./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg --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 fcf77da5263056f8d62c4caf3b92919690d80ef4ff864a75d0d8d1eec10bdccf ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:45:20,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:45:20,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:45:20,836 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:45:20,837 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:45:20,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:45:20,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:45:20,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:45:20,848 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:45:20,849 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:45:20,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:45:20,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:45:20,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:45:20,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:45:20,858 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:45:20,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:45:20,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:45:20,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:45:20,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:45:20,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:45:20,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:45:20,875 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:45:20,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:45:20,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:45:20,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:45:20,895 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:45:20,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:45:20,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:45:20,898 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:45:20,899 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:45:20,900 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:45:20,901 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:45:20,902 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:45:20,903 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:45:20,905 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:45:20,905 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:45:20,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:45:20,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:45:20,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:45:20,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:45:20,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:45:20,926 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 09:45:20,980 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:45:20,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:45:20,987 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:45:20,987 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:45:20,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:45:20,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:45:20,989 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:45:20,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:45:20,990 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:45:20,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:45:20,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:45:20,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:45:20,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 09:45:20,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:45:20,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 09:45:20,992 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:45:20,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:45:20,993 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:45:20,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 09:45:20,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:45:20,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:45:20,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:45:20,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:45:20,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:45:20,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:45:20,996 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 09:45:20,996 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:45:20,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:45:20,997 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 09:45:20,997 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 09:45:20,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 09:45:20,997 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:45:20,998 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_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fcf77da5263056f8d62c4caf3b92919690d80ef4ff864a75d0d8d1eec10bdccf [2021-10-28 09:45:21,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:45:21,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:45:21,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:45:21,363 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:45:21,364 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:45:21,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/loop-simple/nested_4.c [2021-10-28 09:45:21,453 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/data/8a0ac3ce6/88d5ba44c7e6411894d4bb6cc11ac3fe/FLAG847e33be2 [2021-10-28 09:45:22,019 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:45:22,020 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/sv-benchmarks/c/loop-simple/nested_4.c [2021-10-28 09:45:22,029 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/data/8a0ac3ce6/88d5ba44c7e6411894d4bb6cc11ac3fe/FLAG847e33be2 [2021-10-28 09:45:22,348 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/data/8a0ac3ce6/88d5ba44c7e6411894d4bb6cc11ac3fe [2021-10-28 09:45:22,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:45:22,352 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:45:22,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:45:22,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:45:22,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:45:22,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:45:22" (1/1) ... [2021-10-28 09:45:22,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e223cda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:45:22, skipping insertion in model container [2021-10-28 09:45:22,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:45:22" (1/1) ... [2021-10-28 09:45:22,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:45:22,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:45:22,598 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_c41724a0-9f35-41d1-91a1-64bc451b9bbc/sv-benchmarks/c/loop-simple/nested_4.c[841,854] [2021-10-28 09:45:22,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:45:22,620 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:45:22,638 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_c41724a0-9f35-41d1-91a1-64bc451b9bbc/sv-benchmarks/c/loop-simple/nested_4.c[841,854] [2021-10-28 09:45:22,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:45:22,655 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:45:22,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:45:22 WrapperNode [2021-10-28 09:45:22,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:45:22,657 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:45:22,657 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:45:22,658 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:45:22,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:45:22" (1/1) ... [2021-10-28 09:45:22,680 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:45:22" (1/1) ... [2021-10-28 09:45:22,709 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:45:22,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:45:22,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:45:22,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:45:22,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:45:22" (1/1) ... [2021-10-28 09:45:22,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:45:22" (1/1) ... [2021-10-28 09:45:22,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:45:22" (1/1) ... [2021-10-28 09:45:22,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:45:22" (1/1) ... [2021-10-28 09:45:22,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:45:22" (1/1) ... [2021-10-28 09:45:22,749 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:45:22" (1/1) ... [2021-10-28 09:45:22,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:45:22" (1/1) ... [2021-10-28 09:45:22,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:45:22,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:45:22,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:45:22,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:45:22,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:45:22" (1/1) ... [2021-10-28 09:45:22,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:45:22,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:22,818 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:45:22,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:45:22,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:45:22,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:45:22,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:45:22,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:45:23,114 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:45:23,114 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-28 09:45:23,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:45:23 BoogieIcfgContainer [2021-10-28 09:45:23,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:45:23,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:45:23,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:45:23,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:45:23,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:45:22" (1/3) ... [2021-10-28 09:45:23,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6056c20f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:45:23, skipping insertion in model container [2021-10-28 09:45:23,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:45:22" (2/3) ... [2021-10-28 09:45:23,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6056c20f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:45:23, skipping insertion in model container [2021-10-28 09:45:23,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:45:23" (3/3) ... [2021-10-28 09:45:23,135 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_4.c [2021-10-28 09:45:23,144 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:45:23,145 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 09:45:23,224 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:45:23,232 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 09:45:23,232 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 09:45:23,249 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:23,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-28 09:45:23,255 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:23,256 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-28 09:45:23,257 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:23,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:23,264 INFO L85 PathProgramCache]: Analyzing trace with hash 28738512, now seen corresponding path program 1 times [2021-10-28 09:45:23,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:23,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393753242] [2021-10-28 09:45:23,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:23,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:23,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:23,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393753242] [2021-10-28 09:45:23,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393753242] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:45:23,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:45:23,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 09:45:23,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974114594] [2021-10-28 09:45:23,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 09:45:23,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:23,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 09:45:23,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 09:45:23,470 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:23,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:23,487 INFO L93 Difference]: Finished difference Result 32 states and 48 transitions. [2021-10-28 09:45:23,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 09:45:23,489 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-28 09:45:23,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:23,498 INFO L225 Difference]: With dead ends: 32 [2021-10-28 09:45:23,499 INFO L226 Difference]: Without dead ends: 13 [2021-10-28 09:45:23,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 09:45:23,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-28 09:45:23,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-28 09:45:23,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:23,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-10-28 09:45:23,551 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 5 [2021-10-28 09:45:23,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:23,552 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-10-28 09:45:23,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:23,553 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-10-28 09:45:23,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-28 09:45:23,553 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:23,554 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-28 09:45:23,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:45:23,554 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:23,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:23,556 INFO L85 PathProgramCache]: Analyzing trace with hash 28698150, now seen corresponding path program 1 times [2021-10-28 09:45:23,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:23,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23632798] [2021-10-28 09:45:23,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:23,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:23,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:23,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23632798] [2021-10-28 09:45:23,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23632798] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:45:23,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:45:23,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:45:23,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783625204] [2021-10-28 09:45:23,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:45:23,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:23,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:45:23,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:45:23,627 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:23,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:23,646 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-10-28 09:45:23,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:45:23,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-28 09:45:23,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:23,647 INFO L225 Difference]: With dead ends: 24 [2021-10-28 09:45:23,648 INFO L226 Difference]: Without dead ends: 21 [2021-10-28 09:45:23,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:45:23,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-28 09:45:23,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2021-10-28 09:45:23,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:23,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-10-28 09:45:23,654 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 5 [2021-10-28 09:45:23,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:23,654 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-10-28 09:45:23,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:23,655 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-10-28 09:45:23,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 09:45:23,656 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:23,656 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:23,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 09:45:23,656 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:23,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:23,687 INFO L85 PathProgramCache]: Analyzing trace with hash 270060130, now seen corresponding path program 1 times [2021-10-28 09:45:23,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:23,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823874535] [2021-10-28 09:45:23,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:23,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:23,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:23,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823874535] [2021-10-28 09:45:23,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823874535] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:45:23,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:45:23,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:45:23,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286387446] [2021-10-28 09:45:23,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:45:23,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:23,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:45:23,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:45:23,822 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:23,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:23,850 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2021-10-28 09:45:23,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:45:23,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-28 09:45:23,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:23,852 INFO L225 Difference]: With dead ends: 31 [2021-10-28 09:45:23,853 INFO L226 Difference]: Without dead ends: 20 [2021-10-28 09:45:23,853 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:45:23,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-28 09:45:23,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2021-10-28 09:45:23,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:23,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-10-28 09:45:23,858 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2021-10-28 09:45:23,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:23,859 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-10-28 09:45:23,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:23,860 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-10-28 09:45:23,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 09:45:23,861 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:23,861 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:23,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 09:45:23,862 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:23,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:23,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1248345450, now seen corresponding path program 1 times [2021-10-28 09:45:23,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:23,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545796441] [2021-10-28 09:45:23,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:23,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:23,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:23,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545796441] [2021-10-28 09:45:23,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545796441] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:45:23,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:45:23,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:45:23,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716259921] [2021-10-28 09:45:23,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:45:23,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:23,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:45:23,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:45:23,967 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:23,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:23,991 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2021-10-28 09:45:23,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:45:23,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-28 09:45:23,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:23,993 INFO L225 Difference]: With dead ends: 31 [2021-10-28 09:45:23,993 INFO L226 Difference]: Without dead ends: 19 [2021-10-28 09:45:23,994 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:45:23,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-28 09:45:23,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2021-10-28 09:45:23,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:23,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-10-28 09:45:23,999 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2021-10-28 09:45:23,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:24,000 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-10-28 09:45:24,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:24,000 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-10-28 09:45:24,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 09:45:24,001 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:24,001 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:24,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 09:45:24,002 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:24,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:24,003 INFO L85 PathProgramCache]: Analyzing trace with hash -793045314, now seen corresponding path program 1 times [2021-10-28 09:45:24,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:24,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451352565] [2021-10-28 09:45:24,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:24,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:24,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:24,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451352565] [2021-10-28 09:45:24,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451352565] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:45:24,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:45:24,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:45:24,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441875119] [2021-10-28 09:45:24,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:45:24,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:24,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:45:24,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:45:24,079 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:24,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:24,113 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-10-28 09:45:24,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:45:24,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-28 09:45:24,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:24,115 INFO L225 Difference]: With dead ends: 31 [2021-10-28 09:45:24,115 INFO L226 Difference]: Without dead ends: 18 [2021-10-28 09:45:24,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:45:24,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-28 09:45:24,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-10-28 09:45:24,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:24,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-10-28 09:45:24,121 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2021-10-28 09:45:24,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:24,121 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-10-28 09:45:24,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:24,122 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-10-28 09:45:24,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 09:45:24,123 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:24,123 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:24,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 09:45:24,123 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:24,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:24,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1973513092, now seen corresponding path program 1 times [2021-10-28 09:45:24,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:24,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069774264] [2021-10-28 09:45:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:24,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:24,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:24,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:24,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:24,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069774264] [2021-10-28 09:45:24,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069774264] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:24,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460707484] [2021-10-28 09:45:24,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:24,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:24,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:24,206 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:24,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:45:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:24,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:45:24,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:24,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460707484] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:24,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:24,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-28 09:45:24,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458808522] [2021-10-28 09:45:24,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:45:24,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:24,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:45:24,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:45:24,382 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:24,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:24,410 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-10-28 09:45:24,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:45:24,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-28 09:45:24,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:24,411 INFO L225 Difference]: With dead ends: 34 [2021-10-28 09:45:24,412 INFO L226 Difference]: Without dead ends: 20 [2021-10-28 09:45:24,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:45:24,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-28 09:45:24,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-10-28 09:45:24,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:24,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-10-28 09:45:24,418 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2021-10-28 09:45:24,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:24,419 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-10-28 09:45:24,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:24,419 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-10-28 09:45:24,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 09:45:24,420 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:24,420 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:24,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:24,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:24,647 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:24,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:24,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1763285690, now seen corresponding path program 2 times [2021-10-28 09:45:24,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:24,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890851239] [2021-10-28 09:45:24,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:24,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 09:45:24,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:24,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890851239] [2021-10-28 09:45:24,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890851239] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:24,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068126354] [2021-10-28 09:45:24,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:45:24,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:24,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:24,743 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:24,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:45:24,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:45:24,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:24,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:45:24,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:24,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:24,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068126354] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:24,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:24,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-10-28 09:45:24,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938110850] [2021-10-28 09:45:24,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:45:24,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:24,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:45:24,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:45:24,964 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:25,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:25,118 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2021-10-28 09:45:25,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:45:25,119 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-28 09:45:25,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:25,121 INFO L225 Difference]: With dead ends: 57 [2021-10-28 09:45:25,123 INFO L226 Difference]: Without dead ends: 41 [2021-10-28 09:45:25,124 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:45:25,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-28 09:45:25,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2021-10-28 09:45:25,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 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) [2021-10-28 09:45:25,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-10-28 09:45:25,136 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2021-10-28 09:45:25,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:25,137 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-10-28 09:45:25,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:25,137 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-10-28 09:45:25,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 09:45:25,139 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:25,139 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:25,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:25,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-28 09:45:25,355 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:25,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:25,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1745752790, now seen corresponding path program 3 times [2021-10-28 09:45:25,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:25,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920199478] [2021-10-28 09:45:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:25,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:25,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:25,429 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-28 09:45:25,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:25,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920199478] [2021-10-28 09:45:25,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920199478] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:25,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020382783] [2021-10-28 09:45:25,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:45:25,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:25,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:25,440 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:25,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:45:25,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 09:45:25,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:25,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:45:25,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-10-28 09:45:25,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020382783] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:25,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:25,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-28 09:45:25,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425393093] [2021-10-28 09:45:25,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:45:25,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:25,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:45:25,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:45:25,662 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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) [2021-10-28 09:45:25,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:25,800 INFO L93 Difference]: Finished difference Result 227 states and 265 transitions. [2021-10-28 09:45:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:45:25,801 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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) Word has length 29 [2021-10-28 09:45:25,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:25,809 INFO L225 Difference]: With dead ends: 227 [2021-10-28 09:45:25,811 INFO L226 Difference]: Without dead ends: 200 [2021-10-28 09:45:25,813 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:45:25,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-10-28 09:45:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 96. [2021-10-28 09:45:25,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 95 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:25,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2021-10-28 09:45:25,857 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 29 [2021-10-28 09:45:25,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:25,861 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2021-10-28 09:45:25,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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) [2021-10-28 09:45:25,862 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2021-10-28 09:45:25,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-28 09:45:25,868 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:25,868 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 09:45:25,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:26,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-28 09:45:26,095 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:26,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:26,095 INFO L85 PathProgramCache]: Analyzing trace with hash 305051558, now seen corresponding path program 4 times [2021-10-28 09:45:26,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:26,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503381242] [2021-10-28 09:45:26,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:26,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:26,276 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 193 proven. 9 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2021-10-28 09:45:26,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:26,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503381242] [2021-10-28 09:45:26,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503381242] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:26,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888814817] [2021-10-28 09:45:26,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:45:26,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:26,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:26,289 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:26,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 09:45:26,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:45:26,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:26,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:45:26,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 193 proven. 9 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2021-10-28 09:45:26,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888814817] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:26,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:26,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-28 09:45:26,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443923535] [2021-10-28 09:45:26,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:45:26,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:26,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:45:26,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:45:26,710 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-10-28 09:45:26,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:26,750 INFO L93 Difference]: Finished difference Result 204 states and 239 transitions. [2021-10-28 09:45:26,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:45:26,751 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) Word has length 95 [2021-10-28 09:45:26,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:26,757 INFO L225 Difference]: With dead ends: 204 [2021-10-28 09:45:26,757 INFO L226 Difference]: Without dead ends: 120 [2021-10-28 09:45:26,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:45:26,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-28 09:45:26,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2021-10-28 09:45:26,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.135135135135135) internal successors, (126), 111 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:26,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2021-10-28 09:45:26,789 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 95 [2021-10-28 09:45:26,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:26,792 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2021-10-28 09:45:26,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-10-28 09:45:26,792 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2021-10-28 09:45:26,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-10-28 09:45:26,800 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:26,800 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 09:45:26,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:27,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:27,014 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:27,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:27,015 INFO L85 PathProgramCache]: Analyzing trace with hash -986598490, now seen corresponding path program 5 times [2021-10-28 09:45:27,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:27,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311902840] [2021-10-28 09:45:27,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:27,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 305 proven. 16 refuted. 0 times theorem prover too weak. 1074 trivial. 0 not checked. [2021-10-28 09:45:27,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:27,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311902840] [2021-10-28 09:45:27,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311902840] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:27,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356160567] [2021-10-28 09:45:27,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:45:27,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:27,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:27,153 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:27,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 09:45:27,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-10-28 09:45:27,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:27,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:45:27,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 754 proven. 16 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-10-28 09:45:27,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356160567] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:27,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:27,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-28 09:45:27,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337899175] [2021-10-28 09:45:27,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:45:27,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:27,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:45:27,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:45:27,567 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 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) [2021-10-28 09:45:27,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:27,605 INFO L93 Difference]: Finished difference Result 234 states and 269 transitions. [2021-10-28 09:45:27,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:45:27,606 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 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 111 [2021-10-28 09:45:27,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:27,607 INFO L225 Difference]: With dead ends: 234 [2021-10-28 09:45:27,607 INFO L226 Difference]: Without dead ends: 136 [2021-10-28 09:45:27,612 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:45:27,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-28 09:45:27,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2021-10-28 09:45:27,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.1181102362204725) internal successors, (142), 127 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:27,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 142 transitions. [2021-10-28 09:45:27,642 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 142 transitions. Word has length 111 [2021-10-28 09:45:27,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:27,643 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 142 transitions. [2021-10-28 09:45:27,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 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) [2021-10-28 09:45:27,643 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 142 transitions. [2021-10-28 09:45:27,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-10-28 09:45:27,654 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:27,655 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 09:45:27,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-28 09:45:27,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:27,875 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:27,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:27,875 INFO L85 PathProgramCache]: Analyzing trace with hash -859525210, now seen corresponding path program 6 times [2021-10-28 09:45:27,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:27,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748788699] [2021-10-28 09:45:27,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:27,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:28,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 445 proven. 25 refuted. 0 times theorem prover too weak. 1557 trivial. 0 not checked. [2021-10-28 09:45:28,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:28,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748788699] [2021-10-28 09:45:28,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748788699] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:28,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499901307] [2021-10-28 09:45:28,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:45:28,013 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:28,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:28,023 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:28,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 09:45:28,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-10-28 09:45:28,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:28,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:45:28,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 1094 proven. 25 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-10-28 09:45:28,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499901307] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:28,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:28,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-28 09:45:28,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028302649] [2021-10-28 09:45:28,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:45:28,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:28,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:45:28,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:45:28,587 INFO L87 Difference]: Start difference. First operand 128 states and 142 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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) [2021-10-28 09:45:28,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:28,630 INFO L93 Difference]: Finished difference Result 256 states and 291 transitions. [2021-10-28 09:45:28,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:45:28,631 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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 127 [2021-10-28 09:45:28,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:28,632 INFO L225 Difference]: With dead ends: 256 [2021-10-28 09:45:28,632 INFO L226 Difference]: Without dead ends: 144 [2021-10-28 09:45:28,633 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:45:28,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-28 09:45:28,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-10-28 09:45:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.1048951048951048) internal successors, (158), 143 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 158 transitions. [2021-10-28 09:45:28,654 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 158 transitions. Word has length 127 [2021-10-28 09:45:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:28,654 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 158 transitions. [2021-10-28 09:45:28,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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) [2021-10-28 09:45:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 158 transitions. [2021-10-28 09:45:28,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-10-28 09:45:28,656 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:28,656 INFO L513 BasicCegarLoop]: trace histogram [48, 48, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 09:45:28,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:28,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-28 09:45:28,883 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:28,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:28,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1331145638, now seen corresponding path program 7 times [2021-10-28 09:45:28,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:28,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246389083] [2021-10-28 09:45:28,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:28,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:29,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1066 proven. 89 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2021-10-28 09:45:29,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:29,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246389083] [2021-10-28 09:45:29,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246389083] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:29,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467536088] [2021-10-28 09:45:29,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:45:29,023 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:29,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:29,027 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:29,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 09:45:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:29,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:45:29,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1066 proven. 89 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2021-10-28 09:45:29,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467536088] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:29,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:29,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-28 09:45:29,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327260563] [2021-10-28 09:45:29,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:45:29,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:29,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:45:29,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:45:29,685 INFO L87 Difference]: Start difference. First operand 144 states and 158 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 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) [2021-10-28 09:45:29,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:29,725 INFO L93 Difference]: Finished difference Result 369 states and 406 transitions. [2021-10-28 09:45:29,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:45:29,726 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 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 143 [2021-10-28 09:45:29,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:29,728 INFO L225 Difference]: With dead ends: 369 [2021-10-28 09:45:29,729 INFO L226 Difference]: Without dead ends: 260 [2021-10-28 09:45:29,729 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:45:29,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-10-28 09:45:29,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 204. [2021-10-28 09:45:29,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0935960591133005) internal successors, (222), 203 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:29,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 222 transitions. [2021-10-28 09:45:29,751 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 222 transitions. Word has length 143 [2021-10-28 09:45:29,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:29,752 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 222 transitions. [2021-10-28 09:45:29,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 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) [2021-10-28 09:45:29,752 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 222 transitions. [2021-10-28 09:45:29,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-10-28 09:45:29,755 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:29,755 INFO L513 BasicCegarLoop]: trace histogram [72, 72, 12, 12, 12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 09:45:29,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:29,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 09:45:29,983 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:29,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:29,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1485965146, now seen corresponding path program 8 times [2021-10-28 09:45:29,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:29,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24342366] [2021-10-28 09:45:29,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:29,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:30,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6253 backedges. 2377 proven. 264 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2021-10-28 09:45:30,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:30,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24342366] [2021-10-28 09:45:30,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24342366] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:30,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746033683] [2021-10-28 09:45:30,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:45:30,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:30,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:30,139 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:30,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 09:45:30,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:45:30,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:30,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:45:30,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:31,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6253 backedges. 2377 proven. 264 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2021-10-28 09:45:31,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746033683] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:31,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:31,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-28 09:45:31,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651427933] [2021-10-28 09:45:31,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:45:31,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:31,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:45:31,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:45:31,068 INFO L87 Difference]: Start difference. First operand 204 states and 222 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 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) [2021-10-28 09:45:31,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:31,115 INFO L93 Difference]: Finished difference Result 474 states and 518 transitions. [2021-10-28 09:45:31,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:45:31,116 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 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 203 [2021-10-28 09:45:31,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:31,119 INFO L225 Difference]: With dead ends: 474 [2021-10-28 09:45:31,119 INFO L226 Difference]: Without dead ends: 320 [2021-10-28 09:45:31,120 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:45:31,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-10-28 09:45:31,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 264. [2021-10-28 09:45:31,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.0874524714828897) internal successors, (286), 263 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:31,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 286 transitions. [2021-10-28 09:45:31,145 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 286 transitions. Word has length 203 [2021-10-28 09:45:31,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:31,145 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 286 transitions. [2021-10-28 09:45:31,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 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) [2021-10-28 09:45:31,146 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 286 transitions. [2021-10-28 09:45:31,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-10-28 09:45:31,150 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:31,150 INFO L513 BasicCegarLoop]: trace histogram [96, 96, 16, 16, 16, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 09:45:31,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:31,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 09:45:31,359 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:31,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:31,359 INFO L85 PathProgramCache]: Analyzing trace with hash 889851302, now seen corresponding path program 9 times [2021-10-28 09:45:31,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:31,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972247033] [2021-10-28 09:45:31,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:31,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:31,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11111 backedges. 4210 proven. 526 refuted. 0 times theorem prover too weak. 6375 trivial. 0 not checked. [2021-10-28 09:45:31,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:31,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972247033] [2021-10-28 09:45:31,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972247033] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:31,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894160517] [2021-10-28 09:45:31,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:45:31,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:31,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:31,511 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:31,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 09:45:31,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-10-28 09:45:31,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:31,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:45:31,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11111 backedges. 4214 proven. 526 refuted. 0 times theorem prover too weak. 6371 trivial. 0 not checked. [2021-10-28 09:45:32,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894160517] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:32,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:32,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-28 09:45:32,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796295052] [2021-10-28 09:45:32,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:45:32,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:32,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:45:32,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:45:32,672 INFO L87 Difference]: Start difference. First operand 264 states and 286 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:32,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:32,726 INFO L93 Difference]: Finished difference Result 579 states and 630 transitions. [2021-10-28 09:45:32,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:45:32,727 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 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 263 [2021-10-28 09:45:32,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:32,731 INFO L225 Difference]: With dead ends: 579 [2021-10-28 09:45:32,732 INFO L226 Difference]: Without dead ends: 380 [2021-10-28 09:45:32,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:45:32,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-10-28 09:45:32,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 324. [2021-10-28 09:45:32,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.08359133126935) internal successors, (350), 323 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:32,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 350 transitions. [2021-10-28 09:45:32,761 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 350 transitions. Word has length 263 [2021-10-28 09:45:32,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:32,762 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 350 transitions. [2021-10-28 09:45:32,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:32,763 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 350 transitions. [2021-10-28 09:45:32,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-10-28 09:45:32,769 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:32,769 INFO L513 BasicCegarLoop]: trace histogram [120, 120, 20, 20, 20, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 09:45:32,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:32,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 09:45:32,994 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:32,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:32,995 INFO L85 PathProgramCache]: Analyzing trace with hash -955282778, now seen corresponding path program 10 times [2021-10-28 09:45:32,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:32,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086390329] [2021-10-28 09:45:32,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:32,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 17361 backedges. 6565 proven. 875 refuted. 0 times theorem prover too weak. 9921 trivial. 0 not checked. [2021-10-28 09:45:33,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:33,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086390329] [2021-10-28 09:45:33,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086390329] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:33,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087291032] [2021-10-28 09:45:33,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:45:33,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:33,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:33,198 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:33,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 09:45:33,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:45:33,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:33,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:45:33,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17361 backedges. 6565 proven. 875 refuted. 0 times theorem prover too weak. 9921 trivial. 0 not checked. [2021-10-28 09:45:34,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087291032] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:34,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:34,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-28 09:45:34,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695571536] [2021-10-28 09:45:34,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:45:34,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:34,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:45:34,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:45:34,456 INFO L87 Difference]: Start difference. First operand 324 states and 350 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:34,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:34,534 INFO L93 Difference]: Finished difference Result 628 states and 682 transitions. [2021-10-28 09:45:34,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:45:34,535 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 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 323 [2021-10-28 09:45:34,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:34,538 INFO L225 Difference]: With dead ends: 628 [2021-10-28 09:45:34,538 INFO L226 Difference]: Without dead ends: 384 [2021-10-28 09:45:34,541 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:45:34,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-10-28 09:45:34,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2021-10-28 09:45:34,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 1.080939947780679) internal successors, (414), 383 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:34,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 414 transitions. [2021-10-28 09:45:34,578 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 414 transitions. Word has length 323 [2021-10-28 09:45:34,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:34,579 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 414 transitions. [2021-10-28 09:45:34,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:34,580 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 414 transitions. [2021-10-28 09:45:34,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2021-10-28 09:45:34,590 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:34,590 INFO L513 BasicCegarLoop]: trace histogram [144, 144, 24, 24, 24, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 09:45:34,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:34,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 09:45:34,814 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:34,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:34,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1217433690, now seen corresponding path program 11 times [2021-10-28 09:45:34,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:34,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71791968] [2021-10-28 09:45:34,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:34,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:35,060 INFO L134 CoverageAnalysis]: Checked inductivity of 25003 backedges. 12595 proven. 3149 refuted. 0 times theorem prover too weak. 9259 trivial. 0 not checked. [2021-10-28 09:45:35,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:35,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71791968] [2021-10-28 09:45:35,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71791968] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:35,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195569309] [2021-10-28 09:45:35,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:45:35,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:35,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:35,066 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:35,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 09:45:35,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 130 check-sat command(s) [2021-10-28 09:45:35,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:35,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:45:35,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 25003 backedges. 12595 proven. 3149 refuted. 0 times theorem prover too weak. 9259 trivial. 0 not checked. [2021-10-28 09:45:36,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195569309] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:36,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:36,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-28 09:45:36,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95828260] [2021-10-28 09:45:36,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:45:36,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:36,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:45:36,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:45:36,868 INFO L87 Difference]: Start difference. First operand 384 states and 414 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:36,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:36,959 INFO L93 Difference]: Finished difference Result 948 states and 1023 transitions. [2021-10-28 09:45:36,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:45:36,960 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 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 383 [2021-10-28 09:45:36,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:36,965 INFO L225 Difference]: With dead ends: 948 [2021-10-28 09:45:36,965 INFO L226 Difference]: Without dead ends: 754 [2021-10-28 09:45:36,966 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:45:36,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-10-28 09:45:37,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 570. [2021-10-28 09:45:37,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 1.07908611599297) internal successors, (614), 569 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:37,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 614 transitions. [2021-10-28 09:45:37,016 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 614 transitions. Word has length 383 [2021-10-28 09:45:37,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:37,017 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 614 transitions. [2021-10-28 09:45:37,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:37,018 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 614 transitions. [2021-10-28 09:45:37,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2021-10-28 09:45:37,033 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:37,034 INFO L513 BasicCegarLoop]: trace histogram [216, 216, 36, 36, 36, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 09:45:37,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:37,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 09:45:37,254 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:37,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:37,255 INFO L85 PathProgramCache]: Analyzing trace with hash 267351982, now seen corresponding path program 12 times [2021-10-28 09:45:37,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:37,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535641450] [2021-10-28 09:45:37,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:37,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 56384 backedges. 28332 proven. 9444 refuted. 0 times theorem prover too weak. 18608 trivial. 0 not checked. [2021-10-28 09:45:37,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:37,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535641450] [2021-10-28 09:45:37,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535641450] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:37,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310370913] [2021-10-28 09:45:37,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:45:37,652 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:37,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:37,654 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:37,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 09:45:38,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 134 check-sat command(s) [2021-10-28 09:45:38,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:38,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:45:38,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 56384 backedges. 0 proven. 28334 refuted. 0 times theorem prover too weak. 28050 trivial. 0 not checked. [2021-10-28 09:45:41,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310370913] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:41,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:41,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-10-28 09:45:41,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381703982] [2021-10-28 09:45:41,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:45:41,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:41,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:45:41,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:45:41,133 INFO L87 Difference]: Start difference. First operand 570 states and 614 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:41,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:41,424 INFO L93 Difference]: Finished difference Result 2160 states and 2331 transitions. [2021-10-28 09:45:41,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 09:45:41,425 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 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 569 [2021-10-28 09:45:41,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:41,437 INFO L225 Difference]: With dead ends: 2160 [2021-10-28 09:45:41,438 INFO L226 Difference]: Without dead ends: 1873 [2021-10-28 09:45:41,440 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-10-28 09:45:41,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-10-28 09:45:41,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1131. [2021-10-28 09:45:41,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 1.0778761061946902) internal successors, (1218), 1130 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:41,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1218 transitions. [2021-10-28 09:45:41,549 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1218 transitions. Word has length 569 [2021-10-28 09:45:41,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:41,550 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 1218 transitions. [2021-10-28 09:45:41,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:41,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1218 transitions. [2021-10-28 09:45:41,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1131 [2021-10-28 09:45:41,621 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:41,622 INFO L513 BasicCegarLoop]: trace histogram [432, 432, 72, 72, 72, 12, 12, 12, 3, 3, 3, 1, 1, 1, 1, 1] [2021-10-28 09:45:41,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:41,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:41,851 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:41,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:41,852 INFO L85 PathProgramCache]: Analyzing trace with hash 550676450, now seen corresponding path program 13 times [2021-10-28 09:45:41,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:41,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693472410] [2021-10-28 09:45:41,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:41,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 226074 backedges. 100725 proven. 18886 refuted. 0 times theorem prover too weak. 106463 trivial. 0 not checked. [2021-10-28 09:45:42,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:42,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693472410] [2021-10-28 09:45:42,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693472410] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:42,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361966155] [2021-10-28 09:45:42,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:45:42,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:42,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:42,732 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:42,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 09:45:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:43,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 1860 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:45:43,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 226074 backedges. 100725 proven. 18886 refuted. 0 times theorem prover too weak. 106463 trivial. 0 not checked. [2021-10-28 09:45:47,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361966155] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:47,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:47,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-28 09:45:47,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231231095] [2021-10-28 09:45:47,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:45:47,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:47,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:45:47,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:45:47,030 INFO L87 Difference]: Start difference. First operand 1131 states and 1218 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:47,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:47,173 INFO L93 Difference]: Finished difference Result 2441 states and 2631 transitions. [2021-10-28 09:45:47,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:45:47,174 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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 1130 [2021-10-28 09:45:47,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:47,186 INFO L225 Difference]: With dead ends: 2441 [2021-10-28 09:45:47,186 INFO L226 Difference]: Without dead ends: 1686 [2021-10-28 09:45:47,188 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1136 GetRequests, 1130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:45:47,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2021-10-28 09:45:47,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1410. [2021-10-28 09:45:47,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 1.0773598296664302) internal successors, (1518), 1409 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:47,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 1518 transitions. [2021-10-28 09:45:47,298 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 1518 transitions. Word has length 1130 [2021-10-28 09:45:47,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:47,299 INFO L470 AbstractCegarLoop]: Abstraction has 1410 states and 1518 transitions. [2021-10-28 09:45:47,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:47,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 1518 transitions. [2021-10-28 09:45:47,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1410 [2021-10-28 09:45:47,325 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:47,326 INFO L513 BasicCegarLoop]: trace histogram [540, 540, 90, 90, 90, 15, 15, 15, 3, 3, 3, 1, 1, 1, 1, 1] [2021-10-28 09:45:47,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:47,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 09:45:47,550 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:47,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:47,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1545912050, now seen corresponding path program 14 times [2021-10-28 09:45:47,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:47,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604506026] [2021-10-28 09:45:47,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:47,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 353397 backedges. 157375 proven. 31475 refuted. 0 times theorem prover too weak. 164547 trivial. 0 not checked. [2021-10-28 09:45:48,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:48,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604506026] [2021-10-28 09:45:48,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604506026] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:48,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805104117] [2021-10-28 09:45:48,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:45:48,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:48,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:48,692 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:48,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 09:45:50,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:45:50,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:50,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 2310 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:45:50,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 353397 backedges. 157375 proven. 31475 refuted. 0 times theorem prover too weak. 164547 trivial. 0 not checked. [2021-10-28 09:45:53,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805104117] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:53,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:53,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-28 09:45:53,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008176418] [2021-10-28 09:45:53,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:45:53,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:53,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:45:53,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:45:53,974 INFO L87 Difference]: Start difference. First operand 1410 states and 1518 transitions. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:54,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:54,129 INFO L93 Difference]: Finished difference Result 2630 states and 2834 transitions. [2021-10-28 09:45:54,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:45:54,130 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 1409 [2021-10-28 09:45:54,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:54,142 INFO L225 Difference]: With dead ends: 2630 [2021-10-28 09:45:54,142 INFO L226 Difference]: Without dead ends: 1689 [2021-10-28 09:45:54,145 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1416 GetRequests, 1409 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:45:54,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2021-10-28 09:45:54,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1689. [2021-10-28 09:45:54,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1688 states have (on average 1.0770142180094786) internal successors, (1818), 1688 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:54,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 1818 transitions. [2021-10-28 09:45:54,275 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 1818 transitions. Word has length 1409 [2021-10-28 09:45:54,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:54,277 INFO L470 AbstractCegarLoop]: Abstraction has 1689 states and 1818 transitions. [2021-10-28 09:45:54,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:54,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 1818 transitions. [2021-10-28 09:45:54,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1689 [2021-10-28 09:45:54,306 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:54,307 INFO L513 BasicCegarLoop]: trace histogram [648, 648, 108, 108, 108, 18, 18, 18, 3, 3, 3, 1, 1, 1, 1, 1] [2021-10-28 09:45:54,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:54,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:54,518 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:54,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:54,519 INFO L85 PathProgramCache]: Analyzing trace with hash -477789726, now seen corresponding path program 15 times [2021-10-28 09:45:54,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:54,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894401885] [2021-10-28 09:45:54,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:54,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 509043 backedges. 0 proven. 339924 refuted. 0 times theorem prover too weak. 169119 trivial. 0 not checked. [2021-10-28 09:45:56,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:56,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894401885] [2021-10-28 09:45:56,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894401885] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:56,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494667273] [2021-10-28 09:45:56,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:45:56,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:56,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:56,534 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:56,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 09:45:58,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 189 check-sat command(s) [2021-10-28 09:45:58,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:58,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 09:45:58,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:46:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 509043 backedges. 242798 proven. 0 refuted. 0 times theorem prover too weak. 266245 trivial. 0 not checked. [2021-10-28 09:46:04,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494667273] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:46:04,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:46:04,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [6] total 18 [2021-10-28 09:46:04,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971689365] [2021-10-28 09:46:04,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 09:46:04,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:46:04,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 09:46:04,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:46:04,272 INFO L87 Difference]: Start difference. First operand 1689 states and 1818 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:46:04,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:46:04,487 INFO L93 Difference]: Finished difference Result 1689 states and 1818 transitions. [2021-10-28 09:46:04,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:46:04,488 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 1688 [2021-10-28 09:46:04,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:46:04,492 INFO L225 Difference]: With dead ends: 1689 [2021-10-28 09:46:04,492 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 09:46:04,495 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1693 GetRequests, 1677 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:46:04,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 09:46:04,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 09:46:04,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:46:04,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 09:46:04,496 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1688 [2021-10-28 09:46:04,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:46:04,497 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:46:04,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:46:04,497 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 09:46:04,497 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 09:46:04,500 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:46:04,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 09:46:04,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-10-28 09:46:04,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-28 09:46:04,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:46:04,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:46:18,799 WARN L207 SmtUtils]: Spent 14.06 s on a formula simplification. DAG size of input: 2361 DAG size of output: 394 [2021-10-28 09:46:18,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:46:18,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:46:18,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:46:21,635 INFO L857 garLoopResultBuilder]: For program point L31-1(lines 31 33) no Hoare annotation was computed. [2021-10-28 09:46:21,635 INFO L857 garLoopResultBuilder]: For program point L23-2(lines 23 29) no Hoare annotation was computed. [2021-10-28 09:46:21,636 INFO L853 garLoopResultBuilder]: At program point L23-3(lines 23 29) the Hoare annotation is: (and (< ULTIMATE.start_main_~a~0 6) (<= 6 ULTIMATE.start_main_~d~0) (< ULTIMATE.start_main_~b~0 7) (< ULTIMATE.start_main_~d~0 7) (<= 6 ULTIMATE.start_main_~c~0) (< ULTIMATE.start_main_~c~0 7)) [2021-10-28 09:46:21,636 INFO L857 garLoopResultBuilder]: For program point L32(line 32) no Hoare annotation was computed. [2021-10-28 09:46:21,636 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-28 09:46:21,636 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-28 09:46:21,636 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-28 09:46:21,636 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 32) no Hoare annotation was computed. [2021-10-28 09:46:21,637 INFO L857 garLoopResultBuilder]: For program point L24-2(lines 24 28) no Hoare annotation was computed. [2021-10-28 09:46:21,637 INFO L853 garLoopResultBuilder]: At program point L24-3(lines 24 28) the Hoare annotation is: (and (< ULTIMATE.start_main_~a~0 6) (<= 6 ULTIMATE.start_main_~d~0) (< ULTIMATE.start_main_~d~0 7) (< ULTIMATE.start_main_~c~0 7) (<= ULTIMATE.start_main_~b~0 5)) [2021-10-28 09:46:21,637 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-28 09:46:21,637 INFO L857 garLoopResultBuilder]: For program point L25-2(lines 25 27) no Hoare annotation was computed. [2021-10-28 09:46:21,637 INFO L853 garLoopResultBuilder]: At program point L25-3(lines 25 27) the Hoare annotation is: (and (< ULTIMATE.start_main_~a~0 6) (< ULTIMATE.start_main_~d~0 7) (< ULTIMATE.start_main_~c~0 6) (<= ULTIMATE.start_main_~b~0 5)) [2021-10-28 09:46:21,637 INFO L860 garLoopResultBuilder]: At program point L34(lines 15 35) the Hoare annotation is: true [2021-10-28 09:46:21,637 INFO L857 garLoopResultBuilder]: For program point L22-2(lines 22 30) no Hoare annotation was computed. [2021-10-28 09:46:21,638 INFO L853 garLoopResultBuilder]: At program point L22-3(lines 22 30) the Hoare annotation is: (and (<= 6 ULTIMATE.start_main_~d~0) (<= 6 ULTIMATE.start_main_~b~0) (< ULTIMATE.start_main_~b~0 7) (< ULTIMATE.start_main_~a~0 7) (< ULTIMATE.start_main_~d~0 7) (<= 6 ULTIMATE.start_main_~c~0) (< ULTIMATE.start_main_~c~0 7)) [2021-10-28 09:46:21,638 INFO L857 garLoopResultBuilder]: For program point L22-4(lines 15 35) no Hoare annotation was computed. [2021-10-28 09:46:21,642 INFO L731 BasicCegarLoop]: Path program histogram: [15, 1, 1, 1, 1, 1] [2021-10-28 09:46:21,644 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:46:21,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:46:21 BoogieIcfgContainer [2021-10-28 09:46:21,663 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:46:21,664 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:46:21,664 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:46:21,666 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:46:21,667 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:45:23" (3/4) ... [2021-10-28 09:46:21,670 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 09:46:21,680 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-28 09:46:21,681 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 09:46:21,681 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:46:21,681 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:46:21,721 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:46:21,721 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:46:21,723 INFO L168 Benchmark]: Toolchain (without parser) took 59369.69 ms. Allocated memory was 98.6 MB in the beginning and 1.3 GB in the end (delta: 1.2 GB). Free memory was 63.0 MB in the beginning and 522.5 MB in the end (delta: -459.5 MB). Peak memory consumption was 755.3 MB. Max. memory is 16.1 GB. [2021-10-28 09:46:21,723 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 98.6 MB. Free memory was 68.7 MB in the beginning and 68.7 MB in the end (delta: 28.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:46:21,724 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.83 ms. Allocated memory is still 98.6 MB. Free memory was 62.7 MB in the beginning and 73.7 MB in the end (delta: -11.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:46:21,724 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.09 ms. Allocated memory is still 98.6 MB. Free memory was 73.7 MB in the beginning and 72.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:46:21,725 INFO L168 Benchmark]: Boogie Preprocessor took 52.72 ms. Allocated memory is still 98.6 MB. Free memory was 72.4 MB in the beginning and 71.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:46:21,725 INFO L168 Benchmark]: RCFGBuilder took 358.14 ms. Allocated memory is still 98.6 MB. Free memory was 71.2 MB in the beginning and 61.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:46:21,726 INFO L168 Benchmark]: TraceAbstraction took 58538.41 ms. Allocated memory was 98.6 MB in the beginning and 1.3 GB in the end (delta: 1.2 GB). Free memory was 61.5 MB in the beginning and 524.6 MB in the end (delta: -463.1 MB). Peak memory consumption was 787.6 MB. Max. memory is 16.1 GB. [2021-10-28 09:46:21,726 INFO L168 Benchmark]: Witness Printer took 57.95 ms. Allocated memory is still 1.3 GB. Free memory was 524.6 MB in the beginning and 522.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:46:21,729 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 98.6 MB. Free memory was 68.7 MB in the beginning and 68.7 MB in the end (delta: 28.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 301.83 ms. Allocated memory is still 98.6 MB. Free memory was 62.7 MB in the beginning and 73.7 MB in the end (delta: -11.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.09 ms. Allocated memory is still 98.6 MB. Free memory was 73.7 MB in the beginning and 72.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 52.72 ms. Allocated memory is still 98.6 MB. Free memory was 72.4 MB in the beginning and 71.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 358.14 ms. Allocated memory is still 98.6 MB. Free memory was 71.2 MB in the beginning and 61.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 58538.41 ms. Allocated memory was 98.6 MB in the beginning and 1.3 GB in the end (delta: 1.2 GB). Free memory was 61.5 MB in the beginning and 524.6 MB in the end (delta: -463.1 MB). Peak memory consumption was 787.6 MB. Max. memory is 16.1 GB. * Witness Printer took 57.95 ms. Allocated memory is still 1.3 GB. Free memory was 524.6 MB in the beginning and 522.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 32]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 58.4s, OverallIterations: 20, TraceHistogramMax: 648, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.2s, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 16.9s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 268 SDtfs, 557 SDslu, 491 SDs, 0 SdLazy, 394 SolverSat, 76 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6623 GetRequests, 6505 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1689occurred in iteration=19, InterpolantAutomatonStates: 140, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 20 MinimizatonAttempts, 1518 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 913 NumberOfFragments, 71 HoareAnnotationTreeSize, 5 FomulaSimplifications, 579689 FormulaSimplificationTreeSizeReduction, 14.3s HoareSimplificationTime, 5 FomulaSimplificationsInter, 20312 FormulaSimplificationTreeSizeReductionInter, 2.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 4.9s SatisfiabilityAnalysisTime, 22.7s InterpolantComputationTime, 13057 NumberOfCodeBlocks, 11607 NumberOfCodeBlocksAsserted, 554 NumberOfCheckSat, 13022 ConstructedInterpolants, 0 QuantifiedInterpolants, 24931 SizeOfPredicates, 4 NumberOfNonLiveVariables, 8601 ConjunctsInSsa, 84 ConjunctsInUnsatCore, 35 InterpolantComputations, 6 PerfectInterpolantSequences, 1935239/2423578 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: ((a < 6 && d < 7) && c < 6) && b <= 5 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((a < 6 && 6 <= d) && b < 7) && d < 7) && 6 <= c) && c < 7 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((((6 <= d && 6 <= b) && b < 7) && a < 7) && d < 7) && 6 <= c) && c < 7 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (((a < 6 && 6 <= d) && d < 7) && c < 7) && b <= 5 RESULT: Ultimate proved your program to be correct! [2021-10-28 09:46:21,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c41724a0-9f35-41d1-91a1-64bc451b9bbc/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...