./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/theatreSquare.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/theatreSquare.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX --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 90f363148c6ea94b18bb0ae0702d2476b109719554576ef0704192e7e62145c3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:30:45,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:30:45,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:30:45,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:30:45,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:30:45,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:30:45,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:30:45,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:30:45,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:30:45,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:30:45,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:30:45,275 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:30:45,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:30:45,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:30:45,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:30:45,282 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:30:45,283 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:30:45,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:30:45,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:30:45,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:30:45,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:30:45,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:30:45,298 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:30:45,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:30:45,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:30:45,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:30:45,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:30:45,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:30:45,308 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:30:45,309 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:30:45,310 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:30:45,311 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:30:45,312 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:30:45,313 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:30:45,315 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:30:45,316 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:30:45,317 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:30:45,317 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:30:45,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:30:45,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:30:45,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:30:45,321 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:30:45,348 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:30:45,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:30:45,349 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:30:45,349 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:30:45,351 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:30:45,351 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:30:45,351 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:30:45,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:30:45,352 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:30:45,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:30:45,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:30:45,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:30:45,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:30:45,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:30:45,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:30:45,354 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:30:45,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:30:45,355 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:30:45,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:30:45,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:30:45,356 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:30:45,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:30:45,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:30:45,357 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:30:45,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:30:45,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:30:45,357 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:30:45,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:30:45,358 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:30:45,358 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:30:45,358 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:30:45,359 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:30:45,359 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_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90f363148c6ea94b18bb0ae0702d2476b109719554576ef0704192e7e62145c3 [2021-11-09 08:30:45,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:30:45,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:30:45,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:30:45,743 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:30:45,744 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:30:45,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2021-11-09 08:30:45,821 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/data/0130aaa24/d6d720cf4b154aaab032a42f51e88f2a/FLAG9087dfb3a [2021-11-09 08:30:46,313 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:30:46,314 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2021-11-09 08:30:46,327 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/data/0130aaa24/d6d720cf4b154aaab032a42f51e88f2a/FLAG9087dfb3a [2021-11-09 08:30:46,703 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/data/0130aaa24/d6d720cf4b154aaab032a42f51e88f2a [2021-11-09 08:30:46,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:30:46,710 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:30:46,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:30:46,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:30:46,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:30:46,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:30:46" (1/1) ... [2021-11-09 08:30:46,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@623012aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:46, skipping insertion in model container [2021-11-09 08:30:46,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:30:46" (1/1) ... [2021-11-09 08:30:46,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:30:46,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:30:47,017 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_ae75ad84-8f8e-4486-b3b0-687da187a3dc/sv-benchmarks/c/loops-crafted-1/theatreSquare.c[370,383] [2021-11-09 08:30:47,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:30:47,058 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:30:47,071 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_ae75ad84-8f8e-4486-b3b0-687da187a3dc/sv-benchmarks/c/loops-crafted-1/theatreSquare.c[370,383] [2021-11-09 08:30:47,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:30:47,097 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:30:47,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:47 WrapperNode [2021-11-09 08:30:47,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:30:47,099 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:30:47,099 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:30:47,100 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:30:47,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:47" (1/1) ... [2021-11-09 08:30:47,116 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:47" (1/1) ... [2021-11-09 08:30:47,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:30:47,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:30:47,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:30:47,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:30:47,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:47" (1/1) ... [2021-11-09 08:30:47,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:47" (1/1) ... [2021-11-09 08:30:47,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:47" (1/1) ... [2021-11-09 08:30:47,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:47" (1/1) ... [2021-11-09 08:30:47,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:47" (1/1) ... [2021-11-09 08:30:47,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:47" (1/1) ... [2021-11-09 08:30:47,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:47" (1/1) ... [2021-11-09 08:30:47,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:30:47,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:30:47,166 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:30:47,166 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:30:47,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:47" (1/1) ... [2021-11-09 08:30:47,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:30:47,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:47,211 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:30:47,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:30:47,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:30:47,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:30:47,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:30:47,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:30:47,515 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:30:47,515 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-11-09 08:30:47,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:30:47 BoogieIcfgContainer [2021-11-09 08:30:47,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:30:47,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:30:47,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:30:47,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:30:47,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:30:46" (1/3) ... [2021-11-09 08:30:47,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148f9f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:30:47, skipping insertion in model container [2021-11-09 08:30:47,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:47" (2/3) ... [2021-11-09 08:30:47,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148f9f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:30:47, skipping insertion in model container [2021-11-09 08:30:47,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:30:47" (3/3) ... [2021-11-09 08:30:47,527 INFO L111 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2021-11-09 08:30:47,533 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:30:47,533 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:30:47,602 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:30:47,608 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 [2021-11-09 08:30:47,608 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:30:47,639 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 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) [2021-11-09 08:30:47,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-09 08:30:47,644 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:47,644 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-09 08:30:47,645 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:47,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:47,651 INFO L85 PathProgramCache]: Analyzing trace with hash 891969447, now seen corresponding path program 1 times [2021-11-09 08:30:47,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:47,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437290834] [2021-11-09 08:30:47,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:47,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:47,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:47,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437290834] [2021-11-09 08:30:47,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437290834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:47,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:47,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:30:47,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771960011] [2021-11-09 08:30:48,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:30:48,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:48,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:30:48,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:30:48,028 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 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) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:48,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:48,086 INFO L93 Difference]: Finished difference Result 48 states and 71 transitions. [2021-11-09 08:30:48,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:30:48,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-09 08:30:48,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:48,098 INFO L225 Difference]: With dead ends: 48 [2021-11-09 08:30:48,100 INFO L226 Difference]: Without dead ends: 19 [2021-11-09 08:30:48,104 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 [2021-11-09 08:30:48,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-09 08:30:48,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-09 08:30:48,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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) [2021-11-09 08:30:48,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-11-09 08:30:48,152 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 6 [2021-11-09 08:30:48,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:48,154 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-11-09 08:30:48,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:48,156 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-11-09 08:30:48,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 08:30:48,157 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:48,158 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:48,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:30:48,159 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:48,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:48,166 INFO L85 PathProgramCache]: Analyzing trace with hash 535820783, now seen corresponding path program 1 times [2021-11-09 08:30:48,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:48,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956435659] [2021-11-09 08:30:48,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:48,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:48,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:48,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956435659] [2021-11-09 08:30:48,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956435659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:48,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:48,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-09 08:30:48,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656309009] [2021-11-09 08:30:48,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:30:48,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:48,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:30:48,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:30:48,343 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:48,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:48,565 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-11-09 08:30:48,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:30:48,566 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-09 08:30:48,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:48,567 INFO L225 Difference]: With dead ends: 39 [2021-11-09 08:30:48,567 INFO L226 Difference]: Without dead ends: 33 [2021-11-09 08:30:48,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:30:48,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-09 08:30:48,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2021-11-09 08:30:48,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:48,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2021-11-09 08:30:48,577 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 18 [2021-11-09 08:30:48,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:48,578 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2021-11-09 08:30:48,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:48,579 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2021-11-09 08:30:48,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 08:30:48,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:48,580 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:48,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:30:48,581 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:48,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:48,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1031838486, now seen corresponding path program 1 times [2021-11-09 08:30:48,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:48,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892790191] [2021-11-09 08:30:48,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:48,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:48,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:48,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:48,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892790191] [2021-11-09 08:30:48,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892790191] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:48,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:48,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:30:48,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955797838] [2021-11-09 08:30:48,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:30:48,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:48,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:30:48,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:30:48,713 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:48,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:48,753 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2021-11-09 08:30:48,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:30:48,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-09 08:30:48,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:48,755 INFO L225 Difference]: With dead ends: 47 [2021-11-09 08:30:48,755 INFO L226 Difference]: Without dead ends: 37 [2021-11-09 08:30:48,756 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:30:48,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-09 08:30:48,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2021-11-09 08:30:48,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:48,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2021-11-09 08:30:48,769 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 19 [2021-11-09 08:30:48,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:48,770 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2021-11-09 08:30:48,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:48,770 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2021-11-09 08:30:48,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 08:30:48,771 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:48,771 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:48,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:30:48,772 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:48,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:48,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1782670069, now seen corresponding path program 1 times [2021-11-09 08:30:48,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:48,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092720397] [2021-11-09 08:30:48,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:48,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:48,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:48,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092720397] [2021-11-09 08:30:48,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092720397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:48,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:48,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:30:48,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316784386] [2021-11-09 08:30:48,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:30:48,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:48,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:30:48,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:30:48,870 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:48,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:48,905 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2021-11-09 08:30:48,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:30:48,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-09 08:30:48,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:48,917 INFO L225 Difference]: With dead ends: 66 [2021-11-09 08:30:48,917 INFO L226 Difference]: Without dead ends: 49 [2021-11-09 08:30:48,917 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:30:48,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-09 08:30:48,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2021-11-09 08:30:48,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:48,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2021-11-09 08:30:48,928 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 19 [2021-11-09 08:30:48,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:48,929 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2021-11-09 08:30:48,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:48,929 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2021-11-09 08:30:48,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 08:30:48,930 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:48,931 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:48,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 08:30:48,931 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:48,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:48,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1545632287, now seen corresponding path program 1 times [2021-11-09 08:30:48,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:48,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128608872] [2021-11-09 08:30:48,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:48,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:49,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:30:49,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:49,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128608872] [2021-11-09 08:30:49,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128608872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:49,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:49,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:30:49,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148251665] [2021-11-09 08:30:49,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:30:49,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:49,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:30:49,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:30:49,009 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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) [2021-11-09 08:30:49,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:49,023 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2021-11-09 08:30:49,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:49,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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 20 [2021-11-09 08:30:49,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:49,025 INFO L225 Difference]: With dead ends: 49 [2021-11-09 08:30:49,025 INFO L226 Difference]: Without dead ends: 32 [2021-11-09 08:30:49,026 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 [2021-11-09 08:30:49,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-09 08:30:49,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-09 08:30:49,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 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) [2021-11-09 08:30:49,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-11-09 08:30:49,033 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 20 [2021-11-09 08:30:49,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:49,034 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-11-09 08:30:49,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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) [2021-11-09 08:30:49,034 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-11-09 08:30:49,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 08:30:49,035 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:49,035 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:49,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 08:30:49,036 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:49,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:49,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1312537087, now seen corresponding path program 1 times [2021-11-09 08:30:49,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:49,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605966245] [2021-11-09 08:30:49,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:49,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:49,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:30:49,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:49,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605966245] [2021-11-09 08:30:49,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605966245] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:49,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:49,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:30:49,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000911518] [2021-11-09 08:30:49,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:30:49,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:49,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:30:49,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:30:49,136 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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) [2021-11-09 08:30:49,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:49,151 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2021-11-09 08:30:49,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:49,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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 20 [2021-11-09 08:30:49,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:49,153 INFO L225 Difference]: With dead ends: 59 [2021-11-09 08:30:49,153 INFO L226 Difference]: Without dead ends: 33 [2021-11-09 08:30:49,153 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 [2021-11-09 08:30:49,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-09 08:30:49,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-09 08:30:49,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:49,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-11-09 08:30:49,161 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 20 [2021-11-09 08:30:49,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:49,161 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-11-09 08:30:49,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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) [2021-11-09 08:30:49,162 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-11-09 08:30:49,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 08:30:49,163 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:49,163 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:49,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 08:30:49,163 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:49,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:49,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1130312570, now seen corresponding path program 1 times [2021-11-09 08:30:49,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:49,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436141550] [2021-11-09 08:30:49,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:49,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:30:49,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:49,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436141550] [2021-11-09 08:30:49,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436141550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:49,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:49,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:30:49,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182022726] [2021-11-09 08:30:49,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:30:49,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:49,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:30:49,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:30:49,318 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:49,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:49,378 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-11-09 08:30:49,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:30:49,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-09 08:30:49,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:49,384 INFO L225 Difference]: With dead ends: 39 [2021-11-09 08:30:49,385 INFO L226 Difference]: Without dead ends: 30 [2021-11-09 08:30:49,385 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:30:49,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-09 08:30:49,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-09 08:30:49,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2021-11-09 08:30:49,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-11-09 08:30:49,399 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 21 [2021-11-09 08:30:49,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:49,400 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-11-09 08:30:49,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:49,400 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-11-09 08:30:49,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 08:30:49,402 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:49,402 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:49,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 08:30:49,403 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:49,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:49,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1437483694, now seen corresponding path program 1 times [2021-11-09 08:30:49,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:49,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899225227] [2021-11-09 08:30:49,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:49,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:30:49,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:49,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899225227] [2021-11-09 08:30:49,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899225227] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:49,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134143100] [2021-11-09 08:30:49,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:49,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:49,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:49,498 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:49,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:30:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:49,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:30:49,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:30:49,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134143100] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:49,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:30:49,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-09 08:30:49,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452948310] [2021-11-09 08:30:49,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:30:49,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:49,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:30:49,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:30:49,768 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:49,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:49,798 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-11-09 08:30:49,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:30:49,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-09 08:30:49,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:49,802 INFO L225 Difference]: With dead ends: 37 [2021-11-09 08:30:49,802 INFO L226 Difference]: Without dead ends: 23 [2021-11-09 08:30:49,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:30:49,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-09 08:30:49,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-09 08:30:49,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 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) [2021-11-09 08:30:49,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-11-09 08:30:49,812 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 22 [2021-11-09 08:30:49,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:49,812 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-11-09 08:30:49,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:49,813 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-11-09 08:30:49,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 08:30:49,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:49,814 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:49,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:50,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-09 08:30:50,030 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:50,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:50,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1965889039, now seen corresponding path program 1 times [2021-11-09 08:30:50,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:50,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008066829] [2021-11-09 08:30:50,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:50,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:30:50,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:50,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008066829] [2021-11-09 08:30:50,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008066829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:50,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854683919] [2021-11-09 08:30:50,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:50,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:50,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:50,191 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:50,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:30:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:50,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:30:50,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:30:50,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854683919] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:50,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:30:50,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-09 08:30:50,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127061617] [2021-11-09 08:30:50,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:30:50,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:50,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:30:50,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:30:50,362 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:50,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:50,380 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-11-09 08:30:50,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:30:50,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-09 08:30:50,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:50,382 INFO L225 Difference]: With dead ends: 32 [2021-11-09 08:30:50,382 INFO L226 Difference]: Without dead ends: 24 [2021-11-09 08:30:50,383 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:30:50,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-09 08:30:50,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-09 08:30:50,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:50,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-11-09 08:30:50,387 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 22 [2021-11-09 08:30:50,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:50,388 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-11-09 08:30:50,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:50,388 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-11-09 08:30:50,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 08:30:50,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:50,390 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:50,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:50,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:50,618 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:50,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:50,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1829813877, now seen corresponding path program 1 times [2021-11-09 08:30:50,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:50,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962233363] [2021-11-09 08:30:50,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:50,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:30:50,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:50,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962233363] [2021-11-09 08:30:50,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962233363] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:50,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248629118] [2021-11-09 08:30:50,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:50,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:50,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:50,710 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:50,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:30:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:50,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:30:50,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:30:50,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248629118] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:50,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:30:50,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-09 08:30:50,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491326027] [2021-11-09 08:30:50,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:30:50,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:50,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:30:50,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:30:50,902 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:50,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:50,920 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-11-09 08:30:50,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:30:50,921 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-09 08:30:50,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:50,925 INFO L225 Difference]: With dead ends: 31 [2021-11-09 08:30:50,926 INFO L226 Difference]: Without dead ends: 25 [2021-11-09 08:30:50,926 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:30:50,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-09 08:30:50,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-09 08:30:50,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 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) [2021-11-09 08:30:50,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-11-09 08:30:50,940 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 23 [2021-11-09 08:30:50,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:50,940 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-11-09 08:30:50,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:50,941 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-11-09 08:30:50,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 08:30:50,941 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:50,942 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:50,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:51,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 08:30:51,170 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:51,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:51,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1804048560, now seen corresponding path program 1 times [2021-11-09 08:30:51,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:51,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680038074] [2021-11-09 08:30:51,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:51,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:30:51,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:51,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680038074] [2021-11-09 08:30:51,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680038074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:51,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20665949] [2021-11-09 08:30:51,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:51,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:51,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:51,444 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:51,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:30:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:51,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 08:30:51,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:30:52,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20665949] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:52,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:52,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-11-09 08:30:52,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811590237] [2021-11-09 08:30:52,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 08:30:52,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:52,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 08:30:52,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:30:52,021 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:52,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:52,510 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2021-11-09 08:30:52,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 08:30:52,511 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-09 08:30:52,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:52,512 INFO L225 Difference]: With dead ends: 77 [2021-11-09 08:30:52,512 INFO L226 Difference]: Without dead ends: 71 [2021-11-09 08:30:52,513 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 08:30:52,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-09 08:30:52,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 37. [2021-11-09 08:30:52,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 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) [2021-11-09 08:30:52,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-11-09 08:30:52,521 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 24 [2021-11-09 08:30:52,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:52,522 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-11-09 08:30:52,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:52,522 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-11-09 08:30:52,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 08:30:52,523 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:52,523 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:52,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:52,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 08:30:52,750 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:52,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:52,751 INFO L85 PathProgramCache]: Analyzing trace with hash 571706934, now seen corresponding path program 2 times [2021-11-09 08:30:52,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:52,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285410989] [2021-11-09 08:30:52,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:52,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:30:52,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:52,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285410989] [2021-11-09 08:30:52,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285410989] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:52,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011188326] [2021-11-09 08:30:52,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:30:52,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:52,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:52,860 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:52,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:30:52,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:30:52,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:52,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:30:52,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:53,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:30:53,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011188326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:53,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:53,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-09 08:30:53,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929635918] [2021-11-09 08:30:53,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:30:53,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:53,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:30:53,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:30:53,153 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:53,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:53,252 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2021-11-09 08:30:53,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:30:53,253 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-09 08:30:53,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:53,253 INFO L225 Difference]: With dead ends: 63 [2021-11-09 08:30:53,254 INFO L226 Difference]: Without dead ends: 53 [2021-11-09 08:30:53,254 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:30:53,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-09 08:30:53,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2021-11-09 08:30:53,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 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) [2021-11-09 08:30:53,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2021-11-09 08:30:53,262 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 25 [2021-11-09 08:30:53,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:53,262 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2021-11-09 08:30:53,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:53,263 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2021-11-09 08:30:53,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 08:30:53,264 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:53,264 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:53,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:53,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:53,486 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:53,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:53,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1510332885, now seen corresponding path program 3 times [2021-11-09 08:30:53,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:53,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949422936] [2021-11-09 08:30:53,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:53,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:30:53,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:53,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949422936] [2021-11-09 08:30:53,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949422936] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:53,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983488639] [2021-11-09 08:30:53,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:30:53,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:53,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:53,545 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:53,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:30:53,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 08:30:53,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:53,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:30:53,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:30:53,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983488639] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:53,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:53,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-09 08:30:53,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313248601] [2021-11-09 08:30:53,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:30:53,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:53,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:30:53,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:30:53,796 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2021-11-09 08:30:53,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:53,833 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2021-11-09 08:30:53,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:30:53,834 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 25 [2021-11-09 08:30:53,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:53,835 INFO L225 Difference]: With dead ends: 72 [2021-11-09 08:30:53,836 INFO L226 Difference]: Without dead ends: 60 [2021-11-09 08:30:53,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:30:53,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-09 08:30:53,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-11-09 08:30:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 53 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:53,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2021-11-09 08:30:53,852 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 25 [2021-11-09 08:30:53,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:53,852 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2021-11-09 08:30:53,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2021-11-09 08:30:53,852 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2021-11-09 08:30:53,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 08:30:53,862 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:53,862 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:53,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:54,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:54,086 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:54,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:54,087 INFO L85 PathProgramCache]: Analyzing trace with hash 595735960, now seen corresponding path program 4 times [2021-11-09 08:30:54,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:54,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995188942] [2021-11-09 08:30:54,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:54,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:30:54,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:54,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995188942] [2021-11-09 08:30:54,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995188942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:54,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347225353] [2021-11-09 08:30:54,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:30:54,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:54,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:54,159 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:54,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:30:54,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:30:54,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:54,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:30:54,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:54,403 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:30:54,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347225353] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:54,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:54,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-09 08:30:54,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445149518] [2021-11-09 08:30:54,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:30:54,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:54,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:30:54,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:30:54,409 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2021-11-09 08:30:54,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:54,446 INFO L93 Difference]: Finished difference Result 126 states and 157 transitions. [2021-11-09 08:30:54,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:30:54,461 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 25 [2021-11-09 08:30:54,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:54,462 INFO L225 Difference]: With dead ends: 126 [2021-11-09 08:30:54,462 INFO L226 Difference]: Without dead ends: 94 [2021-11-09 08:30:54,463 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:30:54,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-09 08:30:54,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 64. [2021-11-09 08:30:54,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 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) [2021-11-09 08:30:54,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2021-11-09 08:30:54,477 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 25 [2021-11-09 08:30:54,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:54,477 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2021-11-09 08:30:54,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2021-11-09 08:30:54,478 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2021-11-09 08:30:54,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 08:30:54,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:54,479 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:54,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:54,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 08:30:54,706 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:54,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:54,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1299373655, now seen corresponding path program 5 times [2021-11-09 08:30:54,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:54,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896868772] [2021-11-09 08:30:54,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:54,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:54,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:54,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:30:54,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:54,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896868772] [2021-11-09 08:30:54,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896868772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:54,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815465788] [2021-11-09 08:30:54,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:30:54,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:54,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:54,817 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:54,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:30:54,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:30:54,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:54,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:30:54,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:30:55,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815465788] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:55,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:55,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-11-09 08:30:55,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620298905] [2021-11-09 08:30:55,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:30:55,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:55,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:30:55,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:30:55,150 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:55,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:55,303 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2021-11-09 08:30:55,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:30:55,304 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-09 08:30:55,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:55,305 INFO L225 Difference]: With dead ends: 90 [2021-11-09 08:30:55,305 INFO L226 Difference]: Without dead ends: 78 [2021-11-09 08:30:55,306 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:30:55,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-09 08:30:55,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2021-11-09 08:30:55,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 65 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:55,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2021-11-09 08:30:55,319 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 25 [2021-11-09 08:30:55,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:55,319 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2021-11-09 08:30:55,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:55,320 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2021-11-09 08:30:55,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 08:30:55,321 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:55,321 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:55,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:55,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 08:30:55,534 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:55,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:55,535 INFO L85 PathProgramCache]: Analyzing trace with hash -120572194, now seen corresponding path program 6 times [2021-11-09 08:30:55,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:55,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070946991] [2021-11-09 08:30:55,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:55,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:55,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 08:30:55,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:55,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070946991] [2021-11-09 08:30:55,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070946991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:55,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931878470] [2021-11-09 08:30:55,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:30:55,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:55,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:55,700 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:55,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:30:55,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-09 08:30:55,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:55,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:30:55,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:55,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:30:55,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931878470] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:55,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:55,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-11-09 08:30:55,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943036564] [2021-11-09 08:30:55,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:30:55,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:55,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:30:55,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:30:55,966 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:56,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:56,080 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2021-11-09 08:30:56,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:30:56,081 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-09 08:30:56,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:56,084 INFO L225 Difference]: With dead ends: 104 [2021-11-09 08:30:56,084 INFO L226 Difference]: Without dead ends: 79 [2021-11-09 08:30:56,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:30:56,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-09 08:30:56,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2021-11-09 08:30:56,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 66 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2021-11-09 08:30:56,108 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 26 [2021-11-09 08:30:56,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:56,108 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2021-11-09 08:30:56,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:56,109 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2021-11-09 08:30:56,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 08:30:56,109 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:56,110 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:56,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:56,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 08:30:56,326 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:56,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:56,326 INFO L85 PathProgramCache]: Analyzing trace with hash -2006452209, now seen corresponding path program 7 times [2021-11-09 08:30:56,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:56,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106670266] [2021-11-09 08:30:56,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:56,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:30:56,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:56,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106670266] [2021-11-09 08:30:56,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106670266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:56,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104424755] [2021-11-09 08:30:56,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:30:56,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:56,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:56,626 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:56,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 08:30:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:56,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 08:30:56,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:30:57,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104424755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:57,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:57,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-11-09 08:30:57,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689706566] [2021-11-09 08:30:57,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 08:30:57,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:57,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 08:30:57,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-11-09 08:30:57,240 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2021-11-09 08:30:57,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:57,823 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2021-11-09 08:30:57,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 08:30:57,824 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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 26 [2021-11-09 08:30:57,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:57,826 INFO L225 Difference]: With dead ends: 159 [2021-11-09 08:30:57,826 INFO L226 Difference]: Without dead ends: 150 [2021-11-09 08:30:57,827 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=1212, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 08:30:57,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-09 08:30:57,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 88. [2021-11-09 08:30:57,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.2528735632183907) internal successors, (109), 87 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:57,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2021-11-09 08:30:57,860 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 26 [2021-11-09 08:30:57,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:57,861 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2021-11-09 08:30:57,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2021-11-09 08:30:57,861 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2021-11-09 08:30:57,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 08:30:57,863 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:57,863 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:57,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:58,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 08:30:58,078 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:58,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:58,078 INFO L85 PathProgramCache]: Analyzing trace with hash -216163038, now seen corresponding path program 8 times [2021-11-09 08:30:58,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:58,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63191158] [2021-11-09 08:30:58,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:58,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 08:30:58,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:58,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63191158] [2021-11-09 08:30:58,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63191158] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:58,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654143267] [2021-11-09 08:30:58,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:30:58,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:58,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:58,197 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:58,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 08:30:58,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:30:58,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:58,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:30:58,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:30:58,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654143267] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:58,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:58,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2021-11-09 08:30:58,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139781204] [2021-11-09 08:30:58,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:30:58,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:58,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:30:58,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:30:58,552 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2021-11-09 08:30:58,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:58,664 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2021-11-09 08:30:58,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:30:58,665 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 26 [2021-11-09 08:30:58,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:58,666 INFO L225 Difference]: With dead ends: 107 [2021-11-09 08:30:58,666 INFO L226 Difference]: Without dead ends: 92 [2021-11-09 08:30:58,667 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:30:58,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-09 08:30:58,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2021-11-09 08:30:58,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.223529411764706) internal successors, (104), 85 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) [2021-11-09 08:30:58,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2021-11-09 08:30:58,683 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 26 [2021-11-09 08:30:58,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:58,684 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2021-11-09 08:30:58,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2021-11-09 08:30:58,684 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2021-11-09 08:30:58,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 08:30:58,685 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:58,685 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:58,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:58,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 08:30:58,914 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:58,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:58,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1407838889, now seen corresponding path program 9 times [2021-11-09 08:30:58,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:58,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509935951] [2021-11-09 08:30:58,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:58,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:58,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:30:59,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:59,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509935951] [2021-11-09 08:30:59,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509935951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:59,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609855200] [2021-11-09 08:30:59,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:30:59,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:59,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:59,060 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:59,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 08:30:59,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:30:59,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:59,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 08:30:59,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:30:59,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609855200] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:59,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:59,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-09 08:30:59,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774379501] [2021-11-09 08:30:59,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 08:30:59,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:59,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 08:30:59,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:30:59,611 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:59,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:59,935 INFO L93 Difference]: Finished difference Result 131 states and 154 transitions. [2021-11-09 08:30:59,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:30:59,936 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-09 08:30:59,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:59,938 INFO L225 Difference]: With dead ends: 131 [2021-11-09 08:30:59,938 INFO L226 Difference]: Without dead ends: 107 [2021-11-09 08:30:59,939 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2021-11-09 08:30:59,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-09 08:30:59,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 83. [2021-11-09 08:30:59,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 82 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2021-11-09 08:30:59,958 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 27 [2021-11-09 08:30:59,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:59,959 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2021-11-09 08:30:59,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:59,959 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2021-11-09 08:30:59,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 08:30:59,960 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:59,961 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:00,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:00,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:00,186 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:00,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:00,186 INFO L85 PathProgramCache]: Analyzing trace with hash -325007018, now seen corresponding path program 10 times [2021-11-09 08:31:00,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:00,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144115342] [2021-11-09 08:31:00,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:00,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:00,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:31:00,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:00,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144115342] [2021-11-09 08:31:00,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144115342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:00,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008720248] [2021-11-09 08:31:00,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:31:00,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:00,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:00,350 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:00,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 08:31:00,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:31:00,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:00,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 08:31:00,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:31:00,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008720248] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:00,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:00,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-11-09 08:31:00,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442395855] [2021-11-09 08:31:00,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 08:31:00,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:00,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 08:31:00,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:31:00,893 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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) [2021-11-09 08:31:01,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:01,160 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2021-11-09 08:31:01,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:31:01,161 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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) Word has length 27 [2021-11-09 08:31:01,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:01,162 INFO L225 Difference]: With dead ends: 121 [2021-11-09 08:31:01,162 INFO L226 Difference]: Without dead ends: 109 [2021-11-09 08:31:01,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:31:01,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-09 08:31:01,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2021-11-09 08:31:01,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2261904761904763) internal successors, (103), 84 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:01,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2021-11-09 08:31:01,179 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 27 [2021-11-09 08:31:01,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:01,180 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2021-11-09 08:31:01,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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) [2021-11-09 08:31:01,180 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2021-11-09 08:31:01,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 08:31:01,181 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:01,181 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:01,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:01,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-11-09 08:31:01,402 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:01,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:01,402 INFO L85 PathProgramCache]: Analyzing trace with hash 480362644, now seen corresponding path program 11 times [2021-11-09 08:31:01,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:01,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762196960] [2021-11-09 08:31:01,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:01,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 08:31:01,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:01,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762196960] [2021-11-09 08:31:01,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762196960] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:01,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924913782] [2021-11-09 08:31:01,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:31:01,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:01,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:01,478 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:01,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 08:31:01,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:31:01,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:01,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:31:01,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 08:31:01,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924913782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:01,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:01,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-09 08:31:01,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16941390] [2021-11-09 08:31:01,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:31:01,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:01,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:31:01,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:31:01,825 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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) [2021-11-09 08:31:01,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:01,871 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2021-11-09 08:31:01,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:31:01,872 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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 27 [2021-11-09 08:31:01,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:01,872 INFO L225 Difference]: With dead ends: 110 [2021-11-09 08:31:01,873 INFO L226 Difference]: Without dead ends: 77 [2021-11-09 08:31:01,873 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:31:01,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-09 08:31:01,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-11-09 08:31:01,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 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) [2021-11-09 08:31:01,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2021-11-09 08:31:01,887 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 27 [2021-11-09 08:31:01,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:01,887 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2021-11-09 08:31:01,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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) [2021-11-09 08:31:01,887 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2021-11-09 08:31:01,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 08:31:01,888 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:01,888 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:01,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:02,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:02,109 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:02,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:02,110 INFO L85 PathProgramCache]: Analyzing trace with hash 400247189, now seen corresponding path program 12 times [2021-11-09 08:31:02,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:02,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47110606] [2021-11-09 08:31:02,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:02,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 08:31:02,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:02,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47110606] [2021-11-09 08:31:02,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47110606] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:02,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466703593] [2021-11-09 08:31:02,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:31:02,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:02,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:02,180 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:02,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 08:31:02,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-09 08:31:02,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:02,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:31:02,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:02,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 08:31:02,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466703593] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:02,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:02,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-09 08:31:02,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117582469] [2021-11-09 08:31:02,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:31:02,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:02,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:31:02,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:31:02,553 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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) [2021-11-09 08:31:02,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:02,600 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2021-11-09 08:31:02,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:31:02,601 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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 27 [2021-11-09 08:31:02,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:02,602 INFO L225 Difference]: With dead ends: 84 [2021-11-09 08:31:02,603 INFO L226 Difference]: Without dead ends: 78 [2021-11-09 08:31:02,603 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:31:02,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-09 08:31:02,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-11-09 08:31:02,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 71 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) [2021-11-09 08:31:02,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2021-11-09 08:31:02,624 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 27 [2021-11-09 08:31:02,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:02,625 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2021-11-09 08:31:02,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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) [2021-11-09 08:31:02,626 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2021-11-09 08:31:02,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 08:31:02,626 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:02,627 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:02,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:02,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:02,854 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:02,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:02,854 INFO L85 PathProgramCache]: Analyzing trace with hash -822645520, now seen corresponding path program 13 times [2021-11-09 08:31:02,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:02,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294811254] [2021-11-09 08:31:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:02,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:31:03,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:03,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294811254] [2021-11-09 08:31:03,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294811254] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:03,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533706647] [2021-11-09 08:31:03,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:31:03,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:03,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:03,162 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:03,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 08:31:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:03,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 08:31:03,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:31:03,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533706647] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:03,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:03,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2021-11-09 08:31:03,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79010081] [2021-11-09 08:31:03,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 08:31:03,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:03,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 08:31:03,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-11-09 08:31:03,912 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:04,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:04,640 INFO L93 Difference]: Finished difference Result 149 states and 168 transitions. [2021-11-09 08:31:04,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 08:31:04,641 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-09 08:31:04,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:04,642 INFO L225 Difference]: With dead ends: 149 [2021-11-09 08:31:04,642 INFO L226 Difference]: Without dead ends: 140 [2021-11-09 08:31:04,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=213, Invalid=1593, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 08:31:04,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-09 08:31:04,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 81. [2021-11-09 08:31:04,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.2) internal successors, (96), 80 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) [2021-11-09 08:31:04,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2021-11-09 08:31:04,662 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 28 [2021-11-09 08:31:04,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:04,662 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2021-11-09 08:31:04,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:04,663 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2021-11-09 08:31:04,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 08:31:04,663 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:04,664 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:04,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:04,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 08:31:04,880 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:04,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:04,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1124024368, now seen corresponding path program 14 times [2021-11-09 08:31:04,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:04,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875971918] [2021-11-09 08:31:04,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:04,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:31:05,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:05,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875971918] [2021-11-09 08:31:05,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875971918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:05,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124579866] [2021-11-09 08:31:05,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:31:05,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:05,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:05,192 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:05,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 08:31:05,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:31:05,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:05,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 08:31:05,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:31:05,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124579866] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:05,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:05,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2021-11-09 08:31:05,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078084944] [2021-11-09 08:31:05,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 08:31:05,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:05,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 08:31:05,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:31:05,920 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 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) [2021-11-09 08:31:06,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:06,477 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2021-11-09 08:31:06,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:31:06,481 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 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 28 [2021-11-09 08:31:06,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:06,482 INFO L225 Difference]: With dead ends: 118 [2021-11-09 08:31:06,482 INFO L226 Difference]: Without dead ends: 112 [2021-11-09 08:31:06,483 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 08:31:06,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-09 08:31:06,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2021-11-09 08:31:06,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.2) internal successors, (108), 90 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) [2021-11-09 08:31:06,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2021-11-09 08:31:06,504 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 28 [2021-11-09 08:31:06,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:06,504 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2021-11-09 08:31:06,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 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) [2021-11-09 08:31:06,505 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2021-11-09 08:31:06,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 08:31:06,505 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:06,505 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:06,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:06,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 08:31:06,722 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:06,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:06,723 INFO L85 PathProgramCache]: Analyzing trace with hash 930430102, now seen corresponding path program 15 times [2021-11-09 08:31:06,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:06,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766295351] [2021-11-09 08:31:06,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:06,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:31:06,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:06,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766295351] [2021-11-09 08:31:06,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766295351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:06,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094796577] [2021-11-09 08:31:06,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:31:06,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:06,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:06,908 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:06,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 08:31:07,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:31:07,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:07,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 08:31:07,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:07,633 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:31:07,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094796577] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:07,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:07,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-09 08:31:07,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34218790] [2021-11-09 08:31:07,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:31:07,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:07,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:31:07,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:31:07,636 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:08,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:08,261 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2021-11-09 08:31:08,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 08:31:08,262 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 08:31:08,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:08,264 INFO L225 Difference]: With dead ends: 155 [2021-11-09 08:31:08,264 INFO L226 Difference]: Without dead ends: 129 [2021-11-09 08:31:08,265 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=995, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 08:31:08,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-09 08:31:08,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 94. [2021-11-09 08:31:08,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.2150537634408602) internal successors, (113), 93 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:08,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2021-11-09 08:31:08,307 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 29 [2021-11-09 08:31:08,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:08,308 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2021-11-09 08:31:08,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:08,309 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2021-11-09 08:31:08,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 08:31:08,309 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:08,309 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:08,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:08,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 08:31:08,526 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:08,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:08,526 INFO L85 PathProgramCache]: Analyzing trace with hash 138479735, now seen corresponding path program 16 times [2021-11-09 08:31:08,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:08,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595074677] [2021-11-09 08:31:08,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:08,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:31:08,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:08,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595074677] [2021-11-09 08:31:08,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595074677] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:08,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286517056] [2021-11-09 08:31:08,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:31:08,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:08,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:08,681 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:08,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 08:31:08,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:31:08,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:08,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 08:31:08,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:31:09,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286517056] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:09,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:09,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-11-09 08:31:09,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051074801] [2021-11-09 08:31:09,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 08:31:09,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:09,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 08:31:09,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:31:09,382 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 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) [2021-11-09 08:31:09,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:09,800 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2021-11-09 08:31:09,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:31:09,801 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 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 29 [2021-11-09 08:31:09,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:09,802 INFO L225 Difference]: With dead ends: 144 [2021-11-09 08:31:09,802 INFO L226 Difference]: Without dead ends: 131 [2021-11-09 08:31:09,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-11-09 08:31:09,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-09 08:31:09,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2021-11-09 08:31:09,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 95 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) [2021-11-09 08:31:09,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 115 transitions. [2021-11-09 08:31:09,832 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 115 transitions. Word has length 29 [2021-11-09 08:31:09,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:09,832 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 115 transitions. [2021-11-09 08:31:09,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 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) [2021-11-09 08:31:09,833 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 115 transitions. [2021-11-09 08:31:09,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 08:31:09,834 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:09,834 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:09,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:10,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 08:31:10,050 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:10,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:10,051 INFO L85 PathProgramCache]: Analyzing trace with hash 2086280437, now seen corresponding path program 17 times [2021-11-09 08:31:10,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:10,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13663445] [2021-11-09 08:31:10,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:10,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:10,118 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 08:31:10,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:10,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13663445] [2021-11-09 08:31:10,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13663445] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:10,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120818592] [2021-11-09 08:31:10,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:31:10,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:10,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:10,126 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:10,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 08:31:10,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-09 08:31:10,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:10,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:31:10,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:10,645 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 08:31:10,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120818592] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:10,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:10,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-11-09 08:31:10,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403326528] [2021-11-09 08:31:10,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:31:10,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:10,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:31:10,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:31:10,648 INFO L87 Difference]: Start difference. First operand 96 states and 115 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:10,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:10,743 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2021-11-09 08:31:10,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 08:31:10,750 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 08:31:10,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:10,751 INFO L225 Difference]: With dead ends: 139 [2021-11-09 08:31:10,751 INFO L226 Difference]: Without dead ends: 126 [2021-11-09 08:31:10,752 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:31:10,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-09 08:31:10,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2021-11-09 08:31:10,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.2252252252252251) internal successors, (136), 111 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:10,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 136 transitions. [2021-11-09 08:31:10,778 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 136 transitions. Word has length 29 [2021-11-09 08:31:10,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:10,779 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 136 transitions. [2021-11-09 08:31:10,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:10,779 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 136 transitions. [2021-11-09 08:31:10,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 08:31:10,780 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:10,780 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:10,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:11,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 08:31:11,003 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:11,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:11,003 INFO L85 PathProgramCache]: Analyzing trace with hash -397298668, now seen corresponding path program 18 times [2021-11-09 08:31:11,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:11,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132677230] [2021-11-09 08:31:11,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:11,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 08:31:11,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:11,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132677230] [2021-11-09 08:31:11,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132677230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:11,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705375313] [2021-11-09 08:31:11,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:31:11,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:11,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:11,063 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:11,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 08:31:11,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-09 08:31:11,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:11,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:31:11,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 08:31:11,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705375313] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:11,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:11,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-11-09 08:31:11,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994223548] [2021-11-09 08:31:11,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:31:11,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:11,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:31:11,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:31:11,525 INFO L87 Difference]: Start difference. First operand 112 states and 136 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:11,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:11,651 INFO L93 Difference]: Finished difference Result 262 states and 317 transitions. [2021-11-09 08:31:11,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 08:31:11,652 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 08:31:11,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:11,653 INFO L225 Difference]: With dead ends: 262 [2021-11-09 08:31:11,654 INFO L226 Difference]: Without dead ends: 202 [2021-11-09 08:31:11,654 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:31:11,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-09 08:31:11,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 134. [2021-11-09 08:31:11,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.2255639097744362) internal successors, (163), 133 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:11,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 163 transitions. [2021-11-09 08:31:11,687 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 163 transitions. Word has length 29 [2021-11-09 08:31:11,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:11,687 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 163 transitions. [2021-11-09 08:31:11,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:11,688 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 163 transitions. [2021-11-09 08:31:11,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 08:31:11,688 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:11,689 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:11,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:11,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 08:31:11,911 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:11,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:11,912 INFO L85 PathProgramCache]: Analyzing trace with hash 660541935, now seen corresponding path program 19 times [2021-11-09 08:31:11,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:11,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215030849] [2021-11-09 08:31:11,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:11,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:11,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:31:12,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:12,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215030849] [2021-11-09 08:31:12,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215030849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:12,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197476524] [2021-11-09 08:31:12,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:31:12,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:12,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:12,306 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:12,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 08:31:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:12,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-09 08:31:12,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:31:13,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197476524] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:13,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:13,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 29 [2021-11-09 08:31:13,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822397731] [2021-11-09 08:31:13,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 08:31:13,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:13,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 08:31:13,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-11-09 08:31:13,266 INFO L87 Difference]: Start difference. First operand 134 states and 163 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 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) [2021-11-09 08:31:14,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:14,131 INFO L93 Difference]: Finished difference Result 258 states and 295 transitions. [2021-11-09 08:31:14,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 08:31:14,132 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 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 30 [2021-11-09 08:31:14,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:14,134 INFO L225 Difference]: With dead ends: 258 [2021-11-09 08:31:14,134 INFO L226 Difference]: Without dead ends: 249 [2021-11-09 08:31:14,137 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=232, Invalid=2024, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 08:31:14,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-09 08:31:14,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 143. [2021-11-09 08:31:14,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.2183098591549295) internal successors, (173), 142 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:14,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2021-11-09 08:31:14,193 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 30 [2021-11-09 08:31:14,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:14,194 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2021-11-09 08:31:14,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 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) [2021-11-09 08:31:14,195 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2021-11-09 08:31:14,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 08:31:14,196 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:14,196 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:14,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:14,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 08:31:14,410 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:14,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:14,410 INFO L85 PathProgramCache]: Analyzing trace with hash 283195298, now seen corresponding path program 20 times [2021-11-09 08:31:14,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:14,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716837009] [2021-11-09 08:31:14,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:14,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:14,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 08:31:14,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:14,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716837009] [2021-11-09 08:31:14,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716837009] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:14,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867172082] [2021-11-09 08:31:14,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:31:14,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:14,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:14,536 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:14,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 08:31:14,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:31:14,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:14,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 08:31:14,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:31:15,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867172082] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:15,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:15,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-11-09 08:31:15,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579385129] [2021-11-09 08:31:15,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 08:31:15,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:15,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 08:31:15,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:31:15,223 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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) [2021-11-09 08:31:15,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:15,521 INFO L93 Difference]: Finished difference Result 217 states and 254 transitions. [2021-11-09 08:31:15,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:31:15,522 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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 30 [2021-11-09 08:31:15,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:15,523 INFO L225 Difference]: With dead ends: 217 [2021-11-09 08:31:15,523 INFO L226 Difference]: Without dead ends: 181 [2021-11-09 08:31:15,525 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-11-09 08:31:15,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-09 08:31:15,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 154. [2021-11-09 08:31:15,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.196078431372549) internal successors, (183), 153 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:15,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 183 transitions. [2021-11-09 08:31:15,565 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 183 transitions. Word has length 30 [2021-11-09 08:31:15,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:15,565 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 183 transitions. [2021-11-09 08:31:15,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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) [2021-11-09 08:31:15,566 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 183 transitions. [2021-11-09 08:31:15,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 08:31:15,567 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:15,567 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:15,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:15,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:15,780 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:15,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:15,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1226887537, now seen corresponding path program 21 times [2021-11-09 08:31:15,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:15,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360533067] [2021-11-09 08:31:15,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:15,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:31:16,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:16,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360533067] [2021-11-09 08:31:16,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360533067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:16,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353861244] [2021-11-09 08:31:16,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:31:16,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:16,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:16,094 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:16,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 08:31:16,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 08:31:16,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:16,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 08:31:16,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:16,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:31:16,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353861244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:16,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:16,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-11-09 08:31:16,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510669164] [2021-11-09 08:31:16,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 08:31:16,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:16,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 08:31:16,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-11-09 08:31:16,957 INFO L87 Difference]: Start difference. First operand 154 states and 183 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:17,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:17,649 INFO L93 Difference]: Finished difference Result 226 states and 258 transitions. [2021-11-09 08:31:17,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 08:31:17,650 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-09 08:31:17,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:17,651 INFO L225 Difference]: With dead ends: 226 [2021-11-09 08:31:17,652 INFO L226 Difference]: Without dead ends: 204 [2021-11-09 08:31:17,653 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 08:31:17,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-09 08:31:17,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 153. [2021-11-09 08:31:17,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.2039473684210527) internal successors, (183), 152 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:17,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 183 transitions. [2021-11-09 08:31:17,695 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 183 transitions. Word has length 30 [2021-11-09 08:31:17,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:17,695 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 183 transitions. [2021-11-09 08:31:17,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:17,696 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 183 transitions. [2021-11-09 08:31:17,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 08:31:17,697 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:17,697 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:17,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:17,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:17,926 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:17,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:17,926 INFO L85 PathProgramCache]: Analyzing trace with hash 628770462, now seen corresponding path program 22 times [2021-11-09 08:31:17,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:17,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321015631] [2021-11-09 08:31:17,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:17,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 08:31:18,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:18,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321015631] [2021-11-09 08:31:18,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321015631] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:18,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582542567] [2021-11-09 08:31:18,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:31:18,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:18,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:18,082 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:18,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 08:31:18,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:31:18,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:18,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 08:31:18,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:18,790 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:31:18,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582542567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:18,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:18,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-11-09 08:31:18,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232868527] [2021-11-09 08:31:18,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 08:31:18,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:18,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 08:31:18,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-11-09 08:31:18,792 INFO L87 Difference]: Start difference. First operand 153 states and 183 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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) [2021-11-09 08:31:19,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:19,012 INFO L93 Difference]: Finished difference Result 186 states and 214 transitions. [2021-11-09 08:31:19,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:31:19,013 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 30 [2021-11-09 08:31:19,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:19,015 INFO L225 Difference]: With dead ends: 186 [2021-11-09 08:31:19,015 INFO L226 Difference]: Without dead ends: 167 [2021-11-09 08:31:19,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:31:19,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-09 08:31:19,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 153. [2021-11-09 08:31:19,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.1776315789473684) internal successors, (179), 152 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:19,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 179 transitions. [2021-11-09 08:31:19,059 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 179 transitions. Word has length 30 [2021-11-09 08:31:19,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:19,059 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 179 transitions. [2021-11-09 08:31:19,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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) [2021-11-09 08:31:19,060 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 179 transitions. [2021-11-09 08:31:19,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 08:31:19,061 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:19,061 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:19,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:19,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-09 08:31:19,278 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:19,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:19,278 INFO L85 PathProgramCache]: Analyzing trace with hash -335399049, now seen corresponding path program 23 times [2021-11-09 08:31:19,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:19,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096983997] [2021-11-09 08:31:19,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:19,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:19,490 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:31:19,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:19,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096983997] [2021-11-09 08:31:19,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096983997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:19,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246477580] [2021-11-09 08:31:19,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:31:19,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:19,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:19,493 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:19,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 08:31:19,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 08:31:19,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:19,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 08:31:19,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:31:20,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246477580] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:20,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:20,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-09 08:31:20,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300425038] [2021-11-09 08:31:20,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 08:31:20,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:20,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 08:31:20,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-11-09 08:31:20,460 INFO L87 Difference]: Start difference. First operand 153 states and 179 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:21,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:21,588 INFO L93 Difference]: Finished difference Result 263 states and 298 transitions. [2021-11-09 08:31:21,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 08:31:21,588 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-09 08:31:21,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:21,590 INFO L225 Difference]: With dead ends: 263 [2021-11-09 08:31:21,590 INFO L226 Difference]: Without dead ends: 233 [2021-11-09 08:31:21,591 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=455, Invalid=1801, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 08:31:21,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-09 08:31:21,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 168. [2021-11-09 08:31:21,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.1796407185628743) internal successors, (197), 167 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:21,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 197 transitions. [2021-11-09 08:31:21,641 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 197 transitions. Word has length 31 [2021-11-09 08:31:21,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:21,642 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 197 transitions. [2021-11-09 08:31:21,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:21,642 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 197 transitions. [2021-11-09 08:31:21,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 08:31:21,643 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:21,643 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:21,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:21,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-09 08:31:21,846 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:21,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:21,847 INFO L85 PathProgramCache]: Analyzing trace with hash 883943350, now seen corresponding path program 24 times [2021-11-09 08:31:21,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:21,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360555486] [2021-11-09 08:31:21,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:21,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:31:22,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:22,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360555486] [2021-11-09 08:31:22,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360555486] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:22,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699935189] [2021-11-09 08:31:22,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:31:22,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:22,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:22,078 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:22,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 08:31:22,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-09 08:31:22,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:22,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 08:31:22,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:31:23,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699935189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:23,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:23,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-11-09 08:31:23,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819709332] [2021-11-09 08:31:23,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 08:31:23,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:23,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 08:31:23,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:31:23,118 INFO L87 Difference]: Start difference. First operand 168 states and 197 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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) [2021-11-09 08:31:23,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:23,734 INFO L93 Difference]: Finished difference Result 251 states and 283 transitions. [2021-11-09 08:31:23,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:31:23,735 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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 31 [2021-11-09 08:31:23,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:23,736 INFO L225 Difference]: With dead ends: 251 [2021-11-09 08:31:23,736 INFO L226 Difference]: Without dead ends: 236 [2021-11-09 08:31:23,737 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-11-09 08:31:23,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-09 08:31:23,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 171. [2021-11-09 08:31:23,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1764705882352942) internal successors, (200), 170 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:23,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 200 transitions. [2021-11-09 08:31:23,789 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 200 transitions. Word has length 31 [2021-11-09 08:31:23,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:23,789 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 200 transitions. [2021-11-09 08:31:23,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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) [2021-11-09 08:31:23,790 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 200 transitions. [2021-11-09 08:31:23,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 08:31:23,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:23,791 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:23,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:24,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:24,006 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:24,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:24,007 INFO L85 PathProgramCache]: Analyzing trace with hash 2026567256, now seen corresponding path program 25 times [2021-11-09 08:31:24,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:24,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626701481] [2021-11-09 08:31:24,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:24,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-09 08:31:24,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:24,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626701481] [2021-11-09 08:31:24,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626701481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:24,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414614552] [2021-11-09 08:31:24,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:31:24,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:24,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:24,098 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:24,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 08:31:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:24,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 08:31:24,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-09 08:31:24,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414614552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:24,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:24,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-09 08:31:24,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783579324] [2021-11-09 08:31:24,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:31:24,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:24,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:31:24,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:31:24,715 INFO L87 Difference]: Start difference. First operand 171 states and 200 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:24,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:24,818 INFO L93 Difference]: Finished difference Result 227 states and 261 transitions. [2021-11-09 08:31:24,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:31:24,819 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-09 08:31:24,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:24,820 INFO L225 Difference]: With dead ends: 227 [2021-11-09 08:31:24,820 INFO L226 Difference]: Without dead ends: 171 [2021-11-09 08:31:24,821 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:31:24,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-09 08:31:24,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 157. [2021-11-09 08:31:24,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.1666666666666667) internal successors, (182), 156 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:24,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 182 transitions. [2021-11-09 08:31:24,868 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 182 transitions. Word has length 31 [2021-11-09 08:31:24,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:24,869 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 182 transitions. [2021-11-09 08:31:24,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:24,869 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 182 transitions. [2021-11-09 08:31:24,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 08:31:24,870 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:24,871 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:24,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:25,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:25,094 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:25,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:25,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1679203531, now seen corresponding path program 26 times [2021-11-09 08:31:25,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:25,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117542694] [2021-11-09 08:31:25,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:25,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-09 08:31:25,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:25,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117542694] [2021-11-09 08:31:25,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117542694] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:25,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656929114] [2021-11-09 08:31:25,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:31:25,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:25,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:25,185 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:25,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 08:31:25,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:31:25,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:25,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 08:31:25,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-09 08:31:25,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656929114] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:25,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:25,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-09 08:31:25,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670572179] [2021-11-09 08:31:25,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:31:25,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:25,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:31:25,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:31:25,966 INFO L87 Difference]: Start difference. First operand 157 states and 182 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:26,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:26,090 INFO L93 Difference]: Finished difference Result 178 states and 201 transitions. [2021-11-09 08:31:26,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:31:26,090 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-09 08:31:26,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:26,092 INFO L225 Difference]: With dead ends: 178 [2021-11-09 08:31:26,092 INFO L226 Difference]: Without dead ends: 172 [2021-11-09 08:31:26,093 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:31:26,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-09 08:31:26,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 158. [2021-11-09 08:31:26,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.1656050955414012) internal successors, (183), 157 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:26,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2021-11-09 08:31:26,139 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 31 [2021-11-09 08:31:26,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:26,140 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2021-11-09 08:31:26,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:26,140 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2021-11-09 08:31:26,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 08:31:26,141 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:26,141 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:26,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:26,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:26,358 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:26,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:26,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1999889776, now seen corresponding path program 27 times [2021-11-09 08:31:26,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:26,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012311249] [2021-11-09 08:31:26,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:26,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:31:26,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:26,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012311249] [2021-11-09 08:31:26,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012311249] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:26,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129535862] [2021-11-09 08:31:26,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:31:26,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:26,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:26,818 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:26,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 08:31:27,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 08:31:27,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:27,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 08:31:27,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:31:27,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129535862] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:27,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:27,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 32 [2021-11-09 08:31:27,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316338165] [2021-11-09 08:31:27,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 08:31:27,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:27,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 08:31:27,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2021-11-09 08:31:27,882 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand has 32 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:29,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:29,141 INFO L93 Difference]: Finished difference Result 305 states and 337 transitions. [2021-11-09 08:31:29,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 08:31:29,142 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-09 08:31:29,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:29,144 INFO L225 Difference]: With dead ends: 305 [2021-11-09 08:31:29,145 INFO L226 Difference]: Without dead ends: 296 [2021-11-09 08:31:29,146 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=251, Invalid=2505, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 08:31:29,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-09 08:31:29,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 167. [2021-11-09 08:31:29,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1626506024096386) internal successors, (193), 166 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:29,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 193 transitions. [2021-11-09 08:31:29,198 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 193 transitions. Word has length 32 [2021-11-09 08:31:29,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:29,198 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 193 transitions. [2021-11-09 08:31:29,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:29,199 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 193 transitions. [2021-11-09 08:31:29,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 08:31:29,199 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:29,200 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:29,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:29,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:29,406 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:29,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:29,407 INFO L85 PathProgramCache]: Analyzing trace with hash -120192688, now seen corresponding path program 28 times [2021-11-09 08:31:29,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:29,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629284379] [2021-11-09 08:31:29,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:29,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:31:29,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:29,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629284379] [2021-11-09 08:31:29,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629284379] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:29,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673288744] [2021-11-09 08:31:29,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:31:29,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:29,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:29,822 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:29,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 08:31:30,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:31:30,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:30,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-09 08:31:30,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:31:30,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673288744] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:30,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:30,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 30 [2021-11-09 08:31:30,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696208927] [2021-11-09 08:31:30,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 08:31:30,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:30,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 08:31:30,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-11-09 08:31:30,910 INFO L87 Difference]: Start difference. First operand 167 states and 193 transitions. Second operand has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 30 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) [2021-11-09 08:31:31,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:31,782 INFO L93 Difference]: Finished difference Result 223 states and 248 transitions. [2021-11-09 08:31:31,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 08:31:31,783 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 30 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 32 [2021-11-09 08:31:31,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:31,784 INFO L225 Difference]: With dead ends: 223 [2021-11-09 08:31:31,784 INFO L226 Difference]: Without dead ends: 200 [2021-11-09 08:31:31,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=228, Invalid=2028, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 08:31:31,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-09 08:31:31,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 158. [2021-11-09 08:31:31,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.1656050955414012) internal successors, (183), 157 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:31,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2021-11-09 08:31:31,840 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 32 [2021-11-09 08:31:31,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:31,840 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2021-11-09 08:31:31,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 30 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) [2021-11-09 08:31:31,841 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2021-11-09 08:31:31,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 08:31:31,841 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:31,842 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:31,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:32,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-09 08:31:32,070 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:32,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:32,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1085561488, now seen corresponding path program 29 times [2021-11-09 08:31:32,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:32,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923257999] [2021-11-09 08:31:32,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:32,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:32,346 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:31:32,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:32,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923257999] [2021-11-09 08:31:32,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923257999] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:32,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868100729] [2021-11-09 08:31:32,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:31:32,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:32,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:32,348 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:32,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 08:31:32,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-09 08:31:32,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:32,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 08:31:32,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:33,460 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:31:33,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868100729] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:33,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:33,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-11-09 08:31:33,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389256361] [2021-11-09 08:31:33,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 08:31:33,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:33,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 08:31:33,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-11-09 08:31:33,463 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2021-11-09 08:31:34,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:34,142 INFO L93 Difference]: Finished difference Result 198 states and 225 transitions. [2021-11-09 08:31:34,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 08:31:34,143 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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 32 [2021-11-09 08:31:34,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:34,144 INFO L225 Difference]: With dead ends: 198 [2021-11-09 08:31:34,145 INFO L226 Difference]: Without dead ends: 192 [2021-11-09 08:31:34,146 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=222, Invalid=1670, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 08:31:34,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-09 08:31:34,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 169. [2021-11-09 08:31:34,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.1666666666666667) internal successors, (196), 168 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:34,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 196 transitions. [2021-11-09 08:31:34,199 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 196 transitions. Word has length 32 [2021-11-09 08:31:34,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:34,199 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 196 transitions. [2021-11-09 08:31:34,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2021-11-09 08:31:34,200 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 196 transitions. [2021-11-09 08:31:34,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 08:31:34,200 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:34,201 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:34,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:34,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 08:31:34,414 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:34,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:34,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1204403466, now seen corresponding path program 30 times [2021-11-09 08:31:34,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:34,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779935568] [2021-11-09 08:31:34,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:34,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:34,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:31:34,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:34,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779935568] [2021-11-09 08:31:34,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779935568] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:34,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319496483] [2021-11-09 08:31:34,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:31:34,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:34,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:34,678 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:34,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 08:31:35,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-09 08:31:35,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:35,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 08:31:35,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:31:35,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319496483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:35,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:35,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-11-09 08:31:35,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557516224] [2021-11-09 08:31:35,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 08:31:35,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:35,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 08:31:35,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2021-11-09 08:31:35,851 INFO L87 Difference]: Start difference. First operand 169 states and 196 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:37,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:37,407 INFO L93 Difference]: Finished difference Result 299 states and 335 transitions. [2021-11-09 08:31:37,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 08:31:37,408 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-09 08:31:37,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:37,410 INFO L225 Difference]: With dead ends: 299 [2021-11-09 08:31:37,410 INFO L226 Difference]: Without dead ends: 267 [2021-11-09 08:31:37,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=716, Invalid=2944, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 08:31:37,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-09 08:31:37,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 185. [2021-11-09 08:31:37,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.1684782608695652) internal successors, (215), 184 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 215 transitions. [2021-11-09 08:31:37,481 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 215 transitions. Word has length 33 [2021-11-09 08:31:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:37,481 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 215 transitions. [2021-11-09 08:31:37,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:37,482 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 215 transitions. [2021-11-09 08:31:37,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 08:31:37,483 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:37,483 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:37,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:37,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 08:31:37,698 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:37,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:37,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2059494761, now seen corresponding path program 31 times [2021-11-09 08:31:37,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:37,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34206505] [2021-11-09 08:31:37,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:37,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:31:37,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:37,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34206505] [2021-11-09 08:31:37,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34206505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:37,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265992090] [2021-11-09 08:31:37,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:31:37,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:37,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:37,935 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:37,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 08:31:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:38,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 08:31:38,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:31:39,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265992090] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:39,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:39,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-11-09 08:31:39,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906173441] [2021-11-09 08:31:39,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 08:31:39,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:39,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 08:31:39,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-11-09 08:31:39,110 INFO L87 Difference]: Start difference. First operand 185 states and 215 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2021-11-09 08:31:39,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:39,854 INFO L93 Difference]: Finished difference Result 286 states and 319 transitions. [2021-11-09 08:31:39,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 08:31:39,855 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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 33 [2021-11-09 08:31:39,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:39,856 INFO L225 Difference]: With dead ends: 286 [2021-11-09 08:31:39,856 INFO L226 Difference]: Without dead ends: 270 [2021-11-09 08:31:39,857 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 08:31:39,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-09 08:31:39,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 188. [2021-11-09 08:31:39,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.1657754010695187) internal successors, (218), 187 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) [2021-11-09 08:31:39,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 218 transitions. [2021-11-09 08:31:39,902 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 218 transitions. Word has length 33 [2021-11-09 08:31:39,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:39,902 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 218 transitions. [2021-11-09 08:31:39,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2021-11-09 08:31:39,903 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 218 transitions. [2021-11-09 08:31:39,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 08:31:39,904 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:39,904 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:39,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:40,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:40,130 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:40,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:40,130 INFO L85 PathProgramCache]: Analyzing trace with hash 893931157, now seen corresponding path program 32 times [2021-11-09 08:31:40,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:40,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546652688] [2021-11-09 08:31:40,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:40,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-09 08:31:40,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:40,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546652688] [2021-11-09 08:31:40,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546652688] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:40,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099908156] [2021-11-09 08:31:40,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:31:40,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:40,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:40,254 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:40,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 08:31:40,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:31:40,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:40,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 08:31:40,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-09 08:31:41,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099908156] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:41,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:41,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-11-09 08:31:41,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125236494] [2021-11-09 08:31:41,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 08:31:41,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:41,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 08:31:41,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:31:41,045 INFO L87 Difference]: Start difference. First operand 188 states and 218 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) [2021-11-09 08:31:41,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:41,224 INFO L93 Difference]: Finished difference Result 247 states and 283 transitions. [2021-11-09 08:31:41,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 08:31:41,225 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 33 [2021-11-09 08:31:41,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:41,226 INFO L225 Difference]: With dead ends: 247 [2021-11-09 08:31:41,226 INFO L226 Difference]: Without dead ends: 233 [2021-11-09 08:31:41,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:31:41,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-09 08:31:41,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 210. [2021-11-09 08:31:41,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.1818181818181819) internal successors, (247), 209 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:41,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 247 transitions. [2021-11-09 08:31:41,292 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 247 transitions. Word has length 33 [2021-11-09 08:31:41,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:41,292 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 247 transitions. [2021-11-09 08:31:41,293 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) [2021-11-09 08:31:41,293 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 247 transitions. [2021-11-09 08:31:41,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 08:31:41,294 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:41,294 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:41,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:41,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-09 08:31:41,510 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:41,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:41,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1979153752, now seen corresponding path program 33 times [2021-11-09 08:31:41,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:41,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508102473] [2021-11-09 08:31:41,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:41,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-09 08:31:41,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:41,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508102473] [2021-11-09 08:31:41,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508102473] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:41,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717791251] [2021-11-09 08:31:41,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:31:41,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:41,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:41,605 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:41,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 08:31:42,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:31:42,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:42,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 08:31:42,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:42,631 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-09 08:31:42,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717791251] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:42,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:42,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-11-09 08:31:42,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372404154] [2021-11-09 08:31:42,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 08:31:42,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:42,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 08:31:42,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:31:42,635 INFO L87 Difference]: Start difference. First operand 210 states and 247 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) [2021-11-09 08:31:42,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:42,916 INFO L93 Difference]: Finished difference Result 443 states and 524 transitions. [2021-11-09 08:31:42,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 08:31:42,917 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 33 [2021-11-09 08:31:42,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:42,920 INFO L225 Difference]: With dead ends: 443 [2021-11-09 08:31:42,920 INFO L226 Difference]: Without dead ends: 353 [2021-11-09 08:31:42,922 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:31:42,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-09 08:31:43,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 248. [2021-11-09 08:31:43,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.1821862348178138) internal successors, (292), 247 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:43,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 292 transitions. [2021-11-09 08:31:43,007 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 292 transitions. Word has length 33 [2021-11-09 08:31:43,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:43,010 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 292 transitions. [2021-11-09 08:31:43,010 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) [2021-11-09 08:31:43,011 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 292 transitions. [2021-11-09 08:31:43,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 08:31:43,012 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:43,012 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:43,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:43,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:43,226 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:43,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:43,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1242809295, now seen corresponding path program 34 times [2021-11-09 08:31:43,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:43,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061204465] [2021-11-09 08:31:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:43,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:31:43,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:43,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061204465] [2021-11-09 08:31:43,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061204465] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:43,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023167987] [2021-11-09 08:31:43,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:31:43,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:43,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:43,739 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:43,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 08:31:44,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:31:44,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:44,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 08:31:44,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:31:45,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023167987] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:45,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:45,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 35 [2021-11-09 08:31:45,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432430765] [2021-11-09 08:31:45,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 08:31:45,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:45,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 08:31:45,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1108, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 08:31:45,190 INFO L87 Difference]: Start difference. First operand 248 states and 292 transitions. Second operand has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 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) [2021-11-09 08:31:46,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:46,696 INFO L93 Difference]: Finished difference Result 464 states and 518 transitions. [2021-11-09 08:31:46,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 08:31:46,697 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 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 34 [2021-11-09 08:31:46,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:46,699 INFO L225 Difference]: With dead ends: 464 [2021-11-09 08:31:46,699 INFO L226 Difference]: Without dead ends: 455 [2021-11-09 08:31:46,701 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=270, Invalid=3036, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 08:31:46,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-11-09 08:31:46,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 257. [2021-11-09 08:31:46,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.1796875) internal successors, (302), 256 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:46,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 302 transitions. [2021-11-09 08:31:46,770 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 302 transitions. Word has length 34 [2021-11-09 08:31:46,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:46,770 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 302 transitions. [2021-11-09 08:31:46,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 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) [2021-11-09 08:31:46,771 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 302 transitions. [2021-11-09 08:31:46,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 08:31:46,771 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:46,771 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:46,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:46,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:46,972 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:46,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:46,973 INFO L85 PathProgramCache]: Analyzing trace with hash 489303023, now seen corresponding path program 35 times [2021-11-09 08:31:46,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:46,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669722561] [2021-11-09 08:31:46,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:46,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:31:47,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:47,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669722561] [2021-11-09 08:31:47,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669722561] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:47,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236300043] [2021-11-09 08:31:47,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:31:47,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:47,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:47,422 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:47,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 08:31:48,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-09 08:31:48,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:48,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 08:31:48,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:31:48,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236300043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:48,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:48,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 33 [2021-11-09 08:31:48,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441358001] [2021-11-09 08:31:48,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 08:31:48,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:48,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 08:31:48,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 08:31:48,832 INFO L87 Difference]: Start difference. First operand 257 states and 302 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:49,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:49,742 INFO L93 Difference]: Finished difference Result 364 states and 408 transitions. [2021-11-09 08:31:49,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 08:31:49,743 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-09 08:31:49,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:49,746 INFO L225 Difference]: With dead ends: 364 [2021-11-09 08:31:49,746 INFO L226 Difference]: Without dead ends: 340 [2021-11-09 08:31:49,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=246, Invalid=2510, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 08:31:49,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-09 08:31:49,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 248. [2021-11-09 08:31:49,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.1821862348178138) internal successors, (292), 247 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:49,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 292 transitions. [2021-11-09 08:31:49,817 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 292 transitions. Word has length 34 [2021-11-09 08:31:49,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:49,818 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 292 transitions. [2021-11-09 08:31:49,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:49,818 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 292 transitions. [2021-11-09 08:31:49,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 08:31:49,819 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:49,819 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:49,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:50,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-09 08:31:50,022 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:50,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:50,023 INFO L85 PathProgramCache]: Analyzing trace with hash -2122819938, now seen corresponding path program 36 times [2021-11-09 08:31:50,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:50,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666385205] [2021-11-09 08:31:50,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:50,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 08:31:50,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:50,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666385205] [2021-11-09 08:31:50,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666385205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:50,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667412211] [2021-11-09 08:31:50,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:31:50,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:50,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:50,225 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:50,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 08:31:50,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-09 08:31:50,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:50,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 08:31:50,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:51,288 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-09 08:31:51,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667412211] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:51,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:51,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-11-09 08:31:51,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325035092] [2021-11-09 08:31:51,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 08:31:51,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:51,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 08:31:51,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:31:51,291 INFO L87 Difference]: Start difference. First operand 248 states and 292 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 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) [2021-11-09 08:31:51,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:51,932 INFO L93 Difference]: Finished difference Result 359 states and 413 transitions. [2021-11-09 08:31:51,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 08:31:51,933 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 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) Word has length 34 [2021-11-09 08:31:51,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:51,934 INFO L225 Difference]: With dead ends: 359 [2021-11-09 08:31:51,934 INFO L226 Difference]: Without dead ends: 314 [2021-11-09 08:31:51,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=282, Invalid=1050, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 08:31:51,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-09 08:31:52,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 273. [2021-11-09 08:31:52,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.161764705882353) internal successors, (316), 272 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:52,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 316 transitions. [2021-11-09 08:31:52,006 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 316 transitions. Word has length 34 [2021-11-09 08:31:52,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:52,006 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 316 transitions. [2021-11-09 08:31:52,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 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) [2021-11-09 08:31:52,006 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 316 transitions. [2021-11-09 08:31:52,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 08:31:52,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:52,008 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:52,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:52,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:52,209 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:52,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:52,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1302431921, now seen corresponding path program 37 times [2021-11-09 08:31:52,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:52,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964039390] [2021-11-09 08:31:52,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:52,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:31:52,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:52,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964039390] [2021-11-09 08:31:52,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964039390] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:52,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372321866] [2021-11-09 08:31:52,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:31:52,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:52,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:52,626 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:52,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 08:31:53,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:53,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-09 08:31:53,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:54,286 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:31:54,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372321866] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:54,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:54,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 31 [2021-11-09 08:31:54,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105548911] [2021-11-09 08:31:54,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 08:31:54,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:54,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 08:31:54,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-11-09 08:31:54,290 INFO L87 Difference]: Start difference. First operand 273 states and 316 transitions. Second operand has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:55,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:55,164 INFO L93 Difference]: Finished difference Result 352 states and 398 transitions. [2021-11-09 08:31:55,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 08:31:55,165 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-09 08:31:55,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:55,166 INFO L225 Difference]: With dead ends: 352 [2021-11-09 08:31:55,166 INFO L226 Difference]: Without dead ends: 327 [2021-11-09 08:31:55,168 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=240, Invalid=2112, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 08:31:55,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-09 08:31:55,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 271. [2021-11-09 08:31:55,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.1666666666666667) internal successors, (315), 270 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:55,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 315 transitions. [2021-11-09 08:31:55,243 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 315 transitions. Word has length 34 [2021-11-09 08:31:55,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:55,244 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 315 transitions. [2021-11-09 08:31:55,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:55,244 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 315 transitions. [2021-11-09 08:31:55,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 08:31:55,246 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:55,246 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:55,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:55,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-09 08:31:55,462 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:55,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:55,462 INFO L85 PathProgramCache]: Analyzing trace with hash -266355998, now seen corresponding path program 38 times [2021-11-09 08:31:55,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:55,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710451930] [2021-11-09 08:31:55,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:55,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:55,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 08:31:55,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:55,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710451930] [2021-11-09 08:31:55,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710451930] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:55,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058754085] [2021-11-09 08:31:55,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:31:55,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:55,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:55,666 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:55,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-09 08:31:56,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:31:56,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:56,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 08:31:56,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:56,736 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-09 08:31:56,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058754085] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:56,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:56,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-11-09 08:31:56,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632301699] [2021-11-09 08:31:56,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 08:31:56,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:56,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 08:31:56,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:31:56,739 INFO L87 Difference]: Start difference. First operand 271 states and 315 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:57,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:57,246 INFO L93 Difference]: Finished difference Result 318 states and 359 transitions. [2021-11-09 08:31:57,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:31:57,247 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-09 08:31:57,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:57,249 INFO L225 Difference]: With dead ends: 318 [2021-11-09 08:31:57,249 INFO L226 Difference]: Without dead ends: 294 [2021-11-09 08:31:57,250 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-11-09 08:31:57,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-11-09 08:31:57,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 271. [2021-11-09 08:31:57,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.1444444444444444) internal successors, (309), 270 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:57,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 309 transitions. [2021-11-09 08:31:57,351 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 309 transitions. Word has length 34 [2021-11-09 08:31:57,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:57,351 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 309 transitions. [2021-11-09 08:31:57,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:57,352 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 309 transitions. [2021-11-09 08:31:57,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 08:31:57,353 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:57,353 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:57,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:57,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-09 08:31:57,582 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:57,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:57,582 INFO L85 PathProgramCache]: Analyzing trace with hash 535019927, now seen corresponding path program 39 times [2021-11-09 08:31:57,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:57,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572763042] [2021-11-09 08:31:57,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:57,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:57,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:31:57,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:57,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572763042] [2021-11-09 08:31:57,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572763042] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:57,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051620621] [2021-11-09 08:31:57,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:31:57,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:57,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:57,899 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:57,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-09 08:31:58,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 08:31:58,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:58,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 08:31:58,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:31:59,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051620621] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:59,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:59,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-11-09 08:31:59,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982456315] [2021-11-09 08:31:59,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 08:31:59,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:59,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 08:31:59,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2021-11-09 08:31:59,387 INFO L87 Difference]: Start difference. First operand 271 states and 309 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 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) [2021-11-09 08:32:01,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:01,667 INFO L93 Difference]: Finished difference Result 470 states and 520 transitions. [2021-11-09 08:32:01,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-09 08:32:01,667 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 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 35 [2021-11-09 08:32:01,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:01,669 INFO L225 Difference]: With dead ends: 470 [2021-11-09 08:32:01,670 INFO L226 Difference]: Without dead ends: 434 [2021-11-09 08:32:01,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1061, Invalid=4489, Unknown=0, NotChecked=0, Total=5550 [2021-11-09 08:32:01,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-11-09 08:32:01,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 301. [2021-11-09 08:32:01,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.1433333333333333) internal successors, (343), 300 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:01,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 343 transitions. [2021-11-09 08:32:01,759 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 343 transitions. Word has length 35 [2021-11-09 08:32:01,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:01,759 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 343 transitions. [2021-11-09 08:32:01,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 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) [2021-11-09 08:32:01,759 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 343 transitions. [2021-11-09 08:32:01,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 08:32:01,760 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:01,761 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:01,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-09 08:32:01,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-09 08:32:01,966 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:01,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:01,966 INFO L85 PathProgramCache]: Analyzing trace with hash -203006442, now seen corresponding path program 40 times [2021-11-09 08:32:01,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:01,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577993594] [2021-11-09 08:32:01,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:01,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:02,298 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:32:02,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:02,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577993594] [2021-11-09 08:32:02,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577993594] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:02,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414964523] [2021-11-09 08:32:02,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:32:02,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:02,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:02,301 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:02,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-09 08:32:03,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:32:03,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:03,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 08:32:03,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:32:04,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414964523] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:04,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:04,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-11-09 08:32:04,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297317939] [2021-11-09 08:32:04,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 08:32:04,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:04,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 08:32:04,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2021-11-09 08:32:04,035 INFO L87 Difference]: Start difference. First operand 301 states and 343 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 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) [2021-11-09 08:32:05,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:05,049 INFO L93 Difference]: Finished difference Result 456 states and 502 transitions. [2021-11-09 08:32:05,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:32:05,049 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 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 35 [2021-11-09 08:32:05,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:05,052 INFO L225 Difference]: With dead ends: 456 [2021-11-09 08:32:05,053 INFO L226 Difference]: Without dead ends: 438 [2021-11-09 08:32:05,053 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 08:32:05,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-11-09 08:32:05,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 305. [2021-11-09 08:32:05,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.1414473684210527) internal successors, (347), 304 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:05,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 347 transitions. [2021-11-09 08:32:05,164 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 347 transitions. Word has length 35 [2021-11-09 08:32:05,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:05,164 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 347 transitions. [2021-11-09 08:32:05,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 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) [2021-11-09 08:32:05,165 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 347 transitions. [2021-11-09 08:32:05,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 08:32:05,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:05,166 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:05,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:05,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-09 08:32:05,373 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:05,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:05,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1280821844, now seen corresponding path program 41 times [2021-11-09 08:32:05,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:05,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942044660] [2021-11-09 08:32:05,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:05,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 08:32:05,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:05,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942044660] [2021-11-09 08:32:05,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942044660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:05,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573504845] [2021-11-09 08:32:05,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:32:05,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:05,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:05,498 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:05,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-09 08:32:06,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-09 08:32:06,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:06,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:32:06,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 08:32:06,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573504845] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:06,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:06,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-11-09 08:32:06,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942367860] [2021-11-09 08:32:06,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 08:32:06,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:06,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 08:32:06,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:32:06,478 INFO L87 Difference]: Start difference. First operand 305 states and 347 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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) [2021-11-09 08:32:06,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:06,680 INFO L93 Difference]: Finished difference Result 394 states and 444 transitions. [2021-11-09 08:32:06,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 08:32:06,681 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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 35 [2021-11-09 08:32:06,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:06,683 INFO L225 Difference]: With dead ends: 394 [2021-11-09 08:32:06,683 INFO L226 Difference]: Without dead ends: 314 [2021-11-09 08:32:06,684 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:32:06,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-09 08:32:06,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 291. [2021-11-09 08:32:06,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.1344827586206896) internal successors, (329), 290 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:06,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 329 transitions. [2021-11-09 08:32:06,807 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 329 transitions. Word has length 35 [2021-11-09 08:32:06,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:06,807 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 329 transitions. [2021-11-09 08:32:06,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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) [2021-11-09 08:32:06,807 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 329 transitions. [2021-11-09 08:32:06,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 08:32:06,808 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:06,809 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:06,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:07,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:07,026 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:07,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:07,026 INFO L85 PathProgramCache]: Analyzing trace with hash 365909845, now seen corresponding path program 42 times [2021-11-09 08:32:07,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:07,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411567727] [2021-11-09 08:32:07,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:07,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 08:32:07,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:07,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411567727] [2021-11-09 08:32:07,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411567727] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:07,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624244548] [2021-11-09 08:32:07,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:32:07,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:07,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:07,125 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:07,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-09 08:32:08,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-09 08:32:08,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:08,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:32:08,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:08,454 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 08:32:08,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624244548] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:08,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:08,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-11-09 08:32:08,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327925176] [2021-11-09 08:32:08,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 08:32:08,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:08,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 08:32:08,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:32:08,457 INFO L87 Difference]: Start difference. First operand 291 states and 329 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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) [2021-11-09 08:32:08,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:08,667 INFO L93 Difference]: Finished difference Result 321 states and 356 transitions. [2021-11-09 08:32:08,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 08:32:08,668 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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 35 [2021-11-09 08:32:08,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:08,669 INFO L225 Difference]: With dead ends: 321 [2021-11-09 08:32:08,669 INFO L226 Difference]: Without dead ends: 315 [2021-11-09 08:32:08,670 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:32:08,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-09 08:32:08,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 292. [2021-11-09 08:32:08,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.134020618556701) internal successors, (330), 291 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:08,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2021-11-09 08:32:08,754 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 35 [2021-11-09 08:32:08,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:08,755 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2021-11-09 08:32:08,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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) [2021-11-09 08:32:08,755 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2021-11-09 08:32:08,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 08:32:08,756 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:08,756 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:08,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-09 08:32:08,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-11-09 08:32:08,970 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:08,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:08,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1335594960, now seen corresponding path program 43 times [2021-11-09 08:32:08,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:08,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041400912] [2021-11-09 08:32:08,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:08,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:32:09,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:09,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041400912] [2021-11-09 08:32:09,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041400912] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:09,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348328774] [2021-11-09 08:32:09,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:32:09,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:09,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:09,468 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:09,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-09 08:32:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:10,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-09 08:32:10,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:10,943 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:32:10,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348328774] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:10,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:10,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 38 [2021-11-09 08:32:10,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263619308] [2021-11-09 08:32:10,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 08:32:10,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:10,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 08:32:10,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1317, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 08:32:10,946 INFO L87 Difference]: Start difference. First operand 292 states and 330 transitions. Second operand has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:12,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:12,543 INFO L93 Difference]: Finished difference Result 540 states and 587 transitions. [2021-11-09 08:32:12,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 08:32:12,543 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-09 08:32:12,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:12,547 INFO L225 Difference]: With dead ends: 540 [2021-11-09 08:32:12,547 INFO L226 Difference]: Without dead ends: 531 [2021-11-09 08:32:12,548 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=289, Invalid=3617, Unknown=0, NotChecked=0, Total=3906 [2021-11-09 08:32:12,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-09 08:32:12,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 301. [2021-11-09 08:32:12,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.1333333333333333) internal successors, (340), 300 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:12,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 340 transitions. [2021-11-09 08:32:12,669 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 340 transitions. Word has length 36 [2021-11-09 08:32:12,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:12,670 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 340 transitions. [2021-11-09 08:32:12,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:12,670 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 340 transitions. [2021-11-09 08:32:12,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 08:32:12,672 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:12,672 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:12,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:12,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:12,898 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:12,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:12,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1858622864, now seen corresponding path program 44 times [2021-11-09 08:32:12,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:12,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566733569] [2021-11-09 08:32:12,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:12,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:32:13,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:13,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566733569] [2021-11-09 08:32:13,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566733569] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:13,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395735127] [2021-11-09 08:32:13,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:32:13,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:13,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:13,426 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:13,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-09 08:32:14,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:32:14,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:14,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 08:32:14,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:32:15,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395735127] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:15,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:15,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 36 [2021-11-09 08:32:15,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779514064] [2021-11-09 08:32:15,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 08:32:15,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:15,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 08:32:15,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1172, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 08:32:15,283 INFO L87 Difference]: Start difference. First operand 301 states and 340 transitions. Second operand has 36 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 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) [2021-11-09 08:32:16,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:16,576 INFO L93 Difference]: Finished difference Result 427 states and 465 transitions. [2021-11-09 08:32:16,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 08:32:16,576 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 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 36 [2021-11-09 08:32:16,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:16,578 INFO L225 Difference]: With dead ends: 427 [2021-11-09 08:32:16,578 INFO L226 Difference]: Without dead ends: 402 [2021-11-09 08:32:16,579 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=264, Invalid=3042, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 08:32:16,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-09 08:32:16,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 292. [2021-11-09 08:32:16,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.134020618556701) internal successors, (330), 291 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:16,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2021-11-09 08:32:16,702 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 36 [2021-11-09 08:32:16,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:16,703 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2021-11-09 08:32:16,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 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) [2021-11-09 08:32:16,703 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2021-11-09 08:32:16,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 08:32:16,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:16,705 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:16,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:16,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:16,930 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:16,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:16,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1659359184, now seen corresponding path program 45 times [2021-11-09 08:32:16,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:16,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388563190] [2021-11-09 08:32:16,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:16,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:32:17,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:17,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388563190] [2021-11-09 08:32:17,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388563190] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:17,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344486736] [2021-11-09 08:32:17,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:32:17,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:17,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:17,389 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:17,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-09 08:32:18,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:32:18,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:18,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 08:32:18,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:19,079 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:32:19,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344486736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:19,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:19,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 34 [2021-11-09 08:32:19,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958929046] [2021-11-09 08:32:19,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 08:32:19,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:19,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 08:32:19,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 08:32:19,082 INFO L87 Difference]: Start difference. First operand 292 states and 330 transitions. Second operand has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 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) [2021-11-09 08:32:20,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:20,049 INFO L93 Difference]: Finished difference Result 352 states and 389 transitions. [2021-11-09 08:32:20,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 08:32:20,049 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 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 36 [2021-11-09 08:32:20,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:20,051 INFO L225 Difference]: With dead ends: 352 [2021-11-09 08:32:20,051 INFO L226 Difference]: Without dead ends: 326 [2021-11-09 08:32:20,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=258, Invalid=2604, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 08:32:20,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-11-09 08:32:20,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 281. [2021-11-09 08:32:20,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.1357142857142857) internal successors, (318), 280 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:20,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 318 transitions. [2021-11-09 08:32:20,144 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 318 transitions. Word has length 36 [2021-11-09 08:32:20,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:20,144 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 318 transitions. [2021-11-09 08:32:20,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 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) [2021-11-09 08:32:20,144 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 318 transitions. [2021-11-09 08:32:20,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 08:32:20,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:20,145 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:20,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:20,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-09 08:32:20,374 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:20,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:20,374 INFO L85 PathProgramCache]: Analyzing trace with hash 59566704, now seen corresponding path program 46 times [2021-11-09 08:32:20,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:20,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012847624] [2021-11-09 08:32:20,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:20,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 08:32:20,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:20,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012847624] [2021-11-09 08:32:20,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012847624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:20,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8068977] [2021-11-09 08:32:20,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:32:20,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:20,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:20,721 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:20,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-09 08:32:21,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:32:21,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:21,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-09 08:32:21,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:22,320 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 08:32:22,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8068977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:22,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:22,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2021-11-09 08:32:22,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237233949] [2021-11-09 08:32:22,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 08:32:22,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:22,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 08:32:22,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2021-11-09 08:32:22,323 INFO L87 Difference]: Start difference. First operand 281 states and 318 transitions. Second operand has 32 states, 32 states have (on average 1.4375) internal successors, (46), 32 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) [2021-11-09 08:32:23,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:23,076 INFO L93 Difference]: Finished difference Result 324 states and 363 transitions. [2021-11-09 08:32:23,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 08:32:23,077 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-09 08:32:23,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:23,078 INFO L225 Difference]: With dead ends: 324 [2021-11-09 08:32:23,078 INFO L226 Difference]: Without dead ends: 318 [2021-11-09 08:32:23,079 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=252, Invalid=2198, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 08:32:23,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-11-09 08:32:23,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 293. [2021-11-09 08:32:23,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.1369863013698631) internal successors, (332), 292 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:23,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 332 transitions. [2021-11-09 08:32:23,177 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 332 transitions. Word has length 36 [2021-11-09 08:32:23,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:23,177 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 332 transitions. [2021-11-09 08:32:23,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.4375) internal successors, (46), 32 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) [2021-11-09 08:32:23,178 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 332 transitions. [2021-11-09 08:32:23,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 08:32:23,179 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:23,179 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:23,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-11-09 08:32:23,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-09 08:32:23,386 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:23,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:23,386 INFO L85 PathProgramCache]: Analyzing trace with hash -2086100650, now seen corresponding path program 47 times [2021-11-09 08:32:23,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:23,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789453902] [2021-11-09 08:32:23,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:23,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:23,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:32:23,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:23,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789453902] [2021-11-09 08:32:23,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789453902] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:23,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241106314] [2021-11-09 08:32:23,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:32:23,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:23,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:23,719 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:23,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-09 08:32:24,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 08:32:24,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:24,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 08:32:24,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:25,554 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:32:25,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241106314] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:25,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:25,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2021-11-09 08:32:25,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403276251] [2021-11-09 08:32:25,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 08:32:25,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:25,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 08:32:25,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1107, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 08:32:25,557 INFO L87 Difference]: Start difference. First operand 293 states and 332 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:28,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:28,656 INFO L93 Difference]: Finished difference Result 520 states and 571 transitions. [2021-11-09 08:32:28,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-09 08:32:28,657 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 08:32:28,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:28,659 INFO L225 Difference]: With dead ends: 520 [2021-11-09 08:32:28,659 INFO L226 Difference]: Without dead ends: 482 [2021-11-09 08:32:28,660 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1504, Invalid=6506, Unknown=0, NotChecked=0, Total=8010 [2021-11-09 08:32:28,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-11-09 08:32:28,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 324. [2021-11-09 08:32:28,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.1362229102167183) internal successors, (367), 323 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:28,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 367 transitions. [2021-11-09 08:32:28,796 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 367 transitions. Word has length 37 [2021-11-09 08:32:28,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:28,797 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 367 transitions. [2021-11-09 08:32:28,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:28,797 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 367 transitions. [2021-11-09 08:32:28,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 08:32:28,798 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:28,798 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:28,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:29,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-09 08:32:29,026 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:29,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:29,027 INFO L85 PathProgramCache]: Analyzing trace with hash 804885687, now seen corresponding path program 48 times [2021-11-09 08:32:29,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:29,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302298734] [2021-11-09 08:32:29,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:29,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:29,422 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:32:29,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:29,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302298734] [2021-11-09 08:32:29,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302298734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:29,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355252624] [2021-11-09 08:32:29,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:32:29,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:29,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:29,425 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:29,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-09 08:32:30,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 08:32:30,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:30,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 08:32:30,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:31,180 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:32:31,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355252624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:31,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:31,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-11-09 08:32:31,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711007826] [2021-11-09 08:32:31,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 08:32:31,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:31,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 08:32:31,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1174, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 08:32:31,183 INFO L87 Difference]: Start difference. First operand 324 states and 367 transitions. Second operand has 36 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 36 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) [2021-11-09 08:32:32,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:32,404 INFO L93 Difference]: Finished difference Result 505 states and 552 transitions. [2021-11-09 08:32:32,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 08:32:32,404 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 36 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 37 [2021-11-09 08:32:32,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:32,407 INFO L225 Difference]: With dead ends: 505 [2021-11-09 08:32:32,407 INFO L226 Difference]: Without dead ends: 486 [2021-11-09 08:32:32,407 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=188, Invalid=1792, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 08:32:32,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-11-09 08:32:32,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 328. [2021-11-09 08:32:32,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.1345565749235473) internal successors, (371), 327 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:32,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 371 transitions. [2021-11-09 08:32:32,535 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 371 transitions. Word has length 37 [2021-11-09 08:32:32,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:32,536 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 371 transitions. [2021-11-09 08:32:32,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 36 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) [2021-11-09 08:32:32,536 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 371 transitions. [2021-11-09 08:32:32,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 08:32:32,537 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:32,537 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:32,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:32,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-09 08:32:32,742 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:32,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:32,742 INFO L85 PathProgramCache]: Analyzing trace with hash -847136075, now seen corresponding path program 49 times [2021-11-09 08:32:32,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:32,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901351159] [2021-11-09 08:32:32,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:32,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 08:32:32,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:32,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901351159] [2021-11-09 08:32:32,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901351159] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:32,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429385073] [2021-11-09 08:32:32,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:32:32,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:32,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:32,850 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:32,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-09 08:32:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:33,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 08:32:33,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 08:32:34,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429385073] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:34,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:34,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-11-09 08:32:34,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064260044] [2021-11-09 08:32:34,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 08:32:34,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:34,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 08:32:34,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:32:34,172 INFO L87 Difference]: Start difference. First operand 328 states and 371 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:34,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:34,546 INFO L93 Difference]: Finished difference Result 404 states and 454 transitions. [2021-11-09 08:32:34,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 08:32:34,546 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 08:32:34,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:34,549 INFO L225 Difference]: With dead ends: 404 [2021-11-09 08:32:34,549 INFO L226 Difference]: Without dead ends: 389 [2021-11-09 08:32:34,550 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-11-09 08:32:34,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-09 08:32:34,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 356. [2021-11-09 08:32:34,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.1492957746478873) internal successors, (408), 355 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:34,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 408 transitions. [2021-11-09 08:32:34,671 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 408 transitions. Word has length 37 [2021-11-09 08:32:34,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:34,671 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 408 transitions. [2021-11-09 08:32:34,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:34,672 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 408 transitions. [2021-11-09 08:32:34,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 08:32:34,673 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:34,673 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:34,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:34,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:34,886 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:34,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:34,886 INFO L85 PathProgramCache]: Analyzing trace with hash 855363028, now seen corresponding path program 50 times [2021-11-09 08:32:34,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:34,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298972246] [2021-11-09 08:32:34,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:34,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:35,039 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 08:32:35,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:35,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298972246] [2021-11-09 08:32:35,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298972246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:35,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753812511] [2021-11-09 08:32:35,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:32:35,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:35,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:35,041 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:35,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-09 08:32:36,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:32:36,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:36,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 08:32:36,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 08:32:36,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753812511] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:36,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:36,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-11-09 08:32:36,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610596168] [2021-11-09 08:32:36,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 08:32:36,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:36,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 08:32:36,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:32:36,382 INFO L87 Difference]: Start difference. First operand 356 states and 408 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:36,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:36,775 INFO L93 Difference]: Finished difference Result 685 states and 794 transitions. [2021-11-09 08:32:36,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 08:32:36,775 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 08:32:36,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:36,778 INFO L225 Difference]: With dead ends: 685 [2021-11-09 08:32:36,778 INFO L226 Difference]: Without dead ends: 561 [2021-11-09 08:32:36,779 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-11-09 08:32:36,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-09 08:32:36,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 414. [2021-11-09 08:32:36,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.1501210653753027) internal successors, (475), 413 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:36,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 475 transitions. [2021-11-09 08:32:36,920 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 475 transitions. Word has length 37 [2021-11-09 08:32:36,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:36,920 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 475 transitions. [2021-11-09 08:32:36,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:36,921 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 475 transitions. [2021-11-09 08:32:36,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 08:32:36,922 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:36,922 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:36,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-11-09 08:32:37,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:37,146 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:37,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:37,146 INFO L85 PathProgramCache]: Analyzing trace with hash -155710033, now seen corresponding path program 51 times [2021-11-09 08:32:37,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:37,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883369264] [2021-11-09 08:32:37,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:37,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:32:37,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:37,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883369264] [2021-11-09 08:32:37,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883369264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:37,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377211682] [2021-11-09 08:32:37,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:32:37,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:37,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:37,699 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:37,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-09 08:32:38,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 08:32:38,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:38,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-09 08:32:38,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:32:39,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377211682] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:39,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:39,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 41 [2021-11-09 08:32:39,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907277018] [2021-11-09 08:32:39,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-09 08:32:39,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:39,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-09 08:32:39,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1544, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 08:32:39,475 INFO L87 Difference]: Start difference. First operand 414 states and 475 transitions. Second operand has 41 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 41 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) [2021-11-09 08:32:41,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:41,388 INFO L93 Difference]: Finished difference Result 761 states and 834 transitions. [2021-11-09 08:32:41,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 08:32:41,388 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 41 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 38 [2021-11-09 08:32:41,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:41,392 INFO L225 Difference]: With dead ends: 761 [2021-11-09 08:32:41,392 INFO L226 Difference]: Without dead ends: 752 [2021-11-09 08:32:41,393 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=308, Invalid=4248, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 08:32:41,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-11-09 08:32:41,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 423. [2021-11-09 08:32:41,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.1492890995260663) internal successors, (485), 422 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:41,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 485 transitions. [2021-11-09 08:32:41,570 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 485 transitions. Word has length 38 [2021-11-09 08:32:41,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:41,570 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 485 transitions. [2021-11-09 08:32:41,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 41 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) [2021-11-09 08:32:41,571 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 485 transitions. [2021-11-09 08:32:41,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 08:32:41,572 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:41,572 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:41,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-11-09 08:32:41,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-11-09 08:32:41,786 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:41,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:41,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1493827249, now seen corresponding path program 52 times [2021-11-09 08:32:41,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:41,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705098216] [2021-11-09 08:32:41,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:41,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:32:42,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:42,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705098216] [2021-11-09 08:32:42,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705098216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:42,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425773203] [2021-11-09 08:32:42,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:32:42,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:42,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:42,309 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:42,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-09 08:32:43,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:32:43,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:43,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-09 08:32:43,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:32:44,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425773203] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:44,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:44,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 39 [2021-11-09 08:32:44,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216484592] [2021-11-09 08:32:44,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 08:32:44,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:44,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 08:32:44,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1387, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 08:32:44,115 INFO L87 Difference]: Start difference. First operand 423 states and 485 transitions. Second operand has 39 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:45,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:45,698 INFO L93 Difference]: Finished difference Result 623 states and 684 transitions. [2021-11-09 08:32:45,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 08:32:45,698 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-09 08:32:45,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:45,701 INFO L225 Difference]: With dead ends: 623 [2021-11-09 08:32:45,701 INFO L226 Difference]: Without dead ends: 597 [2021-11-09 08:32:45,702 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=282, Invalid=3624, Unknown=0, NotChecked=0, Total=3906 [2021-11-09 08:32:45,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-11-09 08:32:45,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 414. [2021-11-09 08:32:45,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.1501210653753027) internal successors, (475), 413 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:45,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 475 transitions. [2021-11-09 08:32:45,877 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 475 transitions. Word has length 38 [2021-11-09 08:32:45,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:45,877 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 475 transitions. [2021-11-09 08:32:45,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:45,877 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 475 transitions. [2021-11-09 08:32:45,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 08:32:45,878 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:45,879 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:45,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:46,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:46,079 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:46,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:46,080 INFO L85 PathProgramCache]: Analyzing trace with hash -375561937, now seen corresponding path program 53 times [2021-11-09 08:32:46,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:46,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505268016] [2021-11-09 08:32:46,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:46,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:46,501 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:32:46,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:46,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505268016] [2021-11-09 08:32:46,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505268016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:46,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978752021] [2021-11-09 08:32:46,502 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:32:46,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:46,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:46,503 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:46,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-09 08:32:47,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-09 08:32:47,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:47,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 08:32:47,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:32:48,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978752021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:48,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:48,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 37 [2021-11-09 08:32:48,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729703182] [2021-11-09 08:32:48,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 08:32:48,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:48,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 08:32:48,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 08:32:48,392 INFO L87 Difference]: Start difference. First operand 414 states and 475 transitions. Second operand has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:49,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:49,745 INFO L93 Difference]: Finished difference Result 530 states and 590 transitions. [2021-11-09 08:32:49,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 08:32:49,745 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-09 08:32:49,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:49,748 INFO L225 Difference]: With dead ends: 530 [2021-11-09 08:32:49,748 INFO L226 Difference]: Without dead ends: 503 [2021-11-09 08:32:49,750 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=276, Invalid=3146, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 08:32:49,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-11-09 08:32:49,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 403. [2021-11-09 08:32:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.1517412935323383) internal successors, (463), 402 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:49,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 463 transitions. [2021-11-09 08:32:49,907 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 463 transitions. Word has length 38 [2021-11-09 08:32:49,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:49,907 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 463 transitions. [2021-11-09 08:32:49,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:49,907 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 463 transitions. [2021-11-09 08:32:49,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 08:32:49,908 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:49,908 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:49,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:50,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:50,110 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:50,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:50,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1552999778, now seen corresponding path program 54 times [2021-11-09 08:32:50,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:50,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959007588] [2021-11-09 08:32:50,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:50,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:50,322 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-09 08:32:50,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:50,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959007588] [2021-11-09 08:32:50,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959007588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:50,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218213957] [2021-11-09 08:32:50,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:32:50,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:50,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:50,324 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:50,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-09 08:32:51,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-09 08:32:51,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:51,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 08:32:51,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-09 08:32:51,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218213957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:51,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:51,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-11-09 08:32:51,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403375417] [2021-11-09 08:32:51,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 08:32:51,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:51,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 08:32:51,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:32:51,874 INFO L87 Difference]: Start difference. First operand 403 states and 463 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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) [2021-11-09 08:32:53,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:53,017 INFO L93 Difference]: Finished difference Result 556 states and 629 transitions. [2021-11-09 08:32:53,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 08:32:53,017 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 38 [2021-11-09 08:32:53,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:53,020 INFO L225 Difference]: With dead ends: 556 [2021-11-09 08:32:53,020 INFO L226 Difference]: Without dead ends: 502 [2021-11-09 08:32:53,021 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=479, Invalid=1873, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 08:32:53,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-11-09 08:32:53,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 446. [2021-11-09 08:32:53,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.1348314606741574) internal successors, (505), 445 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:53,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 505 transitions. [2021-11-09 08:32:53,192 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 505 transitions. Word has length 38 [2021-11-09 08:32:53,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:53,192 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 505 transitions. [2021-11-09 08:32:53,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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) [2021-11-09 08:32:53,193 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 505 transitions. [2021-11-09 08:32:53,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 08:32:53,194 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:53,194 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:53,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-11-09 08:32:53,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-11-09 08:32:53,401 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:53,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:53,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1465831985, now seen corresponding path program 55 times [2021-11-09 08:32:53,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:53,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943863193] [2021-11-09 08:32:53,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:53,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 08:32:53,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:53,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943863193] [2021-11-09 08:32:53,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943863193] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:53,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579377390] [2021-11-09 08:32:53,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:32:53,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:53,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:53,895 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:53,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-09 08:32:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:55,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 08:32:55,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 08:32:55,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579377390] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:55,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:55,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 35 [2021-11-09 08:32:55,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788745238] [2021-11-09 08:32:55,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 08:32:55,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:55,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 08:32:55,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1097, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 08:32:55,795 INFO L87 Difference]: Start difference. First operand 446 states and 505 transitions. Second operand has 35 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:56,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:56,827 INFO L93 Difference]: Finished difference Result 532 states and 594 transitions. [2021-11-09 08:32:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 08:32:56,828 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-09 08:32:56,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:56,831 INFO L225 Difference]: With dead ends: 532 [2021-11-09 08:32:56,831 INFO L226 Difference]: Without dead ends: 504 [2021-11-09 08:32:56,831 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=270, Invalid=2700, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 08:32:56,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-11-09 08:32:57,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 443. [2021-11-09 08:32:57,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.1380090497737556) internal successors, (503), 442 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:57,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 503 transitions. [2021-11-09 08:32:57,048 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 503 transitions. Word has length 38 [2021-11-09 08:32:57,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:57,049 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 503 transitions. [2021-11-09 08:32:57,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:57,049 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 503 transitions. [2021-11-09 08:32:57,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 08:32:57,050 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:57,050 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:57,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-11-09 08:32:57,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:57,251 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:57,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:57,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1135200674, now seen corresponding path program 56 times [2021-11-09 08:32:57,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:57,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706266509] [2021-11-09 08:32:57,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:57,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-09 08:32:57,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:57,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706266509] [2021-11-09 08:32:57,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706266509] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:57,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714265309] [2021-11-09 08:32:57,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:32:57,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:57,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:57,478 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:57,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-09 08:32:58,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:32:58,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:58,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 08:32:58,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:59,177 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-09 08:32:59,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714265309] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:59,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:59,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-11-09 08:32:59,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724903863] [2021-11-09 08:32:59,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 08:32:59,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:59,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 08:32:59,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-11-09 08:32:59,181 INFO L87 Difference]: Start difference. First operand 443 states and 503 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:59,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:59,972 INFO L93 Difference]: Finished difference Result 505 states and 561 transitions. [2021-11-09 08:32:59,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:32:59,972 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-09 08:32:59,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:59,975 INFO L225 Difference]: With dead ends: 505 [2021-11-09 08:32:59,975 INFO L226 Difference]: Without dead ends: 476 [2021-11-09 08:32:59,975 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-11-09 08:32:59,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-11-09 08:33:00,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 443. [2021-11-09 08:33:00,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.1199095022624435) internal successors, (495), 442 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:00,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 495 transitions. [2021-11-09 08:33:00,152 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 495 transitions. Word has length 38 [2021-11-09 08:33:00,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:00,152 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 495 transitions. [2021-11-09 08:33:00,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:00,152 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 495 transitions. [2021-11-09 08:33:00,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 08:33:00,153 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:00,154 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:00,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:00,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:00,354 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:00,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:00,355 INFO L85 PathProgramCache]: Analyzing trace with hash 130593719, now seen corresponding path program 57 times [2021-11-09 08:33:00,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:00,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598107366] [2021-11-09 08:33:00,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:00,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:00,741 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:33:00,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:00,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598107366] [2021-11-09 08:33:00,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598107366] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:00,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294030339] [2021-11-09 08:33:00,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:33:00,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:00,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:00,743 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:00,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-09 08:33:02,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 08:33:02,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:02,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 08:33:02,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:33:02,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294030339] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:02,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:02,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-11-09 08:33:02,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411264125] [2021-11-09 08:33:02,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 08:33:02,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:02,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 08:33:02,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1389, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 08:33:02,917 INFO L87 Difference]: Start difference. First operand 443 states and 495 transitions. Second operand has 39 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 39 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:07,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:07,046 INFO L93 Difference]: Finished difference Result 768 states and 835 transitions. [2021-11-09 08:33:07,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-09 08:33:07,047 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 39 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-09 08:33:07,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:07,050 INFO L225 Difference]: With dead ends: 768 [2021-11-09 08:33:07,051 INFO L226 Difference]: Without dead ends: 726 [2021-11-09 08:33:07,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2261 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2060, Invalid=9070, Unknown=0, NotChecked=0, Total=11130 [2021-11-09 08:33:07,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2021-11-09 08:33:07,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 490. [2021-11-09 08:33:07,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.1186094069529653) internal successors, (547), 489 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:07,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 547 transitions. [2021-11-09 08:33:07,247 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 547 transitions. Word has length 39 [2021-11-09 08:33:07,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:07,247 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 547 transitions. [2021-11-09 08:33:07,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 39 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:07,247 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 547 transitions. [2021-11-09 08:33:07,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 08:33:07,248 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:07,249 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:07,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:07,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-11-09 08:33:07,454 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:07,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:07,454 INFO L85 PathProgramCache]: Analyzing trace with hash -443143050, now seen corresponding path program 58 times [2021-11-09 08:33:07,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:07,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773503274] [2021-11-09 08:33:07,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:07,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:07,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:07,906 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:33:07,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:07,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773503274] [2021-11-09 08:33:07,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773503274] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:07,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978387834] [2021-11-09 08:33:07,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:33:07,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:07,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:07,908 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:07,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-09 08:33:09,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:33:09,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:09,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 08:33:09,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:33:10,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978387834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:10,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:10,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-11-09 08:33:10,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051256387] [2021-11-09 08:33:10,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 08:33:10,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:10,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 08:33:10,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 08:33:10,167 INFO L87 Difference]: Start difference. First operand 490 states and 547 transitions. Second operand has 40 states, 40 states have (on average 1.6) internal successors, (64), 40 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:11,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:11,866 INFO L93 Difference]: Finished difference Result 752 states and 814 transitions. [2021-11-09 08:33:11,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 08:33:11,866 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.6) internal successors, (64), 40 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-09 08:33:11,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:11,870 INFO L225 Difference]: With dead ends: 752 [2021-11-09 08:33:11,870 INFO L226 Difference]: Without dead ends: 731 [2021-11-09 08:33:11,871 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=215, Invalid=2235, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 08:33:11,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-11-09 08:33:12,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 495. [2021-11-09 08:33:12,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 1.1174089068825912) internal successors, (552), 494 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:12,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 552 transitions. [2021-11-09 08:33:12,084 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 552 transitions. Word has length 39 [2021-11-09 08:33:12,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:12,084 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 552 transitions. [2021-11-09 08:33:12,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.6) internal successors, (64), 40 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:12,085 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 552 transitions. [2021-11-09 08:33:12,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 08:33:12,086 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:12,086 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:12,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:12,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:12,290 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:12,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:12,290 INFO L85 PathProgramCache]: Analyzing trace with hash -24932840, now seen corresponding path program 59 times [2021-11-09 08:33:12,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:12,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353743954] [2021-11-09 08:33:12,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:12,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-09 08:33:12,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:12,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353743954] [2021-11-09 08:33:12,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353743954] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:12,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861382522] [2021-11-09 08:33:12,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:33:12,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:12,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:12,408 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:12,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-09 08:33:13,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 08:33:13,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:13,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 08:33:13,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-09 08:33:13,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861382522] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:13,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:13,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-11-09 08:33:13,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126177067] [2021-11-09 08:33:13,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:33:13,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:13,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:33:13,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:33:13,902 INFO L87 Difference]: Start difference. First operand 495 states and 552 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:14,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:14,304 INFO L93 Difference]: Finished difference Result 622 states and 690 transitions. [2021-11-09 08:33:14,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 08:33:14,304 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-09 08:33:14,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:14,307 INFO L225 Difference]: With dead ends: 622 [2021-11-09 08:33:14,307 INFO L226 Difference]: Without dead ends: 514 [2021-11-09 08:33:14,308 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2021-11-09 08:33:14,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-09 08:33:14,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 481. [2021-11-09 08:33:14,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 1.1125) internal successors, (534), 480 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:14,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 534 transitions. [2021-11-09 08:33:14,484 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 534 transitions. Word has length 39 [2021-11-09 08:33:14,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:14,484 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 534 transitions. [2021-11-09 08:33:14,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:14,484 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 534 transitions. [2021-11-09 08:33:14,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 08:33:14,486 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:14,486 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:14,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-11-09 08:33:14,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:14,686 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:14,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:14,687 INFO L85 PathProgramCache]: Analyzing trace with hash -601397259, now seen corresponding path program 60 times [2021-11-09 08:33:14,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:14,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003266927] [2021-11-09 08:33:14,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:14,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-09 08:33:14,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:14,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003266927] [2021-11-09 08:33:14,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003266927] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:14,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884778526] [2021-11-09 08:33:14,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:33:14,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:14,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:14,824 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:14,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-09 08:33:16,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-09 08:33:16,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:16,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 08:33:16,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-09 08:33:16,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884778526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:16,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:16,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-11-09 08:33:16,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812251474] [2021-11-09 08:33:16,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:33:16,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:16,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:33:16,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:33:16,378 INFO L87 Difference]: Start difference. First operand 481 states and 534 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:16,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:16,764 INFO L93 Difference]: Finished difference Result 521 states and 570 transitions. [2021-11-09 08:33:16,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 08:33:16,764 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-09 08:33:16,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:16,767 INFO L225 Difference]: With dead ends: 521 [2021-11-09 08:33:16,767 INFO L226 Difference]: Without dead ends: 515 [2021-11-09 08:33:16,767 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2021-11-09 08:33:16,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-11-09 08:33:16,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 482. [2021-11-09 08:33:16,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.1122661122661122) internal successors, (535), 481 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:16,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 535 transitions. [2021-11-09 08:33:16,932 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 535 transitions. Word has length 39 [2021-11-09 08:33:16,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:16,932 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 535 transitions. [2021-11-09 08:33:16,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:16,933 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 535 transitions. [2021-11-09 08:33:16,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 08:33:16,933 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:16,934 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:16,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:17,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-09 08:33:17,134 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:17,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:17,135 INFO L85 PathProgramCache]: Analyzing trace with hash -189895216, now seen corresponding path program 61 times [2021-11-09 08:33:17,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:17,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668827583] [2021-11-09 08:33:17,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:17,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:33:17,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:17,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668827583] [2021-11-09 08:33:17,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668827583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:17,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575338564] [2021-11-09 08:33:17,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:33:17,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:17,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:17,861 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:17,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-09 08:33:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:19,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-09 08:33:19,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:20,359 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:33:20,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575338564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:20,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:20,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 44 [2021-11-09 08:33:20,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332452996] [2021-11-09 08:33:20,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 08:33:20,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:20,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 08:33:20,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1789, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 08:33:20,362 INFO L87 Difference]: Start difference. First operand 482 states and 535 transitions. Second operand has 44 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:22,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:22,538 INFO L93 Difference]: Finished difference Result 872 states and 936 transitions. [2021-11-09 08:33:22,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-09 08:33:22,539 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 states have internal predecessors, (57), 0 states have call successors, (0), 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 [2021-11-09 08:33:22,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:22,543 INFO L225 Difference]: With dead ends: 872 [2021-11-09 08:33:22,543 INFO L226 Difference]: Without dead ends: 863 [2021-11-09 08:33:22,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=327, Invalid=4929, Unknown=0, NotChecked=0, Total=5256 [2021-11-09 08:33:22,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-11-09 08:33:22,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 491. [2021-11-09 08:33:22,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 1.1122448979591837) internal successors, (545), 490 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:22,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 545 transitions. [2021-11-09 08:33:22,751 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 545 transitions. Word has length 40 [2021-11-09 08:33:22,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:22,751 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 545 transitions. [2021-11-09 08:33:22,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:22,752 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 545 transitions. [2021-11-09 08:33:22,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 08:33:22,753 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:22,753 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:22,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:22,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:22,954 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:22,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:22,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1171113072, now seen corresponding path program 62 times [2021-11-09 08:33:22,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:22,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502486514] [2021-11-09 08:33:22,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:22,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:33:23,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:23,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502486514] [2021-11-09 08:33:23,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502486514] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:23,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90261336] [2021-11-09 08:33:23,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:33:23,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:23,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:23,507 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:23,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-09 08:33:24,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:33:24,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:24,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-09 08:33:24,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:33:25,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90261336] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:25,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:25,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 42 [2021-11-09 08:33:25,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216109831] [2021-11-09 08:33:25,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 08:33:25,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:25,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 08:33:25,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1620, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 08:33:25,709 INFO L87 Difference]: Start difference. First operand 491 states and 545 transitions. Second operand has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-11-09 08:33:27,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:27,612 INFO L93 Difference]: Finished difference Result 719 states and 772 transitions. [2021-11-09 08:33:27,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 08:33:27,613 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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 40 [2021-11-09 08:33:27,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:27,616 INFO L225 Difference]: With dead ends: 719 [2021-11-09 08:33:27,616 INFO L226 Difference]: Without dead ends: 692 [2021-11-09 08:33:27,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=300, Invalid=4256, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 08:33:27,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-11-09 08:33:27,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 482. [2021-11-09 08:33:27,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.1122661122661122) internal successors, (535), 481 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:27,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 535 transitions. [2021-11-09 08:33:27,797 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 535 transitions. Word has length 40 [2021-11-09 08:33:27,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:27,798 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 535 transitions. [2021-11-09 08:33:27,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-11-09 08:33:27,798 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 535 transitions. [2021-11-09 08:33:27,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 08:33:27,799 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:27,799 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:27,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-11-09 08:33:28,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:28,002 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:28,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:28,003 INFO L85 PathProgramCache]: Analyzing trace with hash 722054608, now seen corresponding path program 63 times [2021-11-09 08:33:28,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:28,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736862934] [2021-11-09 08:33:28,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:28,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:28,482 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:33:28,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:28,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736862934] [2021-11-09 08:33:28,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736862934] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:28,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29344838] [2021-11-09 08:33:28,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:33:28,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:28,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:28,484 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:28,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-09 08:33:29,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 08:33:29,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:29,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-09 08:33:29,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:33:30,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29344838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:30,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:30,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 40 [2021-11-09 08:33:30,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488141745] [2021-11-09 08:33:30,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 08:33:30,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:30,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 08:33:30,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1459, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 08:33:30,670 INFO L87 Difference]: Start difference. First operand 482 states and 535 transitions. Second operand has 40 states, 40 states have (on average 1.35) internal successors, (54), 40 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) [2021-11-09 08:33:32,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:32,275 INFO L93 Difference]: Finished difference Result 617 states and 669 transitions. [2021-11-09 08:33:32,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 08:33:32,276 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.35) internal successors, (54), 40 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 40 [2021-11-09 08:33:32,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:32,279 INFO L225 Difference]: With dead ends: 617 [2021-11-09 08:33:32,279 INFO L226 Difference]: Without dead ends: 589 [2021-11-09 08:33:32,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=294, Invalid=3738, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 08:33:32,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-09 08:33:32,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 471. [2021-11-09 08:33:32,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.1127659574468085) internal successors, (523), 470 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:32,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 523 transitions. [2021-11-09 08:33:32,448 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 523 transitions. Word has length 40 [2021-11-09 08:33:32,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:32,449 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 523 transitions. [2021-11-09 08:33:32,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.35) internal successors, (54), 40 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) [2021-11-09 08:33:32,449 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 523 transitions. [2021-11-09 08:33:32,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 08:33:32,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:32,450 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:32,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:32,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:32,651 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:32,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:32,651 INFO L85 PathProgramCache]: Analyzing trace with hash -923927664, now seen corresponding path program 64 times [2021-11-09 08:33:32,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:32,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269245327] [2021-11-09 08:33:32,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:32,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 08:33:33,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:33,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269245327] [2021-11-09 08:33:33,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269245327] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:33,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661480790] [2021-11-09 08:33:33,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:33:33,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:33,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:33,170 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:33,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-09 08:33:34,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:33:34,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:34,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 08:33:34,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 08:33:35,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661480790] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:35,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:35,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 38 [2021-11-09 08:33:35,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46514283] [2021-11-09 08:33:35,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 08:33:35,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:35,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 08:33:35,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1306, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 08:33:35,428 INFO L87 Difference]: Start difference. First operand 471 states and 523 transitions. Second operand has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 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) [2021-11-09 08:33:36,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:36,616 INFO L93 Difference]: Finished difference Result 535 states and 586 transitions. [2021-11-09 08:33:36,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 08:33:36,617 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 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 40 [2021-11-09 08:33:36,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:36,619 INFO L225 Difference]: With dead ends: 535 [2021-11-09 08:33:36,619 INFO L226 Difference]: Without dead ends: 506 [2021-11-09 08:33:36,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=288, Invalid=3252, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 08:33:36,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-11-09 08:33:36,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 458. [2021-11-09 08:33:36,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.113785557986871) internal successors, (509), 457 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:36,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 509 transitions. [2021-11-09 08:33:36,778 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 509 transitions. Word has length 40 [2021-11-09 08:33:36,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:36,779 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 509 transitions. [2021-11-09 08:33:36,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 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) [2021-11-09 08:33:36,779 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 509 transitions. [2021-11-09 08:33:36,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 08:33:36,780 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:36,780 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:36,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-11-09 08:33:36,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-11-09 08:33:36,981 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:36,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:36,981 INFO L85 PathProgramCache]: Analyzing trace with hash 137817552, now seen corresponding path program 65 times [2021-11-09 08:33:36,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:36,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346116390] [2021-11-09 08:33:36,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:36,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-09 08:33:37,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:37,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346116390] [2021-11-09 08:33:37,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346116390] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:37,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534187142] [2021-11-09 08:33:37,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:33:37,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:37,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:37,384 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:37,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-09 08:33:38,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 08:33:38,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:38,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 08:33:38,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-09 08:33:39,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534187142] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:39,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:39,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 36 [2021-11-09 08:33:39,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780301956] [2021-11-09 08:33:39,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 08:33:39,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:39,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 08:33:39,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1161, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 08:33:39,653 INFO L87 Difference]: Start difference. First operand 458 states and 509 transitions. Second operand has 36 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 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) [2021-11-09 08:33:40,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:40,620 INFO L93 Difference]: Finished difference Result 504 states and 557 transitions. [2021-11-09 08:33:40,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 08:33:40,621 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 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 40 [2021-11-09 08:33:40,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:40,623 INFO L225 Difference]: With dead ends: 504 [2021-11-09 08:33:40,624 INFO L226 Difference]: Without dead ends: 498 [2021-11-09 08:33:40,624 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=282, Invalid=2798, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 08:33:40,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-09 08:33:40,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 471. [2021-11-09 08:33:40,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.1148936170212767) internal successors, (524), 470 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:40,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 524 transitions. [2021-11-09 08:33:40,794 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 524 transitions. Word has length 40 [2021-11-09 08:33:40,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:40,794 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 524 transitions. [2021-11-09 08:33:40,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 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) [2021-11-09 08:33:40,795 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 524 transitions. [2021-11-09 08:33:40,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 08:33:40,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:40,796 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:40,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:40,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:40,996 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:40,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:40,997 INFO L85 PathProgramCache]: Analyzing trace with hash -929146954, now seen corresponding path program 66 times [2021-11-09 08:33:40,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:40,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489643299] [2021-11-09 08:33:40,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:40,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:41,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:41,489 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:33:41,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:41,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489643299] [2021-11-09 08:33:41,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489643299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:41,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793883985] [2021-11-09 08:33:41,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:33:41,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:41,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:41,492 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:41,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-09 08:33:43,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-09 08:33:43,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:43,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 08:33:43,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:33:44,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793883985] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:44,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:44,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 43 [2021-11-09 08:33:44,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324663892] [2021-11-09 08:33:44,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-09 08:33:44,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:44,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-09 08:33:44,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1703, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 08:33:44,009 INFO L87 Difference]: Start difference. First operand 471 states and 524 transitions. Second operand has 43 states, 43 states have (on average 1.558139534883721) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:49,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:49,469 INFO L93 Difference]: Finished difference Result 834 states and 902 transitions. [2021-11-09 08:33:49,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-09 08:33:49,470 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.558139534883721) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-09 08:33:49,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:49,474 INFO L225 Difference]: With dead ends: 834 [2021-11-09 08:33:49,474 INFO L226 Difference]: Without dead ends: 790 [2021-11-09 08:33:49,475 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3195 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2745, Invalid=12261, Unknown=0, NotChecked=0, Total=15006 [2021-11-09 08:33:49,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-11-09 08:33:49,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 519. [2021-11-09 08:33:49,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 1.113899613899614) internal successors, (577), 518 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:49,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 577 transitions. [2021-11-09 08:33:49,683 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 577 transitions. Word has length 41 [2021-11-09 08:33:49,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:49,684 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 577 transitions. [2021-11-09 08:33:49,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.558139534883721) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:49,684 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 577 transitions. [2021-11-09 08:33:49,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 08:33:49,685 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:49,685 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:49,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-11-09 08:33:49,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:49,886 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:49,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:49,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1535117609, now seen corresponding path program 67 times [2021-11-09 08:33:49,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:49,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152278389] [2021-11-09 08:33:49,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:49,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:33:50,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:50,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152278389] [2021-11-09 08:33:50,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152278389] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:50,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661850958] [2021-11-09 08:33:50,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:33:50,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:50,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:50,439 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:50,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-09 08:33:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:52,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 08:33:52,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:33:53,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661850958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:53,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:53,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 44 [2021-11-09 08:33:53,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412608724] [2021-11-09 08:33:53,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 08:33:53,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:53,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 08:33:53,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 08:33:53,045 INFO L87 Difference]: Start difference. First operand 519 states and 577 transitions. Second operand has 44 states, 44 states have (on average 1.5454545454545454) internal successors, (68), 44 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) [2021-11-09 08:33:55,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:55,039 INFO L93 Difference]: Finished difference Result 817 states and 880 transitions. [2021-11-09 08:33:55,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 08:33:55,039 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5454545454545454) internal successors, (68), 44 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 41 [2021-11-09 08:33:55,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:55,043 INFO L225 Difference]: With dead ends: 817 [2021-11-09 08:33:55,043 INFO L226 Difference]: Without dead ends: 795 [2021-11-09 08:33:55,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=243, Invalid=2727, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 08:33:55,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2021-11-09 08:33:55,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 524. [2021-11-09 08:33:55,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 1.112810707456979) internal successors, (582), 523 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:55,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 582 transitions. [2021-11-09 08:33:55,260 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 582 transitions. Word has length 41 [2021-11-09 08:33:55,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:55,261 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 582 transitions. [2021-11-09 08:33:55,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5454545454545454) internal successors, (68), 44 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) [2021-11-09 08:33:55,261 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 582 transitions. [2021-11-09 08:33:55,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 08:33:55,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:55,262 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:55,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-11-09 08:33:55,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-11-09 08:33:55,463 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:55,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:55,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1578640213, now seen corresponding path program 68 times [2021-11-09 08:33:55,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:55,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343778361] [2021-11-09 08:33:55,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:55,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:55,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-09 08:33:55,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:55,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343778361] [2021-11-09 08:33:55,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343778361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:55,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668517126] [2021-11-09 08:33:55,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:33:55,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:55,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:55,602 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:55,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-09 08:33:57,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:33:57,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:57,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 08:33:57,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:57,416 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-09 08:33:57,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668517126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:57,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:57,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-11-09 08:33:57,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929649933] [2021-11-09 08:33:57,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 08:33:57,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:57,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 08:33:57,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:33:57,418 INFO L87 Difference]: Start difference. First operand 524 states and 582 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-11-09 08:33:58,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:58,117 INFO L93 Difference]: Finished difference Result 618 states and 684 transitions. [2021-11-09 08:33:58,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 08:33:58,118 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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 41 [2021-11-09 08:33:58,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:58,120 INFO L225 Difference]: With dead ends: 618 [2021-11-09 08:33:58,120 INFO L226 Difference]: Without dead ends: 602 [2021-11-09 08:33:58,121 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 08:33:58,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-11-09 08:33:58,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 558. [2021-11-09 08:33:58,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 1.125673249551167) internal successors, (627), 557 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:58,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 627 transitions. [2021-11-09 08:33:58,340 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 627 transitions. Word has length 41 [2021-11-09 08:33:58,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:58,340 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 627 transitions. [2021-11-09 08:33:58,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-11-09 08:33:58,340 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 627 transitions. [2021-11-09 08:33:58,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 08:33:58,341 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:58,341 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:58,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:58,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:58,542 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:58,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:58,542 INFO L85 PathProgramCache]: Analyzing trace with hash 888112408, now seen corresponding path program 69 times [2021-11-09 08:33:58,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:58,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231468334] [2021-11-09 08:33:58,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:58,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-09 08:33:58,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:58,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231468334] [2021-11-09 08:33:58,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231468334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:58,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444080139] [2021-11-09 08:33:58,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:33:58,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:58,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:58,666 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:58,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-09 08:34:00,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 08:34:00,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:00,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 08:34:00,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-09 08:34:00,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444080139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:00,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:00,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-11-09 08:34:00,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507211258] [2021-11-09 08:34:00,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 08:34:00,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:00,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 08:34:00,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:34:00,514 INFO L87 Difference]: Start difference. First operand 558 states and 627 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-11-09 08:34:01,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:01,268 INFO L93 Difference]: Finished difference Result 996 states and 1135 transitions. [2021-11-09 08:34:01,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 08:34:01,268 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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 41 [2021-11-09 08:34:01,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:01,272 INFO L225 Difference]: With dead ends: 996 [2021-11-09 08:34:01,272 INFO L226 Difference]: Without dead ends: 834 [2021-11-09 08:34:01,273 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 08:34:01,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-11-09 08:34:01,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 640. [2021-11-09 08:34:01,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.1267605633802817) internal successors, (720), 639 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:01,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 720 transitions. [2021-11-09 08:34:01,520 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 720 transitions. Word has length 41 [2021-11-09 08:34:01,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:01,521 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 720 transitions. [2021-11-09 08:34:01,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-11-09 08:34:01,521 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 720 transitions. [2021-11-09 08:34:01,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 08:34:01,522 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:01,522 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:01,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-11-09 08:34:01,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-11-09 08:34:01,723 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:01,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:01,723 INFO L85 PathProgramCache]: Analyzing trace with hash 318631823, now seen corresponding path program 70 times [2021-11-09 08:34:01,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:01,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590149431] [2021-11-09 08:34:01,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:01,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:01,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:34:02,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:02,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590149431] [2021-11-09 08:34:02,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590149431] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:02,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883486654] [2021-11-09 08:34:02,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:34:02,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:02,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:02,558 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:02,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-09 08:34:04,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:34:04,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:04,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-09 08:34:04,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:34:05,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883486654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:05,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:05,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 47 [2021-11-09 08:34:05,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862895769] [2021-11-09 08:34:05,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-09 08:34:05,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:05,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-09 08:34:05,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2052, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 08:34:05,131 INFO L87 Difference]: Start difference. First operand 640 states and 720 transitions. Second operand has 47 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 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) [2021-11-09 08:34:08,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:08,083 INFO L93 Difference]: Finished difference Result 1165 states and 1259 transitions. [2021-11-09 08:34:08,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-09 08:34:08,084 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 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 42 [2021-11-09 08:34:08,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:08,089 INFO L225 Difference]: With dead ends: 1165 [2021-11-09 08:34:08,089 INFO L226 Difference]: Without dead ends: 1156 [2021-11-09 08:34:08,089 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=346, Invalid=5660, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 08:34:08,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2021-11-09 08:34:08,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 649. [2021-11-09 08:34:08,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 1.126543209876543) internal successors, (730), 648 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:08,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 730 transitions. [2021-11-09 08:34:08,371 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 730 transitions. Word has length 42 [2021-11-09 08:34:08,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:08,371 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 730 transitions. [2021-11-09 08:34:08,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 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) [2021-11-09 08:34:08,371 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 730 transitions. [2021-11-09 08:34:08,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 08:34:08,372 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:08,372 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:08,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:08,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-09 08:34:08,573 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:08,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:08,573 INFO L85 PathProgramCache]: Analyzing trace with hash -225136977, now seen corresponding path program 71 times [2021-11-09 08:34:08,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:08,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754279301] [2021-11-09 08:34:08,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:08,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:08,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:34:09,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:09,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754279301] [2021-11-09 08:34:09,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754279301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:09,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659093778] [2021-11-09 08:34:09,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:34:09,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:09,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:09,182 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:09,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-09 08:34:10,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 08:34:10,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:10,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-09 08:34:10,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:11,727 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:34:11,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659093778] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:11,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:11,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 45 [2021-11-09 08:34:11,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058212497] [2021-11-09 08:34:11,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-09 08:34:11,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:11,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-09 08:34:11,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1871, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 08:34:11,729 INFO L87 Difference]: Start difference. First operand 649 states and 730 transitions. Second operand has 45 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:14,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:14,106 INFO L93 Difference]: Finished difference Result 983 states and 1063 transitions. [2021-11-09 08:34:14,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-09 08:34:14,106 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-09 08:34:14,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:14,110 INFO L225 Difference]: With dead ends: 983 [2021-11-09 08:34:14,111 INFO L226 Difference]: Without dead ends: 955 [2021-11-09 08:34:14,111 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=318, Invalid=4938, Unknown=0, NotChecked=0, Total=5256 [2021-11-09 08:34:14,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-11-09 08:34:14,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 640. [2021-11-09 08:34:14,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.1267605633802817) internal successors, (720), 639 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:14,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 720 transitions. [2021-11-09 08:34:14,359 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 720 transitions. Word has length 42 [2021-11-09 08:34:14,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:14,359 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 720 transitions. [2021-11-09 08:34:14,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:14,359 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 720 transitions. [2021-11-09 08:34:14,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 08:34:14,360 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:14,361 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:14,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:14,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:14,561 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:14,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:14,562 INFO L85 PathProgramCache]: Analyzing trace with hash -284040433, now seen corresponding path program 72 times [2021-11-09 08:34:14,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:14,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261561050] [2021-11-09 08:34:14,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:14,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:34:15,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:15,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261561050] [2021-11-09 08:34:15,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261561050] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:15,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067013267] [2021-11-09 08:34:15,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:34:15,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:15,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:15,148 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:15,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-09 08:34:16,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-09 08:34:16,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:16,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-09 08:34:16,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:34:17,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067013267] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:17,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:17,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 43 [2021-11-09 08:34:17,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192113161] [2021-11-09 08:34:17,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-09 08:34:17,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:17,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-09 08:34:17,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1698, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 08:34:17,659 INFO L87 Difference]: Start difference. First operand 640 states and 720 transitions. Second operand has 43 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:19,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:19,687 INFO L93 Difference]: Finished difference Result 853 states and 932 transitions. [2021-11-09 08:34:19,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 08:34:19,687 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 0 states have call successors, (0), 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 [2021-11-09 08:34:19,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:19,691 INFO L225 Difference]: With dead ends: 853 [2021-11-09 08:34:19,691 INFO L226 Difference]: Without dead ends: 824 [2021-11-09 08:34:19,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=312, Invalid=4380, Unknown=0, NotChecked=0, Total=4692 [2021-11-09 08:34:19,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-11-09 08:34:19,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 629. [2021-11-09 08:34:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.127388535031847) internal successors, (708), 628 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:19,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 708 transitions. [2021-11-09 08:34:19,936 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 708 transitions. Word has length 42 [2021-11-09 08:34:19,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:19,936 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 708 transitions. [2021-11-09 08:34:19,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:19,937 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 708 transitions. [2021-11-09 08:34:19,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 08:34:19,938 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:19,938 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:19,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-11-09 08:34:20,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:20,139 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:20,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:20,139 INFO L85 PathProgramCache]: Analyzing trace with hash -2122368209, now seen corresponding path program 73 times [2021-11-09 08:34:20,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:20,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991971217] [2021-11-09 08:34:20,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:20,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:20,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 08:34:20,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:20,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991971217] [2021-11-09 08:34:20,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991971217] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:20,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148928135] [2021-11-09 08:34:20,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:34:20,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:20,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:20,634 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:20,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-09 08:34:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:22,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-09 08:34:22,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 08:34:23,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148928135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:23,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:23,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 41 [2021-11-09 08:34:23,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439197633] [2021-11-09 08:34:23,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-09 08:34:23,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:23,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-09 08:34:23,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1533, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 08:34:23,217 INFO L87 Difference]: Start difference. First operand 629 states and 708 transitions. Second operand has 41 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 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) [2021-11-09 08:34:24,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:24,910 INFO L93 Difference]: Finished difference Result 754 states and 832 transitions. [2021-11-09 08:34:24,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 08:34:24,910 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 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 42 [2021-11-09 08:34:24,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:24,913 INFO L225 Difference]: With dead ends: 754 [2021-11-09 08:34:24,914 INFO L226 Difference]: Without dead ends: 724 [2021-11-09 08:34:24,914 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=306, Invalid=3854, Unknown=0, NotChecked=0, Total=4160 [2021-11-09 08:34:24,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-11-09 08:34:25,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 616. [2021-11-09 08:34:25,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 1.1284552845528455) internal successors, (694), 615 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:25,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 694 transitions. [2021-11-09 08:34:25,150 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 694 transitions. Word has length 42 [2021-11-09 08:34:25,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:25,150 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 694 transitions. [2021-11-09 08:34:25,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 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) [2021-11-09 08:34:25,151 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 694 transitions. [2021-11-09 08:34:25,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 08:34:25,152 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:25,152 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:25,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:25,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:25,352 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:25,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:25,353 INFO L85 PathProgramCache]: Analyzing trace with hash -147720610, now seen corresponding path program 74 times [2021-11-09 08:34:25,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:25,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407310896] [2021-11-09 08:34:25,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:25,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-09 08:34:25,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:25,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407310896] [2021-11-09 08:34:25,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407310896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:25,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604742116] [2021-11-09 08:34:25,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:34:25,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:25,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:25,638 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:25,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-09 08:34:27,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:34:27,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:27,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 08:34:27,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-09 08:34:27,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604742116] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:27,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:27,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-11-09 08:34:27,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11733357] [2021-11-09 08:34:27,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 08:34:27,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:27,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 08:34:27,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-11-09 08:34:27,816 INFO L87 Difference]: Start difference. First operand 616 states and 694 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 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) [2021-11-09 08:34:29,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:29,635 INFO L93 Difference]: Finished difference Result 816 states and 910 transitions. [2021-11-09 08:34:29,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 08:34:29,635 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 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 42 [2021-11-09 08:34:29,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:29,639 INFO L225 Difference]: With dead ends: 816 [2021-11-09 08:34:29,640 INFO L226 Difference]: Without dead ends: 753 [2021-11-09 08:34:29,640 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=748, Invalid=3034, Unknown=0, NotChecked=0, Total=3782 [2021-11-09 08:34:29,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-11-09 08:34:29,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 681. [2021-11-09 08:34:29,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.1147058823529412) internal successors, (758), 680 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:29,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 758 transitions. [2021-11-09 08:34:29,930 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 758 transitions. Word has length 42 [2021-11-09 08:34:29,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:29,930 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 758 transitions. [2021-11-09 08:34:29,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 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) [2021-11-09 08:34:29,930 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 758 transitions. [2021-11-09 08:34:29,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 08:34:29,932 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:29,932 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:29,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:30,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:30,132 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:30,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:30,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1018615439, now seen corresponding path program 75 times [2021-11-09 08:34:30,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:30,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443381412] [2021-11-09 08:34:30,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:30,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-09 08:34:30,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:30,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443381412] [2021-11-09 08:34:30,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443381412] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:30,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657165317] [2021-11-09 08:34:30,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:34:30,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:30,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:30,647 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:30,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-11-09 08:34:32,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 08:34:32,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:32,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 08:34:32,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-09 08:34:33,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657165317] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:33,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:33,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 39 [2021-11-09 08:34:33,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838741746] [2021-11-09 08:34:33,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 08:34:33,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:33,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 08:34:33,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 08:34:33,178 INFO L87 Difference]: Start difference. First operand 681 states and 758 transitions. Second operand has 39 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:34,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:34,605 INFO L93 Difference]: Finished difference Result 774 states and 854 transitions. [2021-11-09 08:34:34,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 08:34:34,606 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-09 08:34:34,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:34,610 INFO L225 Difference]: With dead ends: 774 [2021-11-09 08:34:34,610 INFO L226 Difference]: Without dead ends: 743 [2021-11-09 08:34:34,611 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=300, Invalid=3360, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 08:34:34,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-11-09 08:34:34,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 677. [2021-11-09 08:34:34,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 1.1168639053254439) internal successors, (755), 676 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:34,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 755 transitions. [2021-11-09 08:34:34,930 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 755 transitions. Word has length 42 [2021-11-09 08:34:34,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:34,930 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 755 transitions. [2021-11-09 08:34:34,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:34,930 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 755 transitions. [2021-11-09 08:34:34,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 08:34:34,932 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:34,932 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:34,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-11-09 08:34:35,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:35,138 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:35,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:35,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1114544290, now seen corresponding path program 76 times [2021-11-09 08:34:35,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:35,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477496561] [2021-11-09 08:34:35,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:35,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-09 08:34:35,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:35,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477496561] [2021-11-09 08:34:35,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477496561] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:35,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389404965] [2021-11-09 08:34:35,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:34:35,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:35,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:35,450 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:35,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-09 08:34:37,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:34:37,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:37,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 08:34:37,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-09 08:34:37,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389404965] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:37,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:37,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-11-09 08:34:37,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478141612] [2021-11-09 08:34:37,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 08:34:37,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:37,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 08:34:37,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-11-09 08:34:37,848 INFO L87 Difference]: Start difference. First operand 677 states and 755 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:38,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:38,863 INFO L93 Difference]: Finished difference Result 755 states and 828 transitions. [2021-11-09 08:34:38,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 08:34:38,863 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-09 08:34:38,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:38,867 INFO L225 Difference]: With dead ends: 755 [2021-11-09 08:34:38,867 INFO L226 Difference]: Without dead ends: 721 [2021-11-09 08:34:38,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 08:34:38,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-11-09 08:34:39,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 677. [2021-11-09 08:34:39,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 1.1020710059171597) internal successors, (745), 676 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:39,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 745 transitions. [2021-11-09 08:34:39,155 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 745 transitions. Word has length 42 [2021-11-09 08:34:39,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:39,155 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 745 transitions. [2021-11-09 08:34:39,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:39,156 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 745 transitions. [2021-11-09 08:34:39,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 08:34:39,157 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:39,157 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:39,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:39,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-11-09 08:34:39,358 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:39,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:39,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1950289367, now seen corresponding path program 77 times [2021-11-09 08:34:39,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:39,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544259286] [2021-11-09 08:34:39,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:39,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:34:39,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:39,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544259286] [2021-11-09 08:34:39,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544259286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:39,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999550734] [2021-11-09 08:34:39,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:34:39,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:39,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:39,812 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:39,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-09 08:34:41,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-09 08:34:41,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:41,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 08:34:41,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:34:42,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999550734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:42,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:42,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 47 [2021-11-09 08:34:42,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179871061] [2021-11-09 08:34:42,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-09 08:34:42,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:42,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-09 08:34:42,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2049, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 08:34:42,740 INFO L87 Difference]: Start difference. First operand 677 states and 745 transitions. Second operand has 47 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 47 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:49,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:49,794 INFO L93 Difference]: Finished difference Result 1173 states and 1259 transitions. [2021-11-09 08:34:49,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-09 08:34:49,794 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 47 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-09 08:34:49,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:49,797 INFO L225 Difference]: With dead ends: 1173 [2021-11-09 08:34:49,797 INFO L226 Difference]: Without dead ends: 1125 [2021-11-09 08:34:49,799 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4369 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=3576, Invalid=16164, Unknown=0, NotChecked=0, Total=19740 [2021-11-09 08:34:49,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-11-09 08:34:50,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 743. [2021-11-09 08:34:50,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.101078167115903) internal successors, (817), 742 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:50,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 817 transitions. [2021-11-09 08:34:50,121 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 817 transitions. Word has length 43 [2021-11-09 08:34:50,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:50,121 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 817 transitions. [2021-11-09 08:34:50,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 47 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:50,121 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 817 transitions. [2021-11-09 08:34:50,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 08:34:50,123 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:50,124 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:50,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:50,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:50,338 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:50,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:50,338 INFO L85 PathProgramCache]: Analyzing trace with hash 345068246, now seen corresponding path program 78 times [2021-11-09 08:34:50,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:50,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399826297] [2021-11-09 08:34:50,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:50,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:34:50,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:50,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399826297] [2021-11-09 08:34:50,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399826297] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:50,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147949970] [2021-11-09 08:34:50,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:34:50,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:50,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:50,843 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:50,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-11-09 08:34:52,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 08:34:52,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:52,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 08:34:52,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:34:53,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147949970] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:53,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:53,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 48 [2021-11-09 08:34:53,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334177765] [2021-11-09 08:34:53,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-09 08:34:53,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:53,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-09 08:34:53,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=2140, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 08:34:53,715 INFO L87 Difference]: Start difference. First operand 743 states and 817 transitions. Second operand has 48 states, 48 states have (on average 1.5) internal successors, (72), 48 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) [2021-11-09 08:34:56,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:56,365 INFO L93 Difference]: Finished difference Result 1155 states and 1235 transitions. [2021-11-09 08:34:56,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 08:34:56,366 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.5) internal successors, (72), 48 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 43 [2021-11-09 08:34:56,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:56,368 INFO L225 Difference]: With dead ends: 1155 [2021-11-09 08:34:56,368 INFO L226 Difference]: Without dead ends: 1131 [2021-11-09 08:34:56,368 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=272, Invalid=3268, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 08:34:56,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-11-09 08:34:56,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 749. [2021-11-09 08:34:56,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.1002673796791445) internal successors, (823), 748 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:56,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 823 transitions. [2021-11-09 08:34:56,698 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 823 transitions. Word has length 43 [2021-11-09 08:34:56,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:56,698 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 823 transitions. [2021-11-09 08:34:56,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.5) internal successors, (72), 48 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) [2021-11-09 08:34:56,699 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 823 transitions. [2021-11-09 08:34:56,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 08:34:56,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:56,700 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:56,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-11-09 08:34:56,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:56,901 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:56,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:56,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1718266860, now seen corresponding path program 79 times [2021-11-09 08:34:56,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:56,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067385671] [2021-11-09 08:34:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:56,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-09 08:34:57,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:57,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067385671] [2021-11-09 08:34:57,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067385671] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:57,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339608224] [2021-11-09 08:34:57,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:34:57,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:57,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:57,049 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:57,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-09 08:34:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:58,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:34:58,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:59,034 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-09 08:34:59,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339608224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:59,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:59,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 08:34:59,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718466300] [2021-11-09 08:34:59,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 08:34:59,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:59,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 08:34:59,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:34:59,036 INFO L87 Difference]: Start difference. First operand 749 states and 823 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 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) [2021-11-09 08:34:59,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:59,726 INFO L93 Difference]: Finished difference Result 919 states and 1007 transitions. [2021-11-09 08:34:59,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 08:34:59,726 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 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 43 [2021-11-09 08:34:59,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:59,728 INFO L225 Difference]: With dead ends: 919 [2021-11-09 08:34:59,728 INFO L226 Difference]: Without dead ends: 779 [2021-11-09 08:34:59,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=478, Invalid=854, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 08:34:59,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-11-09 08:35:00,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 735. [2021-11-09 08:35:00,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 1.0967302452316077) internal successors, (805), 734 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:00,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 805 transitions. [2021-11-09 08:35:00,064 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 805 transitions. Word has length 43 [2021-11-09 08:35:00,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:00,065 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 805 transitions. [2021-11-09 08:35:00,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 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) [2021-11-09 08:35:00,065 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 805 transitions. [2021-11-09 08:35:00,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 08:35:00,066 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:00,066 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:00,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-11-09 08:35:00,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-11-09 08:35:00,267 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:00,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:00,267 INFO L85 PathProgramCache]: Analyzing trace with hash -2059418347, now seen corresponding path program 80 times [2021-11-09 08:35:00,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:00,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591392437] [2021-11-09 08:35:00,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:00,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-09 08:35:00,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:00,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591392437] [2021-11-09 08:35:00,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591392437] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:00,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10439549] [2021-11-09 08:35:00,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:35:00,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:00,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:00,395 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:00,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-11-09 08:35:02,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:35:02,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:02,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:35:02,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:02,448 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-09 08:35:02,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10439549] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:02,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:35:02,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 08:35:02,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548335571] [2021-11-09 08:35:02,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 08:35:02,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:02,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 08:35:02,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:35:02,450 INFO L87 Difference]: Start difference. First operand 735 states and 805 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 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) [2021-11-09 08:35:03,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:03,173 INFO L93 Difference]: Finished difference Result 786 states and 851 transitions. [2021-11-09 08:35:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 08:35:03,174 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 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 43 [2021-11-09 08:35:03,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:03,175 INFO L225 Difference]: With dead ends: 786 [2021-11-09 08:35:03,175 INFO L226 Difference]: Without dead ends: 780 [2021-11-09 08:35:03,176 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=478, Invalid=854, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 08:35:03,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-11-09 08:35:03,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 736. [2021-11-09 08:35:03,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 1.0965986394557823) internal successors, (806), 735 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:03,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 806 transitions. [2021-11-09 08:35:03,513 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 806 transitions. Word has length 43 [2021-11-09 08:35:03,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:03,514 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 806 transitions. [2021-11-09 08:35:03,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 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) [2021-11-09 08:35:03,514 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 806 transitions. [2021-11-09 08:35:03,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 08:35:03,515 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:03,515 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:03,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:03,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:03,716 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:03,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:03,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1525148816, now seen corresponding path program 81 times [2021-11-09 08:35:03,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:03,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219324082] [2021-11-09 08:35:03,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:03,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:35:04,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:04,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219324082] [2021-11-09 08:35:04,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219324082] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:04,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177151489] [2021-11-09 08:35:04,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:35:04,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:04,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:04,470 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:04,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-11-09 08:35:06,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-09 08:35:06,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:06,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-09 08:35:06,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:35:07,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177151489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:07,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:35:07,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 50 [2021-11-09 08:35:07,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373186121] [2021-11-09 08:35:07,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-09 08:35:07,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:07,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-09 08:35:07,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2333, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 08:35:07,388 INFO L87 Difference]: Start difference. First operand 736 states and 806 transitions. Second operand has 50 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:10,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:10,838 INFO L93 Difference]: Finished difference Result 1317 states and 1400 transitions. [2021-11-09 08:35:10,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-09 08:35:10,839 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-09 08:35:10,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:10,840 INFO L225 Difference]: With dead ends: 1317 [2021-11-09 08:35:10,841 INFO L226 Difference]: Without dead ends: 1308 [2021-11-09 08:35:10,841 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=365, Invalid=6441, Unknown=0, NotChecked=0, Total=6806 [2021-11-09 08:35:10,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-11-09 08:35:11,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 745. [2021-11-09 08:35:11,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 1.096774193548387) internal successors, (816), 744 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:11,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 816 transitions. [2021-11-09 08:35:11,173 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 816 transitions. Word has length 44 [2021-11-09 08:35:11,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:11,174 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 816 transitions. [2021-11-09 08:35:11,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:11,174 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 816 transitions. [2021-11-09 08:35:11,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 08:35:11,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:11,176 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:11,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:11,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:11,402 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:11,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:11,402 INFO L85 PathProgramCache]: Analyzing trace with hash 39040176, now seen corresponding path program 82 times [2021-11-09 08:35:11,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:11,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974452704] [2021-11-09 08:35:11,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:11,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:35:12,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:12,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974452704] [2021-11-09 08:35:12,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974452704] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:12,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553534174] [2021-11-09 08:35:12,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:35:12,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:12,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:12,057 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:12,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-11-09 08:35:14,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:35:14,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:14,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-09 08:35:14,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:35:15,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553534174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:15,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:35:15,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 48 [2021-11-09 08:35:15,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672493441] [2021-11-09 08:35:15,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-09 08:35:15,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:15,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-09 08:35:15,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=2140, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 08:35:15,030 INFO L87 Difference]: Start difference. First operand 745 states and 816 transitions. Second operand has 48 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 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) [2021-11-09 08:35:17,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:17,976 INFO L93 Difference]: Finished difference Result 1118 states and 1188 transitions. [2021-11-09 08:35:17,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 08:35:17,977 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 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 44 [2021-11-09 08:35:17,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:17,979 INFO L225 Difference]: With dead ends: 1118 [2021-11-09 08:35:17,979 INFO L226 Difference]: Without dead ends: 1089 [2021-11-09 08:35:17,979 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=336, Invalid=5670, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 08:35:17,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-11-09 08:35:18,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 736. [2021-11-09 08:35:18,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 1.0965986394557823) internal successors, (806), 735 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:18,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 806 transitions. [2021-11-09 08:35:18,315 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 806 transitions. Word has length 44 [2021-11-09 08:35:18,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:18,315 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 806 transitions. [2021-11-09 08:35:18,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 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) [2021-11-09 08:35:18,315 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 806 transitions. [2021-11-09 08:35:18,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 08:35:18,317 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:18,318 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:18,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-11-09 08:35:18,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:18,546 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:18,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:18,546 INFO L85 PathProgramCache]: Analyzing trace with hash 888591216, now seen corresponding path program 83 times [2021-11-09 08:35:18,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:18,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946997676] [2021-11-09 08:35:18,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:18,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:35:19,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:19,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946997676] [2021-11-09 08:35:19,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946997676] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:19,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200120059] [2021-11-09 08:35:19,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:35:19,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:19,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:19,329 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:19,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-11-09 08:35:21,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 08:35:21,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:21,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-09 08:35:21,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:22,462 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:35:22,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200120059] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:22,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:35:22,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 46 [2021-11-09 08:35:22,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624751625] [2021-11-09 08:35:22,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-09 08:35:22,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:22,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-09 08:35:22,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1955, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 08:35:22,464 INFO L87 Difference]: Start difference. First operand 736 states and 806 transitions. Second operand has 46 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 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) [2021-11-09 08:35:24,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:24,924 INFO L93 Difference]: Finished difference Result 977 states and 1046 transitions. [2021-11-09 08:35:24,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 08:35:24,924 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 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 44 [2021-11-09 08:35:24,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:24,926 INFO L225 Difference]: With dead ends: 977 [2021-11-09 08:35:24,926 INFO L226 Difference]: Without dead ends: 947 [2021-11-09 08:35:24,927 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=330, Invalid=5072, Unknown=0, NotChecked=0, Total=5402 [2021-11-09 08:35:24,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-11-09 08:35:25,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 725. [2021-11-09 08:35:25,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 1.0966850828729282) internal successors, (794), 724 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:25,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 794 transitions. [2021-11-09 08:35:25,359 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 794 transitions. Word has length 44 [2021-11-09 08:35:25,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:25,359 INFO L470 AbstractCegarLoop]: Abstraction has 725 states and 794 transitions. [2021-11-09 08:35:25,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 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) [2021-11-09 08:35:25,360 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 794 transitions. [2021-11-09 08:35:25,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 08:35:25,361 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:25,361 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:25,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:25,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:25,566 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:25,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:25,566 INFO L85 PathProgramCache]: Analyzing trace with hash -359009104, now seen corresponding path program 84 times [2021-11-09 08:35:25,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:25,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348051090] [2021-11-09 08:35:25,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:25,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 08:35:26,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:26,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348051090] [2021-11-09 08:35:26,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348051090] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:26,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833144035] [2021-11-09 08:35:26,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:35:26,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:26,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:26,099 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:26,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-11-09 08:35:28,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-09 08:35:28,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:28,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-09 08:35:28,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 08:35:29,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833144035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:29,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:35:29,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 44 [2021-11-09 08:35:29,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786236103] [2021-11-09 08:35:29,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 08:35:29,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:29,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 08:35:29,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1778, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 08:35:29,097 INFO L87 Difference]: Start difference. First operand 725 states and 794 transitions. Second operand has 44 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 44 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:31,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:31,136 INFO L93 Difference]: Finished difference Result 869 states and 937 transitions. [2021-11-09 08:35:31,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 08:35:31,136 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 44 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-09 08:35:31,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:31,138 INFO L225 Difference]: With dead ends: 869 [2021-11-09 08:35:31,138 INFO L226 Difference]: Without dead ends: 838 [2021-11-09 08:35:31,138 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=324, Invalid=4506, Unknown=0, NotChecked=0, Total=4830 [2021-11-09 08:35:31,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-11-09 08:35:31,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 712. [2021-11-09 08:35:31,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 1.0970464135021096) internal successors, (780), 711 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:31,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 780 transitions. [2021-11-09 08:35:31,500 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 780 transitions. Word has length 44 [2021-11-09 08:35:31,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:31,500 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 780 transitions. [2021-11-09 08:35:31,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 44 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:31,501 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 780 transitions. [2021-11-09 08:35:31,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 08:35:31,502 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:31,502 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:31,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-11-09 08:35:31,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:31,702 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:31,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:31,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1685351568, now seen corresponding path program 85 times [2021-11-09 08:35:31,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:31,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506030191] [2021-11-09 08:35:31,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:31,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-09 08:35:32,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:32,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506030191] [2021-11-09 08:35:32,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506030191] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:32,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191777360] [2021-11-09 08:35:32,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:35:32,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:32,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:32,202 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:32,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-11-09 08:35:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:34,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-09 08:35:34,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-09 08:35:35,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191777360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:35,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:35:35,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 42 [2021-11-09 08:35:35,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853704734] [2021-11-09 08:35:35,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 08:35:35,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:35,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 08:35:35,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1609, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 08:35:35,197 INFO L87 Difference]: Start difference. First operand 712 states and 780 transitions. Second operand has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-11-09 08:35:36,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:36,820 INFO L93 Difference]: Finished difference Result 780 states and 847 transitions. [2021-11-09 08:35:36,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 08:35:36,820 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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 44 [2021-11-09 08:35:36,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:36,822 INFO L225 Difference]: With dead ends: 780 [2021-11-09 08:35:36,822 INFO L226 Difference]: Without dead ends: 748 [2021-11-09 08:35:36,823 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=318, Invalid=3972, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 08:35:36,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-11-09 08:35:37,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 697. [2021-11-09 08:35:37,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 1.0977011494252873) internal successors, (764), 696 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:37,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 764 transitions. [2021-11-09 08:35:37,200 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 764 transitions. Word has length 44 [2021-11-09 08:35:37,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:37,200 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 764 transitions. [2021-11-09 08:35:37,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2021-11-09 08:35:37,200 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 764 transitions. [2021-11-09 08:35:37,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 08:35:37,201 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:37,201 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:37,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-11-09 08:35:37,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:37,402 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:37,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:37,402 INFO L85 PathProgramCache]: Analyzing trace with hash -2111163216, now seen corresponding path program 86 times [2021-11-09 08:35:37,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:37,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895243230] [2021-11-09 08:35:37,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:37,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-09 08:35:37,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:37,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895243230] [2021-11-09 08:35:37,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895243230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:37,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157181161] [2021-11-09 08:35:37,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:35:37,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:37,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:37,881 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:37,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-11-09 08:35:40,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:35:40,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:40,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 08:35:40,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-09 08:35:40,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157181161] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:40,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:35:40,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 40 [2021-11-09 08:35:40,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147346955] [2021-11-09 08:35:40,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 08:35:40,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:40,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 08:35:40,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1448, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 08:35:40,936 INFO L87 Difference]: Start difference. First operand 697 states and 764 transitions. Second operand has 40 states, 40 states have (on average 1.35) internal successors, (54), 40 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) [2021-11-09 08:35:42,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:42,378 INFO L93 Difference]: Finished difference Result 746 states and 815 transitions. [2021-11-09 08:35:42,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 08:35:42,378 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.35) internal successors, (54), 40 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 44 [2021-11-09 08:35:42,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:42,380 INFO L225 Difference]: With dead ends: 746 [2021-11-09 08:35:42,380 INFO L226 Difference]: Without dead ends: 740 [2021-11-09 08:35:42,381 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=312, Invalid=3470, Unknown=0, NotChecked=0, Total=3782 [2021-11-09 08:35:42,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-11-09 08:35:42,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 711. [2021-11-09 08:35:42,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 1.0985915492957747) internal successors, (780), 710 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:42,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 780 transitions. [2021-11-09 08:35:42,719 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 780 transitions. Word has length 44 [2021-11-09 08:35:42,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:42,719 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 780 transitions. [2021-11-09 08:35:42,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.35) internal successors, (54), 40 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) [2021-11-09 08:35:42,720 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 780 transitions. [2021-11-09 08:35:42,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 08:35:42,721 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:42,721 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:42,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-11-09 08:35:42,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:42,922 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:42,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:42,922 INFO L85 PathProgramCache]: Analyzing trace with hash 627664406, now seen corresponding path program 87 times [2021-11-09 08:35:42,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:42,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066000387] [2021-11-09 08:35:42,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:42,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:43,446 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:35:43,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:43,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066000387] [2021-11-09 08:35:43,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066000387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:43,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827290000] [2021-11-09 08:35:43,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:35:43,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:43,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:43,447 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:43,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-11-09 08:35:45,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-09 08:35:45,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:45,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 08:35:45,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:46,893 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:35:46,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827290000] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:46,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:35:46,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 51 [2021-11-09 08:35:46,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386112931] [2021-11-09 08:35:46,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-09 08:35:46,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:46,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-09 08:35:46,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=2427, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 08:35:46,895 INFO L87 Difference]: Start difference. First operand 711 states and 780 transitions. Second operand has 51 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 51 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:56,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:56,027 INFO L93 Difference]: Finished difference Result 1257 states and 1344 transitions. [2021-11-09 08:35:56,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-11-09 08:35:56,028 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 51 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 08:35:56,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:56,029 INFO L225 Difference]: With dead ends: 1257 [2021-11-09 08:35:56,029 INFO L226 Difference]: Without dead ends: 1207 [2021-11-09 08:35:56,031 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5827 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=4571, Invalid=20869, Unknown=0, NotChecked=0, Total=25440 [2021-11-09 08:35:56,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-11-09 08:35:56,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 778. [2021-11-09 08:35:56,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 1.0978120978120978) internal successors, (853), 777 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:56,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 853 transitions. [2021-11-09 08:35:56,452 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 853 transitions. Word has length 45 [2021-11-09 08:35:56,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:56,452 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 853 transitions. [2021-11-09 08:35:56,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 51 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:56,452 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 853 transitions. [2021-11-09 08:35:56,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 08:35:56,455 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:56,455 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:56,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:56,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:56,674 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:56,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:56,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1889550089, now seen corresponding path program 88 times [2021-11-09 08:35:56,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:56,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165222308] [2021-11-09 08:35:56,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:56,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:35:57,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:57,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165222308] [2021-11-09 08:35:57,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165222308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:57,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928073646] [2021-11-09 08:35:57,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:35:57,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:57,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:57,394 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:57,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-11-09 08:35:59,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:35:59,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:59,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 08:35:59,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:36:01,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928073646] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:01,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:36:01,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 52 [2021-11-09 08:36:01,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073588013] [2021-11-09 08:36:01,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-09 08:36:01,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:01,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-09 08:36:01,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2526, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 08:36:01,135 INFO L87 Difference]: Start difference. First operand 778 states and 853 transitions. Second operand has 52 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 52 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) [2021-11-09 08:36:04,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:04,458 INFO L93 Difference]: Finished difference Result 1238 states and 1319 transitions. [2021-11-09 08:36:04,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 08:36:04,458 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 52 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 45 [2021-11-09 08:36:04,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:04,460 INFO L225 Difference]: With dead ends: 1238 [2021-11-09 08:36:04,460 INFO L226 Difference]: Without dead ends: 1213 [2021-11-09 08:36:04,460 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=302, Invalid=3858, Unknown=0, NotChecked=0, Total=4160 [2021-11-09 08:36:04,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-11-09 08:36:04,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 784. [2021-11-09 08:36:04,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 1.0970625798212006) internal successors, (859), 783 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:04,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 859 transitions. [2021-11-09 08:36:04,841 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 859 transitions. Word has length 45 [2021-11-09 08:36:04,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:04,841 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 859 transitions. [2021-11-09 08:36:04,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 52 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) [2021-11-09 08:36:04,841 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 859 transitions. [2021-11-09 08:36:04,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 08:36:04,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:04,843 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:04,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-11-09 08:36:05,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:05,044 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:05,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:05,044 INFO L85 PathProgramCache]: Analyzing trace with hash 579713141, now seen corresponding path program 89 times [2021-11-09 08:36:05,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:05,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189846020] [2021-11-09 08:36:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:05,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-09 08:36:05,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:05,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189846020] [2021-11-09 08:36:05,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189846020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:05,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744829507] [2021-11-09 08:36:05,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:36:05,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:05,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:05,191 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:05,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-11-09 08:36:07,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 08:36:07,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:07,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 08:36:07,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-09 08:36:07,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744829507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:07,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:36:07,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2021-11-09 08:36:07,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114803469] [2021-11-09 08:36:07,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 08:36:07,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:07,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 08:36:07,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:36:07,381 INFO L87 Difference]: Start difference. First operand 784 states and 859 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:08,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:08,390 INFO L93 Difference]: Finished difference Result 897 states and 981 transitions. [2021-11-09 08:36:08,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 08:36:08,391 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 08:36:08,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:08,392 INFO L225 Difference]: With dead ends: 897 [2021-11-09 08:36:08,392 INFO L226 Difference]: Without dead ends: 880 [2021-11-09 08:36:08,393 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=459, Invalid=1433, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 08:36:08,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-11-09 08:36:08,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 824. [2021-11-09 08:36:08,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 1.1081409477521265) internal successors, (912), 823 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:08,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 912 transitions. [2021-11-09 08:36:08,819 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 912 transitions. Word has length 45 [2021-11-09 08:36:08,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:08,819 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 912 transitions. [2021-11-09 08:36:08,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:08,820 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 912 transitions. [2021-11-09 08:36:08,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 08:36:08,822 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:08,822 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:08,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-11-09 08:36:09,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-11-09 08:36:09,025 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:09,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:09,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1406048364, now seen corresponding path program 90 times [2021-11-09 08:36:09,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:09,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961383854] [2021-11-09 08:36:09,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:09,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-09 08:36:09,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:09,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961383854] [2021-11-09 08:36:09,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961383854] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:09,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186762090] [2021-11-09 08:36:09,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:36:09,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:09,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:09,172 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:09,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-11-09 08:36:11,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 08:36:11,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:11,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 08:36:11,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-09 08:36:11,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186762090] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:11,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:36:11,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2021-11-09 08:36:11,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427089625] [2021-11-09 08:36:11,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 08:36:11,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:11,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 08:36:11,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:36:11,712 INFO L87 Difference]: Start difference. First operand 824 states and 912 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:12,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:12,951 INFO L93 Difference]: Finished difference Result 1384 states and 1555 transitions. [2021-11-09 08:36:12,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 08:36:12,951 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 08:36:12,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:12,953 INFO L225 Difference]: With dead ends: 1384 [2021-11-09 08:36:12,953 INFO L226 Difference]: Without dead ends: 1180 [2021-11-09 08:36:12,954 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=459, Invalid=1433, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 08:36:12,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-11-09 08:36:13,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 934. [2021-11-09 08:36:13,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 1.1093247588424437) internal successors, (1035), 933 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:13,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1035 transitions. [2021-11-09 08:36:13,447 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1035 transitions. Word has length 45 [2021-11-09 08:36:13,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:13,447 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1035 transitions. [2021-11-09 08:36:13,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:13,447 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1035 transitions. [2021-11-09 08:36:13,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 08:36:13,448 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:13,448 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:13,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-11-09 08:36:13,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:13,649 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:13,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:13,650 INFO L85 PathProgramCache]: Analyzing trace with hash -2078840465, now seen corresponding path program 91 times [2021-11-09 08:36:13,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:13,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942036543] [2021-11-09 08:36:13,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:13,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:13,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:36:14,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:14,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942036543] [2021-11-09 08:36:14,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942036543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:14,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265988447] [2021-11-09 08:36:14,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:36:14,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:14,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:14,558 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:14,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-11-09 08:36:16,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:16,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-09 08:36:16,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:36:17,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265988447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:17,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:36:17,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 53 [2021-11-09 08:36:17,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156293897] [2021-11-09 08:36:17,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-09 08:36:17,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:17,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-09 08:36:17,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=2632, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 08:36:17,921 INFO L87 Difference]: Start difference. First operand 934 states and 1035 transitions. Second operand has 53 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 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) [2021-11-09 08:36:22,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:22,326 INFO L93 Difference]: Finished difference Result 1692 states and 1809 transitions. [2021-11-09 08:36:22,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-09 08:36:22,326 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 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 46 [2021-11-09 08:36:22,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:22,328 INFO L225 Difference]: With dead ends: 1692 [2021-11-09 08:36:22,329 INFO L226 Difference]: Without dead ends: 1683 [2021-11-09 08:36:22,329 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=384, Invalid=7272, Unknown=0, NotChecked=0, Total=7656 [2021-11-09 08:36:22,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-11-09 08:36:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 943. [2021-11-09 08:36:22,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 1.1093418259023355) internal successors, (1045), 942 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:22,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1045 transitions. [2021-11-09 08:36:22,837 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1045 transitions. Word has length 46 [2021-11-09 08:36:22,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:22,838 INFO L470 AbstractCegarLoop]: Abstraction has 943 states and 1045 transitions. [2021-11-09 08:36:22,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 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) [2021-11-09 08:36:22,838 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1045 transitions. [2021-11-09 08:36:22,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 08:36:22,840 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:22,840 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:22,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:23,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-11-09 08:36:23,066 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:23,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:23,066 INFO L85 PathProgramCache]: Analyzing trace with hash 2111321103, now seen corresponding path program 92 times [2021-11-09 08:36:23,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:23,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725336835] [2021-11-09 08:36:23,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:23,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:36:23,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:23,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725336835] [2021-11-09 08:36:23,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725336835] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:23,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629964798] [2021-11-09 08:36:23,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:36:23,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:23,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:23,926 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:23,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-11-09 08:36:26,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:36:26,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:26,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-09 08:36:26,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:27,266 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:36:27,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629964798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:27,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:36:27,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 51 [2021-11-09 08:36:27,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534710800] [2021-11-09 08:36:27,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-09 08:36:27,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:27,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-09 08:36:27,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=2427, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 08:36:27,268 INFO L87 Difference]: Start difference. First operand 943 states and 1045 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:30,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:30,898 INFO L93 Difference]: Finished difference Result 1460 states and 1561 transitions. [2021-11-09 08:36:30,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 08:36:30,899 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-09 08:36:30,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:30,901 INFO L225 Difference]: With dead ends: 1460 [2021-11-09 08:36:30,901 INFO L226 Difference]: Without dead ends: 1430 [2021-11-09 08:36:30,902 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=354, Invalid=6452, Unknown=0, NotChecked=0, Total=6806 [2021-11-09 08:36:30,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2021-11-09 08:36:31,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 934. [2021-11-09 08:36:31,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 1.1093247588424437) internal successors, (1035), 933 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:31,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1035 transitions. [2021-11-09 08:36:31,405 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1035 transitions. Word has length 46 [2021-11-09 08:36:31,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:31,405 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1035 transitions. [2021-11-09 08:36:31,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:31,405 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1035 transitions. [2021-11-09 08:36:31,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 08:36:31,406 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:31,406 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:31,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-11-09 08:36:31,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-11-09 08:36:31,607 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:31,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:31,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1796342545, now seen corresponding path program 93 times [2021-11-09 08:36:31,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:31,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040063189] [2021-11-09 08:36:31,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:31,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:36:32,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:32,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040063189] [2021-11-09 08:36:32,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040063189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:32,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209755245] [2021-11-09 08:36:32,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:36:32,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:32,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:32,345 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:32,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-11-09 08:36:34,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 08:36:34,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:34,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-09 08:36:34,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:36:35,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209755245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:35,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:36:35,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 49 [2021-11-09 08:36:35,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740726922] [2021-11-09 08:36:35,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-09 08:36:35,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:35,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-09 08:36:35,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2230, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 08:36:35,723 INFO L87 Difference]: Start difference. First operand 934 states and 1035 transitions. Second operand has 49 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 49 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:39,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:39,026 INFO L93 Difference]: Finished difference Result 1285 states and 1385 transitions. [2021-11-09 08:36:39,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-09 08:36:39,026 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 49 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-09 08:36:39,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:39,029 INFO L225 Difference]: With dead ends: 1285 [2021-11-09 08:36:39,029 INFO L226 Difference]: Without dead ends: 1254 [2021-11-09 08:36:39,030 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=348, Invalid=5814, Unknown=0, NotChecked=0, Total=6162 [2021-11-09 08:36:39,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-11-09 08:36:39,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 923. [2021-11-09 08:36:39,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 1.1095444685466378) internal successors, (1023), 922 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:39,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1023 transitions. [2021-11-09 08:36:39,630 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1023 transitions. Word has length 46 [2021-11-09 08:36:39,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:39,631 INFO L470 AbstractCegarLoop]: Abstraction has 923 states and 1023 transitions. [2021-11-09 08:36:39,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 49 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:39,631 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1023 transitions. [2021-11-09 08:36:39,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 08:36:39,632 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:39,633 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:39,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:39,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-11-09 08:36:39,842 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:39,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:39,842 INFO L85 PathProgramCache]: Analyzing trace with hash -479321969, now seen corresponding path program 94 times [2021-11-09 08:36:39,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:39,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691584952] [2021-11-09 08:36:39,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:39,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 08:36:40,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:40,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691584952] [2021-11-09 08:36:40,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691584952] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:40,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236070049] [2021-11-09 08:36:40,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:36:40,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:40,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:40,452 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:40,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-11-09 08:36:42,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:36:42,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:42,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-09 08:36:42,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 08:36:43,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236070049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:43,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:36:43,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 47 [2021-11-09 08:36:43,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600116121] [2021-11-09 08:36:43,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-09 08:36:43,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:43,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-09 08:36:43,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2041, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 08:36:43,832 INFO L87 Difference]: Start difference. First operand 923 states and 1023 transitions. Second operand has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:46,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:46,598 INFO L93 Difference]: Finished difference Result 1149 states and 1248 transitions. [2021-11-09 08:36:46,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 08:36:46,598 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-09 08:36:46,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:46,600 INFO L225 Difference]: With dead ends: 1149 [2021-11-09 08:36:46,600 INFO L226 Difference]: Without dead ends: 1117 [2021-11-09 08:36:46,601 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=342, Invalid=5208, Unknown=0, NotChecked=0, Total=5550 [2021-11-09 08:36:46,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-11-09 08:36:47,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 910. [2021-11-09 08:36:47,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 1.11001100110011) internal successors, (1009), 909 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:47,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1009 transitions. [2021-11-09 08:36:47,049 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1009 transitions. Word has length 46 [2021-11-09 08:36:47,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:47,049 INFO L470 AbstractCegarLoop]: Abstraction has 910 states and 1009 transitions. [2021-11-09 08:36:47,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:47,049 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1009 transitions. [2021-11-09 08:36:47,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 08:36:47,050 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:47,050 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:47,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:47,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:47,251 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:47,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:47,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1560702865, now seen corresponding path program 95 times [2021-11-09 08:36:47,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:47,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753921180] [2021-11-09 08:36:47,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:47,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-09 08:36:47,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:47,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753921180] [2021-11-09 08:36:47,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753921180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:47,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192823823] [2021-11-09 08:36:47,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:36:47,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:47,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:47,822 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:47,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-11-09 08:36:50,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 08:36:50,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:50,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-09 08:36:50,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-09 08:36:51,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192823823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:51,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:36:51,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 45 [2021-11-09 08:36:51,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761613514] [2021-11-09 08:36:51,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-09 08:36:51,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:51,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-09 08:36:51,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1860, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 08:36:51,293 INFO L87 Difference]: Start difference. First operand 910 states and 1009 transitions. Second operand has 45 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:53,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:53,588 INFO L93 Difference]: Finished difference Result 1044 states and 1142 transitions. [2021-11-09 08:36:53,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 08:36:53,588 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-09 08:36:53,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:53,590 INFO L225 Difference]: With dead ends: 1044 [2021-11-09 08:36:53,590 INFO L226 Difference]: Without dead ends: 1011 [2021-11-09 08:36:53,590 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=336, Invalid=4634, Unknown=0, NotChecked=0, Total=4970 [2021-11-09 08:36:53,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-11-09 08:36:54,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 895. [2021-11-09 08:36:54,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 1.110738255033557) internal successors, (993), 894 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:54,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 993 transitions. [2021-11-09 08:36:54,022 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 993 transitions. Word has length 46 [2021-11-09 08:36:54,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:54,023 INFO L470 AbstractCegarLoop]: Abstraction has 895 states and 993 transitions. [2021-11-09 08:36:54,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:54,023 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 993 transitions. [2021-11-09 08:36:54,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 08:36:54,024 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:54,024 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:54,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:54,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-11-09 08:36:54,225 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:54,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:54,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1236184286, now seen corresponding path program 96 times [2021-11-09 08:36:54,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:54,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420319832] [2021-11-09 08:36:54,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:54,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 43 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-09 08:36:54,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:54,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420319832] [2021-11-09 08:36:54,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420319832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:54,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498771304] [2021-11-09 08:36:54,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:36:54,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:54,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:54,499 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:54,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-11-09 08:36:56,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 08:36:56,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:56,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 08:36:56,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:57,522 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-09 08:36:57,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498771304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:57,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:36:57,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-11-09 08:36:57,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412060212] [2021-11-09 08:36:57,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 08:36:57,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:57,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 08:36:57,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2021-11-09 08:36:57,524 INFO L87 Difference]: Start difference. First operand 895 states and 993 transitions. Second operand has 32 states, 32 states have (on average 1.625) internal successors, (52), 32 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) [2021-11-09 08:37:00,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:00,320 INFO L93 Difference]: Finished difference Result 1147 states and 1264 transitions. [2021-11-09 08:37:00,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-09 08:37:00,320 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.625) internal successors, (52), 32 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 46 [2021-11-09 08:37:00,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:00,322 INFO L225 Difference]: With dead ends: 1147 [2021-11-09 08:37:00,323 INFO L226 Difference]: Without dead ends: 1075 [2021-11-09 08:37:00,324 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1102, Invalid=4598, Unknown=0, NotChecked=0, Total=5700 [2021-11-09 08:37:00,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-11-09 08:37:01,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 986. [2021-11-09 08:37:01,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 1.099492385786802) internal successors, (1083), 985 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:01,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1083 transitions. [2021-11-09 08:37:01,013 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1083 transitions. Word has length 46 [2021-11-09 08:37:01,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:01,013 INFO L470 AbstractCegarLoop]: Abstraction has 986 states and 1083 transitions. [2021-11-09 08:37:01,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.625) internal successors, (52), 32 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) [2021-11-09 08:37:01,013 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1083 transitions. [2021-11-09 08:37:01,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 08:37:01,014 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:01,014 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:01,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-11-09 08:37:01,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:01,215 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:01,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:01,215 INFO L85 PathProgramCache]: Analyzing trace with hash 833817871, now seen corresponding path program 97 times [2021-11-09 08:37:01,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:01,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84850591] [2021-11-09 08:37:01,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:01,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-09 08:37:01,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:01,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84850591] [2021-11-09 08:37:01,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84850591] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:01,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968419759] [2021-11-09 08:37:01,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:37:01,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:01,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:01,715 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:01,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-11-09 08:37:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:04,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-09 08:37:04,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-09 08:37:05,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968419759] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:05,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:37:05,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 43 [2021-11-09 08:37:05,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511649882] [2021-11-09 08:37:05,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-09 08:37:05,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:05,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-09 08:37:05,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1687, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 08:37:05,098 INFO L87 Difference]: Start difference. First operand 986 states and 1083 transitions. Second operand has 43 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:07,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:07,104 INFO L93 Difference]: Finished difference Result 1086 states and 1186 transitions. [2021-11-09 08:37:07,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 08:37:07,104 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-09 08:37:07,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:07,107 INFO L225 Difference]: With dead ends: 1086 [2021-11-09 08:37:07,107 INFO L226 Difference]: Without dead ends: 1052 [2021-11-09 08:37:07,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=330, Invalid=4092, Unknown=0, NotChecked=0, Total=4422 [2021-11-09 08:37:07,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-11-09 08:37:07,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 981. [2021-11-09 08:37:07,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 1.1010204081632653) internal successors, (1079), 980 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:07,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1079 transitions. [2021-11-09 08:37:07,731 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1079 transitions. Word has length 46 [2021-11-09 08:37:07,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:07,731 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 1079 transitions. [2021-11-09 08:37:07,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:07,731 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1079 transitions. [2021-11-09 08:37:07,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 08:37:07,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:07,732 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:07,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-11-09 08:37:07,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-11-09 08:37:07,933 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:07,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:07,933 INFO L85 PathProgramCache]: Analyzing trace with hash -175659490, now seen corresponding path program 98 times [2021-11-09 08:37:07,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:07,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524671436] [2021-11-09 08:37:07,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:07,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:07,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-09 08:37:08,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:08,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524671436] [2021-11-09 08:37:08,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524671436] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:08,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417173776] [2021-11-09 08:37:08,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:37:08,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:08,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:08,237 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:08,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-11-09 08:37:10,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:37:10,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:37:10,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 08:37:10,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:11,301 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-09 08:37:11,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417173776] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:11,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:37:11,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-11-09 08:37:11,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869456345] [2021-11-09 08:37:11,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 08:37:11,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:11,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 08:37:11,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=976, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 08:37:11,303 INFO L87 Difference]: Start difference. First operand 981 states and 1079 transitions. Second operand has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:12,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:12,815 INFO L93 Difference]: Finished difference Result 1076 states and 1168 transitions. [2021-11-09 08:37:12,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:37:12,815 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-09 08:37:12,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:12,817 INFO L225 Difference]: With dead ends: 1076 [2021-11-09 08:37:12,817 INFO L226 Difference]: Without dead ends: 1037 [2021-11-09 08:37:12,817 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 08:37:12,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-11-09 08:37:13,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 981. [2021-11-09 08:37:13,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 1.0887755102040817) internal successors, (1067), 980 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:13,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1067 transitions. [2021-11-09 08:37:13,314 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1067 transitions. Word has length 46 [2021-11-09 08:37:13,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:13,314 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 1067 transitions. [2021-11-09 08:37:13,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:13,315 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1067 transitions. [2021-11-09 08:37:13,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 08:37:13,316 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:13,316 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:13,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-11-09 08:37:13,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-11-09 08:37:13,517 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:13,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:13,517 INFO L85 PathProgramCache]: Analyzing trace with hash 643092471, now seen corresponding path program 99 times [2021-11-09 08:37:13,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:13,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72628412] [2021-11-09 08:37:13,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:13,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:37:14,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:14,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72628412] [2021-11-09 08:37:14,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72628412] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:14,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128060283] [2021-11-09 08:37:14,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:37:14,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:14,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:14,098 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:14,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-11-09 08:37:16,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 08:37:16,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:37:16,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 08:37:16,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:18,055 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:37:18,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128060283] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:18,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:37:18,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 55 [2021-11-09 08:37:18,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718104082] [2021-11-09 08:37:18,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-09 08:37:18,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:18,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-09 08:37:18,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2837, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 08:37:18,057 INFO L87 Difference]: Start difference. First operand 981 states and 1067 transitions. Second operand has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 55 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) [2021-11-09 08:37:29,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:29,655 INFO L93 Difference]: Finished difference Result 1701 states and 1808 transitions. [2021-11-09 08:37:29,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-11-09 08:37:29,656 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 55 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 47 [2021-11-09 08:37:29,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:29,658 INFO L225 Difference]: With dead ends: 1701 [2021-11-09 08:37:29,658 INFO L226 Difference]: Without dead ends: 1647 [2021-11-09 08:37:29,659 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7604 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=5749, Invalid=26471, Unknown=0, NotChecked=0, Total=32220 [2021-11-09 08:37:29,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-11-09 08:37:30,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1068. [2021-11-09 08:37:30,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 1.0880974695407686) internal successors, (1161), 1067 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:30,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1161 transitions. [2021-11-09 08:37:30,301 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1161 transitions. Word has length 47 [2021-11-09 08:37:30,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:30,301 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 1161 transitions. [2021-11-09 08:37:30,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 55 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) [2021-11-09 08:37:30,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1161 transitions. [2021-11-09 08:37:30,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 08:37:30,302 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:30,303 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:30,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:30,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:30,503 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:30,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:30,504 INFO L85 PathProgramCache]: Analyzing trace with hash -81145546, now seen corresponding path program 100 times [2021-11-09 08:37:30,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:30,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925240583] [2021-11-09 08:37:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:30,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:37:31,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:31,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925240583] [2021-11-09 08:37:31,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925240583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:31,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863192090] [2021-11-09 08:37:31,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:37:31,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:31,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:31,118 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:31,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-11-09 08:37:33,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:37:33,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:37:33,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 08:37:33,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:37:35,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863192090] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:35,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:37:35,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 56 [2021-11-09 08:37:35,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519920926] [2021-11-09 08:37:35,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-09 08:37:35,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:35,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-09 08:37:35,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2944, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 08:37:35,433 INFO L87 Difference]: Start difference. First operand 1068 states and 1161 transitions. Second operand has 56 states, 56 states have (on average 1.4285714285714286) internal successors, (80), 56 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) [2021-11-09 08:37:39,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:39,984 INFO L93 Difference]: Finished difference Result 1681 states and 1781 transitions. [2021-11-09 08:37:39,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 08:37:39,985 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.4285714285714286) internal successors, (80), 56 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 47 [2021-11-09 08:37:39,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:39,986 INFO L225 Difference]: With dead ends: 1681 [2021-11-09 08:37:39,986 INFO L226 Difference]: Without dead ends: 1654 [2021-11-09 08:37:39,987 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=333, Invalid=4497, Unknown=0, NotChecked=0, Total=4830 [2021-11-09 08:37:39,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2021-11-09 08:37:40,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1075. [2021-11-09 08:37:40,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 1074 states have (on average 1.0875232774674115) internal successors, (1168), 1074 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:40,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 1168 transitions. [2021-11-09 08:37:40,651 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 1168 transitions. Word has length 47 [2021-11-09 08:37:40,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:40,651 INFO L470 AbstractCegarLoop]: Abstraction has 1075 states and 1168 transitions. [2021-11-09 08:37:40,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.4285714285714286) internal successors, (80), 56 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) [2021-11-09 08:37:40,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 1168 transitions. [2021-11-09 08:37:40,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 08:37:40,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:40,653 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:40,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:40,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-11-09 08:37:40,853 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:40,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:40,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1748834856, now seen corresponding path program 101 times [2021-11-09 08:37:40,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:40,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774614030] [2021-11-09 08:37:40,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:40,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-09 08:37:41,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:41,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774614030] [2021-11-09 08:37:41,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774614030] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:41,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717352578] [2021-11-09 08:37:41,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:37:41,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:41,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:41,026 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:41,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-11-09 08:37:43,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 08:37:43,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:37:43,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 08:37:43,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-09 08:37:44,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717352578] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:44,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:37:44,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-11-09 08:37:44,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620249583] [2021-11-09 08:37:44,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 08:37:44,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:44,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 08:37:44,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2021-11-09 08:37:44,034 INFO L87 Difference]: Start difference. First operand 1075 states and 1168 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:45,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:45,294 INFO L93 Difference]: Finished difference Result 1293 states and 1403 transitions. [2021-11-09 08:37:45,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 08:37:45,295 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-09 08:37:45,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:45,296 INFO L225 Difference]: With dead ends: 1293 [2021-11-09 08:37:45,296 INFO L226 Difference]: Without dead ends: 1117 [2021-11-09 08:37:45,296 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 08:37:45,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-11-09 08:37:45,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1061. [2021-11-09 08:37:45,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 1.0849056603773586) internal successors, (1150), 1060 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:45,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1150 transitions. [2021-11-09 08:37:45,938 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1150 transitions. Word has length 47 [2021-11-09 08:37:45,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:45,938 INFO L470 AbstractCegarLoop]: Abstraction has 1061 states and 1150 transitions. [2021-11-09 08:37:45,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:45,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1150 transitions. [2021-11-09 08:37:45,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 08:37:45,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:45,939 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:45,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:46,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:46,142 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:46,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:46,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1303563445, now seen corresponding path program 102 times [2021-11-09 08:37:46,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:46,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323956922] [2021-11-09 08:37:46,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:46,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:46,317 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-09 08:37:46,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:46,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323956922] [2021-11-09 08:37:46,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323956922] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:46,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161309839] [2021-11-09 08:37:46,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:37:46,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:46,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:46,318 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:46,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-11-09 08:37:49,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 08:37:49,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:37:49,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 08:37:49,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-09 08:37:49,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161309839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:49,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:37:49,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-11-09 08:37:49,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317069640] [2021-11-09 08:37:49,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 08:37:49,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:49,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 08:37:49,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2021-11-09 08:37:49,407 INFO L87 Difference]: Start difference. First operand 1061 states and 1150 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:50,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:50,693 INFO L93 Difference]: Finished difference Result 1124 states and 1207 transitions. [2021-11-09 08:37:50,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 08:37:50,693 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-09 08:37:50,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:50,695 INFO L225 Difference]: With dead ends: 1124 [2021-11-09 08:37:50,695 INFO L226 Difference]: Without dead ends: 1118 [2021-11-09 08:37:50,695 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 08:37:50,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2021-11-09 08:37:51,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1062. [2021-11-09 08:37:51,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1061 states have (on average 1.0848256361922715) internal successors, (1151), 1061 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:51,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1151 transitions. [2021-11-09 08:37:51,304 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1151 transitions. Word has length 47 [2021-11-09 08:37:51,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:51,304 INFO L470 AbstractCegarLoop]: Abstraction has 1062 states and 1151 transitions. [2021-11-09 08:37:51,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:51,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1151 transitions. [2021-11-09 08:37:51,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 08:37:51,306 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:51,306 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:51,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-11-09 08:37:51,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:51,507 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:51,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:51,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1852874480, now seen corresponding path program 103 times [2021-11-09 08:37:51,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:51,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209449103] [2021-11-09 08:37:51,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:51,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:37:52,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:52,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209449103] [2021-11-09 08:37:52,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209449103] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:52,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724022744] [2021-11-09 08:37:52,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:37:52,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:52,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:52,453 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:52,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-11-09 08:37:55,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:55,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-09 08:37:55,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:37:56,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724022744] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:56,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:37:56,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 56 [2021-11-09 08:37:56,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7791268] [2021-11-09 08:37:56,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-09 08:37:56,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:56,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-09 08:37:56,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2949, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 08:37:56,468 INFO L87 Difference]: Start difference. First operand 1062 states and 1151 transitions. Second operand has 56 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:01,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:01,894 INFO L93 Difference]: Finished difference Result 1891 states and 1995 transitions. [2021-11-09 08:38:01,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-09 08:38:01,895 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 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 48 [2021-11-09 08:38:01,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:01,896 INFO L225 Difference]: With dead ends: 1891 [2021-11-09 08:38:01,897 INFO L226 Difference]: Without dead ends: 1882 [2021-11-09 08:38:01,897 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1520 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=403, Invalid=8153, Unknown=0, NotChecked=0, Total=8556 [2021-11-09 08:38:01,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2021-11-09 08:38:02,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1071. [2021-11-09 08:38:02,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 1.0850467289719625) internal successors, (1161), 1070 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:02,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1161 transitions. [2021-11-09 08:38:02,619 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1161 transitions. Word has length 48 [2021-11-09 08:38:02,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:02,619 INFO L470 AbstractCegarLoop]: Abstraction has 1071 states and 1161 transitions. [2021-11-09 08:38:02,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:02,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1161 transitions. [2021-11-09 08:38:02,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 08:38:02,620 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:02,620 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:02,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-11-09 08:38:02,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-11-09 08:38:02,821 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:02,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:02,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1196812848, now seen corresponding path program 104 times [2021-11-09 08:38:02,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:02,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990448663] [2021-11-09 08:38:02,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:02,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:38:03,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:03,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990448663] [2021-11-09 08:38:03,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990448663] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:03,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911678672] [2021-11-09 08:38:03,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:38:03,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:03,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:03,696 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:03,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-11-09 08:38:06,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:38:06,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:38:06,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-09 08:38:06,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:38:07,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911678672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:07,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:38:07,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 54 [2021-11-09 08:38:07,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535770449] [2021-11-09 08:38:07,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-09 08:38:07,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:07,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-09 08:38:07,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2732, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 08:38:07,726 INFO L87 Difference]: Start difference. First operand 1071 states and 1161 transitions. Second operand has 54 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 54 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) [2021-11-09 08:38:12,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:12,084 INFO L93 Difference]: Finished difference Result 1640 states and 1729 transitions. [2021-11-09 08:38:12,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-09 08:38:12,084 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 54 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 48 [2021-11-09 08:38:12,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:12,086 INFO L225 Difference]: With dead ends: 1640 [2021-11-09 08:38:12,086 INFO L226 Difference]: Without dead ends: 1609 [2021-11-09 08:38:12,087 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=372, Invalid=7284, Unknown=0, NotChecked=0, Total=7656 [2021-11-09 08:38:12,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-11-09 08:38:12,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1062. [2021-11-09 08:38:12,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1061 states have (on average 1.0848256361922715) internal successors, (1151), 1061 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:12,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1151 transitions. [2021-11-09 08:38:12,681 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1151 transitions. Word has length 48 [2021-11-09 08:38:12,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:12,681 INFO L470 AbstractCegarLoop]: Abstraction has 1062 states and 1151 transitions. [2021-11-09 08:38:12,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 54 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) [2021-11-09 08:38:12,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1151 transitions. [2021-11-09 08:38:12,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 08:38:12,683 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:12,683 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:12,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:12,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-11-09 08:38:12,886 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:12,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:12,886 INFO L85 PathProgramCache]: Analyzing trace with hash -976379632, now seen corresponding path program 105 times [2021-11-09 08:38:12,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:12,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275623380] [2021-11-09 08:38:12,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:12,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:38:13,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:13,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275623380] [2021-11-09 08:38:13,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275623380] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:13,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874756111] [2021-11-09 08:38:13,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:38:13,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:13,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:13,671 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:13,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-11-09 08:38:16,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 08:38:16,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:38:16,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-09 08:38:16,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:17,667 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:38:17,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874756111] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:17,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:38:17,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 52 [2021-11-09 08:38:17,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981421880] [2021-11-09 08:38:17,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-09 08:38:17,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:17,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-09 08:38:17,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2523, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 08:38:17,669 INFO L87 Difference]: Start difference. First operand 1062 states and 1151 transitions. Second operand has 52 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 52 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) [2021-11-09 08:38:21,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:21,440 INFO L93 Difference]: Finished difference Result 1452 states and 1540 transitions. [2021-11-09 08:38:21,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-09 08:38:21,440 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 52 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 48 [2021-11-09 08:38:21,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:21,442 INFO L225 Difference]: With dead ends: 1452 [2021-11-09 08:38:21,442 INFO L226 Difference]: Without dead ends: 1420 [2021-11-09 08:38:21,443 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=366, Invalid=6606, Unknown=0, NotChecked=0, Total=6972 [2021-11-09 08:38:21,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-11-09 08:38:22,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1051. [2021-11-09 08:38:22,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1050 states have (on average 1.0847619047619048) internal successors, (1139), 1050 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:22,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1139 transitions. [2021-11-09 08:38:22,072 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1139 transitions. Word has length 48 [2021-11-09 08:38:22,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:22,072 INFO L470 AbstractCegarLoop]: Abstraction has 1051 states and 1139 transitions. [2021-11-09 08:38:22,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 52 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) [2021-11-09 08:38:22,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1139 transitions. [2021-11-09 08:38:22,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 08:38:22,073 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:22,074 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:22,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-11-09 08:38:22,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-11-09 08:38:22,276 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:22,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:22,277 INFO L85 PathProgramCache]: Analyzing trace with hash -56699440, now seen corresponding path program 106 times [2021-11-09 08:38:22,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:22,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689057459] [2021-11-09 08:38:22,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:22,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 08:38:22,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:22,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689057459] [2021-11-09 08:38:22,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689057459] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:22,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414593042] [2021-11-09 08:38:22,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:38:22,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:22,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:22,970 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:22,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-11-09 08:38:25,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:38:25,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:38:25,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-09 08:38:25,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 08:38:27,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414593042] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:27,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:38:27,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 50 [2021-11-09 08:38:27,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447934268] [2021-11-09 08:38:27,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-09 08:38:27,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:27,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-09 08:38:27,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2322, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 08:38:27,066 INFO L87 Difference]: Start difference. First operand 1051 states and 1139 transitions. Second operand has 50 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:30,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:30,503 INFO L93 Difference]: Finished difference Result 1305 states and 1392 transitions. [2021-11-09 08:38:30,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 08:38:30,504 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-09 08:38:30,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:30,505 INFO L225 Difference]: With dead ends: 1305 [2021-11-09 08:38:30,505 INFO L226 Difference]: Without dead ends: 1272 [2021-11-09 08:38:30,506 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=360, Invalid=5960, Unknown=0, NotChecked=0, Total=6320 [2021-11-09 08:38:30,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-11-09 08:38:31,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1038. [2021-11-09 08:38:31,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1037 states have (on average 1.0848601735776278) internal successors, (1125), 1037 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:31,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1125 transitions. [2021-11-09 08:38:31,149 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1125 transitions. Word has length 48 [2021-11-09 08:38:31,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:31,149 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 1125 transitions. [2021-11-09 08:38:31,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:31,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1125 transitions. [2021-11-09 08:38:31,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 08:38:31,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:31,151 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:31,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-11-09 08:38:31,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-11-09 08:38:31,351 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:31,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:31,352 INFO L85 PathProgramCache]: Analyzing trace with hash -693772016, now seen corresponding path program 107 times [2021-11-09 08:38:31,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:31,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576824711] [2021-11-09 08:38:31,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:31,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-09 08:38:32,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:32,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576824711] [2021-11-09 08:38:32,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576824711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:32,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493718540] [2021-11-09 08:38:32,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:38:32,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:32,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:32,016 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:32,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-11-09 08:38:34,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 08:38:34,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:38:34,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-09 08:38:34,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-09 08:38:36,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493718540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:36,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:38:36,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 48 [2021-11-09 08:38:36,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775626911] [2021-11-09 08:38:36,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-09 08:38:36,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:36,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-09 08:38:36,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2129, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 08:38:36,034 INFO L87 Difference]: Start difference. First operand 1038 states and 1125 transitions. Second operand has 48 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 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) [2021-11-09 08:38:38,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:38,975 INFO L93 Difference]: Finished difference Result 1191 states and 1277 transitions. [2021-11-09 08:38:38,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 08:38:38,975 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 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 48 [2021-11-09 08:38:38,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:38,976 INFO L225 Difference]: With dead ends: 1191 [2021-11-09 08:38:38,976 INFO L226 Difference]: Without dead ends: 1157 [2021-11-09 08:38:38,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=354, Invalid=5346, Unknown=0, NotChecked=0, Total=5700 [2021-11-09 08:38:38,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2021-11-09 08:38:39,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1023. [2021-11-09 08:38:39,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.0851272015655578) internal successors, (1109), 1022 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:39,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1109 transitions. [2021-11-09 08:38:39,607 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1109 transitions. Word has length 48 [2021-11-09 08:38:39,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:39,607 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 1109 transitions. [2021-11-09 08:38:39,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 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) [2021-11-09 08:38:39,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1109 transitions. [2021-11-09 08:38:39,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 08:38:39,608 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:39,609 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:39,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-11-09 08:38:39,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-11-09 08:38:39,809 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:39,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:39,810 INFO L85 PathProgramCache]: Analyzing trace with hash 368678352, now seen corresponding path program 108 times [2021-11-09 08:38:39,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:39,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982247076] [2021-11-09 08:38:39,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:39,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:39,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-09 08:38:40,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:40,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982247076] [2021-11-09 08:38:40,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982247076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:40,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061672026] [2021-11-09 08:38:40,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:38:40,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:40,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:40,449 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:40,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-11-09 08:38:43,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-09 08:38:43,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:38:43,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-09 08:38:43,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-09 08:38:44,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061672026] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:44,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:38:44,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 46 [2021-11-09 08:38:44,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698671084] [2021-11-09 08:38:44,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-09 08:38:44,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:44,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-09 08:38:44,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1944, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 08:38:44,483 INFO L87 Difference]: Start difference. First operand 1023 states and 1109 transitions. Second operand has 46 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 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) [2021-11-09 08:38:46,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:46,735 INFO L93 Difference]: Finished difference Result 1095 states and 1180 transitions. [2021-11-09 08:38:46,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 08:38:46,736 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 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 48 [2021-11-09 08:38:46,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:46,737 INFO L225 Difference]: With dead ends: 1095 [2021-11-09 08:38:46,738 INFO L226 Difference]: Without dead ends: 1060 [2021-11-09 08:38:46,738 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=348, Invalid=4764, Unknown=0, NotChecked=0, Total=5112 [2021-11-09 08:38:46,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-11-09 08:38:47,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1006. [2021-11-09 08:38:47,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 1.0855721393034825) internal successors, (1091), 1005 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:47,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1091 transitions. [2021-11-09 08:38:47,396 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1091 transitions. Word has length 48 [2021-11-09 08:38:47,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:47,396 INFO L470 AbstractCegarLoop]: Abstraction has 1006 states and 1091 transitions. [2021-11-09 08:38:47,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 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) [2021-11-09 08:38:47,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1091 transitions. [2021-11-09 08:38:47,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 08:38:47,398 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:47,398 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:47,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-11-09 08:38:47,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:47,598 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:47,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:47,599 INFO L85 PathProgramCache]: Analyzing trace with hash -937942768, now seen corresponding path program 109 times [2021-11-09 08:38:47,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:47,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517089498] [2021-11-09 08:38:47,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:47,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:48,152 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-09 08:38:48,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:48,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517089498] [2021-11-09 08:38:48,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517089498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:48,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371872668] [2021-11-09 08:38:48,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:38:48,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:48,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:48,153 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:48,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-11-09 08:38:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:51,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-09 08:38:51,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-09 08:38:52,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371872668] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:52,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:38:52,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 44 [2021-11-09 08:38:52,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469190331] [2021-11-09 08:38:52,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 08:38:52,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:52,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 08:38:52,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 08:38:52,213 INFO L87 Difference]: Start difference. First operand 1006 states and 1091 transitions. Second operand has 44 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 44 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:53,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:53,948 INFO L93 Difference]: Finished difference Result 1058 states and 1145 transitions. [2021-11-09 08:38:53,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 08:38:53,949 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 44 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-09 08:38:53,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:53,950 INFO L225 Difference]: With dead ends: 1058 [2021-11-09 08:38:53,950 INFO L226 Difference]: Without dead ends: 1052 [2021-11-09 08:38:53,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=342, Invalid=4214, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 08:38:53,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-11-09 08:38:54,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1021. [2021-11-09 08:38:54,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 1.0862745098039215) internal successors, (1108), 1020 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:54,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1108 transitions. [2021-11-09 08:38:54,594 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1108 transitions. Word has length 48 [2021-11-09 08:38:54,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:54,594 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 1108 transitions. [2021-11-09 08:38:54,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 44 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:54,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1108 transitions. [2021-11-09 08:38:54,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 08:38:54,595 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:54,595 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:54,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-11-09 08:38:54,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-11-09 08:38:54,796 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:54,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:54,796 INFO L85 PathProgramCache]: Analyzing trace with hash -941896586, now seen corresponding path program 110 times [2021-11-09 08:38:54,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:54,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622964372] [2021-11-09 08:38:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:54,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:54,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:55,457 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:38:55,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:55,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622964372] [2021-11-09 08:38:55,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622964372] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:55,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929644481] [2021-11-09 08:38:55,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:38:55,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:55,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:55,459 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:55,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-11-09 08:38:58,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:38:58,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:38:58,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 08:38:58,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:39:00,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929644481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:00,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:00,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 59 [2021-11-09 08:39:00,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963885397] [2021-11-09 08:39:00,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-09 08:39:00,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:00,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-09 08:39:00,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=3279, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 08:39:00,194 INFO L87 Difference]: Start difference. First operand 1021 states and 1108 transitions. Second operand has 59 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 59 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) [2021-11-09 08:39:14,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:14,904 INFO L93 Difference]: Finished difference Result 1805 states and 1913 transitions. [2021-11-09 08:39:14,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-11-09 08:39:14,905 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 59 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-09 08:39:14,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:14,906 INFO L225 Difference]: With dead ends: 1805 [2021-11-09 08:39:14,906 INFO L226 Difference]: Without dead ends: 1749 [2021-11-09 08:39:14,908 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9743 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=7130, Invalid=33070, Unknown=0, NotChecked=0, Total=40200 [2021-11-09 08:39:14,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2021-11-09 08:39:15,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1109. [2021-11-09 08:39:15,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 1108 states have (on average 1.0857400722021662) internal successors, (1203), 1108 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:15,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1203 transitions. [2021-11-09 08:39:15,572 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1203 transitions. Word has length 49 [2021-11-09 08:39:15,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:15,573 INFO L470 AbstractCegarLoop]: Abstraction has 1109 states and 1203 transitions. [2021-11-09 08:39:15,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 59 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) [2021-11-09 08:39:15,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1203 transitions. [2021-11-09 08:39:15,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 08:39:15,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:15,575 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:15,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-11-09 08:39:15,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:15,778 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:15,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:15,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1918438633, now seen corresponding path program 111 times [2021-11-09 08:39:15,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:15,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667087352] [2021-11-09 08:39:15,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:15,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:39:16,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:16,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667087352] [2021-11-09 08:39:16,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667087352] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:16,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877133017] [2021-11-09 08:39:16,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:39:16,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:16,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:16,484 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:16,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-11-09 08:39:19,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 08:39:19,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:39:19,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 08:39:19,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:39:21,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877133017] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:21,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:21,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 60 [2021-11-09 08:39:21,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748349734] [2021-11-09 08:39:21,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-09 08:39:21,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:21,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-09 08:39:21,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=3394, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 08:39:21,516 INFO L87 Difference]: Start difference. First operand 1109 states and 1203 transitions. Second operand has 60 states, 60 states have (on average 1.4) internal successors, (84), 60 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) [2021-11-09 08:39:26,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:26,864 INFO L93 Difference]: Finished difference Result 1784 states and 1885 transitions. [2021-11-09 08:39:26,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 08:39:26,864 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.4) internal successors, (84), 60 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 49 [2021-11-09 08:39:26,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:26,866 INFO L225 Difference]: With dead ends: 1784 [2021-11-09 08:39:26,866 INFO L226 Difference]: Without dead ends: 1756 [2021-11-09 08:39:26,867 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=365, Invalid=5185, Unknown=0, NotChecked=0, Total=5550 [2021-11-09 08:39:26,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-11-09 08:39:27,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1116. [2021-11-09 08:39:27,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 1.0852017937219731) internal successors, (1210), 1115 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:27,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1210 transitions. [2021-11-09 08:39:27,554 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1210 transitions. Word has length 49 [2021-11-09 08:39:27,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:27,554 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 1210 transitions. [2021-11-09 08:39:27,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.4) internal successors, (84), 60 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) [2021-11-09 08:39:27,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1210 transitions. [2021-11-09 08:39:27,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 08:39:27,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:27,555 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:27,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-11-09 08:39:27,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:27,756 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:27,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:27,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1705158635, now seen corresponding path program 112 times [2021-11-09 08:39:27,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:27,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388640373] [2021-11-09 08:39:27,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:27,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-09 08:39:27,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:27,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388640373] [2021-11-09 08:39:27,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388640373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:27,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775300498] [2021-11-09 08:39:27,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:39:27,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:27,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:27,943 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:27,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-11-09 08:39:31,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:39:31,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:39:31,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 08:39:31,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-09 08:39:31,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775300498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:31,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:31,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-11-09 08:39:31,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935058240] [2021-11-09 08:39:31,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 08:39:31,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:31,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 08:39:31,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-11-09 08:39:31,414 INFO L87 Difference]: Start difference. First operand 1116 states and 1210 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 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) [2021-11-09 08:39:33,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:33,075 INFO L93 Difference]: Finished difference Result 1249 states and 1353 transitions. [2021-11-09 08:39:33,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-09 08:39:33,076 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 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 49 [2021-11-09 08:39:33,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:33,077 INFO L225 Difference]: With dead ends: 1249 [2021-11-09 08:39:33,077 INFO L226 Difference]: Without dead ends: 1231 [2021-11-09 08:39:33,078 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=674, Invalid=2188, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 08:39:33,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2021-11-09 08:39:33,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1162. [2021-11-09 08:39:33,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1161 states have (on average 1.0947459086993971) internal successors, (1271), 1161 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:33,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1271 transitions. [2021-11-09 08:39:33,840 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1271 transitions. Word has length 49 [2021-11-09 08:39:33,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:33,840 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 1271 transitions. [2021-11-09 08:39:33,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 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) [2021-11-09 08:39:33,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1271 transitions. [2021-11-09 08:39:33,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 08:39:33,841 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:33,841 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:33,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-11-09 08:39:34,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:34,042 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:34,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:34,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1570091816, now seen corresponding path program 113 times [2021-11-09 08:39:34,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:34,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122650674] [2021-11-09 08:39:34,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:34,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-09 08:39:34,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:34,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122650674] [2021-11-09 08:39:34,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122650674] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:34,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811437156] [2021-11-09 08:39:34,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:39:34,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:34,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:34,213 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:34,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-11-09 08:39:37,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 08:39:37,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:39:37,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 08:39:37,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-09 08:39:37,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811437156] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:37,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:37,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-11-09 08:39:37,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875289529] [2021-11-09 08:39:37,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 08:39:37,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:37,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 08:39:37,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-11-09 08:39:37,624 INFO L87 Difference]: Start difference. First operand 1162 states and 1271 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 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) [2021-11-09 08:39:39,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:39,747 INFO L93 Difference]: Finished difference Result 1857 states and 2062 transitions. [2021-11-09 08:39:39,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-09 08:39:39,748 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 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 49 [2021-11-09 08:39:39,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:39,749 INFO L225 Difference]: With dead ends: 1857 [2021-11-09 08:39:39,749 INFO L226 Difference]: Without dead ends: 1607 [2021-11-09 08:39:39,750 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=674, Invalid=2188, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 08:39:39,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-11-09 08:39:40,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1304. [2021-11-09 08:39:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 1.0959324635456638) internal successors, (1428), 1303 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:40,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1428 transitions. [2021-11-09 08:39:40,556 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1428 transitions. Word has length 49 [2021-11-09 08:39:40,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:40,556 INFO L470 AbstractCegarLoop]: Abstraction has 1304 states and 1428 transitions. [2021-11-09 08:39:40,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 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) [2021-11-09 08:39:40,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1428 transitions. [2021-11-09 08:39:40,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 08:39:40,558 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:40,558 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:40,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-11-09 08:39:40,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-11-09 08:39:40,759 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:40,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:40,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1320581967, now seen corresponding path program 114 times [2021-11-09 08:39:40,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:40,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23367144] [2021-11-09 08:39:40,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:40,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:39:41,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:41,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23367144] [2021-11-09 08:39:41,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23367144] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:41,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285671700] [2021-11-09 08:39:41,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:39:41,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:41,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:41,747 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:41,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-11-09 08:39:44,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-09 08:39:44,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:39:44,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-09 08:39:44,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:39:46,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285671700] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:46,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:46,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 59 [2021-11-09 08:39:46,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581875336] [2021-11-09 08:39:46,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-09 08:39:46,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:46,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-09 08:39:46,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=3284, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 08:39:46,223 INFO L87 Difference]: Start difference. First operand 1304 states and 1428 transitions. Second operand has 59 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 59 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) [2021-11-09 08:39:53,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:53,150 INFO L93 Difference]: Finished difference Result 2358 states and 2500 transitions. [2021-11-09 08:39:53,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-09 08:39:53,150 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 59 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 50 [2021-11-09 08:39:53,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:53,152 INFO L225 Difference]: With dead ends: 2358 [2021-11-09 08:39:53,152 INFO L226 Difference]: Without dead ends: 2349 [2021-11-09 08:39:53,153 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1692 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=422, Invalid=9084, Unknown=0, NotChecked=0, Total=9506 [2021-11-09 08:39:53,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2021-11-09 08:39:53,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 1313. [2021-11-09 08:39:53,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 1.0960365853658536) internal successors, (1438), 1312 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:53,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 1438 transitions. [2021-11-09 08:39:53,964 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 1438 transitions. Word has length 50 [2021-11-09 08:39:53,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:53,964 INFO L470 AbstractCegarLoop]: Abstraction has 1313 states and 1438 transitions. [2021-11-09 08:39:53,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 59 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) [2021-11-09 08:39:53,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 1438 transitions. [2021-11-09 08:39:53,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 08:39:53,966 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:53,966 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:54,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-11-09 08:39:54,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-11-09 08:39:54,166 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:54,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:54,167 INFO L85 PathProgramCache]: Analyzing trace with hash -971861649, now seen corresponding path program 115 times [2021-11-09 08:39:54,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:54,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227229847] [2021-11-09 08:39:54,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:54,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:39:55,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:55,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227229847] [2021-11-09 08:39:55,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227229847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:55,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156348813] [2021-11-09 08:39:55,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:39:55,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:55,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:55,107 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:55,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-11-09 08:39:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:58,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-09 08:39:58,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:39:59,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156348813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:59,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:59,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 57 [2021-11-09 08:39:59,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810252840] [2021-11-09 08:39:59,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-09 08:39:59,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:59,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-09 08:39:59,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=3055, Unknown=0, NotChecked=0, Total=3192 [2021-11-09 08:39:59,443 INFO L87 Difference]: Start difference. First operand 1313 states and 1438 transitions. Second operand has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:04,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:04,849 INFO L93 Difference]: Finished difference Result 2070 states and 2194 transitions. [2021-11-09 08:40:04,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-09 08:40:04,850 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-09 08:40:04,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:04,852 INFO L225 Difference]: With dead ends: 2070 [2021-11-09 08:40:04,852 INFO L226 Difference]: Without dead ends: 2038 [2021-11-09 08:40:04,853 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=390, Invalid=8166, Unknown=0, NotChecked=0, Total=8556 [2021-11-09 08:40:04,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2021-11-09 08:40:05,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1304. [2021-11-09 08:40:05,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 1.0959324635456638) internal successors, (1428), 1303 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:05,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1428 transitions. [2021-11-09 08:40:05,648 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1428 transitions. Word has length 50 [2021-11-09 08:40:05,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:05,649 INFO L470 AbstractCegarLoop]: Abstraction has 1304 states and 1428 transitions. [2021-11-09 08:40:05,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:05,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1428 transitions. [2021-11-09 08:40:05,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 08:40:05,650 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:05,650 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:05,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-11-09 08:40:05,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-11-09 08:40:05,851 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:05,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:05,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1931235633, now seen corresponding path program 116 times [2021-11-09 08:40:05,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:05,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59409558] [2021-11-09 08:40:05,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:05,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:05,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:06,684 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:40:06,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:06,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59409558] [2021-11-09 08:40:06,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59409558] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:06,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600960805] [2021-11-09 08:40:06,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:40:06,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:06,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:06,686 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:06,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-11-09 08:40:09,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:40:09,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:40:09,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-09 08:40:09,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:11,341 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:40:11,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600960805] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:11,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:40:11,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 55 [2021-11-09 08:40:11,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988863324] [2021-11-09 08:40:11,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-09 08:40:11,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:11,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-09 08:40:11,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2834, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 08:40:11,343 INFO L87 Difference]: Start difference. First operand 1304 states and 1428 transitions. Second operand has 55 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 55 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:16,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:16,645 INFO L93 Difference]: Finished difference Result 1842 states and 1965 transitions. [2021-11-09 08:40:16,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-09 08:40:16,646 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 55 states have internal predecessors, (69), 0 states have call successors, (0), 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 50 [2021-11-09 08:40:16,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:16,647 INFO L225 Difference]: With dead ends: 1842 [2021-11-09 08:40:16,648 INFO L226 Difference]: Without dead ends: 1809 [2021-11-09 08:40:16,648 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=384, Invalid=7448, Unknown=0, NotChecked=0, Total=7832 [2021-11-09 08:40:16,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2021-11-09 08:40:17,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1293. [2021-11-09 08:40:17,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 1.0959752321981424) internal successors, (1416), 1292 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:17,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 1416 transitions. [2021-11-09 08:40:17,414 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 1416 transitions. Word has length 50 [2021-11-09 08:40:17,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:17,414 INFO L470 AbstractCegarLoop]: Abstraction has 1293 states and 1416 transitions. [2021-11-09 08:40:17,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 55 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:17,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 1416 transitions. [2021-11-09 08:40:17,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 08:40:17,416 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:17,416 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:17,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-11-09 08:40:17,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-11-09 08:40:17,616 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:17,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:17,617 INFO L85 PathProgramCache]: Analyzing trace with hash 515890671, now seen corresponding path program 117 times [2021-11-09 08:40:17,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:17,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694303653] [2021-11-09 08:40:17,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:17,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 08:40:18,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:18,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694303653] [2021-11-09 08:40:18,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694303653] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:18,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875679449] [2021-11-09 08:40:18,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:40:18,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:18,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:18,427 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:18,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-11-09 08:40:21,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 08:40:21,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:40:21,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-09 08:40:21,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:22,942 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 08:40:22,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875679449] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:22,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:40:22,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 53 [2021-11-09 08:40:22,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348658520] [2021-11-09 08:40:22,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-09 08:40:22,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:22,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-09 08:40:22,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2621, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 08:40:22,944 INFO L87 Difference]: Start difference. First operand 1293 states and 1416 transitions. Second operand has 53 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 53 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:27,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:27,578 INFO L93 Difference]: Finished difference Result 1661 states and 1783 transitions. [2021-11-09 08:40:27,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-09 08:40:27,578 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 53 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-09 08:40:27,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:27,580 INFO L225 Difference]: With dead ends: 1661 [2021-11-09 08:40:27,580 INFO L226 Difference]: Without dead ends: 1627 [2021-11-09 08:40:27,580 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=378, Invalid=6762, Unknown=0, NotChecked=0, Total=7140 [2021-11-09 08:40:27,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-11-09 08:40:28,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1280. [2021-11-09 08:40:28,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 1.096168881939015) internal successors, (1402), 1279 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:28,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 1402 transitions. [2021-11-09 08:40:28,348 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 1402 transitions. Word has length 50 [2021-11-09 08:40:28,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:28,348 INFO L470 AbstractCegarLoop]: Abstraction has 1280 states and 1402 transitions. [2021-11-09 08:40:28,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 53 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:28,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 1402 transitions. [2021-11-09 08:40:28,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 08:40:28,350 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:28,350 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:28,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-11-09 08:40:28,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:28,552 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:28,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:28,554 INFO L85 PathProgramCache]: Analyzing trace with hash 2045370959, now seen corresponding path program 118 times [2021-11-09 08:40:28,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:28,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968500027] [2021-11-09 08:40:28,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:28,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:29,258 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-09 08:40:29,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:29,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968500027] [2021-11-09 08:40:29,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968500027] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:29,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337065376] [2021-11-09 08:40:29,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:40:29,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:29,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:29,261 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:29,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-11-09 08:40:32,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:40:32,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:40:32,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-09 08:40:32,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-09 08:40:33,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337065376] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:33,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:40:33,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 51 [2021-11-09 08:40:33,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236449895] [2021-11-09 08:40:33,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-09 08:40:33,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:33,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-09 08:40:33,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2416, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 08:40:33,832 INFO L87 Difference]: Start difference. First operand 1280 states and 1402 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:37,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:37,653 INFO L93 Difference]: Finished difference Result 1519 states and 1640 transitions. [2021-11-09 08:40:37,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-09 08:40:37,654 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-09 08:40:37,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:37,656 INFO L225 Difference]: With dead ends: 1519 [2021-11-09 08:40:37,656 INFO L226 Difference]: Without dead ends: 1484 [2021-11-09 08:40:37,657 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=372, Invalid=6108, Unknown=0, NotChecked=0, Total=6480 [2021-11-09 08:40:37,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2021-11-09 08:40:38,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1265. [2021-11-09 08:40:38,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 1.0965189873417722) internal successors, (1386), 1264 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:38,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 1386 transitions. [2021-11-09 08:40:38,483 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 1386 transitions. Word has length 50 [2021-11-09 08:40:38,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:38,484 INFO L470 AbstractCegarLoop]: Abstraction has 1265 states and 1386 transitions. [2021-11-09 08:40:38,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:38,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 1386 transitions. [2021-11-09 08:40:38,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 08:40:38,486 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:38,486 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:38,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-11-09 08:40:38,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:38,689 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:38,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:38,690 INFO L85 PathProgramCache]: Analyzing trace with hash -2122831249, now seen corresponding path program 119 times [2021-11-09 08:40:38,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:38,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018117891] [2021-11-09 08:40:38,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:38,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-09 08:40:39,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:39,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018117891] [2021-11-09 08:40:39,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018117891] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:39,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415579065] [2021-11-09 08:40:39,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:40:39,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:39,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:39,376 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:39,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-11-09 08:40:42,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 08:40:42,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:40:42,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-09 08:40:42,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-09 08:40:43,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415579065] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:43,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:40:43,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 49 [2021-11-09 08:40:43,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772996608] [2021-11-09 08:40:43,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-09 08:40:43,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:43,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-09 08:40:43,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2219, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 08:40:43,937 INFO L87 Difference]: Start difference. First operand 1265 states and 1386 transitions. Second operand has 49 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 49 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:47,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:47,033 INFO L93 Difference]: Finished difference Result 1408 states and 1528 transitions. [2021-11-09 08:40:47,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 08:40:47,033 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 49 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-09 08:40:47,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:47,035 INFO L225 Difference]: With dead ends: 1408 [2021-11-09 08:40:47,035 INFO L226 Difference]: Without dead ends: 1372 [2021-11-09 08:40:47,036 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=366, Invalid=5486, Unknown=0, NotChecked=0, Total=5852 [2021-11-09 08:40:47,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-11-09 08:40:47,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1248. [2021-11-09 08:40:47,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 1.0970328789093826) internal successors, (1368), 1247 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:47,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1368 transitions. [2021-11-09 08:40:47,837 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1368 transitions. Word has length 50 [2021-11-09 08:40:47,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:47,838 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 1368 transitions. [2021-11-09 08:40:47,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 49 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:47,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1368 transitions. [2021-11-09 08:40:47,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 08:40:47,839 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:47,839 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:47,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-11-09 08:40:48,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-11-09 08:40:48,040 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:48,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:48,040 INFO L85 PathProgramCache]: Analyzing trace with hash -539159010, now seen corresponding path program 120 times [2021-11-09 08:40:48,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:48,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833730764] [2021-11-09 08:40:48,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:48,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-09 08:40:48,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:48,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833730764] [2021-11-09 08:40:48,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833730764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:48,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303916122] [2021-11-09 08:40:48,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:40:48,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:48,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:48,368 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:48,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-11-09 08:40:51,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 08:40:51,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:40:51,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 08:40:51,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-09 08:40:52,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303916122] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:52,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:40:52,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-11-09 08:40:52,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670739152] [2021-11-09 08:40:52,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 08:40:52,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:52,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 08:40:52,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1174, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 08:40:52,515 INFO L87 Difference]: Start difference. First operand 1248 states and 1368 transitions. Second operand has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 36 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) [2021-11-09 08:40:56,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:56,714 INFO L93 Difference]: Finished difference Result 1557 states and 1699 transitions. [2021-11-09 08:40:56,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-09 08:40:56,715 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 36 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 50 [2021-11-09 08:40:56,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:56,716 INFO L225 Difference]: With dead ends: 1557 [2021-11-09 08:40:56,716 INFO L226 Difference]: Without dead ends: 1476 [2021-11-09 08:40:56,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1676 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1555, Invalid=6635, Unknown=0, NotChecked=0, Total=8190 [2021-11-09 08:40:56,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2021-11-09 08:40:57,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 1369. [2021-11-09 08:40:57,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1368 states have (on average 1.087719298245614) internal successors, (1488), 1368 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:57,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 1488 transitions. [2021-11-09 08:40:57,636 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 1488 transitions. Word has length 50 [2021-11-09 08:40:57,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:57,636 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 1488 transitions. [2021-11-09 08:40:57,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 36 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) [2021-11-09 08:40:57,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 1488 transitions. [2021-11-09 08:40:57,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 08:40:57,638 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:57,638 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:57,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-11-09 08:40:57,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-11-09 08:40:57,839 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:57,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:57,839 INFO L85 PathProgramCache]: Analyzing trace with hash -134146609, now seen corresponding path program 121 times [2021-11-09 08:40:57,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:57,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742284843] [2021-11-09 08:40:57,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:57,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-09 08:40:58,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:58,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742284843] [2021-11-09 08:40:58,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742284843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:58,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761289514] [2021-11-09 08:40:58,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:40:58,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:58,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:58,416 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:58,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-11-09 08:41:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:01,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-09 08:41:01,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-09 08:41:03,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761289514] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:03,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:03,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 47 [2021-11-09 08:41:03,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801895312] [2021-11-09 08:41:03,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-09 08:41:03,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:03,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-09 08:41:03,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2030, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 08:41:03,003 INFO L87 Difference]: Start difference. First operand 1369 states and 1488 transitions. Second operand has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:05,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:05,835 INFO L93 Difference]: Finished difference Result 1476 states and 1598 transitions. [2021-11-09 08:41:05,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 08:41:05,836 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-09 08:41:05,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:05,837 INFO L225 Difference]: With dead ends: 1476 [2021-11-09 08:41:05,837 INFO L226 Difference]: Without dead ends: 1439 [2021-11-09 08:41:05,838 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=360, Invalid=4896, Unknown=0, NotChecked=0, Total=5256 [2021-11-09 08:41:05,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2021-11-09 08:41:06,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1363. [2021-11-09 08:41:06,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 1.0888399412628487) internal successors, (1483), 1362 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:06,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 1483 transitions. [2021-11-09 08:41:06,728 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 1483 transitions. Word has length 50 [2021-11-09 08:41:06,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:06,728 INFO L470 AbstractCegarLoop]: Abstraction has 1363 states and 1483 transitions. [2021-11-09 08:41:06,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:06,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 1483 transitions. [2021-11-09 08:41:06,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 08:41:06,730 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:06,730 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:06,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-11-09 08:41:06,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:06,931 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:41:06,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:06,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1039518110, now seen corresponding path program 122 times [2021-11-09 08:41:06,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:06,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834960558] [2021-11-09 08:41:06,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:06,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:07,300 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-09 08:41:07,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:07,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834960558] [2021-11-09 08:41:07,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834960558] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:07,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649582569] [2021-11-09 08:41:07,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:41:07,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:07,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:07,303 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:07,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-11-09 08:41:10,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:41:10,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:41:10,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 08:41:10,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-09 08:41:11,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649582569] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:11,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:11,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 37 [2021-11-09 08:41:11,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053046030] [2021-11-09 08:41:11,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 08:41:11,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:11,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 08:41:11,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1242, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 08:41:11,695 INFO L87 Difference]: Start difference. First operand 1363 states and 1483 transitions. Second operand has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:14,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:14,254 INFO L93 Difference]: Finished difference Result 1476 states and 1589 transitions. [2021-11-09 08:41:14,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 08:41:14,255 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 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 50 [2021-11-09 08:41:14,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:14,256 INFO L225 Difference]: With dead ends: 1476 [2021-11-09 08:41:14,257 INFO L226 Difference]: Without dead ends: 1432 [2021-11-09 08:41:14,257 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=210, Invalid=1860, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 08:41:14,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-11-09 08:41:15,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1363. [2021-11-09 08:41:15,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 1.07856093979442) internal successors, (1469), 1362 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:15,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 1469 transitions. [2021-11-09 08:41:15,174 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 1469 transitions. Word has length 50 [2021-11-09 08:41:15,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:15,174 INFO L470 AbstractCegarLoop]: Abstraction has 1363 states and 1469 transitions. [2021-11-09 08:41:15,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:15,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 1469 transitions. [2021-11-09 08:41:15,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 08:41:15,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:15,176 INFO L513 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:15,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-11-09 08:41:15,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-11-09 08:41:15,377 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:41:15,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:15,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1348994537, now seen corresponding path program 123 times [2021-11-09 08:41:15,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:15,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810657140] [2021-11-09 08:41:15,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:15,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:41:16,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:16,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810657140] [2021-11-09 08:41:16,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810657140] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:16,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326302959] [2021-11-09 08:41:16,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:41:16,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:16,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:16,118 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:16,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-11-09 08:41:19,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-09 08:41:19,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:41:19,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 08:41:19,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:21,632 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:41:21,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326302959] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:21,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:21,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 63 [2021-11-09 08:41:21,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080972248] [2021-11-09 08:41:21,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-09 08:41:21,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:21,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-09 08:41:21,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=3753, Unknown=0, NotChecked=0, Total=3906 [2021-11-09 08:41:21,634 INFO L87 Difference]: Start difference. First operand 1363 states and 1469 transitions. Second operand has 63 states, 63 states have (on average 1.380952380952381) internal successors, (87), 63 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:40,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:40,360 INFO L93 Difference]: Finished difference Result 2368 states and 2498 transitions. [2021-11-09 08:41:40,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-11-09 08:41:40,361 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.380952380952381) internal successors, (87), 63 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-09 08:41:40,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:40,363 INFO L225 Difference]: With dead ends: 2368 [2021-11-09 08:41:40,363 INFO L226 Difference]: Without dead ends: 2308 [2021-11-09 08:41:40,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12290 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=8735, Invalid=40771, Unknown=0, NotChecked=0, Total=49506 [2021-11-09 08:41:40,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-11-09 08:41:41,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1473. [2021-11-09 08:41:41,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 1.078125) internal successors, (1587), 1472 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:41,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 1587 transitions. [2021-11-09 08:41:41,452 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 1587 transitions. Word has length 51 [2021-11-09 08:41:41,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:41,452 INFO L470 AbstractCegarLoop]: Abstraction has 1473 states and 1587 transitions. [2021-11-09 08:41:41,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.380952380952381) internal successors, (87), 63 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:41,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 1587 transitions. [2021-11-09 08:41:41,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 08:41:41,454 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:41,454 INFO L513 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:41,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-11-09 08:41:41,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:41,656 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:41:41,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:41,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1557026922, now seen corresponding path program 124 times [2021-11-09 08:41:41,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:41,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53270177] [2021-11-09 08:41:41,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:41,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:41:42,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:42,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53270177] [2021-11-09 08:41:42,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53270177] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:42,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614460725] [2021-11-09 08:41:42,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:41:42,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:42,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:42,449 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:42,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-11-09 08:41:46,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:41:46,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:41:46,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 08:41:46,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:41:47,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614460725] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:47,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:47,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 64 [2021-11-09 08:41:47,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250746229] [2021-11-09 08:41:47,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-09 08:41:47,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:47,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-09 08:41:47,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=3876, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 08:41:47,990 INFO L87 Difference]: Start difference. First operand 1473 states and 1587 transitions. Second operand has 64 states, 64 states have (on average 1.375) internal successors, (88), 64 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:55,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:55,110 INFO L93 Difference]: Finished difference Result 2346 states and 2468 transitions. [2021-11-09 08:41:55,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 08:41:55,111 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.375) internal successors, (88), 64 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-09 08:41:55,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:55,113 INFO L225 Difference]: With dead ends: 2346 [2021-11-09 08:41:55,113 INFO L226 Difference]: Without dead ends: 2316 [2021-11-09 08:41:55,114 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=398, Invalid=5922, Unknown=0, NotChecked=0, Total=6320 [2021-11-09 08:41:55,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-11-09 08:41:56,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 1481. [2021-11-09 08:41:56,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 1.0777027027027026) internal successors, (1595), 1480 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:56,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 1595 transitions. [2021-11-09 08:41:56,182 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 1595 transitions. Word has length 51 [2021-11-09 08:41:56,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:56,183 INFO L470 AbstractCegarLoop]: Abstraction has 1481 states and 1595 transitions. [2021-11-09 08:41:56,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.375) internal successors, (88), 64 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:56,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 1595 transitions. [2021-11-09 08:41:56,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 08:41:56,184 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:56,184 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:56,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-11-09 08:41:56,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:56,385 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:41:56,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:56,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1271243308, now seen corresponding path program 125 times [2021-11-09 08:41:56,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:56,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940764180] [2021-11-09 08:41:56,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:56,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:56,577 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-09 08:41:56,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:56,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940764180] [2021-11-09 08:41:56,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940764180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:56,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390611847] [2021-11-09 08:41:56,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:41:56,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:56,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:56,579 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:56,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae75ad84-8f8e-4486-b3b0-687da187a3dc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-11-09 08:42:00,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 08:42:00,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:42:00,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 08:42:00,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-09 08:42:00,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390611847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:00,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:00,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-11-09 08:42:00,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553715663] [2021-11-09 08:42:00,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 08:42:00,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:00,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 08:42:00,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=486, Unknown=0, NotChecked=0, Total=756 [2021-11-09 08:42:00,520 INFO L87 Difference]: Start difference. First operand 1481 states and 1595 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 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)