./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.1.prop1-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.1.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro --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 64bit --witnessprinter.graph.data.programhash ccd52863c81af6b9363b3cb9123948c48a201f89c1fc65f79eb7e0f4a69bd04e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:50:41,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:50:41,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:50:41,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:50:41,176 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:50:41,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:50:41,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:50:41,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:50:41,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:50:41,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:50:41,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:50:41,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:50:41,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:50:41,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:50:41,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:50:41,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:50:41,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:50:41,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:50:41,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:50:41,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:50:41,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:50:41,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:50:41,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:50:41,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:50:41,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:50:41,212 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:50:41,213 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:50:41,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:50:41,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:50:41,216 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:50:41,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:50:41,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:50:41,219 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:50:41,220 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:50:41,222 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:50:41,223 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:50:41,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:50:41,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:50:41,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:50:41,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:50:41,228 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:50:41,229 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-18 20:50:41,258 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:50:41,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:50:41,259 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:50:41,260 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:50:41,261 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:50:41,261 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:50:41,262 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:50:41,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:50:41,262 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:50:41,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:50:41,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:50:41,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:50:41,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:50:41,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:50:41,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:50:41,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:50:41,265 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:50:41,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:50:41,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:50:41,266 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:50:41,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:50:41,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:50:41,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:50:41,267 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:50:41,268 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:50:41,268 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:50:41,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:50:41,269 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:50:41,270 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:50:41,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:50:41,270 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_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ccd52863c81af6b9363b3cb9123948c48a201f89c1fc65f79eb7e0f4a69bd04e [2022-11-18 20:50:41,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:50:41,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:50:41,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:50:41,689 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:50:41,690 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:50:41,692 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.1.prop1-back-serstep.c [2022-11-18 20:50:41,774 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/data/42ae6fc85/af8123dae6a346fb9adac33b489f0a1b/FLAGda148338d [2022-11-18 20:50:42,576 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:50:42,585 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.1.prop1-back-serstep.c [2022-11-18 20:50:42,610 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/data/42ae6fc85/af8123dae6a346fb9adac33b489f0a1b/FLAGda148338d [2022-11-18 20:50:42,802 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/data/42ae6fc85/af8123dae6a346fb9adac33b489f0a1b [2022-11-18 20:50:42,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:50:42,807 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:50:42,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:50:42,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:50:42,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:50:42,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:50:42" (1/1) ... [2022-11-18 20:50:42,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fe10b50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:42, skipping insertion in model container [2022-11-18 20:50:42,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:50:42" (1/1) ... [2022-11-18 20:50:42,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:50:42,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:50:43,179 WARN L234 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_a7de7f28-dcde-4374-9270-f48f91a36592/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.1.prop1-back-serstep.c[1014,1027] [2022-11-18 20:50:43,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:50:43,572 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:50:43,586 WARN L234 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_a7de7f28-dcde-4374-9270-f48f91a36592/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.1.prop1-back-serstep.c[1014,1027] [2022-11-18 20:50:43,751 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:50:43,775 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:50:43,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:43 WrapperNode [2022-11-18 20:50:43,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:50:43,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:50:43,780 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:50:43,780 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:50:43,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:43" (1/1) ... [2022-11-18 20:50:43,852 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:43" (1/1) ... [2022-11-18 20:50:44,057 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1976 [2022-11-18 20:50:44,058 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:50:44,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:50:44,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:50:44,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:50:44,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:43" (1/1) ... [2022-11-18 20:50:44,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:43" (1/1) ... [2022-11-18 20:50:44,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:43" (1/1) ... [2022-11-18 20:50:44,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:43" (1/1) ... [2022-11-18 20:50:44,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:43" (1/1) ... [2022-11-18 20:50:44,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:43" (1/1) ... [2022-11-18 20:50:44,222 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:43" (1/1) ... [2022-11-18 20:50:44,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:43" (1/1) ... [2022-11-18 20:50:44,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:50:44,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:50:44,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:50:44,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:50:44,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:43" (1/1) ... [2022-11-18 20:50:44,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:50:44,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:44,303 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:50:44,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:50:44,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:50:44,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:50:44,807 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:50:44,823 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:50:47,519 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:50:47,542 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:50:47,543 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 20:50:47,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:50:47 BoogieIcfgContainer [2022-11-18 20:50:47,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:50:47,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:50:47,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:50:47,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:50:47,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:50:42" (1/3) ... [2022-11-18 20:50:47,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b53fb00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:50:47, skipping insertion in model container [2022-11-18 20:50:47,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:43" (2/3) ... [2022-11-18 20:50:47,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b53fb00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:50:47, skipping insertion in model container [2022-11-18 20:50:47,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:50:47" (3/3) ... [2022-11-18 20:50:47,567 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.protocols.1.prop1-back-serstep.c [2022-11-18 20:50:47,591 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:50:47,591 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:50:47,702 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:50:47,712 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@559caabe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:50:47,713 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:50:47,722 INFO L276 IsEmpty]: Start isEmpty. Operand has 344 states, 342 states have (on average 1.6608187134502923) internal successors, (568), 343 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:47,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-18 20:50:47,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:47,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:47,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:47,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:47,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1836813524, now seen corresponding path program 1 times [2022-11-18 20:50:47,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:47,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635825322] [2022-11-18 20:50:47,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:47,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:49,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:49,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:49,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635825322] [2022-11-18 20:50:49,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635825322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:49,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:50:49,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:50:49,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553965445] [2022-11-18 20:50:49,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:49,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:50:49,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:49,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:50:49,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:50:49,193 INFO L87 Difference]: Start difference. First operand has 344 states, 342 states have (on average 1.6608187134502923) internal successors, (568), 343 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:49,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:49,800 INFO L93 Difference]: Finished difference Result 1147 states and 1907 transitions. [2022-11-18 20:50:49,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:50:49,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-11-18 20:50:49,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:49,823 INFO L225 Difference]: With dead ends: 1147 [2022-11-18 20:50:49,823 INFO L226 Difference]: Without dead ends: 805 [2022-11-18 20:50:49,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:50:49,841 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 1662 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1662 SdHoareTripleChecker+Valid, 1758 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:49,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1662 Valid, 1758 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:50:49,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-11-18 20:50:49,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 342. [2022-11-18 20:50:49,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.653958944281525) internal successors, (564), 341 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:49,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 564 transitions. [2022-11-18 20:50:49,952 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 564 transitions. Word has length 91 [2022-11-18 20:50:49,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:49,954 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 564 transitions. [2022-11-18 20:50:49,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:49,956 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 564 transitions. [2022-11-18 20:50:49,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-18 20:50:49,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:49,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:49,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:50:49,970 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:49,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:49,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1104918932, now seen corresponding path program 1 times [2022-11-18 20:50:49,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:49,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150740821] [2022-11-18 20:50:49,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:49,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:50,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:50,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:50,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150740821] [2022-11-18 20:50:50,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150740821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:50,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:50:50,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:50:50,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079040176] [2022-11-18 20:50:50,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:50,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:50:50,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:50,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:50:50,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:50:50,851 INFO L87 Difference]: Start difference. First operand 342 states and 564 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:51,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:51,220 INFO L93 Difference]: Finished difference Result 1349 states and 2234 transitions. [2022-11-18 20:50:51,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:50:51,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-18 20:50:51,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:51,227 INFO L225 Difference]: With dead ends: 1349 [2022-11-18 20:50:51,228 INFO L226 Difference]: Without dead ends: 1009 [2022-11-18 20:50:51,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:50:51,231 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 1366 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1366 SdHoareTripleChecker+Valid, 1882 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:51,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1366 Valid, 1882 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:50:51,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-11-18 20:50:51,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 470. [2022-11-18 20:50:51,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.6545842217484008) internal successors, (776), 469 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:51,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 776 transitions. [2022-11-18 20:50:51,261 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 776 transitions. Word has length 92 [2022-11-18 20:50:51,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:51,262 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 776 transitions. [2022-11-18 20:50:51,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:51,263 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 776 transitions. [2022-11-18 20:50:51,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2022-11-18 20:50:51,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:51,270 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:51,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:50:51,271 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:51,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:51,272 INFO L85 PathProgramCache]: Analyzing trace with hash -779999335, now seen corresponding path program 1 times [2022-11-18 20:50:51,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:51,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918899243] [2022-11-18 20:50:51,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:51,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-18 20:51:14,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:14,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918899243] [2022-11-18 20:51:14,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918899243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:51:14,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:51:14,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:51:14,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840472263] [2022-11-18 20:51:14,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:51:14,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:51:14,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:14,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:51:14,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:51:14,644 INFO L87 Difference]: Start difference. First operand 470 states and 776 transitions. Second operand has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 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) [2022-11-18 20:51:14,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:51:14,985 INFO L93 Difference]: Finished difference Result 1478 states and 2445 transitions. [2022-11-18 20:51:14,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:51:14,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 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) Word has length 317 [2022-11-18 20:51:14,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:51:14,996 INFO L225 Difference]: With dead ends: 1478 [2022-11-18 20:51:14,997 INFO L226 Difference]: Without dead ends: 1138 [2022-11-18 20:51:14,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:51:15,007 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 1652 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1652 SdHoareTripleChecker+Valid, 2083 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:51:15,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1652 Valid, 2083 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:51:15,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-11-18 20:51:15,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 470. [2022-11-18 20:51:15,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.6545842217484008) internal successors, (776), 469 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:15,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 776 transitions. [2022-11-18 20:51:15,038 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 776 transitions. Word has length 317 [2022-11-18 20:51:15,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:51:15,040 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 776 transitions. [2022-11-18 20:51:15,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 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) [2022-11-18 20:51:15,042 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 776 transitions. [2022-11-18 20:51:15,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-11-18 20:51:15,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:51:15,055 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:15,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:51:15,056 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:51:15,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:15,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1140567493, now seen corresponding path program 1 times [2022-11-18 20:51:15,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:15,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194383492] [2022-11-18 20:51:15,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:15,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-18 20:51:32,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:32,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194383492] [2022-11-18 20:51:32,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194383492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:51:32,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:51:32,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:51:32,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808031518] [2022-11-18 20:51:32,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:51:32,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:51:32,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:32,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:51:32,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:51:32,880 INFO L87 Difference]: Start difference. First operand 470 states and 776 transitions. Second operand has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:33,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:51:33,449 INFO L93 Difference]: Finished difference Result 1492 states and 2465 transitions. [2022-11-18 20:51:33,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:51:33,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 318 [2022-11-18 20:51:33,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:51:33,457 INFO L225 Difference]: With dead ends: 1492 [2022-11-18 20:51:33,458 INFO L226 Difference]: Without dead ends: 1150 [2022-11-18 20:51:33,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:51:33,472 INFO L413 NwaCegarLoop]: 767 mSDtfsCounter, 2210 mSDsluCounter, 2080 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2210 SdHoareTripleChecker+Valid, 2847 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:51:33,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2210 Valid, 2847 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 20:51:33,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2022-11-18 20:51:33,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 470. [2022-11-18 20:51:33,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.6545842217484008) internal successors, (776), 469 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:33,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 776 transitions. [2022-11-18 20:51:33,494 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 776 transitions. Word has length 318 [2022-11-18 20:51:33,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:51:33,495 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 776 transitions. [2022-11-18 20:51:33,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:33,495 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 776 transitions. [2022-11-18 20:51:33,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-11-18 20:51:33,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:51:33,501 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:33,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:51:33,502 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:51:33,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:33,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1108559935, now seen corresponding path program 1 times [2022-11-18 20:51:33,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:33,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507127729] [2022-11-18 20:51:33,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:33,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:40,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:40,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507127729] [2022-11-18 20:51:40,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507127729] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:51:40,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092282587] [2022-11-18 20:51:40,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:40,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:40,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:51:41,006 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:51:41,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:51:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:42,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 2510 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-18 20:51:42,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:45,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-18 20:51:48,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092282587] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:51:48,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:51:48,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 10] total 20 [2022-11-18 20:51:48,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737111738] [2022-11-18 20:51:48,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:51:48,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:51:48,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:48,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:51:48,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:51:48,737 INFO L87 Difference]: Start difference. First operand 470 states and 776 transitions. Second operand has 7 states, 7 states have (on average 34.285714285714285) internal successors, (240), 7 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:54,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:51:54,524 INFO L93 Difference]: Finished difference Result 2422 states and 3969 transitions. [2022-11-18 20:51:54,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:51:54,525 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 34.285714285714285) internal successors, (240), 7 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 319 [2022-11-18 20:51:54,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:51:54,537 INFO L225 Difference]: With dead ends: 2422 [2022-11-18 20:51:54,538 INFO L226 Difference]: Without dead ends: 2077 [2022-11-18 20:51:54,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 634 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:51:54,540 INFO L413 NwaCegarLoop]: 881 mSDtfsCounter, 2973 mSDsluCounter, 1747 mSDsCounter, 0 mSdLazyCounter, 4791 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2973 SdHoareTripleChecker+Valid, 2628 SdHoareTripleChecker+Invalid, 4887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 4791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:51:54,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2973 Valid, 2628 Invalid, 4887 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [96 Valid, 4791 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-18 20:51:54,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2022-11-18 20:51:54,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 479. [2022-11-18 20:51:54,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 1.6527196652719665) internal successors, (790), 478 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:54,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 790 transitions. [2022-11-18 20:51:54,576 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 790 transitions. Word has length 319 [2022-11-18 20:51:54,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:51:54,577 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 790 transitions. [2022-11-18 20:51:54,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.285714285714285) internal successors, (240), 7 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:54,578 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 790 transitions. [2022-11-18 20:51:54,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-11-18 20:51:54,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:51:54,583 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:54,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:51:54,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:54,785 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:51:54,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:54,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1108500353, now seen corresponding path program 1 times [2022-11-18 20:51:54,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:54,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591693392] [2022-11-18 20:51:54,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:54,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:52:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:52:08,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:52:08,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591693392] [2022-11-18 20:52:08,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591693392] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:52:08,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292964851] [2022-11-18 20:52:08,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:52:08,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:52:08,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:52:08,056 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:52:08,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:52:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:09,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 2510 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-18 20:52:09,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:52:10,657 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:52:10,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:52:12,240 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-18 20:52:12,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292964851] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:52:12,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:52:12,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 9] total 15 [2022-11-18 20:52:12,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181444849] [2022-11-18 20:52:12,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:52:12,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:52:12,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:52:12,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:52:12,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:52:12,244 INFO L87 Difference]: Start difference. First operand 479 states and 790 transitions. Second operand has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:52:12,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:52:12,629 INFO L93 Difference]: Finished difference Result 1524 states and 2516 transitions. [2022-11-18 20:52:12,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:52:12,630 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 319 [2022-11-18 20:52:12,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:52:12,635 INFO L225 Difference]: With dead ends: 1524 [2022-11-18 20:52:12,635 INFO L226 Difference]: Without dead ends: 1170 [2022-11-18 20:52:12,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 636 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:52:12,637 INFO L413 NwaCegarLoop]: 765 mSDtfsCounter, 2777 mSDsluCounter, 2844 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2777 SdHoareTripleChecker+Valid, 3609 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:52:12,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2777 Valid, 3609 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:52:12,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2022-11-18 20:52:12,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 470. [2022-11-18 20:52:12,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.6545842217484008) internal successors, (776), 469 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:52:12,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 776 transitions. [2022-11-18 20:52:12,653 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 776 transitions. Word has length 319 [2022-11-18 20:52:12,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:52:12,654 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 776 transitions. [2022-11-18 20:52:12,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:52:12,655 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 776 transitions. [2022-11-18 20:52:12,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-11-18 20:52:12,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:52:12,661 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:52:12,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:52:12,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:52:12,874 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:52:12,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:52:12,875 INFO L85 PathProgramCache]: Analyzing trace with hash -204422251, now seen corresponding path program 1 times [2022-11-18 20:52:12,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:52:12,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067123631] [2022-11-18 20:52:12,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:52:12,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:52:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:52:21,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:52:21,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067123631] [2022-11-18 20:52:21,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067123631] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:52:21,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870709256] [2022-11-18 20:52:21,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:52:21,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:52:21,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:52:21,674 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:52:21,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:52:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:22,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 2513 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-18 20:52:22,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:52:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:52:25,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:52:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-18 20:52:28,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870709256] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:52:28,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:52:28,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 11] total 22 [2022-11-18 20:52:28,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638105719] [2022-11-18 20:52:28,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:52:28,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:52:28,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:52:28,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:52:28,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:52:28,283 INFO L87 Difference]: Start difference. First operand 470 states and 776 transitions. Second operand has 8 states, 8 states have (on average 30.375) internal successors, (243), 8 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:52:34,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:52:34,918 INFO L93 Difference]: Finished difference Result 2458 states and 4029 transitions. [2022-11-18 20:52:34,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:52:34,919 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 30.375) internal successors, (243), 8 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 320 [2022-11-18 20:52:34,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:52:34,927 INFO L225 Difference]: With dead ends: 2458 [2022-11-18 20:52:34,927 INFO L226 Difference]: Without dead ends: 2110 [2022-11-18 20:52:34,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 638 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 20:52:34,930 INFO L413 NwaCegarLoop]: 874 mSDtfsCounter, 4097 mSDsluCounter, 2320 mSDsCounter, 0 mSdLazyCounter, 5923 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4097 SdHoareTripleChecker+Valid, 3194 SdHoareTripleChecker+Invalid, 6019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 5923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:52:34,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4097 Valid, 3194 Invalid, 6019 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [96 Valid, 5923 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-18 20:52:34,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2022-11-18 20:52:34,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 482. [2022-11-18 20:52:34,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.6528066528066527) internal successors, (795), 481 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:52:34,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 795 transitions. [2022-11-18 20:52:34,957 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 795 transitions. Word has length 320 [2022-11-18 20:52:34,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:52:34,958 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 795 transitions. [2022-11-18 20:52:34,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 30.375) internal successors, (243), 8 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:52:34,959 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 795 transitions. [2022-11-18 20:52:34,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-11-18 20:52:34,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:52:34,962 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:52:34,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:52:35,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:52:35,177 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:52:35,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:52:35,178 INFO L85 PathProgramCache]: Analyzing trace with hash -204362669, now seen corresponding path program 1 times [2022-11-18 20:52:35,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:52:35,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482881525] [2022-11-18 20:52:35,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:52:35,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:52:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:52:45,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:52:45,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482881525] [2022-11-18 20:52:45,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482881525] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:52:45,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617932126] [2022-11-18 20:52:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:52:45,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:52:45,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:52:45,316 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:52:45,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:52:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:46,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 2513 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-18 20:52:46,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:52:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:52:47,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:52:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-18 20:52:49,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617932126] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:52:49,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:52:49,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 10] total 17 [2022-11-18 20:52:49,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883835013] [2022-11-18 20:52:49,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:52:49,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:52:49,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:52:49,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:52:49,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:52:49,485 INFO L87 Difference]: Start difference. First operand 482 states and 795 transitions. Second operand has 7 states, 7 states have (on average 34.714285714285715) internal successors, (243), 7 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:52:49,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:52:49,961 INFO L93 Difference]: Finished difference Result 1554 states and 2566 transitions. [2022-11-18 20:52:49,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:52:49,964 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 34.714285714285715) internal successors, (243), 7 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 320 [2022-11-18 20:52:49,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:52:49,970 INFO L225 Difference]: With dead ends: 1554 [2022-11-18 20:52:49,970 INFO L226 Difference]: Without dead ends: 1194 [2022-11-18 20:52:49,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:52:49,973 INFO L413 NwaCegarLoop]: 763 mSDtfsCounter, 3349 mSDsluCounter, 3606 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3349 SdHoareTripleChecker+Valid, 4369 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:52:49,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3349 Valid, 4369 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:52:49,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-11-18 20:52:49,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 470. [2022-11-18 20:52:49,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.6545842217484008) internal successors, (776), 469 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:52:49,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 776 transitions. [2022-11-18 20:52:49,992 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 776 transitions. Word has length 320 [2022-11-18 20:52:49,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:52:49,993 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 776 transitions. [2022-11-18 20:52:49,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.714285714285715) internal successors, (243), 7 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:52:49,994 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 776 transitions. [2022-11-18 20:52:49,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-11-18 20:52:49,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:52:49,997 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:52:50,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-18 20:52:50,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 20:52:50,213 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:52:50,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:52:50,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1792832359, now seen corresponding path program 1 times [2022-11-18 20:52:50,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:52:50,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617568846] [2022-11-18 20:52:50,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:52:50,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:52:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:52:55,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:52:55,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617568846] [2022-11-18 20:52:55,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617568846] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:52:55,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94779481] [2022-11-18 20:52:55,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:52:55,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:52:55,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:52:55,982 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:52:55,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:52:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:57,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 2516 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-18 20:52:57,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:52:59,049 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:52:59,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:53:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-18 20:53:01,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94779481] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:53:01,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:53:01,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 12] total 24 [2022-11-18 20:53:01,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507532722] [2022-11-18 20:53:01,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:53:01,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:53:01,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:53:01,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:53:01,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:53:01,860 INFO L87 Difference]: Start difference. First operand 470 states and 776 transitions. Second operand has 9 states, 9 states have (on average 27.333333333333332) internal successors, (246), 9 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:09,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:53:09,216 INFO L93 Difference]: Finished difference Result 2494 states and 4089 transitions. [2022-11-18 20:53:09,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:53:09,217 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 27.333333333333332) internal successors, (246), 9 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 321 [2022-11-18 20:53:09,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:53:09,225 INFO L225 Difference]: With dead ends: 2494 [2022-11-18 20:53:09,226 INFO L226 Difference]: Without dead ends: 2143 [2022-11-18 20:53:09,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 681 GetRequests, 642 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=231, Invalid=1409, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 20:53:09,228 INFO L413 NwaCegarLoop]: 867 mSDtfsCounter, 5226 mSDsluCounter, 2891 mSDsCounter, 0 mSdLazyCounter, 7057 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5226 SdHoareTripleChecker+Valid, 3758 SdHoareTripleChecker+Invalid, 7153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 7057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:53:09,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5226 Valid, 3758 Invalid, 7153 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [96 Valid, 7057 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-11-18 20:53:09,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2022-11-18 20:53:09,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 485. [2022-11-18 20:53:09,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.6528925619834711) internal successors, (800), 484 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:09,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 800 transitions. [2022-11-18 20:53:09,257 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 800 transitions. Word has length 321 [2022-11-18 20:53:09,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:53:09,258 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 800 transitions. [2022-11-18 20:53:09,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.333333333333332) internal successors, (246), 9 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 800 transitions. [2022-11-18 20:53:09,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-11-18 20:53:09,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:53:09,262 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:09,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:53:09,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:53:09,480 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:53:09,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:09,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1792891941, now seen corresponding path program 1 times [2022-11-18 20:53:09,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:53:09,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869379606] [2022-11-18 20:53:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:09,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:53:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 44 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:53:21,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:53:21,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869379606] [2022-11-18 20:53:21,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869379606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:53:21,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082688508] [2022-11-18 20:53:21,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:21,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:53:21,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:53:21,966 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:53:21,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:53:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:23,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 2516 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-18 20:53:23,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:53:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:53:24,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:53:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-18 20:53:26,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082688508] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:53:26,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:53:26,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 11] total 19 [2022-11-18 20:53:26,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259652865] [2022-11-18 20:53:26,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:53:26,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:53:26,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:53:26,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:53:26,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:53:26,324 INFO L87 Difference]: Start difference. First operand 485 states and 800 transitions. Second operand has 8 states, 8 states have (on average 30.75) internal successors, (246), 8 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:27,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:53:27,096 INFO L93 Difference]: Finished difference Result 1584 states and 2616 transitions. [2022-11-18 20:53:27,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:53:27,097 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 30.75) internal successors, (246), 8 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 321 [2022-11-18 20:53:27,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:53:27,102 INFO L225 Difference]: With dead ends: 1584 [2022-11-18 20:53:27,102 INFO L226 Difference]: Without dead ends: 1218 [2022-11-18 20:53:27,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 643 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:53:27,104 INFO L413 NwaCegarLoop]: 761 mSDtfsCounter, 3926 mSDsluCounter, 4366 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3926 SdHoareTripleChecker+Valid, 5127 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:53:27,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3926 Valid, 5127 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:53:27,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2022-11-18 20:53:27,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 470. [2022-11-18 20:53:27,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.6545842217484008) internal successors, (776), 469 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:27,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 776 transitions. [2022-11-18 20:53:27,124 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 776 transitions. Word has length 321 [2022-11-18 20:53:27,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:53:27,125 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 776 transitions. [2022-11-18 20:53:27,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 30.75) internal successors, (246), 8 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:27,126 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 776 transitions. [2022-11-18 20:53:27,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-11-18 20:53:27,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:53:27,129 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:27,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:53:27,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:53:27,346 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:53:27,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:27,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1626675599, now seen corresponding path program 1 times [2022-11-18 20:53:27,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:53:27,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603177486] [2022-11-18 20:53:27,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:27,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:53:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:35,853 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:53:35,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:53:35,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603177486] [2022-11-18 20:53:35,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603177486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:53:35,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965017203] [2022-11-18 20:53:35,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:35,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:53:35,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:53:35,856 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:53:35,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:53:37,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:37,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 2519 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-18 20:53:37,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:53:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:53:39,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:53:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-18 20:53:42,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965017203] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:53:42,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:53:42,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7, 13] total 26 [2022-11-18 20:53:42,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548987575] [2022-11-18 20:53:42,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:53:42,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:53:42,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:53:42,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:53:42,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:53:42,301 INFO L87 Difference]: Start difference. First operand 470 states and 776 transitions. Second operand has 10 states, 10 states have (on average 24.9) internal successors, (249), 10 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:50,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:53:50,194 INFO L93 Difference]: Finished difference Result 2530 states and 4149 transitions. [2022-11-18 20:53:50,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-18 20:53:50,195 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 24.9) internal successors, (249), 10 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 322 [2022-11-18 20:53:50,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:53:50,204 INFO L225 Difference]: With dead ends: 2530 [2022-11-18 20:53:50,205 INFO L226 Difference]: Without dead ends: 2176 [2022-11-18 20:53:50,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 646 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=301, Invalid=1861, Unknown=0, NotChecked=0, Total=2162 [2022-11-18 20:53:50,207 INFO L413 NwaCegarLoop]: 860 mSDtfsCounter, 6360 mSDsluCounter, 3460 mSDsCounter, 0 mSdLazyCounter, 8193 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6360 SdHoareTripleChecker+Valid, 4320 SdHoareTripleChecker+Invalid, 8289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 8193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:53:50,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6360 Valid, 4320 Invalid, 8289 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [96 Valid, 8193 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-11-18 20:53:50,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2022-11-18 20:53:50,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 488. [2022-11-18 20:53:50,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 1.6529774127310062) internal successors, (805), 487 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:50,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 805 transitions. [2022-11-18 20:53:50,231 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 805 transitions. Word has length 322 [2022-11-18 20:53:50,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:53:50,232 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 805 transitions. [2022-11-18 20:53:50,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.9) internal successors, (249), 10 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:50,232 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 805 transitions. [2022-11-18 20:53:50,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-11-18 20:53:50,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:53:50,235 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:50,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:53:50,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 20:53:50,450 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:53:50,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:50,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1626616017, now seen corresponding path program 1 times [2022-11-18 20:53:50,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:53:50,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115637129] [2022-11-18 20:53:50,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:50,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:53:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:55,591 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:53:55,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:53:55,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115637129] [2022-11-18 20:53:55,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115637129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:53:55,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012819289] [2022-11-18 20:53:55,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:55,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:53:55,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:53:55,600 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:53:55,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:53:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:56,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 2519 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-18 20:53:56,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:53:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:53:57,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:53:59,131 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-18 20:53:59,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012819289] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:53:59,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:53:59,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 12] total 22 [2022-11-18 20:53:59,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006047033] [2022-11-18 20:53:59,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:53:59,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:53:59,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:53:59,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:53:59,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:53:59,134 INFO L87 Difference]: Start difference. First operand 488 states and 805 transitions. Second operand has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:59,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:53:59,804 INFO L93 Difference]: Finished difference Result 1614 states and 2666 transitions. [2022-11-18 20:53:59,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:53:59,805 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 322 [2022-11-18 20:53:59,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:53:59,809 INFO L225 Difference]: With dead ends: 1614 [2022-11-18 20:53:59,809 INFO L226 Difference]: Without dead ends: 1242 [2022-11-18 20:53:59,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 644 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 20:53:59,811 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 4508 mSDsluCounter, 5124 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4508 SdHoareTripleChecker+Valid, 5883 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:53:59,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4508 Valid, 5883 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:53:59,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2022-11-18 20:53:59,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 470. [2022-11-18 20:53:59,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.6545842217484008) internal successors, (776), 469 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:59,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 776 transitions. [2022-11-18 20:53:59,827 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 776 transitions. Word has length 322 [2022-11-18 20:53:59,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:53:59,828 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 776 transitions. [2022-11-18 20:53:59,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:59,828 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 776 transitions. [2022-11-18 20:53:59,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-11-18 20:53:59,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:53:59,831 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:59,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-18 20:54:00,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:54:00,046 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:54:00,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:54:00,046 INFO L85 PathProgramCache]: Analyzing trace with hash -695372657, now seen corresponding path program 1 times [2022-11-18 20:54:00,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:54:00,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260700400] [2022-11-18 20:54:00,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:00,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:54:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:54:05,958 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:54:05,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:54:05,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260700400] [2022-11-18 20:54:05,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260700400] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:54:05,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846988233] [2022-11-18 20:54:05,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:05,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:54:05,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:54:05,961 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:54:05,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:54:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:54:06,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 2522 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-18 20:54:07,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:54:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:54:08,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:54:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-18 20:54:11,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846988233] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:54:11,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:54:11,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7, 14] total 28 [2022-11-18 20:54:11,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299763415] [2022-11-18 20:54:11,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:54:11,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:54:11,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:54:11,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:54:11,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2022-11-18 20:54:11,493 INFO L87 Difference]: Start difference. First operand 470 states and 776 transitions. Second operand has 11 states, 11 states have (on average 22.90909090909091) internal successors, (252), 11 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:19,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:54:19,360 INFO L93 Difference]: Finished difference Result 2566 states and 4209 transitions. [2022-11-18 20:54:19,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 20:54:19,361 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 22.90909090909091) internal successors, (252), 11 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 323 [2022-11-18 20:54:19,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:54:19,366 INFO L225 Difference]: With dead ends: 2566 [2022-11-18 20:54:19,366 INFO L226 Difference]: Without dead ends: 2209 [2022-11-18 20:54:19,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 650 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=381, Invalid=2375, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 20:54:19,368 INFO L413 NwaCegarLoop]: 853 mSDtfsCounter, 7786 mSDsluCounter, 3951 mSDsCounter, 0 mSdLazyCounter, 8964 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7786 SdHoareTripleChecker+Valid, 4804 SdHoareTripleChecker+Invalid, 9060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 8964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:54:19,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7786 Valid, 4804 Invalid, 9060 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [96 Valid, 8964 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-18 20:54:19,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2022-11-18 20:54:19,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 491. [2022-11-18 20:54:19,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 1.653061224489796) internal successors, (810), 490 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:19,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 810 transitions. [2022-11-18 20:54:19,390 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 810 transitions. Word has length 323 [2022-11-18 20:54:19,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:54:19,391 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 810 transitions. [2022-11-18 20:54:19,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 22.90909090909091) internal successors, (252), 11 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:19,392 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 810 transitions. [2022-11-18 20:54:19,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-11-18 20:54:19,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:54:19,394 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:54:19,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:54:19,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 20:54:19,610 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:54:19,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:54:19,611 INFO L85 PathProgramCache]: Analyzing trace with hash -695313075, now seen corresponding path program 1 times [2022-11-18 20:54:19,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:54:19,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440782597] [2022-11-18 20:54:19,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:19,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:54:21,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:54:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:54:24,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:54:24,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440782597] [2022-11-18 20:54:24,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440782597] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:54:24,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779588330] [2022-11-18 20:54:24,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:24,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:54:24,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:54:24,347 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:54:24,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:54:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:54:25,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 2522 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-18 20:54:25,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:54:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:54:26,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:54:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-18 20:54:27,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779588330] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:54:27,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:54:27,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7, 13] total 24 [2022-11-18 20:54:27,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290369125] [2022-11-18 20:54:27,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:54:27,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:54:27,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:54:27,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:54:27,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:54:27,888 INFO L87 Difference]: Start difference. First operand 491 states and 810 transitions. Second operand has 10 states, 10 states have (on average 25.2) internal successors, (252), 10 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:28,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:54:28,656 INFO L93 Difference]: Finished difference Result 1644 states and 2716 transitions. [2022-11-18 20:54:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 20:54:28,658 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 25.2) internal successors, (252), 10 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 323 [2022-11-18 20:54:28,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:54:28,663 INFO L225 Difference]: With dead ends: 1644 [2022-11-18 20:54:28,663 INFO L226 Difference]: Without dead ends: 1266 [2022-11-18 20:54:28,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 647 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=261, Invalid=1545, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 20:54:28,665 INFO L413 NwaCegarLoop]: 757 mSDtfsCounter, 5095 mSDsluCounter, 5880 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5095 SdHoareTripleChecker+Valid, 6637 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:54:28,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5095 Valid, 6637 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:54:28,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2022-11-18 20:54:28,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 470. [2022-11-18 20:54:28,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.6545842217484008) internal successors, (776), 469 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 776 transitions. [2022-11-18 20:54:28,679 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 776 transitions. Word has length 323 [2022-11-18 20:54:28,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:54:28,680 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 776 transitions. [2022-11-18 20:54:28,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 25.2) internal successors, (252), 10 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:28,680 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 776 transitions. [2022-11-18 20:54:28,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-11-18 20:54:28,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:54:28,683 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:54:28,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:54:28,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:54:28,897 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:54:28,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:54:28,898 INFO L85 PathProgramCache]: Analyzing trace with hash 592335819, now seen corresponding path program 1 times [2022-11-18 20:54:28,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:54:28,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329556382] [2022-11-18 20:54:28,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:28,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:54:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:54:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:54:34,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:54:34,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329556382] [2022-11-18 20:54:34,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329556382] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:54:34,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845249365] [2022-11-18 20:54:34,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:34,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:54:34,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:54:34,825 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:54:34,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:54:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:54:35,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 2525 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-18 20:54:35,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:54:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:54:37,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:54:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-18 20:54:40,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845249365] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:54:40,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:54:40,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7, 15] total 30 [2022-11-18 20:54:40,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72941245] [2022-11-18 20:54:40,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:54:40,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:54:40,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:54:40,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:54:40,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:54:40,611 INFO L87 Difference]: Start difference. First operand 470 states and 776 transitions. Second operand has 12 states, 12 states have (on average 21.25) internal successors, (255), 12 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:49,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:54:49,654 INFO L93 Difference]: Finished difference Result 2602 states and 4269 transitions. [2022-11-18 20:54:49,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-18 20:54:49,655 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 21.25) internal successors, (255), 12 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 324 [2022-11-18 20:54:49,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:54:49,662 INFO L225 Difference]: With dead ends: 2602 [2022-11-18 20:54:49,662 INFO L226 Difference]: Without dead ends: 2242 [2022-11-18 20:54:49,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 654 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=471, Invalid=2951, Unknown=0, NotChecked=0, Total=3422 [2022-11-18 20:54:49,665 INFO L413 NwaCegarLoop]: 846 mSDtfsCounter, 8930 mSDsluCounter, 4515 mSDsCounter, 0 mSdLazyCounter, 10097 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8930 SdHoareTripleChecker+Valid, 5361 SdHoareTripleChecker+Invalid, 10193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 10097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:54:49,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8930 Valid, 5361 Invalid, 10193 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [96 Valid, 10097 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-11-18 20:54:49,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2022-11-18 20:54:49,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 494. [2022-11-18 20:54:49,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 1.6531440162271804) internal successors, (815), 493 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:49,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 815 transitions. [2022-11-18 20:54:49,684 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 815 transitions. Word has length 324 [2022-11-18 20:54:49,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:54:49,685 INFO L495 AbstractCegarLoop]: Abstraction has 494 states and 815 transitions. [2022-11-18 20:54:49,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.25) internal successors, (255), 12 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:49,685 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 815 transitions. [2022-11-18 20:54:49,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-11-18 20:54:49,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:54:49,688 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:54:49,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:54:49,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:54:49,904 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:54:49,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:54:49,904 INFO L85 PathProgramCache]: Analyzing trace with hash 592395401, now seen corresponding path program 1 times [2022-11-18 20:54:49,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:54:49,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047861881] [2022-11-18 20:54:49,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:49,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:54:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:54:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:54:55,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:54:55,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047861881] [2022-11-18 20:54:55,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047861881] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:54:55,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872477350] [2022-11-18 20:54:55,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:55,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:54:55,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:54:55,435 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:54:55,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:54:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:54:56,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 2525 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-18 20:54:56,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:54:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:54:57,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:54:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-18 20:54:59,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872477350] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:54:59,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:54:59,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7, 14] total 26 [2022-11-18 20:54:59,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734787070] [2022-11-18 20:54:59,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:54:59,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:54:59,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:54:59,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:54:59,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:54:59,430 INFO L87 Difference]: Start difference. First operand 494 states and 815 transitions. Second operand has 11 states, 11 states have (on average 23.181818181818183) internal successors, (255), 11 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:00,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:00,417 INFO L93 Difference]: Finished difference Result 1674 states and 2766 transitions. [2022-11-18 20:55:00,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 20:55:00,418 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 23.181818181818183) internal successors, (255), 11 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 324 [2022-11-18 20:55:00,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:00,422 INFO L225 Difference]: With dead ends: 1674 [2022-11-18 20:55:00,422 INFO L226 Difference]: Without dead ends: 1290 [2022-11-18 20:55:00,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 650 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=324, Invalid=1932, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 20:55:00,424 INFO L413 NwaCegarLoop]: 755 mSDtfsCounter, 5687 mSDsluCounter, 6634 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5687 SdHoareTripleChecker+Valid, 7389 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:00,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5687 Valid, 7389 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:55:00,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2022-11-18 20:55:00,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 470. [2022-11-18 20:55:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.6545842217484008) internal successors, (776), 469 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:00,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 776 transitions. [2022-11-18 20:55:00,439 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 776 transitions. Word has length 324 [2022-11-18 20:55:00,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:00,439 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 776 transitions. [2022-11-18 20:55:00,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.181818181818183) internal successors, (255), 11 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:00,440 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 776 transitions. [2022-11-18 20:55:00,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2022-11-18 20:55:00,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:00,443 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:00,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:55:00,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:55:00,658 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:55:00,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:00,659 INFO L85 PathProgramCache]: Analyzing trace with hash -701426635, now seen corresponding path program 1 times [2022-11-18 20:55:00,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:00,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206082856] [2022-11-18 20:55:00,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:00,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:10,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:10,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206082856] [2022-11-18 20:55:10,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206082856] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:55:10,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390268727] [2022-11-18 20:55:10,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:10,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:55:10,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:55:10,158 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:55:10,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:55:11,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:11,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 2528 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-18 20:55:11,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:55:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:13,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:55:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-18 20:55:16,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390268727] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:55:16,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:55:16,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [7, 16] total 32 [2022-11-18 20:55:16,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272666865] [2022-11-18 20:55:16,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:16,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:55:16,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:16,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:55:16,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:55:16,363 INFO L87 Difference]: Start difference. First operand 470 states and 776 transitions. Second operand has 13 states, 13 states have (on average 19.846153846153847) internal successors, (258), 13 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:26,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:26,119 INFO L93 Difference]: Finished difference Result 2638 states and 4329 transitions. [2022-11-18 20:55:26,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-18 20:55:26,120 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 19.846153846153847) internal successors, (258), 13 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 325 [2022-11-18 20:55:26,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:26,125 INFO L225 Difference]: With dead ends: 2638 [2022-11-18 20:55:26,125 INFO L226 Difference]: Without dead ends: 2275 [2022-11-18 20:55:26,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 721 GetRequests, 658 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=569, Invalid=3591, Unknown=0, NotChecked=0, Total=4160 [2022-11-18 20:55:26,129 INFO L413 NwaCegarLoop]: 839 mSDtfsCounter, 10079 mSDsluCounter, 5077 mSDsCounter, 0 mSdLazyCounter, 11232 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10079 SdHoareTripleChecker+Valid, 5916 SdHoareTripleChecker+Invalid, 11328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 11232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:26,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10079 Valid, 5916 Invalid, 11328 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [96 Valid, 11232 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-11-18 20:55:26,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2275 states. [2022-11-18 20:55:26,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2275 to 497. [2022-11-18 20:55:26,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 1.653225806451613) internal successors, (820), 496 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:26,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 820 transitions. [2022-11-18 20:55:26,148 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 820 transitions. Word has length 325 [2022-11-18 20:55:26,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:26,148 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 820 transitions. [2022-11-18 20:55:26,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.846153846153847) internal successors, (258), 13 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:26,149 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 820 transitions. [2022-11-18 20:55:26,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2022-11-18 20:55:26,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:26,152 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:26,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-18 20:55:26,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:55:26,359 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:55:26,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:26,360 INFO L85 PathProgramCache]: Analyzing trace with hash -701367053, now seen corresponding path program 1 times [2022-11-18 20:55:26,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:26,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926279493] [2022-11-18 20:55:26,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:26,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:31,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:31,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926279493] [2022-11-18 20:55:31,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926279493] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:55:31,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961499561] [2022-11-18 20:55:31,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:31,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:55:31,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:55:31,752 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:55:31,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:55:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:32,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 2528 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-18 20:55:32,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:55:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:34,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:55:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-18 20:55:35,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961499561] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:55:35,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:55:35,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7, 15] total 28 [2022-11-18 20:55:35,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865810712] [2022-11-18 20:55:35,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:35,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:55:35,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:35,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:55:35,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-18 20:55:35,678 INFO L87 Difference]: Start difference. First operand 497 states and 820 transitions. Second operand has 12 states, 12 states have (on average 21.5) internal successors, (258), 12 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:36,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:36,855 INFO L93 Difference]: Finished difference Result 1704 states and 2816 transitions. [2022-11-18 20:55:36,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 20:55:36,855 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 21.5) internal successors, (258), 12 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 325 [2022-11-18 20:55:36,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:36,858 INFO L225 Difference]: With dead ends: 1704 [2022-11-18 20:55:36,858 INFO L226 Difference]: Without dead ends: 1314 [2022-11-18 20:55:36,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 653 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=394, Invalid=2362, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 20:55:36,860 INFO L413 NwaCegarLoop]: 753 mSDtfsCounter, 6284 mSDsluCounter, 7386 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6284 SdHoareTripleChecker+Valid, 8139 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:36,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6284 Valid, 8139 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:55:36,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2022-11-18 20:55:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 470. [2022-11-18 20:55:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.6545842217484008) internal successors, (776), 469 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:36,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 776 transitions. [2022-11-18 20:55:36,870 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 776 transitions. Word has length 325 [2022-11-18 20:55:36,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:36,871 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 776 transitions. [2022-11-18 20:55:36,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.5) internal successors, (258), 12 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:36,872 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 776 transitions. [2022-11-18 20:55:36,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-11-18 20:55:36,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:36,874 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:36,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:55:37,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:55:37,089 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:55:37,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:37,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1807319129, now seen corresponding path program 1 times [2022-11-18 20:55:37,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:37,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536657338] [2022-11-18 20:55:37,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:37,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:39,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:41,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:41,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536657338] [2022-11-18 20:55:41,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536657338] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:55:41,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234242426] [2022-11-18 20:55:41,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:41,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:55:41,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:55:41,979 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:55:41,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:55:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:43,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 2531 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-18 20:55:43,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:55:45,047 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:45,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:55:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-18 20:55:47,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234242426] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:55:47,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:55:47,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7, 17] total 34 [2022-11-18 20:55:47,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756931570] [2022-11-18 20:55:47,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:47,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:55:47,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:47,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:55:47,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 20:55:47,949 INFO L87 Difference]: Start difference. First operand 470 states and 776 transitions. Second operand has 14 states, 14 states have (on average 18.642857142857142) internal successors, (261), 14 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:58,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:58,495 INFO L93 Difference]: Finished difference Result 2674 states and 4389 transitions. [2022-11-18 20:55:58,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-18 20:55:58,496 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 18.642857142857142) internal successors, (261), 14 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 326 [2022-11-18 20:55:58,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:58,500 INFO L225 Difference]: With dead ends: 2674 [2022-11-18 20:55:58,500 INFO L226 Difference]: Without dead ends: 2308 [2022-11-18 20:55:58,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 662 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=681, Invalid=4289, Unknown=0, NotChecked=0, Total=4970 [2022-11-18 20:55:58,503 INFO L413 NwaCegarLoop]: 832 mSDtfsCounter, 10946 mSDsluCounter, 5716 mSDsCounter, 0 mSdLazyCounter, 12757 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10946 SdHoareTripleChecker+Valid, 6548 SdHoareTripleChecker+Invalid, 12853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 12757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:58,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10946 Valid, 6548 Invalid, 12853 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [96 Valid, 12757 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2022-11-18 20:55:58,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2022-11-18 20:55:58,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 500. [2022-11-18 20:55:58,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.653306613226453) internal successors, (825), 499 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:58,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 825 transitions. [2022-11-18 20:55:58,521 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 825 transitions. Word has length 326 [2022-11-18 20:55:58,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:58,521 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 825 transitions. [2022-11-18 20:55:58,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.642857142857142) internal successors, (261), 14 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:58,522 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 825 transitions. [2022-11-18 20:55:58,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-11-18 20:55:58,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:58,525 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:58,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:55:58,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:55:58,740 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:55:58,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:58,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1807259547, now seen corresponding path program 1 times [2022-11-18 20:55:58,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:58,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452304068] [2022-11-18 20:55:58,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:58,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:04,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:04,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452304068] [2022-11-18 20:56:04,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452304068] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:04,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636948962] [2022-11-18 20:56:04,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:04,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:04,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:56:04,218 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:56:04,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:56:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:05,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 2531 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-18 20:56:05,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:06,749 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:06,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:56:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-18 20:56:08,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636948962] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:08,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:56:08,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [7, 16] total 30 [2022-11-18 20:56:08,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564264438] [2022-11-18 20:56:08,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:56:08,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:56:08,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:08,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:56:08,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:56:08,864 INFO L87 Difference]: Start difference. First operand 500 states and 825 transitions. Second operand has 13 states, 13 states have (on average 20.076923076923077) internal successors, (261), 13 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:10,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:10,319 INFO L93 Difference]: Finished difference Result 1734 states and 2866 transitions. [2022-11-18 20:56:10,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 20:56:10,319 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 20.076923076923077) internal successors, (261), 13 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 326 [2022-11-18 20:56:10,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:10,322 INFO L225 Difference]: With dead ends: 1734 [2022-11-18 20:56:10,322 INFO L226 Difference]: Without dead ends: 1338 [2022-11-18 20:56:10,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 656 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=471, Invalid=2835, Unknown=0, NotChecked=0, Total=3306 [2022-11-18 20:56:10,324 INFO L413 NwaCegarLoop]: 751 mSDtfsCounter, 6886 mSDsluCounter, 8136 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6886 SdHoareTripleChecker+Valid, 8887 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:10,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6886 Valid, 8887 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:56:10,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2022-11-18 20:56:10,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 470. [2022-11-18 20:56:10,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.6545842217484008) internal successors, (776), 469 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:10,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 776 transitions. [2022-11-18 20:56:10,337 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 776 transitions. Word has length 326 [2022-11-18 20:56:10,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:10,338 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 776 transitions. [2022-11-18 20:56:10,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 20.076923076923077) internal successors, (261), 13 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:10,338 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 776 transitions. [2022-11-18 20:56:10,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-11-18 20:56:10,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:10,341 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:10,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:56:10,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:10,564 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:56:10,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:10,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1133020765, now seen corresponding path program 1 times [2022-11-18 20:56:10,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:10,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967544025] [2022-11-18 20:56:10,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:10,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:20,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:20,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967544025] [2022-11-18 20:56:20,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967544025] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:20,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095826503] [2022-11-18 20:56:20,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:20,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:20,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:56:20,428 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:56:20,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 20:56:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:21,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 2534 conjuncts, 115 conjunts are in the unsatisfiable core [2022-11-18 20:56:21,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:23,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:56:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-18 20:56:26,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095826503] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:26,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:56:26,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [7, 18] total 36 [2022-11-18 20:56:26,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898230181] [2022-11-18 20:56:26,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:56:26,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:56:26,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:26,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:56:26,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 20:56:26,572 INFO L87 Difference]: Start difference. First operand 470 states and 776 transitions. Second operand has 15 states, 15 states have (on average 17.6) internal successors, (264), 15 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:38,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:38,230 INFO L93 Difference]: Finished difference Result 2710 states and 4449 transitions. [2022-11-18 20:56:38,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-18 20:56:38,231 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 17.6) internal successors, (264), 15 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2022-11-18 20:56:38,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:38,234 INFO L225 Difference]: With dead ends: 2710 [2022-11-18 20:56:38,235 INFO L226 Difference]: Without dead ends: 2341 [2022-11-18 20:56:38,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 666 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=799, Invalid=5053, Unknown=0, NotChecked=0, Total=5852 [2022-11-18 20:56:38,238 INFO L413 NwaCegarLoop]: 825 mSDtfsCounter, 12392 mSDsluCounter, 6195 mSDsCounter, 0 mSdLazyCounter, 13508 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12392 SdHoareTripleChecker+Valid, 7020 SdHoareTripleChecker+Invalid, 13604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 13508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:38,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12392 Valid, 7020 Invalid, 13604 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [96 Valid, 13508 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-11-18 20:56:38,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2022-11-18 20:56:38,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 503. [2022-11-18 20:56:38,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 1.653386454183267) internal successors, (830), 502 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:38,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 830 transitions. [2022-11-18 20:56:38,258 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 830 transitions. Word has length 327 [2022-11-18 20:56:38,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:38,259 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 830 transitions. [2022-11-18 20:56:38,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 17.6) internal successors, (264), 15 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:38,260 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 830 transitions. [2022-11-18 20:56:38,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-11-18 20:56:38,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:38,262 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:38,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-18 20:56:38,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:38,477 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:56:38,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:38,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1133080347, now seen corresponding path program 1 times [2022-11-18 20:56:38,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:38,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321137761] [2022-11-18 20:56:38,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:38,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:49,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:49,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321137761] [2022-11-18 20:56:49,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321137761] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:49,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349371920] [2022-11-18 20:56:49,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:49,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:49,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:56:49,235 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:56:49,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 20:56:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:50,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 2534 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-18 20:56:50,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:51,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:56:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-18 20:56:54,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349371920] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:54,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:56:54,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7, 17] total 31 [2022-11-18 20:56:54,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169315227] [2022-11-18 20:56:54,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:56:54,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:56:54,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:54,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:56:54,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2022-11-18 20:56:54,614 INFO L87 Difference]: Start difference. First operand 503 states and 830 transitions. Second operand has 14 states, 14 states have (on average 18.857142857142858) internal successors, (264), 14 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:56,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:56,481 INFO L93 Difference]: Finished difference Result 1764 states and 2916 transitions. [2022-11-18 20:56:56,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-18 20:56:56,485 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 18.857142857142858) internal successors, (264), 14 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2022-11-18 20:56:56,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:56,488 INFO L225 Difference]: With dead ends: 1764 [2022-11-18 20:56:56,488 INFO L226 Difference]: Without dead ends: 1362 [2022-11-18 20:56:56,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 660 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=550, Invalid=3232, Unknown=0, NotChecked=0, Total=3782 [2022-11-18 20:56:56,490 INFO L413 NwaCegarLoop]: 749 mSDtfsCounter, 7493 mSDsluCounter, 8884 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7493 SdHoareTripleChecker+Valid, 9633 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:56,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7493 Valid, 9633 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:56:56,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2022-11-18 20:56:56,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 470. [2022-11-18 20:56:56,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.6545842217484008) internal successors, (776), 469 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:56,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 776 transitions. [2022-11-18 20:56:56,503 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 776 transitions. Word has length 327 [2022-11-18 20:56:56,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:56,503 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 776 transitions. [2022-11-18 20:56:56,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.857142857142858) internal successors, (264), 14 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:56,504 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 776 transitions. [2022-11-18 20:56:56,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-11-18 20:56:56,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:56,507 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:56,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 20:56:56,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:56,715 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:56:56,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:56,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1458214655, now seen corresponding path program 1 times [2022-11-18 20:56:56,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:56,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534617557] [2022-11-18 20:56:56,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:56,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:02,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:02,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534617557] [2022-11-18 20:57:02,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534617557] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:57:02,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572759260] [2022-11-18 20:57:02,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:02,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:02,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:57:02,447 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:57:02,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 20:57:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:03,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 2537 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-18 20:57:03,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:05,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:57:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:09,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572759260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:57:09,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:57:09,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 9] total 22 [2022-11-18 20:57:09,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174208173] [2022-11-18 20:57:09,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:57:09,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 20:57:09,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:09,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 20:57:09,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:57:09,834 INFO L87 Difference]: Start difference. First operand 470 states and 776 transitions. Second operand has 22 states, 22 states have (on average 44.36363636363637) internal successors, (976), 22 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:41,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:41,838 INFO L93 Difference]: Finished difference Result 25750 states and 42642 transitions. [2022-11-18 20:57:41,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-11-18 20:57:41,840 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 44.36363636363637) internal successors, (976), 22 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 328 [2022-11-18 20:57:41,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:41,889 INFO L225 Difference]: With dead ends: 25750 [2022-11-18 20:57:41,889 INFO L226 Difference]: Without dead ends: 25378 [2022-11-18 20:57:41,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 879 GetRequests, 697 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13857 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=5298, Invalid=28374, Unknown=0, NotChecked=0, Total=33672 [2022-11-18 20:57:41,900 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 162625 mSDsluCounter, 4735 mSDsCounter, 0 mSdLazyCounter, 12643 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162625 SdHoareTripleChecker+Valid, 4998 SdHoareTripleChecker+Invalid, 12838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 12643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:41,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162625 Valid, 4998 Invalid, 12838 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [195 Valid, 12643 Invalid, 0 Unknown, 0 Unchecked, 17.8s Time] [2022-11-18 20:57:41,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25378 states. [2022-11-18 20:57:42,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25378 to 1237. [2022-11-18 20:57:42,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1236 states have (on average 1.651294498381877) internal successors, (2041), 1236 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:42,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 2041 transitions. [2022-11-18 20:57:42,067 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 2041 transitions. Word has length 328 [2022-11-18 20:57:42,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:42,067 INFO L495 AbstractCegarLoop]: Abstraction has 1237 states and 2041 transitions. [2022-11-18 20:57:42,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 44.36363636363637) internal successors, (976), 22 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:42,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 2041 transitions. [2022-11-18 20:57:42,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-11-18 20:57:42,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:42,073 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:57:42,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 20:57:42,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:42,287 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:57:42,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:42,288 INFO L85 PathProgramCache]: Analyzing trace with hash -212642317, now seen corresponding path program 1 times [2022-11-18 20:57:42,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:42,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207244120] [2022-11-18 20:57:42,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:42,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 44 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:54,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:54,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207244120] [2022-11-18 20:57:54,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207244120] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:57:54,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545063741] [2022-11-18 20:57:54,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:54,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:54,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:57:54,375 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:57:54,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 20:57:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:55,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 2543 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-18 20:57:55,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:58,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:03,386 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 44 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:03,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545063741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:58:03,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:58:03,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 25 [2022-11-18 20:58:03,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789117246] [2022-11-18 20:58:03,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:58:03,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 20:58:03,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:58:03,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 20:58:03,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:58:03,390 INFO L87 Difference]: Start difference. First operand 1237 states and 2041 transitions. Second operand has 25 states, 25 states have (on average 37.68) internal successors, (942), 25 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:20,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:20,525 INFO L93 Difference]: Finished difference Result 22545 states and 37259 transitions. [2022-11-18 20:58:20,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-11-18 20:58:20,526 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 37.68) internal successors, (942), 25 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 330 [2022-11-18 20:58:20,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:20,567 INFO L225 Difference]: With dead ends: 22545 [2022-11-18 20:58:20,567 INFO L226 Difference]: Without dead ends: 21500 [2022-11-18 20:58:20,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 803 GetRequests, 679 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5349 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3022, Invalid=12728, Unknown=0, NotChecked=0, Total=15750 [2022-11-18 20:58:20,575 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 80024 mSDsluCounter, 4676 mSDsCounter, 0 mSdLazyCounter, 12012 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80024 SdHoareTripleChecker+Valid, 4905 SdHoareTripleChecker+Invalid, 12085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 12012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:20,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80024 Valid, 4905 Invalid, 12085 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [73 Valid, 12012 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time] [2022-11-18 20:58:20,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21500 states. [2022-11-18 20:58:20,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21500 to 1317. [2022-11-18 20:58:20,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1316 states have (on average 1.6519756838905775) internal successors, (2174), 1316 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:20,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 2174 transitions. [2022-11-18 20:58:20,699 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 2174 transitions. Word has length 330 [2022-11-18 20:58:20,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:20,699 INFO L495 AbstractCegarLoop]: Abstraction has 1317 states and 2174 transitions. [2022-11-18 20:58:20,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 37.68) internal successors, (942), 25 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:20,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 2174 transitions. [2022-11-18 20:58:20,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-11-18 20:58:20,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:20,704 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:20,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:20,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:58:20,933 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:58:20,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:20,933 INFO L85 PathProgramCache]: Analyzing trace with hash 399143139, now seen corresponding path program 1 times [2022-11-18 20:58:20,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:58:20,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619145366] [2022-11-18 20:58:20,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:20,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:58:23,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 36 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:35,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:58:35,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619145366] [2022-11-18 20:58:35,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619145366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:58:35,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066762398] [2022-11-18 20:58:35,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:35,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:58:35,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:58:35,057 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:58:35,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 20:58:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:36,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 2546 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-18 20:58:36,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:39,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 36 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:45,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066762398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:58:45,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:58:45,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 13] total 34 [2022-11-18 20:58:45,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854046940] [2022-11-18 20:58:45,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:58:45,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 20:58:45,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:58:45,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 20:58:45,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 20:58:45,319 INFO L87 Difference]: Start difference. First operand 1317 states and 2174 transitions. Second operand has 34 states, 34 states have (on average 27.970588235294116) internal successors, (951), 34 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:59:13,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:13,335 INFO L93 Difference]: Finished difference Result 28940 states and 47860 transitions. [2022-11-18 20:59:13,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-11-18 20:59:13,336 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 27.970588235294116) internal successors, (951), 34 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 331 [2022-11-18 20:59:13,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:13,362 INFO L225 Difference]: With dead ends: 28940 [2022-11-18 20:59:13,362 INFO L226 Difference]: Without dead ends: 27746 [2022-11-18 20:59:13,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 892 GetRequests, 675 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17833 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=7790, Invalid=39952, Unknown=0, NotChecked=0, Total=47742 [2022-11-18 20:59:13,377 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 72801 mSDsluCounter, 7178 mSDsCounter, 0 mSdLazyCounter, 18417 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72801 SdHoareTripleChecker+Valid, 7402 SdHoareTripleChecker+Invalid, 18475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 18417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:59:13,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72801 Valid, 7402 Invalid, 18475 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [58 Valid, 18417 Invalid, 0 Unknown, 0 Unchecked, 16.9s Time] [2022-11-18 20:59:13,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27746 states. [2022-11-18 20:59:13,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27746 to 1362. [2022-11-18 20:59:13,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1361 states have (on average 1.6524614254224834) internal successors, (2249), 1361 states have internal predecessors, (2249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:59:13,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 2249 transitions. [2022-11-18 20:59:13,545 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 2249 transitions. Word has length 331 [2022-11-18 20:59:13,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:13,545 INFO L495 AbstractCegarLoop]: Abstraction has 1362 states and 2249 transitions. [2022-11-18 20:59:13,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 27.970588235294116) internal successors, (951), 34 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:59:13,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 2249 transitions. [2022-11-18 20:59:13,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-11-18 20:59:13,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:13,551 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:13,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:13,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 20:59:13,768 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:59:13,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:13,769 INFO L85 PathProgramCache]: Analyzing trace with hash 354665855, now seen corresponding path program 1 times [2022-11-18 20:59:13,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:59:13,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929684389] [2022-11-18 20:59:13,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:13,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:59:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 30 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:59:33,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:59:33,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929684389] [2022-11-18 20:59:33,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929684389] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:59:33,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086785876] [2022-11-18 20:59:33,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:33,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:59:33,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:59:33,030 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:59:33,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 20:59:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:34,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 2549 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-18 20:59:34,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:59:37,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 30 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:59:44,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086785876] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:44,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:59:44,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 15] total 40 [2022-11-18 20:59:44,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587603848] [2022-11-18 20:59:44,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:44,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-18 20:59:44,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:59:44,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-18 20:59:44,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1449, Unknown=0, NotChecked=0, Total=1560 [2022-11-18 20:59:44,263 INFO L87 Difference]: Start difference. First operand 1362 states and 2249 transitions. Second operand has 40 states, 40 states have (on average 24.0) internal successors, (960), 40 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:18,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:00:18,887 INFO L93 Difference]: Finished difference Result 30632 states and 50680 transitions. [2022-11-18 21:00:18,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 246 states. [2022-11-18 21:00:18,887 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 24.0) internal successors, (960), 40 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 332 [2022-11-18 21:00:18,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:00:18,914 INFO L225 Difference]: With dead ends: 30632 [2022-11-18 21:00:18,915 INFO L226 Difference]: Without dead ends: 29390 [2022-11-18 21:00:18,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 952 GetRequests, 673 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30231 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=12193, Invalid=66487, Unknown=0, NotChecked=0, Total=78680 [2022-11-18 21:00:18,927 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 90046 mSDsluCounter, 8433 mSDsCounter, 0 mSdLazyCounter, 21834 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90046 SdHoareTripleChecker+Valid, 8652 SdHoareTripleChecker+Invalid, 21889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 21834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:00:18,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90046 Valid, 8652 Invalid, 21889 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [55 Valid, 21834 Invalid, 0 Unknown, 0 Unchecked, 18.2s Time] [2022-11-18 21:00:18,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29390 states. [2022-11-18 21:00:19,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29390 to 1398. [2022-11-18 21:00:19,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 1.6528274874731568) internal successors, (2309), 1397 states have internal predecessors, (2309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:19,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 2309 transitions. [2022-11-18 21:00:19,095 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 2309 transitions. Word has length 332 [2022-11-18 21:00:19,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:00:19,096 INFO L495 AbstractCegarLoop]: Abstraction has 1398 states and 2309 transitions. [2022-11-18 21:00:19,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 24.0) internal successors, (960), 40 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:19,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 2309 transitions. [2022-11-18 21:00:19,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-11-18 21:00:19,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:00:19,101 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:00:19,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 21:00:19,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 21:00:19,320 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:00:19,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:00:19,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1609661107, now seen corresponding path program 1 times [2022-11-18 21:00:19,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:00:19,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777467692] [2022-11-18 21:00:19,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:00:19,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:00:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 18 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:41,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:00:41,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777467692] [2022-11-18 21:00:41,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777467692] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:00:41,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477046767] [2022-11-18 21:00:41,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:00:41,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:00:41,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:00:41,023 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:00:41,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 21:00:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:42,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 2552 conjuncts, 113 conjunts are in the unsatisfiable core [2022-11-18 21:00:42,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:45,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:00:52,688 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 24 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:52,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477046767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:00:52,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:00:52,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 49 [2022-11-18 21:00:52,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932427584] [2022-11-18 21:00:52,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:00:52,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-18 21:00:52,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:00:52,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-18 21:00:52,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2220, Unknown=0, NotChecked=0, Total=2352 [2022-11-18 21:00:52,691 INFO L87 Difference]: Start difference. First operand 1398 states and 2309 transitions. Second operand has 49 states, 49 states have (on average 19.897959183673468) internal successors, (975), 49 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:24,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:24,858 INFO L93 Difference]: Finished difference Result 102750 states and 170128 transitions. [2022-11-18 21:03:24,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1091 states. [2022-11-18 21:03:24,858 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 19.897959183673468) internal successors, (975), 49 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 333 [2022-11-18 21:03:24,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:24,971 INFO L225 Difference]: With dead ends: 102750 [2022-11-18 21:03:24,972 INFO L226 Difference]: Without dead ends: 101472 [2022-11-18 21:03:25,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1915 GetRequests, 782 SyntacticMatches, 0 SemanticMatches, 1133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610451 ImplicationChecksByTransitivity, 106.2s TimeCoverageRelationStatistics Valid=115984, Invalid=1171106, Unknown=0, NotChecked=0, Total=1287090 [2022-11-18 21:03:25,067 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 428942 mSDsluCounter, 9994 mSDsCounter, 0 mSdLazyCounter, 26042 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428942 SdHoareTripleChecker+Valid, 10204 SdHoareTripleChecker+Invalid, 26266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.6s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 26042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:25,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428942 Valid, 10204 Invalid, 26266 Unknown, 0 Unchecked, 0.6s Time], IncrementalHoareTripleChecker [224 Valid, 26042 Invalid, 0 Unknown, 0 Unchecked, 27.0s Time] [2022-11-18 21:03:25,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101472 states. [2022-11-18 21:03:25,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101472 to 1555. [2022-11-18 21:03:25,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1554 states have (on average 1.6531531531531531) internal successors, (2569), 1554 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:25,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2569 transitions. [2022-11-18 21:03:25,935 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2569 transitions. Word has length 333 [2022-11-18 21:03:25,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:25,936 INFO L495 AbstractCegarLoop]: Abstraction has 1555 states and 2569 transitions. [2022-11-18 21:03:25,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 19.897959183673468) internal successors, (975), 49 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:25,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2569 transitions. [2022-11-18 21:03:25,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-11-18 21:03:25,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:25,944 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:25,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:26,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7de7f28-dcde-4374-9270-f48f91a36592/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-18 21:03:26,161 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:03:26,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:26,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1136032435, now seen corresponding path program 1 times [2022-11-18 21:03:26,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:26,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488256502] [2022-11-18 21:03:26,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:26,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:28,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:28,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488256502] [2022-11-18 21:03:28,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488256502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:03:28,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:03:28,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 21:03:28,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417462081] [2022-11-18 21:03:28,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:03:28,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 21:03:28,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:28,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 21:03:28,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:03:28,305 INFO L87 Difference]: Start difference. First operand 1555 states and 2569 transitions. Second operand has 6 states, 6 states have (on average 55.666666666666664) internal successors, (334), 6 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:33,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:33,336 INFO L93 Difference]: Finished difference Result 8897 states and 14676 transitions. [2022-11-18 21:03:33,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:03:33,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 55.666666666666664) internal successors, (334), 6 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 334 [2022-11-18 21:03:33,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:33,349 INFO L225 Difference]: With dead ends: 8897 [2022-11-18 21:03:33,349 INFO L226 Difference]: Without dead ends: 7495 [2022-11-18 21:03:33,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-18 21:03:33,354 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 2319 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 4502 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2319 SdHoareTripleChecker+Valid, 1952 SdHoareTripleChecker+Invalid, 4504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:33,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2319 Valid, 1952 Invalid, 4504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4502 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-18 21:03:33,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7495 states. [2022-11-18 21:03:33,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7495 to 2547. [2022-11-18 21:03:33,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 2546 states have (on average 1.650039277297722) internal successors, (4201), 2546 states have internal predecessors, (4201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 4201 transitions. [2022-11-18 21:03:33,458 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 4201 transitions. Word has length 334 [2022-11-18 21:03:33,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:33,458 INFO L495 AbstractCegarLoop]: Abstraction has 2547 states and 4201 transitions. [2022-11-18 21:03:33,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 55.666666666666664) internal successors, (334), 6 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:33,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 4201 transitions. [2022-11-18 21:03:33,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-11-18 21:03:33,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:33,465 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:33,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-18 21:03:33,465 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:03:33,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:33,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1825159153, now seen corresponding path program 1 times [2022-11-18 21:03:33,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:33,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470770475] [2022-11-18 21:03:33,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:33,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms