./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 08:35:21,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:35:21,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:35:21,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:35:21,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:35:21,115 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:35:21,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:35:21,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:35:21,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:35:21,131 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:35:21,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:35:21,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:35:21,134 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:35:21,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:35:21,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:35:21,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:35:21,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:35:21,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:35:21,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:35:21,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:35:21,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:35:21,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:35:21,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:35:21,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:35:21,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:35:21,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:35:21,176 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:35:21,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:35:21,178 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:35:21,180 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:35:21,180 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:35:21,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:35:21,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:35:21,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:35:21,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:35:21,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:35:21,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:35:21,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:35:21,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:35:21,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:35:21,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:35:21,190 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 08:35:21,234 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:35:21,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:35:21,235 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:35:21,236 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:35:21,243 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:35:21,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:35:21,243 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:35:21,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:35:21,244 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:35:21,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:35:21,245 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:35:21,245 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:35:21,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 08:35:21,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:35:21,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 08:35:21,246 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:35:21,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 08:35:21,247 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:35:21,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 08:35:21,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:35:21,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:35:21,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:35:21,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:35:21,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:35:21,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:35:21,249 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 08:35:21,249 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 08:35:21,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 08:35:21,250 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 08:35:21,251 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 08:35:21,251 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 08:35:21,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:35:21,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c [2021-10-28 08:35:21,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:35:21,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:35:21,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:35:21,520 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:35:21,521 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:35:21,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2021-10-28 08:35:21,591 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/data/8085a55dc/1d1faf114d28401a87af50e0d5dc78c1/FLAGd45e1e9f8 [2021-10-28 08:35:22,026 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:35:22,027 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2021-10-28 08:35:22,032 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/data/8085a55dc/1d1faf114d28401a87af50e0d5dc78c1/FLAGd45e1e9f8 [2021-10-28 08:35:22,443 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/data/8085a55dc/1d1faf114d28401a87af50e0d5dc78c1 [2021-10-28 08:35:22,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:35:22,455 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 08:35:22,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:35:22,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:35:22,461 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:35:22,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:35:22" (1/1) ... [2021-10-28 08:35:22,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75383169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:22, skipping insertion in model container [2021-10-28 08:35:22,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:35:22" (1/1) ... [2021-10-28 08:35:22,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:35:22,486 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:35:22,713 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c[465,478] [2021-10-28 08:35:22,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:35:22,748 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:35:22,763 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c[465,478] [2021-10-28 08:35:22,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:35:22,795 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:35:22,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:22 WrapperNode [2021-10-28 08:35:22,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:35:22,799 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 08:35:22,800 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 08:35:22,800 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 08:35:22,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:22" (1/1) ... [2021-10-28 08:35:22,814 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:22" (1/1) ... [2021-10-28 08:35:22,838 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 08:35:22,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:35:22,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:35:22,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:35:22,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:22" (1/1) ... [2021-10-28 08:35:22,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:22" (1/1) ... [2021-10-28 08:35:22,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:22" (1/1) ... [2021-10-28 08:35:22,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:22" (1/1) ... [2021-10-28 08:35:22,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:22" (1/1) ... [2021-10-28 08:35:22,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:22" (1/1) ... [2021-10-28 08:35:22,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:22" (1/1) ... [2021-10-28 08:35:22,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:35:22,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:35:22,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:35:22,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:35:22,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:22" (1/1) ... [2021-10-28 08:35:22,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:35:22,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:22,912 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:35:22,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:35:22,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 08:35:22,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:35:22,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:35:22,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:35:23,237 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:35:23,238 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-28 08:35:23,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:35:23 BoogieIcfgContainer [2021-10-28 08:35:23,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:35:23,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:35:23,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:35:23,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:35:23,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:35:22" (1/3) ... [2021-10-28 08:35:23,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e47f59e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:35:23, skipping insertion in model container [2021-10-28 08:35:23,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:22" (2/3) ... [2021-10-28 08:35:23,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e47f59e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:35:23, skipping insertion in model container [2021-10-28 08:35:23,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:35:23" (3/3) ... [2021-10-28 08:35:23,253 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.c [2021-10-28 08:35:23,258 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:35:23,258 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 08:35:23,351 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:35:23,357 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 08:35:23,357 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 08:35:23,386 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:23,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 08:35:23,390 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:23,391 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:23,392 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:23,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:23,397 INFO L85 PathProgramCache]: Analyzing trace with hash -493598204, now seen corresponding path program 1 times [2021-10-28 08:35:23,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:23,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674499563] [2021-10-28 08:35:23,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:23,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:23,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:23,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674499563] [2021-10-28 08:35:23,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674499563] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:35:23,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:35:23,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 08:35:23,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434555396] [2021-10-28 08:35:23,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 08:35:23,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:23,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 08:35:23,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 08:35:23,609 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:23,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:23,626 INFO L93 Difference]: Finished difference Result 33 states and 53 transitions. [2021-10-28 08:35:23,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 08:35:23,627 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-28 08:35:23,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:23,636 INFO L225 Difference]: With dead ends: 33 [2021-10-28 08:35:23,637 INFO L226 Difference]: Without dead ends: 16 [2021-10-28 08:35:23,640 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 08:35:23,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-28 08:35:23,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-28 08:35:23,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:23,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2021-10-28 08:35:23,670 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 12 [2021-10-28 08:35:23,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:23,671 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-10-28 08:35:23,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:23,672 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2021-10-28 08:35:23,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 08:35:23,673 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:23,673 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:23,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 08:35:23,674 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:23,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:23,677 INFO L85 PathProgramCache]: Analyzing trace with hash -2059231113, now seen corresponding path program 1 times [2021-10-28 08:35:23,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:23,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41928398] [2021-10-28 08:35:23,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:23,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:23,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:23,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41928398] [2021-10-28 08:35:23,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41928398] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:35:23,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:35:23,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:35:23,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610698330] [2021-10-28 08:35:23,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:35:23,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:23,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:35:23,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:35:23,839 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:23,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:23,896 INFO L93 Difference]: Finished difference Result 32 states and 46 transitions. [2021-10-28 08:35:23,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:35:23,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-28 08:35:23,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:23,898 INFO L225 Difference]: With dead ends: 32 [2021-10-28 08:35:23,899 INFO L226 Difference]: Without dead ends: 20 [2021-10-28 08:35:23,900 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:35:23,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-28 08:35:23,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-10-28 08:35:23,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:23,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-10-28 08:35:23,909 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 12 [2021-10-28 08:35:23,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:23,910 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-10-28 08:35:23,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:23,911 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2021-10-28 08:35:23,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 08:35:23,912 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:23,912 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:23,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 08:35:23,914 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:23,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:23,915 INFO L85 PathProgramCache]: Analyzing trace with hash 573171571, now seen corresponding path program 1 times [2021-10-28 08:35:23,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:23,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072383966] [2021-10-28 08:35:23,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:23,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:35:23,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:23,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072383966] [2021-10-28 08:35:23,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072383966] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:35:23,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:35:23,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:35:23,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51844424] [2021-10-28 08:35:23,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 08:35:23,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:23,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 08:35:23,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:35:23,985 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:24,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:24,016 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2021-10-28 08:35:24,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 08:35:24,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-28 08:35:24,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:24,017 INFO L225 Difference]: With dead ends: 38 [2021-10-28 08:35:24,017 INFO L226 Difference]: Without dead ends: 25 [2021-10-28 08:35:24,018 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:35:24,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-28 08:35:24,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2021-10-28 08:35:24,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:24,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-10-28 08:35:24,022 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 15 [2021-10-28 08:35:24,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:24,023 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-10-28 08:35:24,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:24,023 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-10-28 08:35:24,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 08:35:24,024 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:24,024 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:24,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 08:35:24,025 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:24,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:24,025 INFO L85 PathProgramCache]: Analyzing trace with hash 630429873, now seen corresponding path program 1 times [2021-10-28 08:35:24,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:24,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536202514] [2021-10-28 08:35:24,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:24,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:35:24,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:24,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536202514] [2021-10-28 08:35:24,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536202514] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:35:24,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:35:24,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:35:24,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376269539] [2021-10-28 08:35:24,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:35:24,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:24,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:35:24,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:35:24,114 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:24,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:24,139 INFO L93 Difference]: Finished difference Result 46 states and 64 transitions. [2021-10-28 08:35:24,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:35:24,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-28 08:35:24,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:24,142 INFO L225 Difference]: With dead ends: 46 [2021-10-28 08:35:24,142 INFO L226 Difference]: Without dead ends: 32 [2021-10-28 08:35:24,142 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:35:24,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-28 08:35:24,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-10-28 08:35:24,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:24,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 42 transitions. [2021-10-28 08:35:24,152 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 42 transitions. Word has length 15 [2021-10-28 08:35:24,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:24,152 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 42 transitions. [2021-10-28 08:35:24,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:24,153 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 42 transitions. [2021-10-28 08:35:24,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 08:35:24,157 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:24,158 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:24,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 08:35:24,158 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:24,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:24,159 INFO L85 PathProgramCache]: Analyzing trace with hash 630489455, now seen corresponding path program 1 times [2021-10-28 08:35:24,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:24,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939960708] [2021-10-28 08:35:24,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:24,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:24,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:24,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939960708] [2021-10-28 08:35:24,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939960708] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:24,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472170528] [2021-10-28 08:35:24,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:24,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:24,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:24,264 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:24,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 08:35:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:24,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 08:35:24,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:24,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472170528] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:24,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:35:24,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-28 08:35:24,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313489044] [2021-10-28 08:35:24,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:35:24,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:24,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:35:24,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:35:24,480 INFO L87 Difference]: Start difference. First operand 30 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:24,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:24,576 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2021-10-28 08:35:24,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:35:24,577 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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 15 [2021-10-28 08:35:24,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:24,578 INFO L225 Difference]: With dead ends: 67 [2021-10-28 08:35:24,578 INFO L226 Difference]: Without dead ends: 41 [2021-10-28 08:35:24,579 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:35:24,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-28 08:35:24,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-10-28 08:35:24,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 35 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:24,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 50 transitions. [2021-10-28 08:35:24,586 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 50 transitions. Word has length 15 [2021-10-28 08:35:24,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:24,586 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 50 transitions. [2021-10-28 08:35:24,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:24,587 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2021-10-28 08:35:24,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 08:35:24,587 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:24,588 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:24,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:24,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:24,815 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:24,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:24,816 INFO L85 PathProgramCache]: Analyzing trace with hash 730990835, now seen corresponding path program 2 times [2021-10-28 08:35:24,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:24,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438319288] [2021-10-28 08:35:24,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:24,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:24,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:24,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:24,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438319288] [2021-10-28 08:35:24,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438319288] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:24,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929561337] [2021-10-28 08:35:24,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:35:24,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:24,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:24,935 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:24,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 08:35:25,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:35:25,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:35:25,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 08:35:25,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 08:35:25,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929561337] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:25,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:35:25,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-28 08:35:25,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637137788] [2021-10-28 08:35:25,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:35:25,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:25,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:35:25,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:35:25,136 INFO L87 Difference]: Start difference. First operand 36 states and 50 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:25,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:25,348 INFO L93 Difference]: Finished difference Result 123 states and 179 transitions. [2021-10-28 08:35:25,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 08:35:25,351 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-28 08:35:25,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:25,352 INFO L225 Difference]: With dead ends: 123 [2021-10-28 08:35:25,353 INFO L226 Difference]: Without dead ends: 91 [2021-10-28 08:35:25,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:35:25,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-28 08:35:25,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2021-10-28 08:35:25,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.3733333333333333) internal successors, (103), 75 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:25,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 103 transitions. [2021-10-28 08:35:25,370 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 103 transitions. Word has length 18 [2021-10-28 08:35:25,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:25,374 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 103 transitions. [2021-10-28 08:35:25,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:25,375 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 103 transitions. [2021-10-28 08:35:25,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 08:35:25,376 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:25,376 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:25,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-28 08:35:25,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-28 08:35:25,598 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:25,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:25,599 INFO L85 PathProgramCache]: Analyzing trace with hash -104466575, now seen corresponding path program 1 times [2021-10-28 08:35:25,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:25,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638443545] [2021-10-28 08:35:25,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:25,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:25,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:25,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638443545] [2021-10-28 08:35:25,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638443545] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:25,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740801853] [2021-10-28 08:35:25,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:25,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:25,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:25,700 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:25,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 08:35:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:25,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 08:35:25,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:25,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740801853] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:25,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:35:25,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-28 08:35:25,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099462091] [2021-10-28 08:35:25,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 08:35:25,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:25,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 08:35:25,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:35:25,945 INFO L87 Difference]: Start difference. First operand 76 states and 103 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:26,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:26,011 INFO L93 Difference]: Finished difference Result 199 states and 271 transitions. [2021-10-28 08:35:26,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:35:26,012 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-28 08:35:26,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:26,013 INFO L225 Difference]: With dead ends: 199 [2021-10-28 08:35:26,013 INFO L226 Difference]: Without dead ends: 127 [2021-10-28 08:35:26,014 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:35:26,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-28 08:35:26,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 88. [2021-10-28 08:35:26,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.367816091954023) internal successors, (119), 87 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:26,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 119 transitions. [2021-10-28 08:35:26,028 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 119 transitions. Word has length 21 [2021-10-28 08:35:26,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:26,028 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 119 transitions. [2021-10-28 08:35:26,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:26,029 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 119 transitions. [2021-10-28 08:35:26,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 08:35:26,030 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:26,030 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:26,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:26,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-28 08:35:26,231 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:26,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:26,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1399176113, now seen corresponding path program 2 times [2021-10-28 08:35:26,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:26,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870821093] [2021-10-28 08:35:26,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:26,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:26,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:26,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870821093] [2021-10-28 08:35:26,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870821093] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:26,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866956634] [2021-10-28 08:35:26,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:35:26,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:26,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:26,305 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:26,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 08:35:26,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:35:26,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:35:26,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 08:35:26,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 08:35:26,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866956634] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:26,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:35:26,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-10-28 08:35:26,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78636031] [2021-10-28 08:35:26,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 08:35:26,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:26,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 08:35:26,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:35:26,581 INFO L87 Difference]: Start difference. First operand 88 states and 119 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:26,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:26,869 INFO L93 Difference]: Finished difference Result 291 states and 407 transitions. [2021-10-28 08:35:26,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 08:35:26,870 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-28 08:35:26,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:26,872 INFO L225 Difference]: With dead ends: 291 [2021-10-28 08:35:26,873 INFO L226 Difference]: Without dead ends: 207 [2021-10-28 08:35:26,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-10-28 08:35:26,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-10-28 08:35:26,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 146. [2021-10-28 08:35:26,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.3655172413793104) internal successors, (198), 145 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:26,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 198 transitions. [2021-10-28 08:35:26,895 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 198 transitions. Word has length 24 [2021-10-28 08:35:26,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:26,896 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 198 transitions. [2021-10-28 08:35:26,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:26,896 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 198 transitions. [2021-10-28 08:35:26,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 08:35:26,897 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:26,898 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:26,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:27,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:27,114 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:27,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:27,114 INFO L85 PathProgramCache]: Analyzing trace with hash -2084547665, now seen corresponding path program 3 times [2021-10-28 08:35:27,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:27,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899713525] [2021-10-28 08:35:27,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:27,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:27,197 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:27,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:27,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899713525] [2021-10-28 08:35:27,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899713525] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:27,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885836256] [2021-10-28 08:35:27,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:35:27,198 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:27,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:27,199 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:27,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 08:35:27,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 08:35:27,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:35:27,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 08:35:27,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-28 08:35:27,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885836256] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:35:27,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:35:27,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2021-10-28 08:35:27,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444388812] [2021-10-28 08:35:27,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:35:27,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:27,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:35:27,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:35:27,363 INFO L87 Difference]: Start difference. First operand 146 states and 198 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:27,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:27,412 INFO L93 Difference]: Finished difference Result 334 states and 454 transitions. [2021-10-28 08:35:27,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:35:27,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-28 08:35:27,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:27,414 INFO L225 Difference]: With dead ends: 334 [2021-10-28 08:35:27,414 INFO L226 Difference]: Without dead ends: 192 [2021-10-28 08:35:27,415 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:35:27,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-10-28 08:35:27,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 164. [2021-10-28 08:35:27,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.2638036809815951) internal successors, (206), 163 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:27,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 206 transitions. [2021-10-28 08:35:27,433 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 206 transitions. Word has length 27 [2021-10-28 08:35:27,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:27,434 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 206 transitions. [2021-10-28 08:35:27,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:27,434 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 206 transitions. [2021-10-28 08:35:27,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 08:35:27,436 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:27,436 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:27,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:27,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:27,651 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:27,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:27,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1868779761, now seen corresponding path program 1 times [2021-10-28 08:35:27,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:27,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163194744] [2021-10-28 08:35:27,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:27,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-28 08:35:27,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:27,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163194744] [2021-10-28 08:35:27,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163194744] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:35:27,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:35:27,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:35:27,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796986751] [2021-10-28 08:35:27,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 08:35:27,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:27,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 08:35:27,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:35:27,701 INFO L87 Difference]: Start difference. First operand 164 states and 206 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:27,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:27,723 INFO L93 Difference]: Finished difference Result 344 states and 436 transitions. [2021-10-28 08:35:27,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 08:35:27,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-28 08:35:27,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:27,725 INFO L225 Difference]: With dead ends: 344 [2021-10-28 08:35:27,725 INFO L226 Difference]: Without dead ends: 184 [2021-10-28 08:35:27,726 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:35:27,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-10-28 08:35:27,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 162. [2021-10-28 08:35:27,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.2422360248447204) internal successors, (200), 161 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 200 transitions. [2021-10-28 08:35:27,753 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 200 transitions. Word has length 27 [2021-10-28 08:35:27,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:27,754 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 200 transitions. [2021-10-28 08:35:27,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:27,754 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 200 transitions. [2021-10-28 08:35:27,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 08:35:27,755 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:27,755 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:27,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 08:35:27,756 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:27,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:27,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1323368939, now seen corresponding path program 1 times [2021-10-28 08:35:27,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:27,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262395980] [2021-10-28 08:35:27,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:27,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-28 08:35:27,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:27,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262395980] [2021-10-28 08:35:27,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262395980] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:35:27,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:35:27,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:35:27,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882901830] [2021-10-28 08:35:27,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 08:35:27,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:27,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 08:35:27,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:35:27,785 INFO L87 Difference]: Start difference. First operand 162 states and 200 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:27,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:27,805 INFO L93 Difference]: Finished difference Result 256 states and 318 transitions. [2021-10-28 08:35:27,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 08:35:27,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-28 08:35:27,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:27,807 INFO L225 Difference]: With dead ends: 256 [2021-10-28 08:35:27,808 INFO L226 Difference]: Without dead ends: 176 [2021-10-28 08:35:27,808 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:35:27,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-10-28 08:35:27,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 166. [2021-10-28 08:35:27,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.2121212121212122) internal successors, (200), 165 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:27,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 200 transitions. [2021-10-28 08:35:27,824 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 200 transitions. Word has length 28 [2021-10-28 08:35:27,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:27,824 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 200 transitions. [2021-10-28 08:35:27,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:27,824 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 200 transitions. [2021-10-28 08:35:27,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 08:35:27,828 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:27,828 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:27,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 08:35:27,828 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:27,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:27,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1325275563, now seen corresponding path program 1 times [2021-10-28 08:35:27,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:27,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386688286] [2021-10-28 08:35:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:27,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:27,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:27,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386688286] [2021-10-28 08:35:27,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386688286] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:27,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565122732] [2021-10-28 08:35:27,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:27,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:27,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:27,922 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:27,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 08:35:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:28,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 08:35:28,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:28,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565122732] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:28,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:35:28,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-28 08:35:28,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606533799] [2021-10-28 08:35:28,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 08:35:28,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:28,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 08:35:28,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:35:28,206 INFO L87 Difference]: Start difference. First operand 166 states and 200 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:28,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:28,277 INFO L93 Difference]: Finished difference Result 457 states and 547 transitions. [2021-10-28 08:35:28,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:35:28,278 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-28 08:35:28,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:28,281 INFO L225 Difference]: With dead ends: 457 [2021-10-28 08:35:28,281 INFO L226 Difference]: Without dead ends: 295 [2021-10-28 08:35:28,282 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:35:28,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-10-28 08:35:28,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 196. [2021-10-28 08:35:28,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.2) internal successors, (234), 195 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:28,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 234 transitions. [2021-10-28 08:35:28,300 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 234 transitions. Word has length 28 [2021-10-28 08:35:28,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:28,301 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 234 transitions. [2021-10-28 08:35:28,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:28,301 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 234 transitions. [2021-10-28 08:35:28,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 08:35:28,305 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:28,305 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:28,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:28,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 08:35:28,519 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:28,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:28,520 INFO L85 PathProgramCache]: Analyzing trace with hash 399501479, now seen corresponding path program 2 times [2021-10-28 08:35:28,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:28,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059745080] [2021-10-28 08:35:28,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:28,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:28,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:28,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059745080] [2021-10-28 08:35:28,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059745080] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:28,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720509124] [2021-10-28 08:35:28,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:35:28,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:28,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:28,615 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:28,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 08:35:28,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:35:28,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:35:28,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 08:35:28,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:28,928 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:28,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720509124] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:28,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:35:28,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-28 08:35:28,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944502622] [2021-10-28 08:35:28,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 08:35:28,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:28,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 08:35:28,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-10-28 08:35:28,932 INFO L87 Difference]: Start difference. First operand 196 states and 234 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:29,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:29,029 INFO L93 Difference]: Finished difference Result 517 states and 615 transitions. [2021-10-28 08:35:29,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:35:29,030 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-28 08:35:29,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:29,032 INFO L225 Difference]: With dead ends: 517 [2021-10-28 08:35:29,032 INFO L226 Difference]: Without dead ends: 325 [2021-10-28 08:35:29,033 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-10-28 08:35:29,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-10-28 08:35:29,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 226. [2021-10-28 08:35:29,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.191111111111111) internal successors, (268), 225 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:29,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 268 transitions. [2021-10-28 08:35:29,052 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 268 transitions. Word has length 31 [2021-10-28 08:35:29,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:29,052 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 268 transitions. [2021-10-28 08:35:29,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:29,053 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 268 transitions. [2021-10-28 08:35:29,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 08:35:29,054 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:29,054 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:29,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:29,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:29,272 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:29,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:29,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1351227349, now seen corresponding path program 3 times [2021-10-28 08:35:29,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:29,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992744377] [2021-10-28 08:35:29,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:29,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:29,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:29,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992744377] [2021-10-28 08:35:29,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992744377] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:29,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039018507] [2021-10-28 08:35:29,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:35:29,373 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:29,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:29,374 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:29,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 08:35:29,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 08:35:29,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:35:29,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 08:35:29,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-28 08:35:29,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039018507] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:35:29,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:35:29,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2021-10-28 08:35:29,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821940850] [2021-10-28 08:35:29,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:35:29,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:29,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:35:29,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-10-28 08:35:29,622 INFO L87 Difference]: Start difference. First operand 226 states and 268 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:29,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:29,687 INFO L93 Difference]: Finished difference Result 229 states and 270 transitions. [2021-10-28 08:35:29,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:35:29,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-28 08:35:29,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:29,689 INFO L225 Difference]: With dead ends: 229 [2021-10-28 08:35:29,689 INFO L226 Difference]: Without dead ends: 169 [2021-10-28 08:35:29,689 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:35:29,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-28 08:35:29,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2021-10-28 08:35:29,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.2035928143712575) internal successors, (201), 167 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:29,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 201 transitions. [2021-10-28 08:35:29,701 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 201 transitions. Word has length 34 [2021-10-28 08:35:29,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:29,702 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 201 transitions. [2021-10-28 08:35:29,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:29,702 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 201 transitions. [2021-10-28 08:35:29,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 08:35:29,703 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:29,703 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:29,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:29,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 08:35:29,931 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:29,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:29,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1860700439, now seen corresponding path program 1 times [2021-10-28 08:35:29,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:29,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328916241] [2021-10-28 08:35:29,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:29,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:30,017 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:30,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:30,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328916241] [2021-10-28 08:35:30,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328916241] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:30,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6244708] [2021-10-28 08:35:30,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:30,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:30,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:30,020 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:30,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 08:35:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:30,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 08:35:30,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:30,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6244708] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:30,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:35:30,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-28 08:35:30,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038288008] [2021-10-28 08:35:30,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 08:35:30,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:30,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 08:35:30,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-10-28 08:35:30,382 INFO L87 Difference]: Start difference. First operand 168 states and 201 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:30,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:30,504 INFO L93 Difference]: Finished difference Result 451 states and 537 transitions. [2021-10-28 08:35:30,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 08:35:30,505 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-28 08:35:30,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:30,509 INFO L225 Difference]: With dead ends: 451 [2021-10-28 08:35:30,509 INFO L226 Difference]: Without dead ends: 287 [2021-10-28 08:35:30,511 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-10-28 08:35:30,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-28 08:35:30,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 192. [2021-10-28 08:35:30,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.198952879581152) internal successors, (229), 191 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:30,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 229 transitions. [2021-10-28 08:35:30,527 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 229 transitions. Word has length 34 [2021-10-28 08:35:30,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:30,527 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 229 transitions. [2021-10-28 08:35:30,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:30,528 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 229 transitions. [2021-10-28 08:35:30,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 08:35:30,528 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:30,528 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:30,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:30,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 08:35:30,744 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:30,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:30,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1470700201, now seen corresponding path program 2 times [2021-10-28 08:35:30,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:30,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822021600] [2021-10-28 08:35:30,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:30,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:30,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:30,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822021600] [2021-10-28 08:35:30,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822021600] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:30,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002094763] [2021-10-28 08:35:30,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:35:30,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:30,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:30,845 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:30,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 08:35:30,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:35:30,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:35:30,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 08:35:30,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:31,259 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:31,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002094763] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:31,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:35:31,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-10-28 08:35:31,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489027287] [2021-10-28 08:35:31,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 08:35:31,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:31,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 08:35:31,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-10-28 08:35:31,261 INFO L87 Difference]: Start difference. First operand 192 states and 229 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:31,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:31,372 INFO L93 Difference]: Finished difference Result 499 states and 593 transitions. [2021-10-28 08:35:31,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 08:35:31,373 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-28 08:35:31,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:31,376 INFO L225 Difference]: With dead ends: 499 [2021-10-28 08:35:31,376 INFO L226 Difference]: Without dead ends: 311 [2021-10-28 08:35:31,377 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-10-28 08:35:31,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-10-28 08:35:31,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 216. [2021-10-28 08:35:31,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.1953488372093024) internal successors, (257), 215 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:31,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 257 transitions. [2021-10-28 08:35:31,412 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 257 transitions. Word has length 37 [2021-10-28 08:35:31,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:31,413 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 257 transitions. [2021-10-28 08:35:31,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:31,414 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 257 transitions. [2021-10-28 08:35:31,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 08:35:31,415 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:31,415 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:31,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:31,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 08:35:31,635 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:31,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:31,635 INFO L85 PathProgramCache]: Analyzing trace with hash -877109527, now seen corresponding path program 3 times [2021-10-28 08:35:31,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:31,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946374777] [2021-10-28 08:35:31,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:31,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:31,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:31,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946374777] [2021-10-28 08:35:31,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946374777] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:31,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921907459] [2021-10-28 08:35:31,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:35:31,744 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:31,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:31,745 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:31,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 08:35:31,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 08:35:31,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:35:31,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 08:35:31,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-10-28 08:35:32,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921907459] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:35:32,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:35:32,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 19 [2021-10-28 08:35:32,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351110457] [2021-10-28 08:35:32,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:35:32,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:32,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:35:32,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-10-28 08:35:32,291 INFO L87 Difference]: Start difference. First operand 216 states and 257 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:32,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:32,428 INFO L93 Difference]: Finished difference Result 496 states and 586 transitions. [2021-10-28 08:35:32,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:35:32,428 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 40 [2021-10-28 08:35:32,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:32,432 INFO L225 Difference]: With dead ends: 496 [2021-10-28 08:35:32,432 INFO L226 Difference]: Without dead ends: 494 [2021-10-28 08:35:32,433 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-10-28 08:35:32,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-10-28 08:35:32,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 306. [2021-10-28 08:35:32,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.1836065573770491) internal successors, (361), 305 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:32,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 361 transitions. [2021-10-28 08:35:32,468 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 361 transitions. Word has length 40 [2021-10-28 08:35:32,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:32,469 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 361 transitions. [2021-10-28 08:35:32,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:32,469 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 361 transitions. [2021-10-28 08:35:32,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 08:35:32,470 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:32,470 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:32,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:32,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 08:35:32,695 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:32,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:32,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1950517015, now seen corresponding path program 1 times [2021-10-28 08:35:32,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:32,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797934341] [2021-10-28 08:35:32,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:32,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:32,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:32,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797934341] [2021-10-28 08:35:32,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797934341] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:32,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787099434] [2021-10-28 08:35:32,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:32,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:32,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:32,825 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:32,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 08:35:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:33,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 08:35:33,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:33,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787099434] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:33,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:35:33,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-10-28 08:35:33,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873289401] [2021-10-28 08:35:33,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 08:35:33,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:33,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 08:35:33,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-10-28 08:35:33,328 INFO L87 Difference]: Start difference. First operand 306 states and 361 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:33,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:33,471 INFO L93 Difference]: Finished difference Result 669 states and 793 transitions. [2021-10-28 08:35:33,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 08:35:33,472 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-28 08:35:33,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:33,475 INFO L225 Difference]: With dead ends: 669 [2021-10-28 08:35:33,475 INFO L226 Difference]: Without dead ends: 439 [2021-10-28 08:35:33,476 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-10-28 08:35:33,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-10-28 08:35:33,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 339. [2021-10-28 08:35:33,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.180473372781065) internal successors, (399), 338 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:33,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 399 transitions. [2021-10-28 08:35:33,503 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 399 transitions. Word has length 40 [2021-10-28 08:35:33,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:33,503 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 399 transitions. [2021-10-28 08:35:33,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:33,503 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 399 transitions. [2021-10-28 08:35:33,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-28 08:35:33,504 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:33,504 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:33,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:33,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 08:35:33,719 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:33,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:33,719 INFO L85 PathProgramCache]: Analyzing trace with hash -658324379, now seen corresponding path program 2 times [2021-10-28 08:35:33,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:33,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853024212] [2021-10-28 08:35:33,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:33,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:33,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:33,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853024212] [2021-10-28 08:35:33,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853024212] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:33,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082329841] [2021-10-28 08:35:33,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:35:33,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:33,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:33,849 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:33,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 08:35:34,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:35:34,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:35:34,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 08:35:34,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-10-28 08:35:34,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082329841] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:34,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:35:34,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2021-10-28 08:35:34,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531651291] [2021-10-28 08:35:34,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 08:35:34,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:34,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 08:35:34,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=212, Unknown=0, NotChecked=0, Total=342 [2021-10-28 08:35:34,353 INFO L87 Difference]: Start difference. First operand 339 states and 399 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:34,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:34,796 INFO L93 Difference]: Finished difference Result 1075 states and 1251 transitions. [2021-10-28 08:35:34,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 08:35:34,797 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-10-28 08:35:34,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:34,802 INFO L225 Difference]: With dead ends: 1075 [2021-10-28 08:35:34,802 INFO L226 Difference]: Without dead ends: 821 [2021-10-28 08:35:34,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=996, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 08:35:34,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-10-28 08:35:34,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 333. [2021-10-28 08:35:34,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.1686746987951808) internal successors, (388), 332 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:34,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 388 transitions. [2021-10-28 08:35:34,835 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 388 transitions. Word has length 43 [2021-10-28 08:35:34,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:34,836 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 388 transitions. [2021-10-28 08:35:34,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:34,836 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 388 transitions. [2021-10-28 08:35:34,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 08:35:34,837 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:34,837 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:34,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:35,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:35,051 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:35,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:35,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1311604647, now seen corresponding path program 3 times [2021-10-28 08:35:35,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:35,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041062385] [2021-10-28 08:35:35,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:35,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:35,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:35,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041062385] [2021-10-28 08:35:35,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041062385] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:35,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300111547] [2021-10-28 08:35:35,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:35:35,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:35,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:35,225 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:35,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 08:35:35,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 08:35:35,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:35:35,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 08:35:35,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-28 08:35:35,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300111547] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:35:35,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:35:35,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 21 [2021-10-28 08:35:35,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210466252] [2021-10-28 08:35:35,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:35:35,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:35,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:35:35,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-10-28 08:35:35,931 INFO L87 Difference]: Start difference. First operand 333 states and 388 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:36,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:36,094 INFO L93 Difference]: Finished difference Result 442 states and 513 transitions. [2021-10-28 08:35:36,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:35:36,094 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 46 [2021-10-28 08:35:36,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:36,097 INFO L225 Difference]: With dead ends: 442 [2021-10-28 08:35:36,097 INFO L226 Difference]: Without dead ends: 440 [2021-10-28 08:35:36,100 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-10-28 08:35:36,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-10-28 08:35:36,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 333. [2021-10-28 08:35:36,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.1686746987951808) internal successors, (388), 332 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:36,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 388 transitions. [2021-10-28 08:35:36,133 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 388 transitions. Word has length 46 [2021-10-28 08:35:36,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:36,133 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 388 transitions. [2021-10-28 08:35:36,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:36,134 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 388 transitions. [2021-10-28 08:35:36,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 08:35:36,135 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:36,135 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:36,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:36,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:36,349 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:36,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:36,349 INFO L85 PathProgramCache]: Analyzing trace with hash -53609623, now seen corresponding path program 1 times [2021-10-28 08:35:36,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:36,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132168960] [2021-10-28 08:35:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:36,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-10-28 08:35:36,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:36,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132168960] [2021-10-28 08:35:36,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132168960] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:35:36,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:35:36,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:35:36,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178167404] [2021-10-28 08:35:36,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:35:36,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:36,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:35:36,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:35:36,396 INFO L87 Difference]: Start difference. First operand 333 states and 388 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:36,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:36,460 INFO L93 Difference]: Finished difference Result 561 states and 655 transitions. [2021-10-28 08:35:36,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:35:36,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-28 08:35:36,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:36,463 INFO L225 Difference]: With dead ends: 561 [2021-10-28 08:35:36,463 INFO L226 Difference]: Without dead ends: 448 [2021-10-28 08:35:36,464 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:35:36,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-10-28 08:35:36,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 400. [2021-10-28 08:35:36,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.1754385964912282) internal successors, (469), 399 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:36,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 469 transitions. [2021-10-28 08:35:36,518 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 469 transitions. Word has length 46 [2021-10-28 08:35:36,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:36,519 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 469 transitions. [2021-10-28 08:35:36,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:36,519 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 469 transitions. [2021-10-28 08:35:36,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-10-28 08:35:36,520 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:36,520 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:36,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-28 08:35:36,521 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:36,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:36,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1284068705, now seen corresponding path program 1 times [2021-10-28 08:35:36,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:36,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166260114] [2021-10-28 08:35:36,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:36,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 387 proven. 176 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-10-28 08:35:36,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:36,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166260114] [2021-10-28 08:35:36,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166260114] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:36,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363883258] [2021-10-28 08:35:36,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:36,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:36,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:36,667 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:36,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 08:35:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:36,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 08:35:36,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 387 proven. 176 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-10-28 08:35:37,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363883258] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:37,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:35:37,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-10-28 08:35:37,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557446488] [2021-10-28 08:35:37,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 08:35:37,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:37,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 08:35:37,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2021-10-28 08:35:37,439 INFO L87 Difference]: Start difference. First operand 400 states and 469 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:37,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:37,688 INFO L93 Difference]: Finished difference Result 1102 states and 1266 transitions. [2021-10-28 08:35:37,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 08:35:37,689 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-10-28 08:35:37,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:37,693 INFO L225 Difference]: With dead ends: 1102 [2021-10-28 08:35:37,693 INFO L226 Difference]: Without dead ends: 793 [2021-10-28 08:35:37,694 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2021-10-28 08:35:37,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-10-28 08:35:37,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 439. [2021-10-28 08:35:37,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.17351598173516) internal successors, (514), 438 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:37,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 514 transitions. [2021-10-28 08:35:37,750 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 514 transitions. Word has length 87 [2021-10-28 08:35:37,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:37,750 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 514 transitions. [2021-10-28 08:35:37,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:37,751 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 514 transitions. [2021-10-28 08:35:37,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-10-28 08:35:37,752 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:37,752 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:37,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:37,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-28 08:35:37,967 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:37,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:37,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1856213775, now seen corresponding path program 2 times [2021-10-28 08:35:37,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:37,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404371983] [2021-10-28 08:35:37,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:37,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 458 proven. 210 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-10-28 08:35:38,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:38,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404371983] [2021-10-28 08:35:38,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404371983] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:38,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265770476] [2021-10-28 08:35:38,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:35:38,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:38,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:38,120 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:38,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 08:35:38,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:35:38,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:35:38,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 08:35:38,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 458 proven. 210 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-10-28 08:35:38,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265770476] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:38,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:35:38,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-10-28 08:35:38,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425960286] [2021-10-28 08:35:38,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 08:35:38,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:38,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 08:35:38,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2021-10-28 08:35:38,881 INFO L87 Difference]: Start difference. First operand 439 states and 514 transitions. Second operand has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:39,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:39,151 INFO L93 Difference]: Finished difference Result 1171 states and 1346 transitions. [2021-10-28 08:35:39,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 08:35:39,152 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-10-28 08:35:39,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:39,156 INFO L225 Difference]: With dead ends: 1171 [2021-10-28 08:35:39,156 INFO L226 Difference]: Without dead ends: 832 [2021-10-28 08:35:39,157 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2021-10-28 08:35:39,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-10-28 08:35:39,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 478. [2021-10-28 08:35:39,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 1.1719077568134173) internal successors, (559), 477 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:39,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 559 transitions. [2021-10-28 08:35:39,224 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 559 transitions. Word has length 93 [2021-10-28 08:35:39,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:39,224 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 559 transitions. [2021-10-28 08:35:39,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:39,225 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 559 transitions. [2021-10-28 08:35:39,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-28 08:35:39,226 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:39,226 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:39,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:39,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 08:35:39,439 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:39,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:39,440 INFO L85 PathProgramCache]: Analyzing trace with hash -267019423, now seen corresponding path program 3 times [2021-10-28 08:35:39,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:39,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101425149] [2021-10-28 08:35:39,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:39,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:39,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 535 proven. 247 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-10-28 08:35:39,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:39,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101425149] [2021-10-28 08:35:39,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101425149] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:39,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728735279] [2021-10-28 08:35:39,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:35:39,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:39,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:39,627 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:39,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 08:35:40,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 08:35:40,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:35:40,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 08:35:40,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 37 proven. 541 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2021-10-28 08:35:40,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728735279] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:40,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:35:40,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 24 [2021-10-28 08:35:40,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077937656] [2021-10-28 08:35:40,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-28 08:35:40,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:40,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-28 08:35:40,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-10-28 08:35:40,685 INFO L87 Difference]: Start difference. First operand 478 states and 559 transitions. Second operand has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:42,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:42,342 INFO L93 Difference]: Finished difference Result 2208 states and 2540 transitions. [2021-10-28 08:35:42,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-10-28 08:35:42,343 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 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 99 [2021-10-28 08:35:42,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:42,350 INFO L225 Difference]: With dead ends: 2208 [2021-10-28 08:35:42,350 INFO L226 Difference]: Without dead ends: 1839 [2021-10-28 08:35:42,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2190 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1574, Invalid=5908, Unknown=0, NotChecked=0, Total=7482 [2021-10-28 08:35:42,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2021-10-28 08:35:42,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 770. [2021-10-28 08:35:42,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 1.1716514954486346) internal successors, (901), 769 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:42,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 901 transitions. [2021-10-28 08:35:42,456 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 901 transitions. Word has length 99 [2021-10-28 08:35:42,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:42,456 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 901 transitions. [2021-10-28 08:35:42,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:42,456 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 901 transitions. [2021-10-28 08:35:42,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-28 08:35:42,458 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:42,458 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 24, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:42,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:42,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:42,683 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:42,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:42,683 INFO L85 PathProgramCache]: Analyzing trace with hash -111346257, now seen corresponding path program 1 times [2021-10-28 08:35:42,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:42,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43849550] [2021-10-28 08:35:42,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:42,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:42,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 49 proven. 861 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-10-28 08:35:42,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:42,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43849550] [2021-10-28 08:35:42,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43849550] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:42,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685138546] [2021-10-28 08:35:42,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:42,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:42,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:42,877 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:42,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 08:35:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:43,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 08:35:43,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 618 proven. 287 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-10-28 08:35:43,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685138546] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:43,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:35:43,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-10-28 08:35:43,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222518477] [2021-10-28 08:35:43,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-28 08:35:43,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:43,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-28 08:35:43,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 08:35:43,803 INFO L87 Difference]: Start difference. First operand 770 states and 901 transitions. Second operand has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:44,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:44,172 INFO L93 Difference]: Finished difference Result 1968 states and 2264 transitions. [2021-10-28 08:35:44,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 08:35:44,173 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-10-28 08:35:44,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:44,179 INFO L225 Difference]: With dead ends: 1968 [2021-10-28 08:35:44,179 INFO L226 Difference]: Without dead ends: 1316 [2021-10-28 08:35:44,181 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 08:35:44,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2021-10-28 08:35:44,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 809. [2021-10-28 08:35:44,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 1.1707920792079207) internal successors, (946), 808 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:44,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 946 transitions. [2021-10-28 08:35:44,287 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 946 transitions. Word has length 105 [2021-10-28 08:35:44,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:44,288 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 946 transitions. [2021-10-28 08:35:44,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:44,289 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 946 transitions. [2021-10-28 08:35:44,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-10-28 08:35:44,290 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:44,291 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 26, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:44,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:44,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 08:35:44,515 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:44,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:44,516 INFO L85 PathProgramCache]: Analyzing trace with hash 802849635, now seen corresponding path program 2 times [2021-10-28 08:35:44,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:44,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655711129] [2021-10-28 08:35:44,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:44,516 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 52 proven. 990 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-10-28 08:35:44,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:44,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655711129] [2021-10-28 08:35:44,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655711129] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:44,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220319489] [2021-10-28 08:35:44,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:35:44,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:44,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:44,747 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:44,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 08:35:45,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:35:45,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:35:45,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 08:35:45,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 707 proven. 330 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-10-28 08:35:45,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220319489] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:45,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:35:45,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-10-28 08:35:45,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860877886] [2021-10-28 08:35:45,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 08:35:45,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:45,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 08:35:45,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 08:35:45,907 INFO L87 Difference]: Start difference. First operand 809 states and 946 transitions. Second operand has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:46,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:46,288 INFO L93 Difference]: Finished difference Result 2078 states and 2393 transitions. [2021-10-28 08:35:46,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 08:35:46,288 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-10-28 08:35:46,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:46,293 INFO L225 Difference]: With dead ends: 2078 [2021-10-28 08:35:46,293 INFO L226 Difference]: Without dead ends: 1396 [2021-10-28 08:35:46,294 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 08:35:46,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-10-28 08:35:46,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 866. [2021-10-28 08:35:46,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 1.169942196531792) internal successors, (1012), 865 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:46,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1012 transitions. [2021-10-28 08:35:46,415 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1012 transitions. Word has length 111 [2021-10-28 08:35:46,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:46,415 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1012 transitions. [2021-10-28 08:35:46,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:46,415 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1012 transitions. [2021-10-28 08:35:46,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-10-28 08:35:46,417 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:46,418 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 28, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:46,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:46,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 08:35:46,635 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:46,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:46,635 INFO L85 PathProgramCache]: Analyzing trace with hash -780287697, now seen corresponding path program 3 times [2021-10-28 08:35:46,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:46,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755312161] [2021-10-28 08:35:46,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:46,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 55 proven. 1128 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-10-28 08:35:46,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:46,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755312161] [2021-10-28 08:35:46,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755312161] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:46,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136708407] [2021-10-28 08:35:46,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:35:46,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:46,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:46,854 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:46,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 08:35:47,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 08:35:47,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:35:47,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 08:35:47,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 807 proven. 47 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2021-10-28 08:35:47,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136708407] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:47,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:35:47,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 25 [2021-10-28 08:35:47,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410421656] [2021-10-28 08:35:47,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 08:35:47,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:47,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 08:35:47,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-10-28 08:35:47,685 INFO L87 Difference]: Start difference. First operand 866 states and 1012 transitions. Second operand has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:49,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:49,183 INFO L93 Difference]: Finished difference Result 2428 states and 2841 transitions. [2021-10-28 08:35:49,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-10-28 08:35:49,183 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-10-28 08:35:49,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:49,190 INFO L225 Difference]: With dead ends: 2428 [2021-10-28 08:35:49,190 INFO L226 Difference]: Without dead ends: 1698 [2021-10-28 08:35:49,193 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1816, Invalid=4990, Unknown=0, NotChecked=0, Total=6806 [2021-10-28 08:35:49,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-10-28 08:35:49,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1132. [2021-10-28 08:35:49,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1131 states have (on average 1.1520778072502211) internal successors, (1303), 1131 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:49,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1303 transitions. [2021-10-28 08:35:49,352 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1303 transitions. Word has length 117 [2021-10-28 08:35:49,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:49,352 INFO L470 AbstractCegarLoop]: Abstraction has 1132 states and 1303 transitions. [2021-10-28 08:35:49,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:49,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1303 transitions. [2021-10-28 08:35:49,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-10-28 08:35:49,356 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:49,356 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 20, 14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:49,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:49,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:49,573 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:49,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:49,574 INFO L85 PathProgramCache]: Analyzing trace with hash 840591843, now seen corresponding path program 4 times [2021-10-28 08:35:49,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:49,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866211584] [2021-10-28 08:35:49,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:49,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 984 proven. 0 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2021-10-28 08:35:49,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:49,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866211584] [2021-10-28 08:35:49,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866211584] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:35:49,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:35:49,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 08:35:49,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499955833] [2021-10-28 08:35:49,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:35:49,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:49,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:35:49,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:35:49,626 INFO L87 Difference]: Start difference. First operand 1132 states and 1303 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:49,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:49,835 INFO L93 Difference]: Finished difference Result 1815 states and 2023 transitions. [2021-10-28 08:35:49,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:35:49,836 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-10-28 08:35:49,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:49,843 INFO L225 Difference]: With dead ends: 1815 [2021-10-28 08:35:49,843 INFO L226 Difference]: Without dead ends: 1604 [2021-10-28 08:35:49,844 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:35:49,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-10-28 08:35:50,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1150. [2021-10-28 08:35:50,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 1.154917319408181) internal successors, (1327), 1149 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:50,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1327 transitions. [2021-10-28 08:35:50,018 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1327 transitions. Word has length 123 [2021-10-28 08:35:50,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:50,018 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 1327 transitions. [2021-10-28 08:35:50,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:50,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1327 transitions. [2021-10-28 08:35:50,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-10-28 08:35:50,021 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:50,021 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 19, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:50,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-28 08:35:50,021 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:50,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:50,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1273355935, now seen corresponding path program 5 times [2021-10-28 08:35:50,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:50,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092120507] [2021-10-28 08:35:50,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:50,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 903 proven. 425 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-10-28 08:35:50,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:50,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092120507] [2021-10-28 08:35:50,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092120507] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:50,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237429113] [2021-10-28 08:35:50,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 08:35:50,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:50,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:50,282 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:50,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 08:35:50,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-10-28 08:35:50,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:35:50,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 08:35:50,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:51,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 1159 proven. 338 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-10-28 08:35:51,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237429113] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:51,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:35:51,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 42 [2021-10-28 08:35:51,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890047387] [2021-10-28 08:35:51,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-28 08:35:51,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:51,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-28 08:35:51,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1341, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 08:35:51,597 INFO L87 Difference]: Start difference. First operand 1150 states and 1327 transitions. Second operand has 42 states, 42 states have (on average 3.4761904761904763) internal successors, (146), 42 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:53,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:53,108 INFO L93 Difference]: Finished difference Result 2896 states and 3293 transitions. [2021-10-28 08:35:53,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-10-28 08:35:53,108 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.4761904761904763) internal successors, (146), 42 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-10-28 08:35:53,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:53,116 INFO L225 Difference]: With dead ends: 2896 [2021-10-28 08:35:53,116 INFO L226 Difference]: Without dead ends: 1893 [2021-10-28 08:35:53,121 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2477 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2087, Invalid=7033, Unknown=0, NotChecked=0, Total=9120 [2021-10-28 08:35:53,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-10-28 08:35:53,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1123. [2021-10-28 08:35:53,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1122 states have (on average 1.1452762923351159) internal successors, (1285), 1122 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:53,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1285 transitions. [2021-10-28 08:35:53,246 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1285 transitions. Word has length 123 [2021-10-28 08:35:53,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:53,246 INFO L470 AbstractCegarLoop]: Abstraction has 1123 states and 1285 transitions. [2021-10-28 08:35:53,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.4761904761904763) internal successors, (146), 42 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:53,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1285 transitions. [2021-10-28 08:35:53,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-10-28 08:35:53,249 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:53,249 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 21, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:53,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:53,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:53,463 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:53,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:53,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1151168365, now seen corresponding path program 6 times [2021-10-28 08:35:53,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:53,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488804119] [2021-10-28 08:35:53,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:53,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 1010 proven. 477 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2021-10-28 08:35:53,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:53,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488804119] [2021-10-28 08:35:53,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488804119] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:53,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376261409] [2021-10-28 08:35:53,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 08:35:53,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:53,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:53,713 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:53,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 08:35:54,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-28 08:35:54,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:35:54,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 08:35:54,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 228 proven. 1027 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-10-28 08:35:55,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376261409] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:55,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:35:55,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 29 [2021-10-28 08:35:55,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277696598] [2021-10-28 08:35:55,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 08:35:55,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:55,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 08:35:55,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-10-28 08:35:55,380 INFO L87 Difference]: Start difference. First operand 1123 states and 1285 transitions. Second operand has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:57,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:57,987 INFO L93 Difference]: Finished difference Result 2474 states and 2859 transitions. [2021-10-28 08:35:57,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-10-28 08:35:57,989 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-10-28 08:35:57,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:57,995 INFO L225 Difference]: With dead ends: 2474 [2021-10-28 08:35:57,995 INFO L226 Difference]: Without dead ends: 1496 [2021-10-28 08:35:58,000 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5530 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3495, Invalid=13535, Unknown=0, NotChecked=0, Total=17030 [2021-10-28 08:35:58,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-10-28 08:35:58,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1254. [2021-10-28 08:35:58,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 1.1524341580207502) internal successors, (1444), 1253 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:58,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1444 transitions. [2021-10-28 08:35:58,126 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1444 transitions. Word has length 129 [2021-10-28 08:35:58,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:58,127 INFO L470 AbstractCegarLoop]: Abstraction has 1254 states and 1444 transitions. [2021-10-28 08:35:58,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:35:58,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1444 transitions. [2021-10-28 08:35:58,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-10-28 08:35:58,129 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:58,130 INFO L513 BasicCegarLoop]: trace histogram [39, 39, 37, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:35:58,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:58,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:58,353 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:35:58,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:58,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2144366173, now seen corresponding path program 1 times [2021-10-28 08:35:58,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:58,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114011576] [2021-10-28 08:35:58,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:58,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2309 backedges. 1182 proven. 590 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-10-28 08:35:58,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:58,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114011576] [2021-10-28 08:35:58,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114011576] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:58,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351853226] [2021-10-28 08:35:58,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:58,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:58,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:58,654 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:58,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 08:35:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:59,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 08:35:59,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:36:00,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2309 backedges. 1181 proven. 590 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2021-10-28 08:36:00,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351853226] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:00,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:36:00,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-10-28 08:36:00,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487635686] [2021-10-28 08:36:00,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-28 08:36:00,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:36:00,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-28 08:36:00,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2021-10-28 08:36:00,101 INFO L87 Difference]: Start difference. First operand 1254 states and 1444 transitions. Second operand has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 45 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:01,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:36:01,044 INFO L93 Difference]: Finished difference Result 2876 states and 3425 transitions. [2021-10-28 08:36:01,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-28 08:36:01,045 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 45 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-10-28 08:36:01,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:36:01,053 INFO L225 Difference]: With dead ends: 2876 [2021-10-28 08:36:01,053 INFO L226 Difference]: Without dead ends: 1781 [2021-10-28 08:36:01,057 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1654, Invalid=3748, Unknown=0, NotChecked=0, Total=5402 [2021-10-28 08:36:01,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-10-28 08:36:01,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1496. [2021-10-28 08:36:01,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 1.1812709030100335) internal successors, (1766), 1495 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:01,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 1766 transitions. [2021-10-28 08:36:01,215 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 1766 transitions. Word has length 138 [2021-10-28 08:36:01,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:36:01,216 INFO L470 AbstractCegarLoop]: Abstraction has 1496 states and 1766 transitions. [2021-10-28 08:36:01,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 45 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:01,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 1766 transitions. [2021-10-28 08:36:01,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-10-28 08:36:01,218 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:36:01,219 INFO L513 BasicCegarLoop]: trace histogram [42, 42, 40, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:36:01,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 08:36:01,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-28 08:36:01,447 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:36:01,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:36:01,447 INFO L85 PathProgramCache]: Analyzing trace with hash 297433953, now seen corresponding path program 2 times [2021-10-28 08:36:01,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:36:01,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223253488] [2021-10-28 08:36:01,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:36:01,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:36:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:01,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 1368 proven. 651 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2021-10-28 08:36:01,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:36:01,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223253488] [2021-10-28 08:36:01,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223253488] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:01,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229001981] [2021-10-28 08:36:01,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:36:01,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:36:01,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:36:01,812 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:36:01,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 08:36:02,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:36:02,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:36:02,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 08:36:02,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:36:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 6 proven. 1975 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2021-10-28 08:36:03,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229001981] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:03,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:36:03,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-10-28 08:36:03,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806028990] [2021-10-28 08:36:03,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-28 08:36:03,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:36:03,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-28 08:36:03,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=1561, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 08:36:03,560 INFO L87 Difference]: Start difference. First operand 1496 states and 1766 transitions. Second operand has 49 states, 49 states have (on average 3.2857142857142856) internal successors, (161), 48 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:04,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:36:04,175 INFO L93 Difference]: Finished difference Result 2748 states and 3281 transitions. [2021-10-28 08:36:04,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-10-28 08:36:04,176 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.2857142857142856) internal successors, (161), 48 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-10-28 08:36:04,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:36:04,183 INFO L225 Difference]: With dead ends: 2748 [2021-10-28 08:36:04,184 INFO L226 Difference]: Without dead ends: 1869 [2021-10-28 08:36:04,185 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1575, Invalid=3395, Unknown=0, NotChecked=0, Total=4970 [2021-10-28 08:36:04,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2021-10-28 08:36:04,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1506. [2021-10-28 08:36:04,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.1847176079734218) internal successors, (1783), 1505 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:04,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 1783 transitions. [2021-10-28 08:36:04,358 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 1783 transitions. Word has length 147 [2021-10-28 08:36:04,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:36:04,358 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 1783 transitions. [2021-10-28 08:36:04,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.2857142857142856) internal successors, (161), 48 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:04,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 1783 transitions. [2021-10-28 08:36:04,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-10-28 08:36:04,362 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:36:04,362 INFO L513 BasicCegarLoop]: trace histogram [42, 42, 42, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:36:04,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-28 08:36:04,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:36:04,579 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:36:04,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:36:04,579 INFO L85 PathProgramCache]: Analyzing trace with hash -758927133, now seen corresponding path program 1 times [2021-10-28 08:36:04,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:36:04,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017557796] [2021-10-28 08:36:04,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:36:04,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:36:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 2 proven. 1371 refuted. 0 times theorem prover too weak. 1302 trivial. 0 not checked. [2021-10-28 08:36:04,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:36:04,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017557796] [2021-10-28 08:36:04,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017557796] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:04,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638313850] [2021-10-28 08:36:04,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:36:04,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:36:04,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:36:04,668 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:36:04,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 08:36:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:05,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 08:36:05,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:36:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 1367 proven. 651 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2021-10-28 08:36:06,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638313850] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:06,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:36:06,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 24] total 27 [2021-10-28 08:36:06,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893666242] [2021-10-28 08:36:06,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 08:36:06,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:36:06,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 08:36:06,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=446, Unknown=0, NotChecked=0, Total=756 [2021-10-28 08:36:06,238 INFO L87 Difference]: Start difference. First operand 1506 states and 1783 transitions. Second operand has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:07,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:36:07,912 INFO L93 Difference]: Finished difference Result 3583 states and 4220 transitions. [2021-10-28 08:36:07,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-10-28 08:36:07,912 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-10-28 08:36:07,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:36:07,920 INFO L225 Difference]: With dead ends: 3583 [2021-10-28 08:36:07,920 INFO L226 Difference]: Without dead ends: 2342 [2021-10-28 08:36:07,922 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2346 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2973, Invalid=6147, Unknown=0, NotChecked=0, Total=9120 [2021-10-28 08:36:07,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2021-10-28 08:36:08,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1721. [2021-10-28 08:36:08,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 1.1808139534883721) internal successors, (2031), 1720 states have internal predecessors, (2031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:08,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 2031 transitions. [2021-10-28 08:36:08,099 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 2031 transitions. Word has length 147 [2021-10-28 08:36:08,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:36:08,100 INFO L470 AbstractCegarLoop]: Abstraction has 1721 states and 2031 transitions. [2021-10-28 08:36:08,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:08,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 2031 transitions. [2021-10-28 08:36:08,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-10-28 08:36:08,102 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:36:08,102 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 42, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:36:08,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-28 08:36:08,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-28 08:36:08,320 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:36:08,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:36:08,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1034830995, now seen corresponding path program 3 times [2021-10-28 08:36:08,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:36:08,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131197365] [2021-10-28 08:36:08,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:36:08,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:36:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2934 backedges. 1499 proven. 715 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2021-10-28 08:36:08,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:36:08,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131197365] [2021-10-28 08:36:08,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131197365] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:08,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486104310] [2021-10-28 08:36:08,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:36:08,670 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:36:08,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:36:08,675 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:36:08,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-28 08:36:09,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 08:36:09,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:36:09,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 08:36:09,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:36:10,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2934 backedges. 0 proven. 1504 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2021-10-28 08:36:10,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486104310] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:10,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:36:10,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 34 [2021-10-28 08:36:10,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606122775] [2021-10-28 08:36:10,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-28 08:36:10,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:36:10,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-28 08:36:10,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=823, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 08:36:10,780 INFO L87 Difference]: Start difference. First operand 1721 states and 2031 transitions. Second operand has 34 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 34 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:15,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:36:15,218 INFO L93 Difference]: Finished difference Result 3442 states and 4091 transitions. [2021-10-28 08:36:15,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-10-28 08:36:15,219 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 34 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-10-28 08:36:15,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:36:15,228 INFO L225 Difference]: With dead ends: 3442 [2021-10-28 08:36:15,228 INFO L226 Difference]: Without dead ends: 2356 [2021-10-28 08:36:15,232 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11383 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5990, Invalid=26952, Unknown=0, NotChecked=0, Total=32942 [2021-10-28 08:36:15,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-10-28 08:36:15,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 1810. [2021-10-28 08:36:15,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 1.1774461028192371) internal successors, (2130), 1809 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:15,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 2130 transitions. [2021-10-28 08:36:15,404 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 2130 transitions. Word has length 153 [2021-10-28 08:36:15,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:36:15,404 INFO L470 AbstractCegarLoop]: Abstraction has 1810 states and 2130 transitions. [2021-10-28 08:36:15,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 34 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:15,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 2130 transitions. [2021-10-28 08:36:15,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-10-28 08:36:15,407 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:36:15,407 INFO L513 BasicCegarLoop]: trace histogram [45, 45, 44, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:36:15,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-10-28 08:36:15,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:36:15,623 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:36:15,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:36:15,623 INFO L85 PathProgramCache]: Analyzing trace with hash 882596709, now seen corresponding path program 1 times [2021-10-28 08:36:15,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:36:15,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080074912] [2021-10-28 08:36:15,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:36:15,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:36:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3068 backedges. 1565 proven. 715 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-10-28 08:36:15,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:36:15,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080074912] [2021-10-28 08:36:15,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080074912] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:15,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671040042] [2021-10-28 08:36:15,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:36:15,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:36:15,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:36:15,975 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:36:15,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-28 08:36:17,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:17,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 08:36:17,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:36:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3068 backedges. 1565 proven. 715 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-10-28 08:36:17,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671040042] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:17,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:36:17,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-10-28 08:36:17,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517830166] [2021-10-28 08:36:17,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-28 08:36:17,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:36:17,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-28 08:36:17,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=1429, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 08:36:17,890 INFO L87 Difference]: Start difference. First operand 1810 states and 2130 transitions. Second operand has 49 states, 49 states have (on average 3.183673469387755) internal successors, (156), 48 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:18,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:36:18,152 INFO L93 Difference]: Finished difference Result 3392 states and 4017 transitions. [2021-10-28 08:36:18,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 08:36:18,153 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.183673469387755) internal successors, (156), 48 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-10-28 08:36:18,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:36:18,161 INFO L225 Difference]: With dead ends: 3392 [2021-10-28 08:36:18,161 INFO L226 Difference]: Without dead ends: 1936 [2021-10-28 08:36:18,164 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=923, Invalid=1429, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 08:36:18,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-10-28 08:36:18,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1869. [2021-10-28 08:36:18,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.1734475374732334) internal successors, (2192), 1868 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2192 transitions. [2021-10-28 08:36:18,331 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2192 transitions. Word has length 156 [2021-10-28 08:36:18,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:36:18,332 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 2192 transitions. [2021-10-28 08:36:18,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.183673469387755) internal successors, (156), 48 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:18,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2192 transitions. [2021-10-28 08:36:18,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-10-28 08:36:18,335 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:36:18,335 INFO L513 BasicCegarLoop]: trace histogram [46, 46, 45, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:36:18,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-28 08:36:18,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:36:18,559 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:36:18,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:36:18,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1319566561, now seen corresponding path program 2 times [2021-10-28 08:36:18,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:36:18,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976889370] [2021-10-28 08:36:18,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:36:18,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:36:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3205 backedges. 1636 proven. 782 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2021-10-28 08:36:18,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:36:18,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976889370] [2021-10-28 08:36:18,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976889370] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:18,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033016318] [2021-10-28 08:36:18,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:36:18,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:36:18,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:36:18,903 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:36:18,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-28 08:36:19,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:36:19,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:36:19,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-28 08:36:19,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:36:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3205 backedges. 1635 proven. 782 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-10-28 08:36:20,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033016318] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:20,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:36:20,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 51 [2021-10-28 08:36:20,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548584492] [2021-10-28 08:36:20,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-28 08:36:20,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:36:20,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-28 08:36:20,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=1698, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 08:36:20,749 INFO L87 Difference]: Start difference. First operand 1869 states and 2192 transitions. Second operand has 52 states, 52 states have (on average 3.1153846153846154) internal successors, (162), 51 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:21,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:36:21,645 INFO L93 Difference]: Finished difference Result 4186 states and 5017 transitions. [2021-10-28 08:36:21,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-10-28 08:36:21,645 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.1153846153846154) internal successors, (162), 51 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2021-10-28 08:36:21,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:36:21,654 INFO L225 Difference]: With dead ends: 4186 [2021-10-28 08:36:21,654 INFO L226 Difference]: Without dead ends: 2509 [2021-10-28 08:36:21,657 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1964 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2098, Invalid=4708, Unknown=0, NotChecked=0, Total=6806 [2021-10-28 08:36:21,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-10-28 08:36:21,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 1941. [2021-10-28 08:36:21,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 1.172680412371134) internal successors, (2275), 1940 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:21,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 2275 transitions. [2021-10-28 08:36:21,824 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 2275 transitions. Word has length 159 [2021-10-28 08:36:21,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:36:21,824 INFO L470 AbstractCegarLoop]: Abstraction has 1941 states and 2275 transitions. [2021-10-28 08:36:21,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.1153846153846154) internal successors, (162), 51 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:21,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 2275 transitions. [2021-10-28 08:36:21,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-10-28 08:36:21,826 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:36:21,826 INFO L513 BasicCegarLoop]: trace histogram [48, 48, 47, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:36:21,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-28 08:36:22,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-28 08:36:22,028 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:36:22,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:36:22,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1553693227, now seen corresponding path program 3 times [2021-10-28 08:36:22,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:36:22,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927143501] [2021-10-28 08:36:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:36:22,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:36:22,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 1779 proven. 852 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2021-10-28 08:36:22,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:36:22,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927143501] [2021-10-28 08:36:22,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927143501] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:22,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012626063] [2021-10-28 08:36:22,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:36:22,465 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:36:22,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:36:22,466 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:36:22,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-28 08:36:23,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 08:36:23,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:36:23,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 08:36:23,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:36:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 3386 trivial. 0 not checked. [2021-10-28 08:36:24,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012626063] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:36:24,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:36:24,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [28] total 32 [2021-10-28 08:36:24,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592587874] [2021-10-28 08:36:24,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:36:24,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:36:24,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:36:24,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=653, Unknown=0, NotChecked=0, Total=992 [2021-10-28 08:36:24,021 INFO L87 Difference]: Start difference. First operand 1941 states and 2275 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:24,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:36:24,180 INFO L93 Difference]: Finished difference Result 2712 states and 3137 transitions. [2021-10-28 08:36:24,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:36:24,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-10-28 08:36:24,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:36:24,184 INFO L225 Difference]: With dead ends: 2712 [2021-10-28 08:36:24,184 INFO L226 Difference]: Without dead ends: 1328 [2021-10-28 08:36:24,185 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 08:36:24,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2021-10-28 08:36:24,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1178. [2021-10-28 08:36:24,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1177 states have (on average 1.1257434154630417) internal successors, (1325), 1177 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:24,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1325 transitions. [2021-10-28 08:36:24,333 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1325 transitions. Word has length 165 [2021-10-28 08:36:24,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:36:24,333 INFO L470 AbstractCegarLoop]: Abstraction has 1178 states and 1325 transitions. [2021-10-28 08:36:24,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:24,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1325 transitions. [2021-10-28 08:36:24,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-10-28 08:36:24,335 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:36:24,336 INFO L513 BasicCegarLoop]: trace histogram [48, 48, 47, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:36:24,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-10-28 08:36:24,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:36:24,536 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:36:24,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:36:24,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1555540269, now seen corresponding path program 7 times [2021-10-28 08:36:24,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:36:24,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031465996] [2021-10-28 08:36:24,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:36:24,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:36:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:25,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 913 proven. 2575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:36:25,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:36:25,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031465996] [2021-10-28 08:36:25,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031465996] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:25,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416397831] [2021-10-28 08:36:25,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 08:36:25,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:36:25,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:36:25,331 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:36:25,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-28 08:36:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:26,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 08:36:26,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:36:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 1778 proven. 852 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2021-10-28 08:36:27,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416397831] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:27,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:36:27,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 27] total 77 [2021-10-28 08:36:27,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309652174] [2021-10-28 08:36:27,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-10-28 08:36:27,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:36:27,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-10-28 08:36:27,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1329, Invalid=4523, Unknown=0, NotChecked=0, Total=5852 [2021-10-28 08:36:27,586 INFO L87 Difference]: Start difference. First operand 1178 states and 1325 transitions. Second operand has 77 states, 77 states have (on average 3.220779220779221) internal successors, (248), 77 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:29,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:36:29,139 INFO L93 Difference]: Finished difference Result 2412 states and 2752 transitions. [2021-10-28 08:36:29,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-10-28 08:36:29,139 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.220779220779221) internal successors, (248), 77 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-10-28 08:36:29,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:36:29,143 INFO L225 Difference]: With dead ends: 2412 [2021-10-28 08:36:29,143 INFO L226 Difference]: Without dead ends: 1441 [2021-10-28 08:36:29,146 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4685 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4308, Invalid=12204, Unknown=0, NotChecked=0, Total=16512 [2021-10-28 08:36:29,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2021-10-28 08:36:29,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 1211. [2021-10-28 08:36:29,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 1.1231404958677687) internal successors, (1359), 1210 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:29,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1359 transitions. [2021-10-28 08:36:29,330 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1359 transitions. Word has length 165 [2021-10-28 08:36:29,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:36:29,331 INFO L470 AbstractCegarLoop]: Abstraction has 1211 states and 1359 transitions. [2021-10-28 08:36:29,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.220779220779221) internal successors, (248), 77 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:29,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1359 transitions. [2021-10-28 08:36:29,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-10-28 08:36:29,332 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:36:29,332 INFO L513 BasicCegarLoop]: trace histogram [50, 50, 49, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:36:29,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-28 08:36:29,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-28 08:36:29,533 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:36:29,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:36:29,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1830883295, now seen corresponding path program 8 times [2021-10-28 08:36:29,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:36:29,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809600281] [2021-10-28 08:36:29,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:36:29,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:36:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:30,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 988 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:36:30,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:36:30,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809600281] [2021-10-28 08:36:30,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809600281] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:30,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212455084] [2021-10-28 08:36:30,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:36:30,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:36:30,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:36:30,399 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:36:30,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-28 08:36:31,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:36:31,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:36:31,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 08:36:31,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:36:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 1927 proven. 925 refuted. 0 times theorem prover too weak. 931 trivial. 0 not checked. [2021-10-28 08:36:32,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212455084] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:32,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:36:32,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 28] total 80 [2021-10-28 08:36:32,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581915068] [2021-10-28 08:36:32,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-10-28 08:36:32,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:36:32,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-10-28 08:36:32,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1434, Invalid=4886, Unknown=0, NotChecked=0, Total=6320 [2021-10-28 08:36:32,736 INFO L87 Difference]: Start difference. First operand 1211 states and 1359 transitions. Second operand has 80 states, 80 states have (on average 3.2125) internal successors, (257), 80 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:34,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:36:34,317 INFO L93 Difference]: Finished difference Result 2481 states and 2824 transitions. [2021-10-28 08:36:34,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-10-28 08:36:34,317 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.2125) internal successors, (257), 80 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2021-10-28 08:36:34,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:36:34,320 INFO L225 Difference]: With dead ends: 2481 [2021-10-28 08:36:34,320 INFO L226 Difference]: Without dead ends: 1486 [2021-10-28 08:36:34,323 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5068 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4649, Invalid=13173, Unknown=0, NotChecked=0, Total=17822 [2021-10-28 08:36:34,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2021-10-28 08:36:34,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1433. [2021-10-28 08:36:34,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 1.1410614525139664) internal successors, (1634), 1432 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:34,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 1634 transitions. [2021-10-28 08:36:34,470 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 1634 transitions. Word has length 171 [2021-10-28 08:36:34,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:36:34,470 INFO L470 AbstractCegarLoop]: Abstraction has 1433 states and 1634 transitions. [2021-10-28 08:36:34,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.2125) internal successors, (257), 80 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:34,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 1634 transitions. [2021-10-28 08:36:34,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-10-28 08:36:34,472 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:36:34,472 INFO L513 BasicCegarLoop]: trace histogram [52, 52, 51, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:36:34,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-28 08:36:34,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-28 08:36:34,679 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:36:34,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:36:34,679 INFO L85 PathProgramCache]: Analyzing trace with hash 505372205, now seen corresponding path program 9 times [2021-10-28 08:36:34,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:36:34,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392083254] [2021-10-28 08:36:34,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:36:34,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:36:34,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4090 backedges. 1066 proven. 3024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:36:35,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:36:35,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392083254] [2021-10-28 08:36:35,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392083254] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:35,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48810827] [2021-10-28 08:36:35,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:36:35,674 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:36:35,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:36:35,676 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:36:35,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-28 08:36:36,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 08:36:36,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:36:36,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 08:36:36,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:36:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4090 backedges. 2088 proven. 51 refuted. 0 times theorem prover too weak. 1951 trivial. 0 not checked. [2021-10-28 08:36:37,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48810827] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:37,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:36:37,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 7] total 60 [2021-10-28 08:36:37,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147520639] [2021-10-28 08:36:37,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-10-28 08:36:37,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:36:37,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-10-28 08:36:37,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=795, Invalid=2745, Unknown=0, NotChecked=0, Total=3540 [2021-10-28 08:36:37,422 INFO L87 Difference]: Start difference. First operand 1433 states and 1634 transitions. Second operand has 60 states, 60 states have (on average 3.2666666666666666) internal successors, (196), 60 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:47,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:36:47,143 INFO L93 Difference]: Finished difference Result 2528 states and 2889 transitions. [2021-10-28 08:36:47,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 319 states. [2021-10-28 08:36:47,144 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.2666666666666666) internal successors, (196), 60 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-10-28 08:36:47,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:36:47,146 INFO L225 Difference]: With dead ends: 2528 [2021-10-28 08:36:47,147 INFO L226 Difference]: Without dead ends: 1913 [2021-10-28 08:36:47,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47218 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=22272, Invalid=99180, Unknown=0, NotChecked=0, Total=121452 [2021-10-28 08:36:47,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-10-28 08:36:47,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1807. [2021-10-28 08:36:47,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1806 states have (on average 1.1450719822812847) internal successors, (2068), 1806 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:47,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2068 transitions. [2021-10-28 08:36:47,279 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2068 transitions. Word has length 177 [2021-10-28 08:36:47,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:36:47,279 INFO L470 AbstractCegarLoop]: Abstraction has 1807 states and 2068 transitions. [2021-10-28 08:36:47,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.2666666666666666) internal successors, (196), 60 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:47,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2068 transitions. [2021-10-28 08:36:47,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-10-28 08:36:47,283 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:36:47,284 INFO L513 BasicCegarLoop]: trace histogram [78, 78, 75, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 08:36:47,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-28 08:36:47,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-28 08:36:47,511 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:36:47,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:36:47,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1331899705, now seen corresponding path program 4 times [2021-10-28 08:36:47,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:36:47,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097672440] [2021-10-28 08:36:47,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:36:47,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:36:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:47,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9267 backedges. 4164 proven. 1001 refuted. 0 times theorem prover too weak. 4102 trivial. 0 not checked. [2021-10-28 08:36:47,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:36:47,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097672440] [2021-10-28 08:36:47,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097672440] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:47,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120951530] [2021-10-28 08:36:47,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 08:36:47,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:36:47,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:36:47,933 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:36:47,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-28 08:36:49,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 08:36:49,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:36:49,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 74 conjunts are in the unsatisfiable core [2021-10-28 08:36:49,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:36:53,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9267 backedges. 925 proven. 7341 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2021-10-28 08:36:53,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120951530] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:53,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:36:53,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 62] total 90 [2021-10-28 08:36:53,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147065128] [2021-10-28 08:36:53,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-10-28 08:36:53,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:36:53,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-10-28 08:36:53,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1261, Invalid=6749, Unknown=0, NotChecked=0, Total=8010 [2021-10-28 08:36:53,696 INFO L87 Difference]: Start difference. First operand 1807 states and 2068 transitions. Second operand has 90 states, 90 states have (on average 3.1777777777777776) internal successors, (286), 90 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:57,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:36:57,688 INFO L93 Difference]: Finished difference Result 3488 states and 4035 transitions. [2021-10-28 08:36:57,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-10-28 08:36:57,688 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.1777777777777776) internal successors, (286), 90 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2021-10-28 08:36:57,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:36:57,691 INFO L225 Difference]: With dead ends: 3488 [2021-10-28 08:36:57,691 INFO L226 Difference]: Without dead ends: 2293 [2021-10-28 08:36:57,694 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13421 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6210, Invalid=33590, Unknown=0, NotChecked=0, Total=39800 [2021-10-28 08:36:57,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2021-10-28 08:36:57,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 1662. [2021-10-28 08:36:57,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 1.1523178807947019) internal successors, (1914), 1661 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:57,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 1914 transitions. [2021-10-28 08:36:57,825 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 1914 transitions. Word has length 263 [2021-10-28 08:36:57,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:36:57,825 INFO L470 AbstractCegarLoop]: Abstraction has 1662 states and 1914 transitions. [2021-10-28 08:36:57,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.1777777777777776) internal successors, (286), 90 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:36:57,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 1914 transitions. [2021-10-28 08:36:57,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-10-28 08:36:57,828 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:36:57,828 INFO L513 BasicCegarLoop]: trace histogram [81, 81, 78, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 08:36:57,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-10-28 08:36:58,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:36:58,029 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:36:58,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:36:58,029 INFO L85 PathProgramCache]: Analyzing trace with hash -282690071, now seen corresponding path program 5 times [2021-10-28 08:36:58,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:36:58,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468712233] [2021-10-28 08:36:58,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:36:58,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:36:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:58,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9987 backedges. 4486 proven. 1080 refuted. 0 times theorem prover too weak. 4421 trivial. 0 not checked. [2021-10-28 08:36:58,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:36:58,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468712233] [2021-10-28 08:36:58,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468712233] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:58,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368038090] [2021-10-28 08:36:58,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 08:36:58,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:36:58,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:36:58,522 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:36:58,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-28 08:37:00,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 56 check-sat command(s) [2021-10-28 08:37:00,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:37:00,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 08:37:00,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:37:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9987 backedges. 4486 proven. 1080 refuted. 0 times theorem prover too weak. 4421 trivial. 0 not checked. [2021-10-28 08:37:01,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368038090] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:01,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:37:01,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2021-10-28 08:37:01,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975569234] [2021-10-28 08:37:01,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-10-28 08:37:01,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:37:01,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-10-28 08:37:01,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1333, Invalid=2089, Unknown=0, NotChecked=0, Total=3422 [2021-10-28 08:37:01,323 INFO L87 Difference]: Start difference. First operand 1662 states and 1914 transitions. Second operand has 59 states, 59 states have (on average 3.1186440677966103) internal successors, (184), 58 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:37:01,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:37:01,649 INFO L93 Difference]: Finished difference Result 3197 states and 3696 transitions. [2021-10-28 08:37:01,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-28 08:37:01,650 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.1186440677966103) internal successors, (184), 58 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 272 [2021-10-28 08:37:01,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:37:01,652 INFO L225 Difference]: With dead ends: 3197 [2021-10-28 08:37:01,652 INFO L226 Difference]: Without dead ends: 1782 [2021-10-28 08:37:01,654 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1333, Invalid=2089, Unknown=0, NotChecked=0, Total=3422 [2021-10-28 08:37:01,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2021-10-28 08:37:01,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1725. [2021-10-28 08:37:01,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1724 states have (on average 1.148491879350348) internal successors, (1980), 1724 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:37:01,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 1980 transitions. [2021-10-28 08:37:01,838 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 1980 transitions. Word has length 272 [2021-10-28 08:37:01,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:37:01,838 INFO L470 AbstractCegarLoop]: Abstraction has 1725 states and 1980 transitions. [2021-10-28 08:37:01,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.1186440677966103) internal successors, (184), 58 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:37:01,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 1980 transitions. [2021-10-28 08:37:01,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-10-28 08:37:01,841 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:37:01,841 INFO L513 BasicCegarLoop]: trace histogram [84, 84, 81, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 08:37:01,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-10-28 08:37:02,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-10-28 08:37:02,042 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:37:02,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:37:02,042 INFO L85 PathProgramCache]: Analyzing trace with hash -407080135, now seen corresponding path program 6 times [2021-10-28 08:37:02,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:37:02,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774944194] [2021-10-28 08:37:02,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:02,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:37:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10734 backedges. 4820 proven. 1162 refuted. 0 times theorem prover too weak. 4752 trivial. 0 not checked. [2021-10-28 08:37:02,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:37:02,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774944194] [2021-10-28 08:37:02,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774944194] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:02,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140114138] [2021-10-28 08:37:02,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 08:37:02,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:37:02,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:37:02,495 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:37:02,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-28 08:37:04,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-28 08:37:04,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:37:04,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 08:37:04,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:37:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10734 backedges. 4914 proven. 1 refuted. 0 times theorem prover too weak. 5819 trivial. 0 not checked. [2021-10-28 08:37:04,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140114138] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:04,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:37:04,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 8] total 38 [2021-10-28 08:37:04,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186771686] [2021-10-28 08:37:04,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-28 08:37:04,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:37:04,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-28 08:37:04,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=921, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 08:37:04,828 INFO L87 Difference]: Start difference. First operand 1725 states and 1980 transitions. Second operand has 38 states, 38 states have (on average 3.6052631578947367) internal successors, (137), 38 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:37:06,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:37:06,946 INFO L93 Difference]: Finished difference Result 3341 states and 3870 transitions. [2021-10-28 08:37:06,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-10-28 08:37:06,947 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.6052631578947367) internal successors, (137), 38 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 281 [2021-10-28 08:37:06,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:37:06,947 INFO L225 Difference]: With dead ends: 3341 [2021-10-28 08:37:06,947 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 08:37:06,950 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3231, Invalid=7071, Unknown=0, NotChecked=0, Total=10302 [2021-10-28 08:37:06,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 08:37:06,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 08:37:06,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:37:06,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 08:37:06,951 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 281 [2021-10-28 08:37:06,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:37:06,951 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 08:37:06,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.6052631578947367) internal successors, (137), 38 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:37:06,951 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 08:37:06,952 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 08:37:06,954 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 08:37:06,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-28 08:37:07,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:37:07,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-28 08:37:07,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:38:10,114 WARN L207 SmtUtils]: Spent 1.05 m on a formula simplification. DAG size of input: 5989 DAG size of output: 3713 [2021-10-28 08:38:10,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:38:10,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:40:24,245 WARN L207 SmtUtils]: Spent 2.23 m on a formula simplification. DAG size of input: 3366 DAG size of output: 301 [2021-10-28 08:40:24,667 INFO L857 garLoopResultBuilder]: For program point L27-2(lines 27 29) no Hoare annotation was computed. [2021-10-28 08:40:24,668 INFO L853 garLoopResultBuilder]: At program point L27-3(lines 27 29) the Hoare annotation is: (let ((.cse13 (+ ~last~0 1)) (.cse14 (<= (+ ULTIMATE.start_main_~d~0 199998) ~SIZE~0)) (.cse15 (<= (+ ~last~0 199978) ~SIZE~0)) (.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse2 (= ULTIMATE.start_main_~d~0 0)) (.cse3 (< 0 ~last~0)) (.cse5 (= ULTIMATE.start_main_~st~0 1))) (let ((.cse11 (<= ULTIMATE.start_main_~c~0 21)) (.cse20 (<= ULTIMATE.start_main_~c~0 10)) (.cse21 (<= ~last~0 23)) (.cse22 (= ULTIMATE.start_main_~c~0 0)) (.cse16 (<= ULTIMATE.start_main_~c~0 7)) (.cse28 (<= ULTIMATE.start_main_~c~0 13)) (.cse4 (<= ULTIMATE.start_main_~c~0 1)) (.cse23 (<= 3 ULTIMATE.start_main_~c~0)) (.cse24 (<= ULTIMATE.start_main_~c~0 3)) (.cse17 (<= ULTIMATE.start_main_~c~0 5)) (.cse26 (<= ULTIMATE.start_main_~c~0 12)) (.cse25 (<= ULTIMATE.start_main_~c~0 19)) (.cse27 (<= ULTIMATE.start_main_~c~0 20)) (.cse7 (or (and .cse0 .cse14 .cse15 .cse3 .cse5) (and .cse0 .cse2 .cse3 .cse5))) (.cse8 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse9 (< ULTIMATE.start_main_~c~0 .cse13)) (.cse12 (< ULTIMATE.start_main_~c~0 (+ ~SIZE~0 1))) (.cse1 (= ULTIMATE.start_main_~b~0 0)) (.cse18 (<= .cse13 ULTIMATE.start_main_~c~0)) (.cse19 (= ULTIMATE.start_main_~st~0 0)) (.cse10 (<= 200000 ~SIZE~0)) (.cse6 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0))) (or (and .cse0 .cse1 (<= 1 ULTIMATE.start_main_~c~0) .cse2 .cse3 .cse4 .cse5 .cse6 (<= (+ ULTIMATE.start_main_~c~0 199999) ~SIZE~0)) (and (<= ULTIMATE.start_main_~c~0 14) .cse7 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 9)) .cse8 .cse9 .cse10 .cse6) (and .cse0 .cse1 (<= 21 ULTIMATE.start_main_~c~0) .cse2 .cse9 .cse11 .cse5 .cse10 .cse6) (and (<= ~last~0 (+ ULTIMATE.start_main_~c~0 2)) .cse7 .cse8 .cse9 .cse11 .cse10 .cse6) (and .cse12 .cse0 .cse8 (< ~SIZE~0 .cse13) .cse2 .cse5 .cse10 .cse6) (and .cse0 .cse14 .cse8 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 16)) .cse15 .cse9 .cse3 .cse16 .cse5 .cse10 .cse6) (and .cse0 (<= 5 ULTIMATE.start_main_~c~0) .cse1 .cse17 .cse2 .cse9 .cse5 .cse10 .cse6) (and .cse12 .cse0 .cse8 .cse18 .cse2 .cse19 .cse3 .cse10 .cse6) (and (<= ULTIMATE.start_main_~c~0 4) .cse0 .cse14 (<= ~last~0 (+ 19 ULTIMATE.start_main_~c~0)) .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 .cse2 .cse9 (<= (+ ULTIMATE.start_main_~c~0 199994) ~SIZE~0) (<= 6 ULTIMATE.start_main_~c~0) .cse5 .cse6) (and .cse0 (<= ULTIMATE.start_main_~c~0 15) .cse14 .cse8 .cse15 .cse9 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 8)) .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse14 .cse8 .cse15 .cse9 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 13)) .cse3 .cse5 .cse10 .cse6 .cse20) (and (<= ULTIMATE.start_main_~c~0 2) .cse0 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 21)) .cse14 .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and (<= 24 ULTIMATE.start_main_~c~0) .cse0 .cse1 .cse2 .cse9 (<= ULTIMATE.start_main_~c~0 24) .cse5 .cse10 .cse6) (and .cse0 .cse14 .cse8 .cse15 .cse3 .cse21 .cse5 .cse10 .cse6 .cse22) (and .cse12 .cse0 .cse1 .cse2 .cse9 (<= 25 ULTIMATE.start_main_~c~0) .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= (+ ULTIMATE.start_main_~c~0 199991) ~SIZE~0) .cse2 .cse9 .cse5 .cse6 (<= 9 ULTIMATE.start_main_~c~0)) (and .cse0 .cse14 (<= ~last~0 ULTIMATE.start_main_~c~0) .cse8 (<= ULTIMATE.start_main_~c~0 23) .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= (+ ULTIMATE.start_main_~c~0 199978) ~SIZE~0) .cse2 .cse9 (<= 22 ULTIMATE.start_main_~c~0) .cse5 .cse6) (and .cse0 .cse1 (<= 10 ULTIMATE.start_main_~c~0) .cse2 .cse9 .cse5 .cse10 .cse6 .cse20) (and .cse12 .cse0 .cse14 .cse8 .cse18 .cse15 .cse19 .cse3 .cse21 .cse10 .cse6) (and .cse0 .cse1 .cse2 .cse9 (<= 16 ULTIMATE.start_main_~c~0) .cse5 .cse6 (<= (+ 199984 ULTIMATE.start_main_~c~0) ~SIZE~0)) (and .cse23 .cse0 .cse1 .cse24 .cse2 .cse9 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= (+ ULTIMATE.start_main_~c~0 199986) ~SIZE~0) (<= 14 ULTIMATE.start_main_~c~0) .cse2 .cse9 .cse5 .cse6) (and .cse0 .cse14 .cse8 .cse25 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 4))) (and .cse0 .cse1 (<= 23 ULTIMATE.start_main_~c~0) (<= (+ ULTIMATE.start_main_~c~0 199977) ~SIZE~0) .cse2 .cse9 .cse5 .cse6) (and .cse0 .cse1 .cse2 .cse3 .cse5 .cse10 .cse6 .cse22) (and .cse0 .cse1 (<= 12 ULTIMATE.start_main_~c~0) .cse2 .cse9 .cse26 .cse5 .cse10 .cse6) (and (<= 7 ULTIMATE.start_main_~c~0) .cse0 .cse1 .cse2 .cse9 .cse16 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= 18 ULTIMATE.start_main_~c~0) .cse2 .cse9 (<= (+ ULTIMATE.start_main_~c~0 199982) ~SIZE~0) .cse5 .cse6) (and .cse0 (<= ULTIMATE.start_main_~c~0 8) .cse14 .cse8 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 15)) .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= 11 ULTIMATE.start_main_~c~0) .cse2 .cse9 (<= (+ ULTIMATE.start_main_~c~0 199989) ~SIZE~0) .cse5 .cse6) (and .cse0 .cse1 .cse2 .cse9 .cse27 .cse5 .cse10 (<= 20 ULTIMATE.start_main_~c~0) .cse6) (and .cse0 (<= ULTIMATE.start_main_~c~0 17) .cse14 .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 6))) (and .cse0 .cse14 .cse8 .cse28 .cse15 .cse9 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 10)) .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= 13 ULTIMATE.start_main_~c~0) .cse28 .cse2 .cse9 .cse5 .cse10 .cse6) (and .cse0 (< ULTIMATE.start_main_~c~0 ~SIZE~0) .cse8 .cse2 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse14 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 22)) .cse8 .cse15 .cse3 .cse4 .cse5 .cse10 .cse6) (and (<= ULTIMATE.start_main_~c~0 18) .cse0 .cse14 .cse8 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 5)) .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 .cse2 .cse9 .cse5 .cse6 (<= (+ ULTIMATE.start_main_~c~0 199992) ~SIZE~0) (<= 8 ULTIMATE.start_main_~c~0)) (and .cse0 (<= ULTIMATE.start_main_~c~0 9) .cse14 .cse8 .cse15 .cse9 .cse3 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 14)) .cse5 .cse10 .cse6) (and (<= ULTIMATE.start_main_~c~0 11) .cse0 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 12)) .cse14 .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and (<= ~last~0 (+ ULTIMATE.start_main_~c~0 20)) .cse0 .cse24 .cse14 .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse23 .cse0 (<= ~last~0 3) .cse24 .cse14 .cse8 .cse3 .cse5 .cse10 .cse6) (and (<= ~last~0 (+ ULTIMATE.start_main_~c~0 18)) .cse0 .cse14 .cse17 .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse14 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 17)) .cse8 (<= ULTIMATE.start_main_~c~0 6) .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= (+ ULTIMATE.start_main_~c~0 199983) ~SIZE~0) (<= 17 ULTIMATE.start_main_~c~0) .cse2 .cse9 .cse5 .cse6) (and .cse0 .cse1 .cse2 .cse9 (<= 2 ULTIMATE.start_main_~c~0) (<= (+ ULTIMATE.start_main_~c~0 199998) ~SIZE~0) .cse5 .cse6) (and (<= (+ 199996 ULTIMATE.start_main_~c~0) ~SIZE~0) .cse0 .cse1 .cse2 .cse9 .cse5 .cse6 (<= 4 ULTIMATE.start_main_~c~0)) (and .cse0 .cse1 (<= 15 ULTIMATE.start_main_~c~0) .cse2 .cse9 (<= (+ ULTIMATE.start_main_~c~0 199985) ~SIZE~0) .cse5 .cse6) (and .cse7 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 11)) .cse8 .cse9 .cse26 .cse10 .cse6) (and .cse0 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 1)) (<= ULTIMATE.start_main_~c~0 22) .cse14 .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 .cse2 .cse25 .cse9 (<= 19 ULTIMATE.start_main_~c~0) .cse5 .cse10 .cse6) (and .cse0 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 3)) .cse14 .cse8 .cse15 .cse9 .cse27 .cse3 .cse5 .cse10 .cse6) (and (<= ~last~0 (+ ULTIMATE.start_main_~c~0 7)) (<= ULTIMATE.start_main_~c~0 16) .cse7 .cse8 .cse9 .cse10 .cse6) (and .cse12 .cse0 .cse1 .cse18 .cse2 .cse19 .cse3 .cse10 .cse6)))) [2021-10-28 08:40:24,668 INFO L857 garLoopResultBuilder]: For program point L27-4(lines 25 45) no Hoare annotation was computed. [2021-10-28 08:40:24,668 INFO L857 garLoopResultBuilder]: For program point L11(lines 11 13) no Hoare annotation was computed. [2021-10-28 08:40:24,668 INFO L853 garLoopResultBuilder]: At program point L11-2(lines 10 45) the Hoare annotation is: (let ((.cse0 (< ULTIMATE.start_main_~c~0 (+ ~SIZE~0 1))) (.cse1 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse2 (<= ~SIZE~0 ULTIMATE.start_main_~c~0)) (.cse3 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse7 (= ULTIMATE.start_main_~d~0 0)) (.cse4 (< 0 ~last~0)) (.cse5 (<= 200000 ~SIZE~0)) (.cse6 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0))) (or (and .cse0 .cse1 .cse2 (<= (+ ULTIMATE.start_main_~d~0 199998) ~SIZE~0) .cse3 (<= (+ ~last~0 199978) ~SIZE~0) .cse4 (<= ~last~0 23) .cse5 .cse6) (and .cse1 (= ULTIMATE.start_main_~b~0 0) .cse7 .cse4 .cse5 .cse6 (= ULTIMATE.start_main_~c~0 0)) (and .cse0 .cse1 .cse2 .cse3 .cse7 .cse4 .cse5 .cse6))) [2021-10-28 08:40:24,669 INFO L857 garLoopResultBuilder]: For program point L36(lines 36 38) no Hoare annotation was computed. [2021-10-28 08:40:24,669 INFO L857 garLoopResultBuilder]: For program point L36-2(lines 25 45) no Hoare annotation was computed. [2021-10-28 08:40:24,669 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-28 08:40:24,669 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-28 08:40:24,669 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-28 08:40:24,669 INFO L857 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2021-10-28 08:40:24,669 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-10-28 08:40:24,669 INFO L857 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2021-10-28 08:40:24,669 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-28 08:40:24,669 INFO L857 garLoopResultBuilder]: For program point L25-2(lines 25 45) no Hoare annotation was computed. [2021-10-28 08:40:24,669 INFO L853 garLoopResultBuilder]: At program point L46(lines 20 47) the Hoare annotation is: false [2021-10-28 08:40:24,669 INFO L857 garLoopResultBuilder]: For program point L5(lines 5 7) no Hoare annotation was computed. [2021-10-28 08:40:24,669 INFO L857 garLoopResultBuilder]: For program point L30-1(lines 25 45) no Hoare annotation was computed. [2021-10-28 08:40:24,670 INFO L857 garLoopResultBuilder]: For program point L6(line 6) no Hoare annotation was computed. [2021-10-28 08:40:24,670 INFO L857 garLoopResultBuilder]: For program point L39-1(lines 39 42) no Hoare annotation was computed. [2021-10-28 08:40:24,672 INFO L731 BasicCegarLoop]: Path program histogram: [9, 6, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:40:24,674 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:40:24,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:40:24 BoogieIcfgContainer [2021-10-28 08:40:24,728 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:40:24,728 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:40:24,729 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:40:24,729 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:40:24,729 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:35:23" (3/4) ... [2021-10-28 08:40:24,732 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 08:40:24,741 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-28 08:40:24,741 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 08:40:24,742 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 08:40:24,742 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 08:40:24,778 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 08:40:24,778 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:40:24,779 INFO L168 Benchmark]: Toolchain (without parser) took 302324.41 ms. Allocated memory was 83.9 MB in the beginning and 4.6 GB in the end (delta: 4.6 GB). Free memory was 52.1 MB in the beginning and 1.8 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.8 GB. Max. memory is 16.1 GB. [2021-10-28 08:40:24,780 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 83.9 MB. Free memory was 53.2 MB in the beginning and 53.2 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:40:24,780 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.20 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 51.9 MB in the beginning and 77.2 MB in the end (delta: -25.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. [2021-10-28 08:40:24,781 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.14 ms. Allocated memory is still 100.7 MB. Free memory was 76.7 MB in the beginning and 75.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:40:24,781 INFO L168 Benchmark]: Boogie Preprocessor took 35.27 ms. Allocated memory is still 100.7 MB. Free memory was 75.6 MB in the beginning and 74.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:40:24,781 INFO L168 Benchmark]: RCFGBuilder took 364.62 ms. Allocated memory is still 100.7 MB. Free memory was 74.5 MB in the beginning and 64.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 08:40:24,782 INFO L168 Benchmark]: TraceAbstraction took 301486.59 ms. Allocated memory was 100.7 MB in the beginning and 4.6 GB in the end (delta: 4.5 GB). Free memory was 64.0 MB in the beginning and 1.8 GB in the end (delta: -1.8 GB). Peak memory consumption was 3.4 GB. Max. memory is 16.1 GB. [2021-10-28 08:40:24,782 INFO L168 Benchmark]: Witness Printer took 50.09 ms. Allocated memory is still 4.6 GB. Free memory was 1.8 GB in the beginning and 1.8 GB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 08:40:24,784 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 83.9 MB. Free memory was 53.2 MB in the beginning and 53.2 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 340.20 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 51.9 MB in the beginning and 77.2 MB in the end (delta: -25.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.14 ms. Allocated memory is still 100.7 MB. Free memory was 76.7 MB in the beginning and 75.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.27 ms. Allocated memory is still 100.7 MB. Free memory was 75.6 MB in the beginning and 74.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 364.62 ms. Allocated memory is still 100.7 MB. Free memory was 74.5 MB in the beginning and 64.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 301486.59 ms. Allocated memory was 100.7 MB in the beginning and 4.6 GB in the end (delta: 4.5 GB). Free memory was 64.0 MB in the beginning and 1.8 GB in the end (delta: -1.8 GB). Peak memory consumption was 3.4 GB. Max. memory is 16.1 GB. * Witness Printer took 50.09 ms. Allocated memory is still 4.6 GB. Free memory was 1.8 GB in the beginning and 1.8 GB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 301.3s, OverallIterations: 43, TraceHistogramMax: 84, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 39.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 197.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 600 SDtfs, 10075 SDslu, 1217 SDs, 0 SdLazy, 11151 SolverSat, 2479 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5567 GetRequests, 3280 SyntacticMatches, 0 SemanticMatches, 2287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108761 ImplicationChecksByTransitivity, 40.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1941occurred in iteration=36, InterpolantAutomatonStates: 1668, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.4s AutomataMinimizationTime, 43 MinimizatonAttempts, 10035 StatesRemovedByMinimization, 41 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 646 NumberOfFragments, 2105 HoareAnnotationTreeSize, 3 FomulaSimplifications, 63740626284713 FormulaSimplificationTreeSizeReduction, 63.2s HoareSimplificationTime, 3 FomulaSimplificationsInter, 12598421229953 FormulaSimplificationTreeSizeReductionInter, 134.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 31.8s InterpolantComputationTime, 7670 NumberOfCodeBlocks, 6667 NumberOfCodeBlocksAsserted, 181 NumberOfCheckSat, 7592 ConstructedInterpolants, 0 QuantifiedInterpolants, 29362 SizeOfPredicates, 120 NumberOfNonLiveVariables, 6478 ConjunctsInSsa, 582 ConjunctsInUnsatCore, 78 InterpolantComputations, 13 PerfectInterpolantSequences, 105695/148357 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((cond == 1 && b == 0) && 1 <= c) && d == 0) && 0 < last) && c <= 1) && st == 1) && b == a) && c + 199999 <= SIZE) || ((((((c <= 14 && (((((cond == 1 && d + 199998 <= SIZE) && last + 199978 <= SIZE) && 0 < last) && st == 1) || (((cond == 1 && d == 0) && 0 < last) && st == 1))) && last <= c + 9) && 1 == cond) && c < last + 1) && 200000 <= SIZE) && b == a)) || ((((((((cond == 1 && b == 0) && 21 <= c) && d == 0) && c < last + 1) && c <= 21) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((last <= c + 2 && (((((cond == 1 && d + 199998 <= SIZE) && last + 199978 <= SIZE) && 0 < last) && st == 1) || (((cond == 1 && d == 0) && 0 < last) && st == 1))) && 1 == cond) && c < last + 1) && c <= 21) && 200000 <= SIZE) && b == a)) || (((((((c < SIZE + 1 && cond == 1) && 1 == cond) && SIZE < last + 1) && d == 0) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((cond == 1 && d + 199998 <= SIZE) && 1 == cond) && last <= c + 16) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && c <= 7) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((cond == 1 && 5 <= c) && b == 0) && c <= 5) && d == 0) && c < last + 1) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((c < SIZE + 1 && cond == 1) && 1 == cond) && last + 1 <= c) && d == 0) && st == 0) && 0 < last) && 200000 <= SIZE) && b == a)) || ((((((((((c <= 4 && cond == 1) && d + 199998 <= SIZE) && last <= 19 + c) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && d == 0) && c < last + 1) && c + 199994 <= SIZE) && 6 <= c) && st == 1) && b == a)) || ((((((((((cond == 1 && c <= 15) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && last <= c + 8) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((cond == 1 && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && last <= c + 13) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a) && c <= 10)) || ((((((((((c <= 2 && cond == 1) && last <= c + 21) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((24 <= c && cond == 1) && b == 0) && d == 0) && c < last + 1) && c <= 24) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((((cond == 1 && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && 0 < last) && last <= 23) && st == 1) && 200000 <= SIZE) && b == a) && c == 0)) || ((((((((c < SIZE + 1 && cond == 1) && b == 0) && d == 0) && c < last + 1) && 25 <= c) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && c + 199991 <= SIZE) && d == 0) && c < last + 1) && st == 1) && b == a) && 9 <= c)) || ((((((((((cond == 1 && d + 199998 <= SIZE) && last <= c) && 1 == cond) && c <= 23) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && c + 199978 <= SIZE) && d == 0) && c < last + 1) && 22 <= c) && st == 1) && b == a)) || ((((((((cond == 1 && b == 0) && 10 <= c) && d == 0) && c < last + 1) && st == 1) && 200000 <= SIZE) && b == a) && c <= 10)) || ((((((((((c < SIZE + 1 && cond == 1) && d + 199998 <= SIZE) && 1 == cond) && last + 1 <= c) && last + 199978 <= SIZE) && st == 0) && 0 < last) && last <= 23) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && d == 0) && c < last + 1) && 16 <= c) && st == 1) && b == a) && 199984 + c <= SIZE)) || ((((((((3 <= c && cond == 1) && b == 0) && c <= 3) && d == 0) && c < last + 1) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && c + 199986 <= SIZE) && 14 <= c) && d == 0) && c < last + 1) && st == 1) && b == a)) || ((((((((((cond == 1 && d + 199998 <= SIZE) && 1 == cond) && c <= 19) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a) && last <= c + 4)) || (((((((cond == 1 && b == 0) && 23 <= c) && c + 199977 <= SIZE) && d == 0) && c < last + 1) && st == 1) && b == a)) || (((((((cond == 1 && b == 0) && d == 0) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a) && c == 0)) || ((((((((cond == 1 && b == 0) && 12 <= c) && d == 0) && c < last + 1) && c <= 12) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((7 <= c && cond == 1) && b == 0) && d == 0) && c < last + 1) && c <= 7) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && 18 <= c) && d == 0) && c < last + 1) && c + 199982 <= SIZE) && st == 1) && b == a)) || ((((((((((cond == 1 && c <= 8) && d + 199998 <= SIZE) && 1 == cond) && last <= c + 15) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && 11 <= c) && d == 0) && c < last + 1) && c + 199989 <= SIZE) && st == 1) && b == a)) || ((((((((cond == 1 && b == 0) && d == 0) && c < last + 1) && c <= 20) && st == 1) && 200000 <= SIZE) && 20 <= c) && b == a)) || ((((((((((cond == 1 && c <= 17) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a) && last <= c + 6)) || ((((((((((cond == 1 && d + 199998 <= SIZE) && 1 == cond) && c <= 13) && last + 199978 <= SIZE) && c < last + 1) && last <= c + 10) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((cond == 1 && b == 0) && 13 <= c) && c <= 13) && d == 0) && c < last + 1) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((cond == 1 && c < SIZE) && 1 == cond) && d == 0) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((((cond == 1 && d + 199998 <= SIZE) && last <= c + 22) && 1 == cond) && last + 199978 <= SIZE) && 0 < last) && c <= 1) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((c <= 18 && cond == 1) && d + 199998 <= SIZE) && 1 == cond) && last <= c + 5) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && d == 0) && c < last + 1) && st == 1) && b == a) && c + 199992 <= SIZE) && 8 <= c)) || ((((((((((cond == 1 && c <= 9) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && last <= c + 14) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((c <= 11 && cond == 1) && last <= c + 12) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((last <= c + 20 && cond == 1) && c <= 3) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((((3 <= c && cond == 1) && last <= 3) && c <= 3) && d + 199998 <= SIZE) && 1 == cond) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((last <= c + 18 && cond == 1) && d + 199998 <= SIZE) && c <= 5) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((cond == 1 && d + 199998 <= SIZE) && last <= c + 17) && 1 == cond) && c <= 6) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && c + 199983 <= SIZE) && 17 <= c) && d == 0) && c < last + 1) && st == 1) && b == a)) || (((((((cond == 1 && b == 0) && d == 0) && c < last + 1) && 2 <= c) && c + 199998 <= SIZE) && st == 1) && b == a)) || (((((((199996 + c <= SIZE && cond == 1) && b == 0) && d == 0) && c < last + 1) && st == 1) && b == a) && 4 <= c)) || (((((((cond == 1 && b == 0) && 15 <= c) && d == 0) && c < last + 1) && c + 199985 <= SIZE) && st == 1) && b == a)) || (((((((((((cond == 1 && d + 199998 <= SIZE) && last + 199978 <= SIZE) && 0 < last) && st == 1) || (((cond == 1 && d == 0) && 0 < last) && st == 1)) && last <= c + 11) && 1 == cond) && c < last + 1) && c <= 12) && 200000 <= SIZE) && b == a)) || ((((((((((cond == 1 && last <= c + 1) && c <= 22) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((cond == 1 && b == 0) && d == 0) && c <= 19) && c < last + 1) && 19 <= c) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((cond == 1 && last <= c + 3) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && c <= 20) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((last <= c + 7 && c <= 16) && (((((cond == 1 && d + 199998 <= SIZE) && last + 199978 <= SIZE) && 0 < last) && st == 1) || (((cond == 1 && d == 0) && 0 < last) && st == 1))) && 1 == cond) && c < last + 1) && 200000 <= SIZE) && b == a)) || ((((((((c < SIZE + 1 && cond == 1) && b == 0) && last + 1 <= c) && d == 0) && st == 0) && 0 < last) && 200000 <= SIZE) && b == a) - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: ((((((((((c < SIZE + 1 && cond == 1) && SIZE <= c) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && 0 < last) && last <= 23) && 200000 <= SIZE) && b == a) || ((((((cond == 1 && b == 0) && d == 0) && 0 < last) && 200000 <= SIZE) && b == a) && c == 0)) || (((((((c < SIZE + 1 && cond == 1) && SIZE <= c) && 1 == cond) && d == 0) && 0 < last) && 200000 <= SIZE) && b == a) RESULT: Ultimate proved your program to be correct! [2021-10-28 08:40:24,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3c00b6c-a078-4ec5-a987-e10d08cd2f28/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...