash -518015451, now seen corresponding path program 40 times [2021-11-02 22:33:52,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:33:52,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038609707] [2021-11-02 22:33:52,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:33:52,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:33:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:53,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4223 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-11-02 22:33:53,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:33:53,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038609707] [2021-11-02 22:33:53,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038609707] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:33:53,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487208545] [2021-11-02 22:33:53,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:33:53,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:33:53,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:33:53,501 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:33:53,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-02 22:33:54,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:33:54,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:33:54,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 22:33:54,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:33:55,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4223 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-11-02 22:33:55,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487208545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:33:55,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:33:55,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-11-02 22:33:55,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495939542] [2021-11-02 22:33:55,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-02 22:33:55,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:33:55,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-02 22:33:55,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 22:33:55,169 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand has 45 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 45 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) [2021-11-02 22:33:55,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:33:55,421 INFO L93 Difference]: Finished difference Result 356 states and 358 transitions. [2021-11-02 22:33:55,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-02 22:33:55,422 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 45 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 214 [2021-11-02 22:33:55,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:33:55,423 INFO L225 Difference]: With dead ends: 356 [2021-11-02 22:33:55,424 INFO L226 Difference]: Without dead ends: 226 [2021-11-02 22:33:55,424 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 22:33:55,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-02 22:33:55,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 217. [2021-11-02 22:33:55,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.0092592592592593) internal successors, (218), 216 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:33:55,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2021-11-02 22:33:55,431 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 214 [2021-11-02 22:33:55,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:33:55,431 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2021-11-02 22:33:55,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 45 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) [2021-11-02 22:33:55,431 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2021-11-02 22:33:55,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-02 22:33:55,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:33:55,433 INFO L513 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:33:55,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-02 22:33:55,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:33:55,658 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:33:55,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:33:55,659 INFO L85 PathProgramCache]: Analyzing trace with hash -725791321, now seen corresponding path program 41 times [2021-11-02 22:33:55,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:33:55,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977258852] [2021-11-02 22:33:55,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:33:55,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:33:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4306 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-11-02 22:33:56,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:33:56,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977258852] [2021-11-02 22:33:56,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977258852] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:33:56,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063285160] [2021-11-02 22:33:56,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:33:56,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:33:56,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:33:56,555 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:33:56,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-02 22:34:00,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-11-02 22:34:00,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:34:00,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-02 22:34:00,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:34:00,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4306 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-11-02 22:34:00,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063285160] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:34:00,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:34:00,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-11-02 22:34:00,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552373505] [2021-11-02 22:34:00,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-02 22:34:00,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:34:00,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-02 22:34:00,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 22:34:00,557 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:34:00,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:34:00,871 INFO L93 Difference]: Finished difference Result 365 states and 367 transitions. [2021-11-02 22:34:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-02 22:34:00,871 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 216 [2021-11-02 22:34:00,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:34:00,873 INFO L225 Difference]: With dead ends: 365 [2021-11-02 22:34:00,873 INFO L226 Difference]: Without dead ends: 235 [2021-11-02 22:34:00,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 22:34:00,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-02 22:34:00,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 219. [2021-11-02 22:34:00,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.0091743119266054) internal successors, (220), 218 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:34:00,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2021-11-02 22:34:00,880 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 216 [2021-11-02 22:34:00,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:34:00,880 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2021-11-02 22:34:00,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:34:00,881 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2021-11-02 22:34:00,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-02 22:34:00,882 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:34:00,882 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:34:00,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-02 22:34:01,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-02 22:34:01,098 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:34:01,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:34:01,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1465060521, now seen corresponding path program 42 times [2021-11-02 22:34:01,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:34:01,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244285706] [2021-11-02 22:34:01,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:34:01,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:34:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:34:02,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4391 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-11-02 22:34:02,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:34:02,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244285706] [2021-11-02 22:34:02,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244285706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:34:02,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857793080] [2021-11-02 22:34:02,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:34:02,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:34:02,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:34:02,072 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:34:02,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-02 22:36:12,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2021-11-02 22:36:12,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:36:13,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 22:36:13,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4391 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-11-02 22:36:13,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857793080] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:36:13,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:36:13,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-11-02 22:36:13,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352063225] [2021-11-02 22:36:13,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-02 22:36:13,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:36:13,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-02 22:36:13,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 22:36:13,639 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:13,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:36:13,906 INFO L93 Difference]: Finished difference Result 374 states and 376 transitions. [2021-11-02 22:36:13,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-02 22:36:13,907 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2021-11-02 22:36:13,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:36:13,908 INFO L225 Difference]: With dead ends: 374 [2021-11-02 22:36:13,908 INFO L226 Difference]: Without dead ends: 244 [2021-11-02 22:36:13,909 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 22:36:13,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-02 22:36:13,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 221. [2021-11-02 22:36:13,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.009090909090909) internal successors, (222), 220 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) [2021-11-02 22:36:13,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 222 transitions. [2021-11-02 22:36:13,915 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 222 transitions. Word has length 218 [2021-11-02 22:36:13,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:36:13,915 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 222 transitions. [2021-11-02 22:36:13,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:13,916 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 222 transitions. [2021-11-02 22:36:13,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-02 22:36:13,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:36:13,917 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:36:13,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-11-02 22:36:14,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:36:14,134 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:36:14,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:14,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1955261653, now seen corresponding path program 43 times [2021-11-02 22:36:14,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:14,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628365035] [2021-11-02 22:36:14,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:14,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:14,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4478 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-11-02 22:36:14,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:36:14,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628365035] [2021-11-02 22:36:14,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628365035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:36:14,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960436203] [2021-11-02 22:36:14,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:36:14,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:36:14,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:14,987 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:36:14,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-02 22:36:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:16,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-02 22:36:16,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4478 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-11-02 22:36:16,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960436203] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:36:16,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:36:16,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-11-02 22:36:16,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943609880] [2021-11-02 22:36:16,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-02 22:36:16,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:36:16,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-02 22:36:16,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 22:36:16,903 INFO L87 Difference]: Start difference. First operand 221 states and 222 transitions. Second operand has 48 states, 48 states have (on average 2.125) internal successors, (102), 48 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) [2021-11-02 22:36:17,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:36:17,283 INFO L93 Difference]: Finished difference Result 383 states and 385 transitions. [2021-11-02 22:36:17,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-02 22:36:17,284 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.125) internal successors, (102), 48 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) Word has length 220 [2021-11-02 22:36:17,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:36:17,285 INFO L225 Difference]: With dead ends: 383 [2021-11-02 22:36:17,285 INFO L226 Difference]: Without dead ends: 253 [2021-11-02 22:36:17,286 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 22:36:17,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-02 22:36:17,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 223. [2021-11-02 22:36:17,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.009009009009009) internal successors, (224), 222 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:17,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2021-11-02 22:36:17,292 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 220 [2021-11-02 22:36:17,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:36:17,292 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2021-11-02 22:36:17,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.125) internal successors, (102), 48 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) [2021-11-02 22:36:17,293 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2021-11-02 22:36:17,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-02 22:36:17,294 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:36:17,294 INFO L513 BasicCegarLoop]: trace histogram [45, 45, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:36:17,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:17,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:36:17,518 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:36:17,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:17,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1060077869, now seen corresponding path program 44 times [2021-11-02 22:36:17,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:17,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281617929] [2021-11-02 22:36:17,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:17,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4567 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-11-02 22:36:18,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:36:18,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281617929] [2021-11-02 22:36:18,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281617929] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:36:18,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495138399] [2021-11-02 22:36:18,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:36:18,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:36:18,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:18,526 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:36:18,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-02 22:36:19,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:36:19,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:36:19,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-02 22:36:19,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4567 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-11-02 22:36:20,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495138399] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:36:20,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:36:20,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-11-02 22:36:20,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535578745] [2021-11-02 22:36:20,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-02 22:36:20,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:36:20,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-02 22:36:20,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 22:36:20,430 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand has 49 states, 49 states have (on average 2.122448979591837) internal successors, (104), 49 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:20,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:36:20,746 INFO L93 Difference]: Finished difference Result 392 states and 394 transitions. [2021-11-02 22:36:20,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-02 22:36:20,747 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.122448979591837) internal successors, (104), 49 states have internal predecessors, (104), 0 states have call successors, (0), 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 222 [2021-11-02 22:36:20,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:36:20,748 INFO L225 Difference]: With dead ends: 392 [2021-11-02 22:36:20,748 INFO L226 Difference]: Without dead ends: 262 [2021-11-02 22:36:20,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 22:36:20,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-02 22:36:20,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 225. [2021-11-02 22:36:20,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0089285714285714) internal successors, (226), 224 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) [2021-11-02 22:36:20,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2021-11-02 22:36:20,755 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 222 [2021-11-02 22:36:20,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:36:20,755 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2021-11-02 22:36:20,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.122448979591837) internal successors, (104), 49 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:20,756 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2021-11-02 22:36:20,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-02 22:36:20,757 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:36:20,757 INFO L513 BasicCegarLoop]: trace histogram [46, 46, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:36:20,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-02 22:36:20,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-02 22:36:20,962 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:36:20,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:20,963 INFO L85 PathProgramCache]: Analyzing trace with hash -301566289, now seen corresponding path program 45 times [2021-11-02 22:36:20,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:20,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772194640] [2021-11-02 22:36:20,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:20,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:21,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4658 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-11-02 22:36:21,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:36:21,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772194640] [2021-11-02 22:36:21,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772194640] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:36:21,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583267804] [2021-11-02 22:36:21,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:36:21,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:36:21,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:21,991 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:36:21,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-02 22:37:12,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2021-11-02 22:37:12,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:37:12,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 22:37:12,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:37:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4658 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2021-11-02 22:37:13,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583267804] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:37:13,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:37:13,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 45] total 51 [2021-11-02 22:37:13,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808868663] [2021-11-02 22:37:13,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-02 22:37:13,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:37:13,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-02 22:37:13,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-11-02 22:37:13,406 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand has 51 states, 51 states have (on average 4.607843137254902) internal successors, (235), 51 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:37:13,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:37:13,752 INFO L93 Difference]: Finished difference Result 389 states and 397 transitions. [2021-11-02 22:37:13,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-02 22:37:13,752 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.607843137254902) internal successors, (235), 51 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2021-11-02 22:37:13,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:37:13,753 INFO L225 Difference]: With dead ends: 389 [2021-11-02 22:37:13,753 INFO L226 Difference]: Without dead ends: 247 [2021-11-02 22:37:13,754 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1281, Invalid=1911, Unknown=0, NotChecked=0, Total=3192 [2021-11-02 22:37:13,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-02 22:37:13,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 245. [2021-11-02 22:37:13,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0081967213114753) internal successors, (246), 244 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) [2021-11-02 22:37:13,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 246 transitions. [2021-11-02 22:37:13,760 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 246 transitions. Word has length 224 [2021-11-02 22:37:13,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:37:13,761 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 246 transitions. [2021-11-02 22:37:13,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.607843137254902) internal successors, (235), 51 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:37:13,761 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 246 transitions. [2021-11-02 22:37:13,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-02 22:37:13,762 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:37:13,763 INFO L513 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:37:13,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-11-02 22:37:13,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-02 22:37:13,978 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:37:13,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:37:13,979 INFO L85 PathProgramCache]: Analyzing trace with hash -999022543, now seen corresponding path program 46 times [2021-11-02 22:37:13,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:37:13,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622971938] [2021-11-02 22:37:13,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:37:13,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:37:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:37:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5546 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2021-11-02 22:37:15,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:37:15,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622971938] [2021-11-02 22:37:15,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622971938] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:37:15,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614564639] [2021-11-02 22:37:15,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:37:15,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:37:15,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:37:15,100 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:37:15,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-02 22:37:16,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:37:16,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:37:16,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 22:37:16,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:37:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5546 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2021-11-02 22:37:17,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614564639] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:37:17,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:37:17,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-11-02 22:37:17,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725986340] [2021-11-02 22:37:17,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-02 22:37:17,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:37:17,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-02 22:37:17,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-02 22:37:17,197 INFO L87 Difference]: Start difference. First operand 245 states and 246 transitions. Second operand has 51 states, 51 states have (on average 2.1176470588235294) internal successors, (108), 51 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) [2021-11-02 22:37:17,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:37:17,492 INFO L93 Difference]: Finished difference Result 404 states and 406 transitions. [2021-11-02 22:37:17,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-02 22:37:17,493 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.1176470588235294) internal successors, (108), 51 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) Word has length 244 [2021-11-02 22:37:17,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:37:17,494 INFO L225 Difference]: With dead ends: 404 [2021-11-02 22:37:17,494 INFO L226 Difference]: Without dead ends: 256 [2021-11-02 22:37:17,495 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-02 22:37:17,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-02 22:37:17,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 247. [2021-11-02 22:37:17,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.008130081300813) internal successors, (248), 246 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:37:17,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 248 transitions. [2021-11-02 22:37:17,501 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 248 transitions. Word has length 244 [2021-11-02 22:37:17,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:37:17,502 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 248 transitions. [2021-11-02 22:37:17,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.1176470588235294) internal successors, (108), 51 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) [2021-11-02 22:37:17,502 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 248 transitions. [2021-11-02 22:37:17,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-02 22:37:17,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:37:17,504 INFO L513 BasicCegarLoop]: trace histogram [48, 48, 48, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:37:17,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-02 22:37:17,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-02 22:37:17,730 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:37:17,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:37:17,731 INFO L85 PathProgramCache]: Analyzing trace with hash 866461747, now seen corresponding path program 47 times [2021-11-02 22:37:17,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:37:17,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987124440] [2021-11-02 22:37:17,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:37:17,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:37:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:37:18,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5641 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2021-11-02 22:37:18,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:37:18,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987124440] [2021-11-02 22:37:18,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987124440] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:37:18,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134324218] [2021-11-02 22:37:18,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:37:18,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:37:18,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:37:18,712 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:37:18,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-02 22:37:37,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-11-02 22:37:37,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:37:37,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-02 22:37:37,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:37:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5641 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2021-11-02 22:37:37,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134324218] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:37:37,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:37:37,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-11-02 22:37:37,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91943149] [2021-11-02 22:37:37,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-02 22:37:37,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:37:37,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-02 22:37:37,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 22:37:37,624 INFO L87 Difference]: Start difference. First operand 247 states and 248 transitions. Second operand has 52 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 52 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:37:37,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:37:37,935 INFO L93 Difference]: Finished difference Result 413 states and 415 transitions. [2021-11-02 22:37:37,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-02 22:37:37,935 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 52 states have internal predecessors, (110), 0 states have call successors, (0), 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 [2021-11-02 22:37:37,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:37:37,937 INFO L225 Difference]: With dead ends: 413 [2021-11-02 22:37:37,937 INFO L226 Difference]: Without dead ends: 265 [2021-11-02 22:37:37,938 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 22:37:37,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-02 22:37:37,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 249. [2021-11-02 22:37:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.0080645161290323) internal successors, (250), 248 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:37:37,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2021-11-02 22:37:37,945 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 246 [2021-11-02 22:37:37,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:37:37,946 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2021-11-02 22:37:37,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 52 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:37:37,946 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2021-11-02 22:37:37,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-02 22:37:37,960 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:37:37,960 INFO L513 BasicCegarLoop]: trace histogram [49, 49, 48, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:37:38,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-02 22:37:38,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:37:38,174 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:37:38,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:37:38,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1699465291, now seen corresponding path program 48 times [2021-11-02 22:37:38,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:37:38,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743950188] [2021-11-02 22:37:38,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:37:38,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:37:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:37:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2021-11-02 22:37:39,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:37:39,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743950188] [2021-11-02 22:37:39,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743950188] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:37:39,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688049420] [2021-11-02 22:37:39,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:37:39,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:37:39,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:37:39,241 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:37:39,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-02 22:40:35,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2021-11-02 22:40:35,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:40:35,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-02 22:40:35,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:40:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 2401 trivial. 0 not checked. [2021-11-02 22:40:35,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688049420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:35,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:40:35,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 54 [2021-11-02 22:40:35,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096403024] [2021-11-02 22:40:35,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-02 22:40:35,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:35,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-02 22:40:35,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 22:40:35,956 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand has 54 states, 54 states have (on average 4.796296296296297) internal successors, (259), 54 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:36,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:36,334 INFO L93 Difference]: Finished difference Result 416 states and 421 transitions. [2021-11-02 22:40:36,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-02 22:40:36,334 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.796296296296297) internal successors, (259), 54 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 248 [2021-11-02 22:40:36,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:36,342 INFO L225 Difference]: With dead ends: 416 [2021-11-02 22:40:36,343 INFO L226 Difference]: Without dead ends: 262 [2021-11-02 22:40:36,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1398, Invalid=1794, Unknown=0, NotChecked=0, Total=3192 [2021-11-02 22:40:36,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-02 22:40:36,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2021-11-02 22:40:36,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.0077220077220077) internal successors, (261), 259 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:36,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 261 transitions. [2021-11-02 22:40:36,352 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 261 transitions. Word has length 248 [2021-11-02 22:40:36,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:36,352 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 261 transitions. [2021-11-02 22:40:36,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.796296296296297) internal successors, (259), 54 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:36,353 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 261 transitions. [2021-11-02 22:40:36,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-02 22:40:36,355 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:36,355 INFO L513 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:36,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-02 22:40:36,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:36,574 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:36,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:36,575 INFO L85 PathProgramCache]: Analyzing trace with hash 513187759, now seen corresponding path program 49 times [2021-11-02 22:40:36,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:36,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376991666] [2021-11-02 22:40:36,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:36,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:36,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:37,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6275 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3775 trivial. 0 not checked. [2021-11-02 22:40:37,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:37,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376991666] [2021-11-02 22:40:37,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376991666] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:37,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927546326] [2021-11-02 22:40:37,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:40:37,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:37,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:40:37,945 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:40:37,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-02 22:40:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:39,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-02 22:40:39,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:40:40,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6275 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3775 trivial. 0 not checked. [2021-11-02 22:40:40,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927546326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:40,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:40:40,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-11-02 22:40:40,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422929081] [2021-11-02 22:40:40,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-02 22:40:40,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:40,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-02 22:40:40,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 22:40:40,305 INFO L87 Difference]: Start difference. First operand 260 states and 261 transitions. Second operand has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 54 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) [2021-11-02 22:40:40,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:40,716 INFO L93 Difference]: Finished difference Result 428 states and 430 transitions. [2021-11-02 22:40:40,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-02 22:40:40,717 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 54 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) Word has length 259 [2021-11-02 22:40:40,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:40,718 INFO L225 Difference]: With dead ends: 428 [2021-11-02 22:40:40,718 INFO L226 Difference]: Without dead ends: 271 [2021-11-02 22:40:40,719 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 22:40:40,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-11-02 22:40:40,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 262. [2021-11-02 22:40:40,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.0076628352490422) internal successors, (263), 261 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:40,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2021-11-02 22:40:40,726 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 259 [2021-11-02 22:40:40,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:40,727 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2021-11-02 22:40:40,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 54 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) [2021-11-02 22:40:40,727 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2021-11-02 22:40:40,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-02 22:40:40,729 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:40,729 INFO L513 BasicCegarLoop]: trace histogram [51, 51, 51, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:40,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-02 22:40:40,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:40,939 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:40,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:40,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1722264723, now seen corresponding path program 50 times [2021-11-02 22:40:40,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:40,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952459506] [2021-11-02 22:40:40,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:40,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6376 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 3775 trivial. 0 not checked. [2021-11-02 22:40:42,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:42,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952459506] [2021-11-02 22:40:42,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952459506] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:42,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716397712] [2021-11-02 22:40:42,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:40:42,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:42,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:40:42,262 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:40:42,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-02 22:40:44,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:40:44,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:40:44,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 22:40:44,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:40:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6376 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 3775 trivial. 0 not checked. [2021-11-02 22:40:44,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716397712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:44,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:40:44,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2021-11-02 22:40:44,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470568597] [2021-11-02 22:40:44,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-02 22:40:44,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:44,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-02 22:40:44,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-11-02 22:40:44,640 INFO L87 Difference]: Start difference. First operand 262 states and 263 transitions. Second operand has 55 states, 55 states have (on average 2.109090909090909) internal successors, (116), 55 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) [2021-11-02 22:40:45,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:45,063 INFO L93 Difference]: Finished difference Result 437 states and 439 transitions. [2021-11-02 22:40:45,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-02 22:40:45,063 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.109090909090909) internal successors, (116), 55 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 261 [2021-11-02 22:40:45,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:45,065 INFO L225 Difference]: With dead ends: 437 [2021-11-02 22:40:45,065 INFO L226 Difference]: Without dead ends: 280 [2021-11-02 22:40:45,066 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-11-02 22:40:45,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-02 22:40:45,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 264. [2021-11-02 22:40:45,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.0076045627376427) internal successors, (265), 263 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:45,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 265 transitions. [2021-11-02 22:40:45,073 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 265 transitions. Word has length 261 [2021-11-02 22:40:45,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:45,074 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 265 transitions. [2021-11-02 22:40:45,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.109090909090909) internal successors, (116), 55 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) [2021-11-02 22:40:45,074 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 265 transitions. [2021-11-02 22:40:45,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-02 22:40:45,076 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:45,076 INFO L513 BasicCegarLoop]: trace histogram [52, 52, 51, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:45,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-11-02 22:40:45,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:45,297 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:45,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:45,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1786515371, now seen corresponding path program 51 times [2021-11-02 22:40:45,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:45,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447192540] [2021-11-02 22:40:45,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:45,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6479 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 3775 trivial. 0 not checked. [2021-11-02 22:40:46,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:46,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447192540] [2021-11-02 22:40:46,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447192540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:46,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432294996] [2021-11-02 22:40:46,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:40:46,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:46,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:40:46,461 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:40:46,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-02 22:43:50,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2021-11-02 22:43:50,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:50,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-02 22:43:50,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6479 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 2704 trivial. 0 not checked. [2021-11-02 22:43:51,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432294996] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:51,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:43:51,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 57 [2021-11-02 22:43:51,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228911793] [2021-11-02 22:43:51,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-02 22:43:51,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:51,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-02 22:43:51,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-11-02 22:43:51,154 INFO L87 Difference]: Start difference. First operand 264 states and 265 transitions. Second operand has 57 states, 57 states have (on average 4.807017543859649) internal successors, (274), 57 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:51,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:51,475 INFO L93 Difference]: Finished difference Result 440 states and 445 transitions. [2021-11-02 22:43:51,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-02 22:43:51,475 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 4.807017543859649) internal successors, (274), 57 states have internal predecessors, (274), 0 states have call successors, (0), 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 263 [2021-11-02 22:43:51,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:51,477 INFO L225 Difference]: With dead ends: 440 [2021-11-02 22:43:51,477 INFO L226 Difference]: Without dead ends: 277 [2021-11-02 22:43:51,478 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1560, Invalid=1980, Unknown=0, NotChecked=0, Total=3540 [2021-11-02 22:43:51,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-02 22:43:51,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 275. [2021-11-02 22:43:51,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.0072992700729928) internal successors, (276), 274 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) [2021-11-02 22:43:51,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2021-11-02 22:43:51,508 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 263 [2021-11-02 22:43:51,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:51,508 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2021-11-02 22:43:51,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 4.807017543859649) internal successors, (274), 57 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:51,509 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2021-11-02 22:43:51,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-02 22:43:51,510 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:51,511 INFO L513 BasicCegarLoop]: trace histogram [54, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:51,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-02 22:43:51,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-02 22:43:51,738 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:51,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:51,739 INFO L85 PathProgramCache]: Analyzing trace with hash -834624963, now seen corresponding path program 52 times [2021-11-02 22:43:51,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:51,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7194886] [2021-11-02 22:43:51,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:51,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7049 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 4240 trivial. 0 not checked. [2021-11-02 22:43:52,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:52,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7194886] [2021-11-02 22:43:52,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7194886] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:52,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174809413] [2021-11-02 22:43:52,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:43:52,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:52,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:52,940 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:52,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-02 22:43:54,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:43:54,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:54,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-02 22:43:54,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7049 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 4240 trivial. 0 not checked. [2021-11-02 22:43:55,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174809413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:55,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:43:55,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2021-11-02 22:43:55,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408116457] [2021-11-02 22:43:55,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-02 22:43:55,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:55,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-02 22:43:55,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-02 22:43:55,630 INFO L87 Difference]: Start difference. First operand 275 states and 276 transitions. Second operand has 57 states, 57 states have (on average 2.1052631578947367) internal successors, (120), 57 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) [2021-11-02 22:43:56,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:56,076 INFO L93 Difference]: Finished difference Result 452 states and 454 transitions. [2021-11-02 22:43:56,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-02 22:43:56,077 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1052631578947367) internal successors, (120), 57 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) Word has length 274 [2021-11-02 22:43:56,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:56,078 INFO L225 Difference]: With dead ends: 452 [2021-11-02 22:43:56,078 INFO L226 Difference]: Without dead ends: 286 [2021-11-02 22:43:56,079 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-02 22:43:56,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-02 22:43:56,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 277. [2021-11-02 22:43:56,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.0072463768115942) internal successors, (278), 276 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:56,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2021-11-02 22:43:56,086 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 274 [2021-11-02 22:43:56,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:56,087 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2021-11-02 22:43:56,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.1052631578947367) internal successors, (120), 57 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) [2021-11-02 22:43:56,087 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2021-11-02 22:43:56,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-11-02 22:43:56,089 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:56,089 INFO L513 BasicCegarLoop]: trace histogram [54, 54, 54, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:56,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:56,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:56,314 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:56,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:56,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1044038977, now seen corresponding path program 53 times [2021-11-02 22:43:56,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:56,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660787304] [2021-11-02 22:43:56,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:56,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7156 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 4240 trivial. 0 not checked. [2021-11-02 22:43:57,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:57,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660787304] [2021-11-02 22:43:57,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660787304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:57,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552459652] [2021-11-02 22:43:57,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:43:57,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:57,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:57,702 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:57,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-02 22:44:32,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2021-11-02 22:44:32,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:44:32,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-02 22:44:32,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7156 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 4240 trivial. 0 not checked. [2021-11-02 22:44:33,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552459652] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:33,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:33,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2021-11-02 22:44:33,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984014703] [2021-11-02 22:44:33,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-02 22:44:33,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:33,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-02 22:44:33,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-11-02 22:44:33,055 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:44:33,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:33,526 INFO L93 Difference]: Finished difference Result 461 states and 463 transitions. [2021-11-02 22:44:33,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-02 22:44:33,527 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 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 276 [2021-11-02 22:44:33,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:33,528 INFO L225 Difference]: With dead ends: 461 [2021-11-02 22:44:33,528 INFO L226 Difference]: Without dead ends: 295 [2021-11-02 22:44:33,528 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-11-02 22:44:33,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-02 22:44:33,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 279. [2021-11-02 22:44:33,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.0071942446043165) internal successors, (280), 278 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:44:33,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 280 transitions. [2021-11-02 22:44:33,533 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 280 transitions. Word has length 276 [2021-11-02 22:44:33,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:33,534 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 280 transitions. [2021-11-02 22:44:33,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:44:33,534 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 280 transitions. [2021-11-02 22:44:33,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-11-02 22:44:33,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:33,535 INFO L513 BasicCegarLoop]: trace histogram [55, 55, 54, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:33,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:33,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-02 22:44:33,736 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:33,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:33,736 INFO L85 PathProgramCache]: Analyzing trace with hash -427443519, now seen corresponding path program 54 times [2021-11-02 22:44:33,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:33,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226187280] [2021-11-02 22:44:33,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:33,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:33,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7265 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 4240 trivial. 0 not checked. [2021-11-02 22:44:35,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:35,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226187280] [2021-11-02 22:44:35,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226187280] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:35,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697433157] [2021-11-02 22:44:35,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:44:35,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:35,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:44:35,087 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:44:35,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459e3a1b-2478-4836-a081-703129c615f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process