./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R --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 b3d7899c651fa61cfb9cf623e0f4ceb470fe32eb0d0272d2277c965ed07c2f88 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:15:29,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:15:29,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:15:29,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:15:29,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:15:29,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:15:29,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:15:29,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:15:29,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:15:29,092 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:15:29,093 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:15:29,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:15:29,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:15:29,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:15:29,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:15:29,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:15:29,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:15:29,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:15:29,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:15:29,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:15:29,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:15:29,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:15:29,111 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:15:29,112 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:15:29,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:15:29,122 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:15:29,123 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:15:29,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:15:29,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:15:29,127 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:15:29,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:15:29,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:15:29,131 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:15:29,132 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:15:29,134 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:15:29,135 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:15:29,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:15:29,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:15:29,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:15:29,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:15:29,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:15:29,141 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:15:29,182 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:15:29,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:15:29,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:15:29,183 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:15:29,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:15:29,185 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:15:29,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:15:29,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:15:29,186 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:15:29,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:15:29,187 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:15:29,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:15:29,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:15:29,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:15:29,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:15:29,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:15:29,189 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:15:29,189 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:15:29,189 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:15:29,189 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:15:29,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:15:29,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:15:29,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:15:29,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:15:29,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:15:29,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:15:29,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:15:29,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:15:29,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:15:29,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:15:29,192 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:15:29,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:15:29,192 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:15:29,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:15:29,193 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3d7899c651fa61cfb9cf623e0f4ceb470fe32eb0d0272d2277c965ed07c2f88 [2022-11-25 17:15:29,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:15:29,569 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:15:29,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:15:29,573 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:15:29,574 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:15:29,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2022-11-25 17:15:32,846 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:15:33,138 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:15:33,139 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2022-11-25 17:15:33,150 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/data/41683fd2b/8ef49facbeda4e7c81a2f5a8ac45e29f/FLAG45d21056e [2022-11-25 17:15:33,172 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/data/41683fd2b/8ef49facbeda4e7c81a2f5a8ac45e29f [2022-11-25 17:15:33,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:15:33,180 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:15:33,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:15:33,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:15:33,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:15:33,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:15:33" (1/1) ... [2022-11-25 17:15:33,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f6f1d49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:33, skipping insertion in model container [2022-11-25 17:15:33,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:15:33" (1/1) ... [2022-11-25 17:15:33,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:15:33,294 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:15:33,634 WARN L237 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_e07c5dcf-066a-4443-9e59-f6d1a2864705/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i[24038,24051] [2022-11-25 17:15:33,642 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:15:33,657 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:15:33,718 WARN L237 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_e07c5dcf-066a-4443-9e59-f6d1a2864705/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i[24038,24051] [2022-11-25 17:15:33,719 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:15:33,747 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:15:33,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:33 WrapperNode [2022-11-25 17:15:33,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:15:33,749 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:15:33,749 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:15:33,749 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:15:33,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:33" (1/1) ... [2022-11-25 17:15:33,772 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:33" (1/1) ... [2022-11-25 17:15:33,796 INFO L138 Inliner]: procedures = 126, calls = 30, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 102 [2022-11-25 17:15:33,796 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:15:33,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:15:33,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:15:33,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:15:33,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:33" (1/1) ... [2022-11-25 17:15:33,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:33" (1/1) ... [2022-11-25 17:15:33,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:33" (1/1) ... [2022-11-25 17:15:33,811 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:33" (1/1) ... [2022-11-25 17:15:33,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:33" (1/1) ... [2022-11-25 17:15:33,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:33" (1/1) ... [2022-11-25 17:15:33,828 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:33" (1/1) ... [2022-11-25 17:15:33,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:33" (1/1) ... [2022-11-25 17:15:33,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:15:33,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:15:33,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:15:33,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:15:33,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:33" (1/1) ... [2022-11-25 17:15:33,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:15:33,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:33,871 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:15:33,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:15:33,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:15:33,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:15:33,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:15:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:15:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 17:15:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 17:15:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:15:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 17:15:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:15:33,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:15:33,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:15:34,080 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:15:34,083 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:15:34,326 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:15:34,333 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:15:34,333 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 17:15:34,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:15:34 BoogieIcfgContainer [2022-11-25 17:15:34,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:15:34,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:15:34,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:15:34,342 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:15:34,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:15:33" (1/3) ... [2022-11-25 17:15:34,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4857c95d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:15:34, skipping insertion in model container [2022-11-25 17:15:34,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:33" (2/3) ... [2022-11-25 17:15:34,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4857c95d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:15:34, skipping insertion in model container [2022-11-25 17:15:34,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:15:34" (3/3) ... [2022-11-25 17:15:34,346 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all_reverse.i [2022-11-25 17:15:34,367 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:15:34,367 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:15:34,420 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:15:34,427 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@76566fbb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:15:34,428 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 17:15:34,432 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:34,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 17:15:34,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:34,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:34,441 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:15:34,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:34,448 INFO L85 PathProgramCache]: Analyzing trace with hash -409316200, now seen corresponding path program 1 times [2022-11-25 17:15:34,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:34,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981654580] [2022-11-25 17:15:34,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:34,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:34,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:34,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981654580] [2022-11-25 17:15:34,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981654580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:15:34,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:15:34,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:15:34,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327203391] [2022-11-25 17:15:34,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:15:34,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:15:34,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:34,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:15:34,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:15:34,663 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:34,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:34,682 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2022-11-25 17:15:34,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:15:34,685 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 17:15:34,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:34,691 INFO L225 Difference]: With dead ends: 40 [2022-11-25 17:15:34,692 INFO L226 Difference]: Without dead ends: 20 [2022-11-25 17:15:34,695 INFO L412 NwaCegarLoop]: 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 [2022-11-25 17:15:34,699 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:34,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:15:34,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-25 17:15:34,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-25 17:15:34,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:34,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-25 17:15:34,734 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 9 [2022-11-25 17:15:34,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:34,735 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-25 17:15:34,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:34,735 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-25 17:15:34,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 17:15:34,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:34,736 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:34,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:15:34,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:15:34,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:34,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1724473208, now seen corresponding path program 1 times [2022-11-25 17:15:34,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:34,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949554376] [2022-11-25 17:15:34,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:34,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:34,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:34,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:34,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:34,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949554376] [2022-11-25 17:15:34,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949554376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:15:34,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:15:34,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:15:34,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527087634] [2022-11-25 17:15:34,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:15:34,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:15:34,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:34,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:15:34,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:15:34,852 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:34,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:34,868 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2022-11-25 17:15:34,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:15:34,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 17:15:34,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:34,869 INFO L225 Difference]: With dead ends: 38 [2022-11-25 17:15:34,870 INFO L226 Difference]: Without dead ends: 25 [2022-11-25 17:15:34,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:15:34,871 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:34,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 40 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:15:34,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-25 17:15:34,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2022-11-25 17:15:34,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:34,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-25 17:15:34,877 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 9 [2022-11-25 17:15:34,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:34,878 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-25 17:15:34,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:34,878 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-25 17:15:34,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 17:15:34,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:34,879 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:34,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:15:34,879 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:15:34,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:34,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1462004256, now seen corresponding path program 1 times [2022-11-25 17:15:34,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:34,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501990377] [2022-11-25 17:15:34,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:34,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:35,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:35,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501990377] [2022-11-25 17:15:35,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501990377] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:35,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760133700] [2022-11-25 17:15:35,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:35,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:35,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:35,061 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:35,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:15:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:35,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:15:35,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:35,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:35,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:35,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760133700] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:35,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:35,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-11-25 17:15:35,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958585391] [2022-11-25 17:15:35,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:35,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:15:35,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:35,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:15:35,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:15:35,364 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2022-11-25 17:15:35,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:35,403 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-11-25 17:15:35,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:15:35,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-25 17:15:35,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:35,405 INFO L225 Difference]: With dead ends: 39 [2022-11-25 17:15:35,406 INFO L226 Difference]: Without dead ends: 26 [2022-11-25 17:15:35,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:15:35,408 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:35,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 56 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:15:35,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-25 17:15:35,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-25 17:15:35,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 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) [2022-11-25 17:15:35,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-11-25 17:15:35,415 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 14 [2022-11-25 17:15:35,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:35,415 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-11-25 17:15:35,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2022-11-25 17:15:35,416 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-11-25 17:15:35,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-25 17:15:35,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:35,417 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:35,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 17:15:35,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:35,628 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:15:35,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:35,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1187831688, now seen corresponding path program 2 times [2022-11-25 17:15:35,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:35,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094696442] [2022-11-25 17:15:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:35,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:15:35,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:35,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094696442] [2022-11-25 17:15:35,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094696442] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:35,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238865879] [2022-11-25 17:15:35,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:15:35,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:35,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:35,983 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:36,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:15:36,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:15:36,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:36,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:15:36,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 17:15:36,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:15:36,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238865879] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:15:36,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:15:36,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-11-25 17:15:36,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882313551] [2022-11-25 17:15:36,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:15:36,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:15:36,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:36,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:15:36,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:15:36,172 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2022-11-25 17:15:36,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:36,211 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-11-25 17:15:36,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:15:36,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 19 [2022-11-25 17:15:36,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:36,214 INFO L225 Difference]: With dead ends: 37 [2022-11-25 17:15:36,215 INFO L226 Difference]: Without dead ends: 33 [2022-11-25 17:15:36,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:15:36,217 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:36,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 39 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:15:36,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-25 17:15:36,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2022-11-25 17:15:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:36,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-11-25 17:15:36,229 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2022-11-25 17:15:36,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:36,230 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-11-25 17:15:36,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2022-11-25 17:15:36,231 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-11-25 17:15:36,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-25 17:15:36,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:36,234 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:36,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:36,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:36,439 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:15:36,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:36,440 INFO L85 PathProgramCache]: Analyzing trace with hash 419983469, now seen corresponding path program 1 times [2022-11-25 17:15:36,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:36,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074362809] [2022-11-25 17:15:36,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:36,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:15:36,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:36,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074362809] [2022-11-25 17:15:36,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074362809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:36,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080518844] [2022-11-25 17:15:36,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:36,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:36,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:36,711 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:36,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:15:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:36,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:15:36,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 17:15:36,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 17:15:36,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080518844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:36,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:36,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-11-25 17:15:36,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744635279] [2022-11-25 17:15:36,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:36,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:15:36,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:36,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:15:36,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:15:36,926 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:36,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:36,967 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-11-25 17:15:36,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:15:36,967 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-25 17:15:36,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:36,968 INFO L225 Difference]: With dead ends: 38 [2022-11-25 17:15:36,968 INFO L226 Difference]: Without dead ends: 34 [2022-11-25 17:15:36,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:15:36,969 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:36,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 50 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:15:36,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-25 17:15:36,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-25 17:15:36,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:36,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-11-25 17:15:36,975 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2022-11-25 17:15:36,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:36,976 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-11-25 17:15:36,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:36,976 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-11-25 17:15:36,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 17:15:36,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:36,977 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:36,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:37,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:37,184 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:15:37,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:37,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1335297746, now seen corresponding path program 2 times [2022-11-25 17:15:37,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:37,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999269865] [2022-11-25 17:15:37,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:37,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 17:15:37,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:37,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999269865] [2022-11-25 17:15:37,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999269865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:15:37,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:15:37,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:15:37,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241428837] [2022-11-25 17:15:37,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:15:37,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:15:37,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:37,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:15:37,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:15:37,456 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:37,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:37,533 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2022-11-25 17:15:37,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:15:37,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-25 17:15:37,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:37,535 INFO L225 Difference]: With dead ends: 48 [2022-11-25 17:15:37,535 INFO L226 Difference]: Without dead ends: 34 [2022-11-25 17:15:37,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:15:37,536 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:37,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 60 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:15:37,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-25 17:15:37,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-25 17:15:37,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:37,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-11-25 17:15:37,543 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 27 [2022-11-25 17:15:37,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:37,543 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-11-25 17:15:37,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:37,543 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-11-25 17:15:37,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-25 17:15:37,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:37,544 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:37,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:15:37,545 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:15:37,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:37,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1406064088, now seen corresponding path program 1 times [2022-11-25 17:15:37,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:37,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752041245] [2022-11-25 17:15:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:37,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:38,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:15:38,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:38,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752041245] [2022-11-25 17:15:38,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752041245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:38,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475535953] [2022-11-25 17:15:38,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:38,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:38,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:38,336 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:38,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:15:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:38,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 17:15:38,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:38,755 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:38,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 140 [2022-11-25 17:15:38,837 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:38,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 150 [2022-11-25 17:15:41,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 17:15:41,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:15:41,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475535953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:15:41,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:15:41,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 15 [2022-11-25 17:15:41,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8567614] [2022-11-25 17:15:41,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:15:41,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:15:41,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:41,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:15:41,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:15:41,700 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2022-11-25 17:15:41,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:41,820 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-11-25 17:15:41,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:15:41,821 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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 33 [2022-11-25 17:15:41,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:41,822 INFO L225 Difference]: With dead ends: 53 [2022-11-25 17:15:41,822 INFO L226 Difference]: Without dead ends: 38 [2022-11-25 17:15:41,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:15:41,823 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:41,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 62 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:15:41,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-25 17:15:41,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-25 17:15:41,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:41,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-11-25 17:15:41,832 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 33 [2022-11-25 17:15:41,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:41,833 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-11-25 17:15:41,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2022-11-25 17:15:41,833 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-11-25 17:15:41,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 17:15:41,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:41,834 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:41,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:42,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:42,042 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:15:42,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:42,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1205422776, now seen corresponding path program 1 times [2022-11-25 17:15:42,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:42,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647883269] [2022-11-25 17:15:42,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:42,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:42,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:15:43,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:43,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647883269] [2022-11-25 17:15:43,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647883269] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:43,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400483171] [2022-11-25 17:15:43,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:43,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:43,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:43,055 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:43,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:15:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:43,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-25 17:15:43,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:43,804 INFO L321 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-25 17:15:43,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 46 [2022-11-25 17:15:43,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:15:43,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-11-25 17:15:44,108 INFO L321 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2022-11-25 17:15:44,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 34 [2022-11-25 17:15:44,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:15:44,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 12 [2022-11-25 17:15:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:15:44,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:44,680 INFO L321 Elim1Store]: treesize reduction 14, result has 54.8 percent of original size [2022-11-25 17:15:44,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 268 treesize of output 210 [2022-11-25 17:15:44,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 126 [2022-11-25 17:15:44,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-11-25 17:15:45,325 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:15:45,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400483171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:45,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:45,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-11-25 17:15:45,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139408145] [2022-11-25 17:15:45,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:45,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-25 17:15:45,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:45,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-25 17:15:45,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1443, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 17:15:45,331 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 40 states, 40 states have (on average 2.25) internal successors, (90), 40 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:48,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:48,744 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2022-11-25 17:15:48,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 17:15:48,744 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.25) internal successors, (90), 40 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-25 17:15:48,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:48,747 INFO L225 Difference]: With dead ends: 73 [2022-11-25 17:15:48,747 INFO L226 Difference]: Without dead ends: 50 [2022-11-25 17:15:48,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=757, Invalid=2903, Unknown=0, NotChecked=0, Total=3660 [2022-11-25 17:15:48,750 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 527 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:48,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 154 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:15:48,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-25 17:15:48,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2022-11-25 17:15:48,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 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) [2022-11-25 17:15:48,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-11-25 17:15:48,761 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 37 [2022-11-25 17:15:48,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:48,762 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-11-25 17:15:48,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.25) internal successors, (90), 40 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:48,762 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-11-25 17:15:48,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 17:15:48,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:48,763 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:48,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-25 17:15:48,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 17:15:48,969 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:15:48,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:48,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1492532109, now seen corresponding path program 2 times [2022-11-25 17:15:48,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:48,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138846474] [2022-11-25 17:15:48,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:48,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:15:50,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:50,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138846474] [2022-11-25 17:15:50,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138846474] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:50,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499633735] [2022-11-25 17:15:50,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:15:50,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:50,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:50,349 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:50,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07c5dcf-066a-4443-9e59-f6d1a2864705/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:15:50,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:15:50,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:50,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-25 17:15:50,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:50,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:15:50,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2022-11-25 17:15:50,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 17:15:50,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:15:50,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-25 17:15:50,829 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:15:50,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 17:15:50,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 17:15:50,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 17:15:50,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-25 17:15:50,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-25 17:15:51,497 INFO L321 Elim1Store]: treesize reduction 74, result has 3.9 percent of original size [2022-11-25 17:15:51,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 125 treesize of output 56 [2022-11-25 17:15:51,522 INFO L321 Elim1Store]: treesize reduction 22, result has 37.1 percent of original size [2022-11-25 17:15:51,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 30 [2022-11-25 17:15:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:15:51,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:52,445 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:52,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 93 [2022-11-25 17:15:52,453 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:52,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 78 [2022-11-25 17:15:52,473 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:52,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-11-25 17:15:52,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:52,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 78 [2022-11-25 17:15:52,499 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_arrayElimArr_4 (Array Int Int)) (v_arrayElimArr_3 (Array Int Int)) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_4)) (.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_3))) (let ((.cse2 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse3 (+ (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (or (= (select (select .cse0 (select (select .cse1 .cse2) .cse3)) (+ (select (select .cse0 .cse2) .cse3) 4)) 0) (not (= |c_ULTIMATE.start_node_create_~temp~0#1.base| .cse2)) (not (= (select v_arrayElimArr_4 .cse3) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| (select v_arrayElimArr_3 .cse3))))))) (forall ((v_arrayElimArr_2 (Array Int Int)) (v_arrayElimArr_1 (Array Int Int)) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse7 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_2)) (.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_1))) (let ((.cse5 (select (select .cse4 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse6 (+ (select (select .cse7 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (or (= (select (select .cse4 (select (select .cse4 .cse5) .cse6)) (+ (select (select .cse7 .cse5) .cse6) 4)) 0) (not (= |c_ULTIMATE.start_node_create_~temp~0#1.base| .cse5)) (not (= (select v_arrayElimArr_1 .cse6) |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (not (= (select v_arrayElimArr_2 .cse6) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))))))) is different from false [2022-11-25 17:15:52,921 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:52,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 110 [2022-11-25 17:15:53,574 INFO L321 Elim1Store]: treesize reduction 387, result has 67.9 percent of original size [2022-11-25 17:15:53,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 738 treesize of output 1193 [2022-11-25 17:15:53,717 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:53,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 1283 treesize of output 1145