./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/mem_slave_tlm.2.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/mem_slave_tlm.2.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 68ec02878969b041c7f7a32af94816f6626efeef23b5da7ea64f6e61f6ff6501 --- 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-b5237d8 [2022-11-21 16:56:22,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:56:22,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:56:22,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:56:22,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:56:22,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:56:22,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:56:22,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:56:22,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:56:22,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:56:22,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:56:22,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:56:22,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:56:22,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:56:22,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:56:22,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:56:22,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:56:22,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:56:22,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:56:22,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:56:22,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:56:22,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:56:22,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:56:22,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:56:22,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:56:22,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:56:22,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:56:22,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:56:22,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:56:22,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:56:22,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:56:22,243 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:56:22,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:56:22,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:56:22,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:56:22,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:56:22,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:56:22,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:56:22,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:56:22,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:56:22,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:56:22,251 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:56:22,287 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:56:22,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:56:22,288 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:56:22,288 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:56:22,289 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:56:22,289 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:56:22,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:56:22,290 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:56:22,291 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:56:22,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:56:22,292 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:56:22,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:56:22,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:56:22,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:56:22,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:56:22,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:56:22,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:56:22,293 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:56:22,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:56:22,293 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:56:22,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:56:22,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:56:22,294 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:56:22,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:56:22,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:56:22,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:56:22,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:56:22,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:56:22,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:56:22,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:56:22,296 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:56:22,296 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:56:22,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:56:22,297 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_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68ec02878969b041c7f7a32af94816f6626efeef23b5da7ea64f6e61f6ff6501 [2022-11-21 16:56:22,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:56:22,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:56:22,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:56:22,676 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:56:22,677 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:56:22,679 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/systemc/mem_slave_tlm.2.cil.c [2022-11-21 16:56:25,811 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:56:26,107 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:56:26,107 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/sv-benchmarks/c/systemc/mem_slave_tlm.2.cil.c [2022-11-21 16:56:26,120 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/data/d1e2fdcd0/f7684e423e744460acf90ec001285972/FLAGa876b1fc5 [2022-11-21 16:56:26,134 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/data/d1e2fdcd0/f7684e423e744460acf90ec001285972 [2022-11-21 16:56:26,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:56:26,139 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:56:26,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:56:26,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:56:26,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:56:26,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:56:26" (1/1) ... [2022-11-21 16:56:26,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d8cd6fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:56:26, skipping insertion in model container [2022-11-21 16:56:26,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:56:26" (1/1) ... [2022-11-21 16:56:26,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:56:26,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:56:26,343 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/sv-benchmarks/c/systemc/mem_slave_tlm.2.cil.c[646,659] [2022-11-21 16:56:26,468 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:56:26,491 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:56:26,502 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/sv-benchmarks/c/systemc/mem_slave_tlm.2.cil.c[646,659] [2022-11-21 16:56:26,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:56:26,585 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:56:26,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:56:26 WrapperNode [2022-11-21 16:56:26,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:56:26,587 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:56:26,587 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:56:26,587 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:56:26,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:56:26" (1/1) ... [2022-11-21 16:56:26,606 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:56:26" (1/1) ... [2022-11-21 16:56:26,643 INFO L138 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 851 [2022-11-21 16:56:26,644 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:56:26,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:56:26,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:56:26,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:56:26,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:56:26" (1/1) ... [2022-11-21 16:56:26,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:56:26" (1/1) ... [2022-11-21 16:56:26,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:56:26" (1/1) ... [2022-11-21 16:56:26,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:56:26" (1/1) ... [2022-11-21 16:56:26,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:56:26" (1/1) ... [2022-11-21 16:56:26,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:56:26" (1/1) ... [2022-11-21 16:56:26,685 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:56:26" (1/1) ... [2022-11-21 16:56:26,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:56:26" (1/1) ... [2022-11-21 16:56:26,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:56:26,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:56:26,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:56:26,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:56:26,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:56:26" (1/1) ... [2022-11-21 16:56:26,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:56:26,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:56:26,743 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:56:26,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:56:26,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:56:26,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:56:26,798 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-21 16:56:26,799 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-21 16:56:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:56:26,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:56:26,897 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:56:26,900 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:56:27,845 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:56:27,868 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:56:27,876 INFO L300 CfgBuilder]: Removed 13 assume(true) statements. [2022-11-21 16:56:27,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:56:27 BoogieIcfgContainer [2022-11-21 16:56:27,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:56:27,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:56:27,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:56:27,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:56:27,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:56:26" (1/3) ... [2022-11-21 16:56:27,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cdc3351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:56:27, skipping insertion in model container [2022-11-21 16:56:27,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:56:26" (2/3) ... [2022-11-21 16:56:27,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cdc3351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:56:27, skipping insertion in model container [2022-11-21 16:56:27,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:56:27" (3/3) ... [2022-11-21 16:56:27,892 INFO L112 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.2.cil.c [2022-11-21 16:56:27,913 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:56:27,913 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:56:28,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:56:28,011 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;@2b6d8f8a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:56:28,012 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 16:56:28,021 INFO L276 IsEmpty]: Start isEmpty. Operand has 273 states, 265 states have (on average 1.8528301886792453) internal successors, (491), 271 states have internal predecessors, (491), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-21 16:56:28,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-21 16:56:28,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:28,045 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] [2022-11-21 16:56:28,046 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:28,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:28,055 INFO L85 PathProgramCache]: Analyzing trace with hash 193086899, now seen corresponding path program 1 times [2022-11-21 16:56:28,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:28,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770319683] [2022-11-21 16:56:28,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:28,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:28,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:28,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770319683] [2022-11-21 16:56:28,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770319683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:56:28,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:56:28,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:56:28,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486012266] [2022-11-21 16:56:28,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:56:28,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:56:28,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:28,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:56:28,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:56:28,467 INFO L87 Difference]: Start difference. First operand has 273 states, 265 states have (on average 1.8528301886792453) internal successors, (491), 271 states have internal predecessors, (491), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:28,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:28,944 INFO L93 Difference]: Finished difference Result 718 states and 1317 transitions. [2022-11-21 16:56:28,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:56:28,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-21 16:56:28,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:28,959 INFO L225 Difference]: With dead ends: 718 [2022-11-21 16:56:28,959 INFO L226 Difference]: Without dead ends: 442 [2022-11-21 16:56:28,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:56:28,967 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 259 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:28,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 773 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:56:28,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-11-21 16:56:29,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 429. [2022-11-21 16:56:29,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 423 states have (on average 1.5933806146572105) internal successors, (674), 427 states have internal predecessors, (674), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:29,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 679 transitions. [2022-11-21 16:56:29,039 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 679 transitions. Word has length 29 [2022-11-21 16:56:29,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:29,039 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 679 transitions. [2022-11-21 16:56:29,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:29,040 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 679 transitions. [2022-11-21 16:56:29,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-21 16:56:29,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:29,042 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] [2022-11-21 16:56:29,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:56:29,043 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:29,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:29,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1317478755, now seen corresponding path program 1 times [2022-11-21 16:56:29,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:29,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925402419] [2022-11-21 16:56:29,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:29,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:29,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:29,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925402419] [2022-11-21 16:56:29,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925402419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:56:29,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:56:29,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:56:29,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317802117] [2022-11-21 16:56:29,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:56:29,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:56:29,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:29,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:56:29,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:56:29,179 INFO L87 Difference]: Start difference. First operand 429 states and 679 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:29,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:29,364 INFO L93 Difference]: Finished difference Result 1125 states and 1805 transitions. [2022-11-21 16:56:29,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:56:29,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-21 16:56:29,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:29,369 INFO L225 Difference]: With dead ends: 1125 [2022-11-21 16:56:29,369 INFO L226 Difference]: Without dead ends: 710 [2022-11-21 16:56:29,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:56:29,372 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 322 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:29,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 1016 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:56:29,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-11-21 16:56:29,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 697. [2022-11-21 16:56:29,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 691 states have (on average 1.6266280752532563) internal successors, (1124), 695 states have internal predecessors, (1124), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:29,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1129 transitions. [2022-11-21 16:56:29,421 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1129 transitions. Word has length 38 [2022-11-21 16:56:29,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:29,421 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 1129 transitions. [2022-11-21 16:56:29,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:29,422 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1129 transitions. [2022-11-21 16:56:29,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-21 16:56:29,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:29,424 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] [2022-11-21 16:56:29,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:56:29,425 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:29,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:29,426 INFO L85 PathProgramCache]: Analyzing trace with hash 851929906, now seen corresponding path program 1 times [2022-11-21 16:56:29,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:29,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417317231] [2022-11-21 16:56:29,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:29,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:29,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:29,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417317231] [2022-11-21 16:56:29,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417317231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:56:29,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:56:29,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:56:29,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900244687] [2022-11-21 16:56:29,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:56:29,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:56:29,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:29,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:56:29,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:56:29,536 INFO L87 Difference]: Start difference. First operand 697 states and 1129 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:29,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:29,609 INFO L93 Difference]: Finished difference Result 1761 states and 2852 transitions. [2022-11-21 16:56:29,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:56:29,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-21 16:56:29,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:29,616 INFO L225 Difference]: With dead ends: 1761 [2022-11-21 16:56:29,616 INFO L226 Difference]: Without dead ends: 1089 [2022-11-21 16:56:29,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:56:29,625 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 349 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:29,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 809 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:56:29,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2022-11-21 16:56:29,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 1078. [2022-11-21 16:56:29,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1072 states have (on average 1.617537313432836) internal successors, (1734), 1076 states have internal predecessors, (1734), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:29,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1739 transitions. [2022-11-21 16:56:29,691 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1739 transitions. Word has length 39 [2022-11-21 16:56:29,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:29,692 INFO L495 AbstractCegarLoop]: Abstraction has 1078 states and 1739 transitions. [2022-11-21 16:56:29,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:29,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1739 transitions. [2022-11-21 16:56:29,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-21 16:56:29,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:29,699 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:56:29,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:56:29,700 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:29,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:29,700 INFO L85 PathProgramCache]: Analyzing trace with hash 18237494, now seen corresponding path program 1 times [2022-11-21 16:56:29,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:29,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334864670] [2022-11-21 16:56:29,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:29,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:29,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:29,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:29,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334864670] [2022-11-21 16:56:29,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334864670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:56:29,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:56:29,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:56:29,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612637903] [2022-11-21 16:56:29,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:56:29,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:56:29,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:29,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:56:29,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:56:29,888 INFO L87 Difference]: Start difference. First operand 1078 states and 1739 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:30,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:30,325 INFO L93 Difference]: Finished difference Result 2970 states and 4767 transitions. [2022-11-21 16:56:30,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:56:30,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-21 16:56:30,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:30,334 INFO L225 Difference]: With dead ends: 2970 [2022-11-21 16:56:30,334 INFO L226 Difference]: Without dead ends: 1917 [2022-11-21 16:56:30,337 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 [2022-11-21 16:56:30,338 INFO L413 NwaCegarLoop]: 686 mSDtfsCounter, 580 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 1546 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:30,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 1546 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:56:30,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2022-11-21 16:56:30,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1684. [2022-11-21 16:56:30,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1678 states have (on average 1.5911799761620977) internal successors, (2670), 1682 states have internal predecessors, (2670), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:30,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 2675 transitions. [2022-11-21 16:56:30,429 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 2675 transitions. Word has length 48 [2022-11-21 16:56:30,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:30,454 INFO L495 AbstractCegarLoop]: Abstraction has 1684 states and 2675 transitions. [2022-11-21 16:56:30,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:30,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 2675 transitions. [2022-11-21 16:56:30,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-21 16:56:30,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:30,455 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] [2022-11-21 16:56:30,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:56:30,456 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:30,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:30,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1086799520, now seen corresponding path program 1 times [2022-11-21 16:56:30,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:30,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777426457] [2022-11-21 16:56:30,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:30,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:30,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:30,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777426457] [2022-11-21 16:56:30,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777426457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:56:30,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:56:30,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:56:30,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480274877] [2022-11-21 16:56:30,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:56:30,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:56:30,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:30,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:56:30,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:56:30,532 INFO L87 Difference]: Start difference. First operand 1684 states and 2675 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:31,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:31,115 INFO L93 Difference]: Finished difference Result 4997 states and 7840 transitions. [2022-11-21 16:56:31,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:56:31,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-21 16:56:31,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:31,129 INFO L225 Difference]: With dead ends: 4997 [2022-11-21 16:56:31,129 INFO L226 Difference]: Without dead ends: 3332 [2022-11-21 16:56:31,132 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 [2022-11-21 16:56:31,133 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 734 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:31,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 1045 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:56:31,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3332 states. [2022-11-21 16:56:31,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3332 to 2962. [2022-11-21 16:56:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2962 states, 2956 states have (on average 1.5639377537212449) internal successors, (4623), 2960 states have internal predecessors, (4623), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:31,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 4628 transitions. [2022-11-21 16:56:31,308 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 4628 transitions. Word has length 53 [2022-11-21 16:56:31,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:31,309 INFO L495 AbstractCegarLoop]: Abstraction has 2962 states and 4628 transitions. [2022-11-21 16:56:31,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:31,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 4628 transitions. [2022-11-21 16:56:31,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-21 16:56:31,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:31,311 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] [2022-11-21 16:56:31,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:56:31,312 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:31,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:31,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1057984617, now seen corresponding path program 1 times [2022-11-21 16:56:31,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:31,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608759334] [2022-11-21 16:56:31,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:31,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:31,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:31,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608759334] [2022-11-21 16:56:31,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608759334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:56:31,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:56:31,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:56:31,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29899853] [2022-11-21 16:56:31,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:56:31,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:56:31,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:31,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:56:31,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:56:31,358 INFO L87 Difference]: Start difference. First operand 2962 states and 4628 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:31,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:31,631 INFO L93 Difference]: Finished difference Result 6953 states and 10821 transitions. [2022-11-21 16:56:31,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:56:31,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-21 16:56:31,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:31,647 INFO L225 Difference]: With dead ends: 6953 [2022-11-21 16:56:31,648 INFO L226 Difference]: Without dead ends: 4014 [2022-11-21 16:56:31,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:56:31,657 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 364 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:31,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 704 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:56:31,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4014 states. [2022-11-21 16:56:31,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4014 to 3830. [2022-11-21 16:56:31,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3830 states, 3824 states have (on average 1.5431485355648535) internal successors, (5901), 3828 states have internal predecessors, (5901), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3830 states to 3830 states and 5906 transitions. [2022-11-21 16:56:31,987 INFO L78 Accepts]: Start accepts. Automaton has 3830 states and 5906 transitions. Word has length 53 [2022-11-21 16:56:31,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:31,988 INFO L495 AbstractCegarLoop]: Abstraction has 3830 states and 5906 transitions. [2022-11-21 16:56:31,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:31,988 INFO L276 IsEmpty]: Start isEmpty. Operand 3830 states and 5906 transitions. [2022-11-21 16:56:31,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-21 16:56:31,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:31,990 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] [2022-11-21 16:56:31,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 16:56:31,991 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:31,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:31,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1793836096, now seen corresponding path program 1 times [2022-11-21 16:56:31,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:31,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606487224] [2022-11-21 16:56:31,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:31,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:32,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:32,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606487224] [2022-11-21 16:56:32,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606487224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:56:32,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:56:32,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:56:32,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040957835] [2022-11-21 16:56:32,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:56:32,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:56:32,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:32,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:56:32,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:56:32,080 INFO L87 Difference]: Start difference. First operand 3830 states and 5906 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:32,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:32,667 INFO L93 Difference]: Finished difference Result 9202 states and 14308 transitions. [2022-11-21 16:56:32,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:56:32,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-11-21 16:56:32,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:32,692 INFO L225 Difference]: With dead ends: 9202 [2022-11-21 16:56:32,692 INFO L226 Difference]: Without dead ends: 5395 [2022-11-21 16:56:32,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:56:32,702 INFO L413 NwaCegarLoop]: 585 mSDtfsCounter, 246 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:32,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 873 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:56:32,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5395 states. [2022-11-21 16:56:33,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5395 to 4638. [2022-11-21 16:56:33,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4638 states, 4632 states have (on average 1.4853195164075994) internal successors, (6880), 4636 states have internal predecessors, (6880), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:33,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 6885 transitions. [2022-11-21 16:56:33,041 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 6885 transitions. Word has length 59 [2022-11-21 16:56:33,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:33,042 INFO L495 AbstractCegarLoop]: Abstraction has 4638 states and 6885 transitions. [2022-11-21 16:56:33,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:33,043 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 6885 transitions. [2022-11-21 16:56:33,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-21 16:56:33,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:33,045 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] [2022-11-21 16:56:33,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:56:33,046 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:33,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:33,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1530108436, now seen corresponding path program 1 times [2022-11-21 16:56:33,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:33,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476451723] [2022-11-21 16:56:33,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:33,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:33,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:33,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476451723] [2022-11-21 16:56:33,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476451723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:56:33,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:56:33,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:56:33,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334802145] [2022-11-21 16:56:33,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:56:33,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:56:33,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:33,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:56:33,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:56:33,171 INFO L87 Difference]: Start difference. First operand 4638 states and 6885 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:33,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:33,547 INFO L93 Difference]: Finished difference Result 9119 states and 13547 transitions. [2022-11-21 16:56:33,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:56:33,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-21 16:56:33,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:33,567 INFO L225 Difference]: With dead ends: 9119 [2022-11-21 16:56:33,568 INFO L226 Difference]: Without dead ends: 4504 [2022-11-21 16:56:33,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:56:33,576 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 341 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:33,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 439 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:56:33,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4504 states. [2022-11-21 16:56:33,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4504 to 4504. [2022-11-21 16:56:33,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4504 states, 4498 states have (on average 1.4626500666963094) internal successors, (6579), 4502 states have internal predecessors, (6579), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:33,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4504 states to 4504 states and 6584 transitions. [2022-11-21 16:56:33,982 INFO L78 Accepts]: Start accepts. Automaton has 4504 states and 6584 transitions. Word has length 61 [2022-11-21 16:56:33,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:33,983 INFO L495 AbstractCegarLoop]: Abstraction has 4504 states and 6584 transitions. [2022-11-21 16:56:33,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:33,983 INFO L276 IsEmpty]: Start isEmpty. Operand 4504 states and 6584 transitions. [2022-11-21 16:56:33,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-21 16:56:33,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:33,988 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] [2022-11-21 16:56:33,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:56:33,988 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:33,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:33,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1072243498, now seen corresponding path program 1 times [2022-11-21 16:56:33,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:33,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545437897] [2022-11-21 16:56:33,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:33,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:34,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:34,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545437897] [2022-11-21 16:56:34,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545437897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:56:34,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:56:34,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:56:34,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325317966] [2022-11-21 16:56:34,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:56:34,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:56:34,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:34,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:56:34,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:56:34,073 INFO L87 Difference]: Start difference. First operand 4504 states and 6584 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:34,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:34,483 INFO L93 Difference]: Finished difference Result 9652 states and 14286 transitions. [2022-11-21 16:56:34,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:56:34,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-11-21 16:56:34,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:34,504 INFO L225 Difference]: With dead ends: 9652 [2022-11-21 16:56:34,504 INFO L226 Difference]: Without dead ends: 5171 [2022-11-21 16:56:34,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:56:34,510 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 305 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:34,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 994 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:56:34,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5171 states. [2022-11-21 16:56:34,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5171 to 3478. [2022-11-21 16:56:34,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3478 states, 3472 states have (on average 1.4818548387096775) internal successors, (5145), 3476 states have internal predecessors, (5145), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:34,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3478 states to 3478 states and 5150 transitions. [2022-11-21 16:56:34,784 INFO L78 Accepts]: Start accepts. Automaton has 3478 states and 5150 transitions. Word has length 62 [2022-11-21 16:56:34,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:34,785 INFO L495 AbstractCegarLoop]: Abstraction has 3478 states and 5150 transitions. [2022-11-21 16:56:34,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:34,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3478 states and 5150 transitions. [2022-11-21 16:56:34,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-21 16:56:34,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:34,787 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] [2022-11-21 16:56:34,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 16:56:34,787 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:34,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:34,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1578233961, now seen corresponding path program 1 times [2022-11-21 16:56:34,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:34,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510137948] [2022-11-21 16:56:34,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:34,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:34,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:34,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:34,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510137948] [2022-11-21 16:56:34,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510137948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:56:34,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:56:34,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:56:34,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35520583] [2022-11-21 16:56:34,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:56:34,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:56:34,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:34,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:56:34,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:56:34,901 INFO L87 Difference]: Start difference. First operand 3478 states and 5150 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:36,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:36,838 INFO L93 Difference]: Finished difference Result 16552 states and 24345 transitions. [2022-11-21 16:56:36,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-21 16:56:36,839 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-21 16:56:36,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:36,890 INFO L225 Difference]: With dead ends: 16552 [2022-11-21 16:56:36,890 INFO L226 Difference]: Without dead ends: 13299 [2022-11-21 16:56:36,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-11-21 16:56:36,900 INFO L413 NwaCegarLoop]: 1066 mSDtfsCounter, 2103 mSDsluCounter, 2941 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2103 SdHoareTripleChecker+Valid, 4007 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:36,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2103 Valid, 4007 Invalid, 597 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-21 16:56:36,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13299 states. [2022-11-21 16:56:37,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13299 to 4348. [2022-11-21 16:56:37,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4348 states, 4342 states have (on average 1.4755872869645326) internal successors, (6407), 4346 states have internal predecessors, (6407), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:37,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4348 states to 4348 states and 6412 transitions. [2022-11-21 16:56:37,518 INFO L78 Accepts]: Start accepts. Automaton has 4348 states and 6412 transitions. Word has length 64 [2022-11-21 16:56:37,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:37,519 INFO L495 AbstractCegarLoop]: Abstraction has 4348 states and 6412 transitions. [2022-11-21 16:56:37,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:37,520 INFO L276 IsEmpty]: Start isEmpty. Operand 4348 states and 6412 transitions. [2022-11-21 16:56:37,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-21 16:56:37,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:37,521 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] [2022-11-21 16:56:37,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 16:56:37,522 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:37,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:37,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2113614342, now seen corresponding path program 1 times [2022-11-21 16:56:37,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:37,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071634294] [2022-11-21 16:56:37,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:37,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:37,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:37,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071634294] [2022-11-21 16:56:37,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071634294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:56:37,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:56:37,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 16:56:37,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756776894] [2022-11-21 16:56:37,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:56:37,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:56:37,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:37,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:56:37,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:56:37,624 INFO L87 Difference]: Start difference. First operand 4348 states and 6412 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:41,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:41,045 INFO L93 Difference]: Finished difference Result 30121 states and 44183 transitions. [2022-11-21 16:56:41,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-21 16:56:41,046 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-21 16:56:41,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:41,118 INFO L225 Difference]: With dead ends: 30121 [2022-11-21 16:56:41,118 INFO L226 Difference]: Without dead ends: 25998 [2022-11-21 16:56:41,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2022-11-21 16:56:41,127 INFO L413 NwaCegarLoop]: 1869 mSDtfsCounter, 3801 mSDsluCounter, 6724 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3801 SdHoareTripleChecker+Valid, 8593 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:41,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3801 Valid, 8593 Invalid, 329 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:56:41,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25998 states. [2022-11-21 16:56:41,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25998 to 4658. [2022-11-21 16:56:41,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4658 states, 4652 states have (on average 1.4658211521926052) internal successors, (6819), 4656 states have internal predecessors, (6819), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:41,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4658 states to 4658 states and 6824 transitions. [2022-11-21 16:56:41,702 INFO L78 Accepts]: Start accepts. Automaton has 4658 states and 6824 transitions. Word has length 65 [2022-11-21 16:56:41,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:41,702 INFO L495 AbstractCegarLoop]: Abstraction has 4658 states and 6824 transitions. [2022-11-21 16:56:41,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:41,703 INFO L276 IsEmpty]: Start isEmpty. Operand 4658 states and 6824 transitions. [2022-11-21 16:56:41,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-21 16:56:41,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:41,705 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:56:41,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 16:56:41,705 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:41,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:41,706 INFO L85 PathProgramCache]: Analyzing trace with hash 142613235, now seen corresponding path program 1 times [2022-11-21 16:56:41,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:41,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499703384] [2022-11-21 16:56:41,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:41,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:41,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:41,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499703384] [2022-11-21 16:56:41,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499703384] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:56:41,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:56:41,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:56:41,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311206769] [2022-11-21 16:56:41,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:56:41,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:56:41,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:41,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:56:41,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:56:41,744 INFO L87 Difference]: Start difference. First operand 4658 states and 6824 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:42,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:42,391 INFO L93 Difference]: Finished difference Result 9803 states and 14328 transitions. [2022-11-21 16:56:42,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:56:42,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-21 16:56:42,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:42,402 INFO L225 Difference]: With dead ends: 9803 [2022-11-21 16:56:42,402 INFO L226 Difference]: Without dead ends: 5166 [2022-11-21 16:56:42,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:56:42,410 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 131 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:42,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 810 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:56:42,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2022-11-21 16:56:43,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 5092. [2022-11-21 16:56:43,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5092 states, 5086 states have (on average 1.4598898938261895) internal successors, (7425), 5090 states have internal predecessors, (7425), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5092 states to 5092 states and 7430 transitions. [2022-11-21 16:56:43,152 INFO L78 Accepts]: Start accepts. Automaton has 5092 states and 7430 transitions. Word has length 79 [2022-11-21 16:56:43,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:43,153 INFO L495 AbstractCegarLoop]: Abstraction has 5092 states and 7430 transitions. [2022-11-21 16:56:43,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:43,153 INFO L276 IsEmpty]: Start isEmpty. Operand 5092 states and 7430 transitions. [2022-11-21 16:56:43,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-21 16:56:43,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:43,157 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-21 16:56:43,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 16:56:43,157 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:43,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:43,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1699220715, now seen corresponding path program 1 times [2022-11-21 16:56:43,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:43,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017358230] [2022-11-21 16:56:43,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:43,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:43,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:43,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017358230] [2022-11-21 16:56:43,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017358230] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:56:43,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:56:43,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:56:43,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075667706] [2022-11-21 16:56:43,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:56:43,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:56:43,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:43,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:56:43,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:56:43,241 INFO L87 Difference]: Start difference. First operand 5092 states and 7430 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:44,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:44,710 INFO L93 Difference]: Finished difference Result 13610 states and 19696 transitions. [2022-11-21 16:56:44,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:56:44,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-11-21 16:56:44,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:44,731 INFO L225 Difference]: With dead ends: 13610 [2022-11-21 16:56:44,731 INFO L226 Difference]: Without dead ends: 8417 [2022-11-21 16:56:44,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:56:44,739 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 646 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:44,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 1252 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:56:44,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8417 states. [2022-11-21 16:56:45,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8417 to 7555. [2022-11-21 16:56:45,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7555 states, 7549 states have (on average 1.4323751490263612) internal successors, (10813), 7553 states have internal predecessors, (10813), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:45,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7555 states to 7555 states and 10818 transitions. [2022-11-21 16:56:45,453 INFO L78 Accepts]: Start accepts. Automaton has 7555 states and 10818 transitions. Word has length 91 [2022-11-21 16:56:45,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:45,453 INFO L495 AbstractCegarLoop]: Abstraction has 7555 states and 10818 transitions. [2022-11-21 16:56:45,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:45,454 INFO L276 IsEmpty]: Start isEmpty. Operand 7555 states and 10818 transitions. [2022-11-21 16:56:45,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-21 16:56:45,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:45,457 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-21 16:56:45,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-21 16:56:45,457 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:45,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:45,458 INFO L85 PathProgramCache]: Analyzing trace with hash -414205958, now seen corresponding path program 1 times [2022-11-21 16:56:45,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:45,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061524943] [2022-11-21 16:56:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:45,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:45,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:45,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061524943] [2022-11-21 16:56:45,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061524943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:56:45,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:56:45,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:56:45,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534922398] [2022-11-21 16:56:45,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:56:45,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:56:45,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:45,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:56:45,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:56:45,516 INFO L87 Difference]: Start difference. First operand 7555 states and 10818 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:45,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:45,994 INFO L93 Difference]: Finished difference Result 10913 states and 15666 transitions. [2022-11-21 16:56:45,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:56:45,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-11-21 16:56:45,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:46,003 INFO L225 Difference]: With dead ends: 10913 [2022-11-21 16:56:46,004 INFO L226 Difference]: Without dead ends: 3361 [2022-11-21 16:56:46,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:56:46,013 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 335 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:46,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 517 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:56:46,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2022-11-21 16:56:46,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 3308. [2022-11-21 16:56:46,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3308 states, 3302 states have (on average 1.3452453058752272) internal successors, (4442), 3306 states have internal predecessors, (4442), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:46,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3308 states to 3308 states and 4447 transitions. [2022-11-21 16:56:46,419 INFO L78 Accepts]: Start accepts. Automaton has 3308 states and 4447 transitions. Word has length 99 [2022-11-21 16:56:46,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:46,420 INFO L495 AbstractCegarLoop]: Abstraction has 3308 states and 4447 transitions. [2022-11-21 16:56:46,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:46,420 INFO L276 IsEmpty]: Start isEmpty. Operand 3308 states and 4447 transitions. [2022-11-21 16:56:46,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-21 16:56:46,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:46,421 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-21 16:56:46,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-21 16:56:46,422 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:46,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:46,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1527373171, now seen corresponding path program 1 times [2022-11-21 16:56:46,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:46,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67860575] [2022-11-21 16:56:46,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:46,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:46,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:46,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:46,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67860575] [2022-11-21 16:56:46,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67860575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:56:46,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:56:46,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:56:46,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551454350] [2022-11-21 16:56:46,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:56:46,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:56:46,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:46,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:56:46,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:56:46,517 INFO L87 Difference]: Start difference. First operand 3308 states and 4447 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:47,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:47,715 INFO L93 Difference]: Finished difference Result 12664 states and 17028 transitions. [2022-11-21 16:56:47,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:56:47,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-11-21 16:56:47,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:47,733 INFO L225 Difference]: With dead ends: 12664 [2022-11-21 16:56:47,733 INFO L226 Difference]: Without dead ends: 9533 [2022-11-21 16:56:47,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:56:47,740 INFO L413 NwaCegarLoop]: 1070 mSDtfsCounter, 1525 mSDsluCounter, 2290 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1525 SdHoareTripleChecker+Valid, 3360 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:47,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1525 Valid, 3360 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:56:47,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9533 states. [2022-11-21 16:56:48,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9533 to 3310. [2022-11-21 16:56:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3310 states, 3304 states have (on average 1.3432203389830508) internal successors, (4438), 3308 states have internal predecessors, (4438), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:48,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3310 states to 3310 states and 4443 transitions. [2022-11-21 16:56:48,276 INFO L78 Accepts]: Start accepts. Automaton has 3310 states and 4443 transitions. Word has length 101 [2022-11-21 16:56:48,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:48,277 INFO L495 AbstractCegarLoop]: Abstraction has 3310 states and 4443 transitions. [2022-11-21 16:56:48,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:48,277 INFO L276 IsEmpty]: Start isEmpty. Operand 3310 states and 4443 transitions. [2022-11-21 16:56:48,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-21 16:56:48,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:48,281 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-21 16:56:48,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-21 16:56:48,281 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:48,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:48,282 INFO L85 PathProgramCache]: Analyzing trace with hash -653251672, now seen corresponding path program 1 times [2022-11-21 16:56:48,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:48,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514872465] [2022-11-21 16:56:48,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:48,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:48,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:48,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514872465] [2022-11-21 16:56:48,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514872465] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:56:48,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151013972] [2022-11-21 16:56:48,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:48,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:56:48,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:56:48,373 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:56:48,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:56:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:48,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 16:56:48,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:56:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 16:56:48,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:56:48,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151013972] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:56:48,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:56:48,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-21 16:56:48,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944917241] [2022-11-21 16:56:48,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:56:48,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:56:48,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:48,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:56:48,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:56:48,682 INFO L87 Difference]: Start difference. First operand 3310 states and 4443 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:49,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:49,415 INFO L93 Difference]: Finished difference Result 3945 states and 5288 transitions. [2022-11-21 16:56:49,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:56:49,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2022-11-21 16:56:49,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:49,422 INFO L225 Difference]: With dead ends: 3945 [2022-11-21 16:56:49,423 INFO L226 Difference]: Without dead ends: 3941 [2022-11-21 16:56:49,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:56:49,425 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 229 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:49,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 795 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:56:49,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3941 states. [2022-11-21 16:56:50,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3941 to 3891. [2022-11-21 16:56:50,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3891 states, 3885 states have (on average 1.3397683397683398) internal successors, (5205), 3889 states have internal predecessors, (5205), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:50,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3891 states to 3891 states and 5210 transitions. [2022-11-21 16:56:50,211 INFO L78 Accepts]: Start accepts. Automaton has 3891 states and 5210 transitions. Word has length 103 [2022-11-21 16:56:50,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:50,211 INFO L495 AbstractCegarLoop]: Abstraction has 3891 states and 5210 transitions. [2022-11-21 16:56:50,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:50,212 INFO L276 IsEmpty]: Start isEmpty. Operand 3891 states and 5210 transitions. [2022-11-21 16:56:50,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-21 16:56:50,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:50,215 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-21 16:56:50,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:56:50,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:56:50,421 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:50,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:50,422 INFO L85 PathProgramCache]: Analyzing trace with hash -182113054, now seen corresponding path program 1 times [2022-11-21 16:56:50,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:50,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804571333] [2022-11-21 16:56:50,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:50,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:50,565 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:50,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:50,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804571333] [2022-11-21 16:56:50,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804571333] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:56:50,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722002345] [2022-11-21 16:56:50,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:50,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:56:50,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:56:50,571 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:56:50,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:56:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:50,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 16:56:50,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:56:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 16:56:50,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:56:50,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722002345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:56:50,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:56:50,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-21 16:56:50,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417106946] [2022-11-21 16:56:50,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:56:50,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:56:50,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:50,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:56:50,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:56:50,861 INFO L87 Difference]: Start difference. First operand 3891 states and 5210 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:51,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:51,412 INFO L93 Difference]: Finished difference Result 6926 states and 9320 transitions. [2022-11-21 16:56:51,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:56:51,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2022-11-21 16:56:51,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:51,417 INFO L225 Difference]: With dead ends: 6926 [2022-11-21 16:56:51,418 INFO L226 Difference]: Without dead ends: 3040 [2022-11-21 16:56:51,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:56:51,425 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 260 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:51,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 418 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:56:51,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3040 states. [2022-11-21 16:56:51,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3040 to 2818. [2022-11-21 16:56:51,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2818 states, 2812 states have (on average 1.3182788051209104) internal successors, (3707), 2816 states have internal predecessors, (3707), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:51,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2818 states to 2818 states and 3712 transitions. [2022-11-21 16:56:51,899 INFO L78 Accepts]: Start accepts. Automaton has 2818 states and 3712 transitions. Word has length 157 [2022-11-21 16:56:51,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:51,899 INFO L495 AbstractCegarLoop]: Abstraction has 2818 states and 3712 transitions. [2022-11-21 16:56:51,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:51,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2818 states and 3712 transitions. [2022-11-21 16:56:51,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-21 16:56:51,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:51,902 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-21 16:56:51,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:56:52,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-21 16:56:52,108 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:52,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:52,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1837024668, now seen corresponding path program 1 times [2022-11-21 16:56:52,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:52,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420955337] [2022-11-21 16:56:52,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:52,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 16:56:52,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:52,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420955337] [2022-11-21 16:56:52,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420955337] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:56:52,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765077050] [2022-11-21 16:56:52,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:52,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:56:52,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:56:52,267 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:56:52,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:56:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:52,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 16:56:52,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:56:52,463 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 16:56:52,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:56:52,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765077050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:56:52,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:56:52,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-21 16:56:52,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765466214] [2022-11-21 16:56:52,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:56:52,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:56:52,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:52,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:56:52,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:56:52,465 INFO L87 Difference]: Start difference. First operand 2818 states and 3712 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:52,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:52,964 INFO L93 Difference]: Finished difference Result 5464 states and 7237 transitions. [2022-11-21 16:56:52,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:56:52,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-21 16:56:52,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:52,968 INFO L225 Difference]: With dead ends: 5464 [2022-11-21 16:56:52,969 INFO L226 Difference]: Without dead ends: 2818 [2022-11-21 16:56:52,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:56:52,973 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 270 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:52,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 390 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:56:52,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2022-11-21 16:56:53,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 2818. [2022-11-21 16:56:53,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2818 states, 2812 states have (on average 1.2841394025604551) internal successors, (3611), 2816 states have internal predecessors, (3611), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:53,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2818 states to 2818 states and 3616 transitions. [2022-11-21 16:56:53,441 INFO L78 Accepts]: Start accepts. Automaton has 2818 states and 3616 transitions. Word has length 160 [2022-11-21 16:56:53,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:53,443 INFO L495 AbstractCegarLoop]: Abstraction has 2818 states and 3616 transitions. [2022-11-21 16:56:53,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:53,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2818 states and 3616 transitions. [2022-11-21 16:56:53,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-21 16:56:53,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:53,448 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-21 16:56:53,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:56:53,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 16:56:53,655 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:53,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:53,655 INFO L85 PathProgramCache]: Analyzing trace with hash -321422549, now seen corresponding path program 1 times [2022-11-21 16:56:53,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:53,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537173686] [2022-11-21 16:56:53,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:53,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:53,791 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 16:56:53,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:53,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537173686] [2022-11-21 16:56:53,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537173686] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:56:53,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176967302] [2022-11-21 16:56:53,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:53,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:56:53,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:56:53,793 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:56:53,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:56:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:53,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 16:56:53,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:56:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 16:56:53,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:56:53,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176967302] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:56:53,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:56:53,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-21 16:56:53,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177832761] [2022-11-21 16:56:53,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:56:53,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:56:53,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:53,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:56:53,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:56:53,960 INFO L87 Difference]: Start difference. First operand 2818 states and 3616 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:54,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:54,811 INFO L93 Difference]: Finished difference Result 6367 states and 8330 transitions. [2022-11-21 16:56:54,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:56:54,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2022-11-21 16:56:54,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:54,817 INFO L225 Difference]: With dead ends: 6367 [2022-11-21 16:56:54,817 INFO L226 Difference]: Without dead ends: 3721 [2022-11-21 16:56:54,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:56:54,828 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 201 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:54,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 654 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:56:54,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2022-11-21 16:56:55,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3633. [2022-11-21 16:56:55,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3633 states, 3627 states have (on average 1.2514474772539288) internal successors, (4539), 3631 states have internal predecessors, (4539), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:55,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3633 states to 3633 states and 4544 transitions. [2022-11-21 16:56:55,246 INFO L78 Accepts]: Start accepts. Automaton has 3633 states and 4544 transitions. Word has length 161 [2022-11-21 16:56:55,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:55,246 INFO L495 AbstractCegarLoop]: Abstraction has 3633 states and 4544 transitions. [2022-11-21 16:56:55,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:55,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3633 states and 4544 transitions. [2022-11-21 16:56:55,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-21 16:56:55,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:55,249 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 16:56:55,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-21 16:56:55,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:56:55,458 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:55,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:55,458 INFO L85 PathProgramCache]: Analyzing trace with hash 920589941, now seen corresponding path program 1 times [2022-11-21 16:56:55,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:55,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851357752] [2022-11-21 16:56:55,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:55,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:55,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 16:56:55,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:55,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851357752] [2022-11-21 16:56:55,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851357752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:56:55,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234056318] [2022-11-21 16:56:55,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:55,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:56:55,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:56:55,840 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:56:55,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:56:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:55,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 16:56:55,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:56:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 16:56:56,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:56:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 16:56:56,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234056318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:56:56,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:56:56,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-11-21 16:56:56,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647149761] [2022-11-21 16:56:56,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:56:56,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:56:56,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:56,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:56:56,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:56:56,557 INFO L87 Difference]: Start difference. First operand 3633 states and 4544 transitions. Second operand has 10 states, 10 states have (on average 16.2) internal successors, (162), 10 states have internal predecessors, (162), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:59,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:59,834 INFO L93 Difference]: Finished difference Result 19257 states and 24206 transitions. [2022-11-21 16:56:59,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-21 16:56:59,835 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 16.2) internal successors, (162), 10 states have internal predecessors, (162), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2022-11-21 16:56:59,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:59,856 INFO L225 Difference]: With dead ends: 19257 [2022-11-21 16:56:59,857 INFO L226 Difference]: Without dead ends: 15796 [2022-11-21 16:56:59,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 338 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2022-11-21 16:56:59,867 INFO L413 NwaCegarLoop]: 859 mSDtfsCounter, 5090 mSDsluCounter, 4816 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5090 SdHoareTripleChecker+Valid, 5675 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:59,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5090 Valid, 5675 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 16:56:59,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15796 states. [2022-11-21 16:57:00,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15796 to 5146. [2022-11-21 16:57:00,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5146 states, 5140 states have (on average 1.2560311284046692) internal successors, (6456), 5144 states have internal predecessors, (6456), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:00,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5146 states to 5146 states and 6461 transitions. [2022-11-21 16:57:00,851 INFO L78 Accepts]: Start accepts. Automaton has 5146 states and 6461 transitions. Word has length 163 [2022-11-21 16:57:00,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:57:00,852 INFO L495 AbstractCegarLoop]: Abstraction has 5146 states and 6461 transitions. [2022-11-21 16:57:00,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.2) internal successors, (162), 10 states have internal predecessors, (162), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:00,852 INFO L276 IsEmpty]: Start isEmpty. Operand 5146 states and 6461 transitions. [2022-11-21 16:57:00,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-11-21 16:57:00,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:57:00,857 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 16:57:00,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:57:01,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:57:01,063 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:57:01,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:01,064 INFO L85 PathProgramCache]: Analyzing trace with hash -763703227, now seen corresponding path program 1 times [2022-11-21 16:57:01,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:01,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144243541] [2022-11-21 16:57:01,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:01,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 103 proven. 103 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:57:01,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:01,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144243541] [2022-11-21 16:57:01,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144243541] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:57:01,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917429836] [2022-11-21 16:57:01,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:01,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:57:01,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:57:01,348 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:57:01,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:57:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:01,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 16:57:01,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:57:01,858 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 206 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:57:01,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:57:01,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917429836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:57:01,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:57:01,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2022-11-21 16:57:01,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883115152] [2022-11-21 16:57:01,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:57:01,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:57:01,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:57:01,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:57:01,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:57:01,861 INFO L87 Difference]: Start difference. First operand 5146 states and 6461 transitions. Second operand has 7 states, 7 states have (on average 36.714285714285715) internal successors, (257), 7 states have internal predecessors, (257), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:03,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:57:03,566 INFO L93 Difference]: Finished difference Result 11313 states and 14214 transitions. [2022-11-21 16:57:03,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:57:03,567 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 36.714285714285715) internal successors, (257), 7 states have internal predecessors, (257), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2022-11-21 16:57:03,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:57:03,575 INFO L225 Difference]: With dead ends: 11313 [2022-11-21 16:57:03,575 INFO L226 Difference]: Without dead ends: 6336 [2022-11-21 16:57:03,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:57:03,582 INFO L413 NwaCegarLoop]: 882 mSDtfsCounter, 1410 mSDsluCounter, 1679 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1410 SdHoareTripleChecker+Valid, 2561 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:57:03,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1410 Valid, 2561 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:57:03,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6336 states. [2022-11-21 16:57:04,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6336 to 5015. [2022-11-21 16:57:04,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5015 states, 5009 states have (on average 1.2537432621281692) internal successors, (6280), 5013 states have internal predecessors, (6280), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:04,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5015 states to 5015 states and 6285 transitions. [2022-11-21 16:57:04,215 INFO L78 Accepts]: Start accepts. Automaton has 5015 states and 6285 transitions. Word has length 263 [2022-11-21 16:57:04,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:57:04,216 INFO L495 AbstractCegarLoop]: Abstraction has 5015 states and 6285 transitions. [2022-11-21 16:57:04,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 36.714285714285715) internal successors, (257), 7 states have internal predecessors, (257), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:04,216 INFO L276 IsEmpty]: Start isEmpty. Operand 5015 states and 6285 transitions. [2022-11-21 16:57:04,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-11-21 16:57:04,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:57:04,218 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 16:57:04,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:57:04,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:57:04,422 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:57:04,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:04,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1019295115, now seen corresponding path program 1 times [2022-11-21 16:57:04,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:04,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774448014] [2022-11-21 16:57:04,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:04,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-21 16:57:04,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:04,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774448014] [2022-11-21 16:57:04,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774448014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:57:04,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:57:04,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:57:04,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157907285] [2022-11-21 16:57:04,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:57:04,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:57:04,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:57:04,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:57:04,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:57:04,516 INFO L87 Difference]: Start difference. First operand 5015 states and 6285 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:04,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:57:04,891 INFO L93 Difference]: Finished difference Result 5886 states and 7262 transitions. [2022-11-21 16:57:04,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:57:04,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 264 [2022-11-21 16:57:04,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:57:04,893 INFO L225 Difference]: With dead ends: 5886 [2022-11-21 16:57:04,893 INFO L226 Difference]: Without dead ends: 924 [2022-11-21 16:57:04,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:57:04,898 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 130 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:57:04,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 388 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:57:04,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-11-21 16:57:05,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 921. [2022-11-21 16:57:05,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 917 states have (on average 1.0828789531079608) internal successors, (993), 919 states have internal predecessors, (993), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:05,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 996 transitions. [2022-11-21 16:57:05,082 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 996 transitions. Word has length 264 [2022-11-21 16:57:05,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:57:05,082 INFO L495 AbstractCegarLoop]: Abstraction has 921 states and 996 transitions. [2022-11-21 16:57:05,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:05,083 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 996 transitions. [2022-11-21 16:57:05,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-11-21 16:57:05,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:57:05,085 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 16:57:05,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-21 16:57:05,086 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:57:05,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:05,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1686235295, now seen corresponding path program 1 times [2022-11-21 16:57:05,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:05,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395954130] [2022-11-21 16:57:05,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:05,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-21 16:57:05,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:05,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395954130] [2022-11-21 16:57:05,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395954130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:57:05,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:57:05,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 16:57:05,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409663270] [2022-11-21 16:57:05,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:57:05,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:57:05,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:57:05,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:57:05,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:57:05,323 INFO L87 Difference]: Start difference. First operand 921 states and 996 transitions. Second operand has 7 states, 7 states have (on average 24.285714285714285) internal successors, (170), 7 states have internal predecessors, (170), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:05,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:57:05,923 INFO L93 Difference]: Finished difference Result 1898 states and 2058 transitions. [2022-11-21 16:57:05,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 16:57:05,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.285714285714285) internal successors, (170), 7 states have internal predecessors, (170), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 265 [2022-11-21 16:57:05,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:57:05,926 INFO L225 Difference]: With dead ends: 1898 [2022-11-21 16:57:05,926 INFO L226 Difference]: Without dead ends: 1597 [2022-11-21 16:57:05,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:57:05,927 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 863 mSDsluCounter, 1902 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 2389 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:57:05,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [863 Valid, 2389 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:57:05,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2022-11-21 16:57:06,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 919. [2022-11-21 16:57:06,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 915 states have (on average 1.0786885245901638) internal successors, (987), 917 states have internal predecessors, (987), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:06,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 990 transitions. [2022-11-21 16:57:06,073 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 990 transitions. Word has length 265 [2022-11-21 16:57:06,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:57:06,074 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 990 transitions. [2022-11-21 16:57:06,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.285714285714285) internal successors, (170), 7 states have internal predecessors, (170), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:06,075 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 990 transitions. [2022-11-21 16:57:06,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-21 16:57:06,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:57:06,077 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 16:57:06,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-21 16:57:06,078 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:57:06,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:06,078 INFO L85 PathProgramCache]: Analyzing trace with hash -232946174, now seen corresponding path program 1 times [2022-11-21 16:57:06,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:06,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176576332] [2022-11-21 16:57:06,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:06,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-21 16:57:06,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:06,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176576332] [2022-11-21 16:57:06,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176576332] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:57:06,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:57:06,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:57:06,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26114590] [2022-11-21 16:57:06,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:57:06,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:57:06,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:57:06,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:57:06,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:57:06,208 INFO L87 Difference]: Start difference. First operand 919 states and 990 transitions. Second operand has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:06,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:57:06,528 INFO L93 Difference]: Finished difference Result 1448 states and 1564 transitions. [2022-11-21 16:57:06,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:57:06,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-21 16:57:06,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:57:06,531 INFO L225 Difference]: With dead ends: 1448 [2022-11-21 16:57:06,531 INFO L226 Difference]: Without dead ends: 1145 [2022-11-21 16:57:06,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:57:06,532 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 429 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:57:06,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 913 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:57:06,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2022-11-21 16:57:06,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 902. [2022-11-21 16:57:06,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 899 states have (on average 1.0622914349276975) internal successors, (955), 900 states have internal predecessors, (955), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:06,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 957 transitions. [2022-11-21 16:57:06,682 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 957 transitions. Word has length 266 [2022-11-21 16:57:06,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:57:06,683 INFO L495 AbstractCegarLoop]: Abstraction has 902 states and 957 transitions. [2022-11-21 16:57:06,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:06,683 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 957 transitions. [2022-11-21 16:57:06,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2022-11-21 16:57:06,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:57:06,686 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 16:57:06,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-21 16:57:06,686 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:57:06,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:06,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1219154648, now seen corresponding path program 1 times [2022-11-21 16:57:06,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:06,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429457127] [2022-11-21 16:57:06,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:06,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 38 proven. 142 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-21 16:57:08,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:08,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429457127] [2022-11-21 16:57:08,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429457127] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:57:08,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648025765] [2022-11-21 16:57:08,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:08,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:57:08,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:57:08,034 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:57:08,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:57:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:08,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-21 16:57:08,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:57:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 40 proven. 123 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-21 16:57:09,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:57:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 148 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-21 16:57:09,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648025765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:57:09,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:57:09,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 30 [2022-11-21 16:57:09,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565020159] [2022-11-21 16:57:09,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:57:09,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-21 16:57:09,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:57:09,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-21 16:57:09,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2022-11-21 16:57:09,844 INFO L87 Difference]: Start difference. First operand 902 states and 957 transitions. Second operand has 30 states, 30 states have (on average 13.766666666666667) internal successors, (413), 30 states have internal predecessors, (413), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:11,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:57:11,097 INFO L93 Difference]: Finished difference Result 1224 states and 1303 transitions. [2022-11-21 16:57:11,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-21 16:57:11,098 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 13.766666666666667) internal successors, (413), 30 states have internal predecessors, (413), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 325 [2022-11-21 16:57:11,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:57:11,099 INFO L225 Difference]: With dead ends: 1224 [2022-11-21 16:57:11,099 INFO L226 Difference]: Without dead ends: 1221 [2022-11-21 16:57:11,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 643 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=383, Invalid=2269, Unknown=0, NotChecked=0, Total=2652 [2022-11-21 16:57:11,101 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 2917 mSDsluCounter, 6487 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2917 SdHoareTripleChecker+Valid, 6876 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:57:11,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2917 Valid, 6876 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:57:11,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2022-11-21 16:57:11,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 902. [2022-11-21 16:57:11,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 899 states have (on average 1.061179087875417) internal successors, (954), 900 states have internal predecessors, (954), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:11,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 956 transitions. [2022-11-21 16:57:11,273 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 956 transitions. Word has length 325 [2022-11-21 16:57:11,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:57:11,273 INFO L495 AbstractCegarLoop]: Abstraction has 902 states and 956 transitions. [2022-11-21 16:57:11,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 13.766666666666667) internal successors, (413), 30 states have internal predecessors, (413), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:11,273 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 956 transitions. [2022-11-21 16:57:11,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2022-11-21 16:57:11,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:57:11,277 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 16:57:11,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 16:57:11,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:57:11,479 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:57:11,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:11,480 INFO L85 PathProgramCache]: Analyzing trace with hash 200109303, now seen corresponding path program 1 times [2022-11-21 16:57:11,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:11,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844457273] [2022-11-21 16:57:11,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:11,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:11,968 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 139 proven. 48 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-21 16:57:11,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:11,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844457273] [2022-11-21 16:57:11,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844457273] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:57:11,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102772540] [2022-11-21 16:57:11,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:11,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:57:11,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:57:11,970 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:57:12,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 16:57:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:12,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 16:57:12,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:57:12,503 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 139 proven. 48 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-21 16:57:12,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:57:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 139 proven. 48 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-21 16:57:12,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102772540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:57:12,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:57:12,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-11-21 16:57:12,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675951740] [2022-11-21 16:57:12,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:57:12,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:57:12,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:57:12,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:57:12,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:57:12,822 INFO L87 Difference]: Start difference. First operand 902 states and 956 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:13,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:57:13,432 INFO L93 Difference]: Finished difference Result 1252 states and 1331 transitions. [2022-11-21 16:57:13,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 16:57:13,433 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 372 [2022-11-21 16:57:13,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:57:13,435 INFO L225 Difference]: With dead ends: 1252 [2022-11-21 16:57:13,435 INFO L226 Difference]: Without dead ends: 1148 [2022-11-21 16:57:13,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 769 GetRequests, 748 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-11-21 16:57:13,437 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 934 mSDsluCounter, 2735 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 3196 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:57:13,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [934 Valid, 3196 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:57:13,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2022-11-21 16:57:13,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 901. [2022-11-21 16:57:13,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 899 states have (on average 1.0567296996662958) internal successors, (950), 899 states have internal predecessors, (950), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:13,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 951 transitions. [2022-11-21 16:57:13,684 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 951 transitions. Word has length 372 [2022-11-21 16:57:13,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:57:13,685 INFO L495 AbstractCegarLoop]: Abstraction has 901 states and 951 transitions. [2022-11-21 16:57:13,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:13,685 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 951 transitions. [2022-11-21 16:57:13,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2022-11-21 16:57:13,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:57:13,689 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 16:57:13,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 16:57:13,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-21 16:57:13,896 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:57:13,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:13,896 INFO L85 PathProgramCache]: Analyzing trace with hash 2022630306, now seen corresponding path program 1 times [2022-11-21 16:57:13,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:13,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007945882] [2022-11-21 16:57:13,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:13,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 73 proven. 357 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:57:15,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:15,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007945882] [2022-11-21 16:57:15,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007945882] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:57:15,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493704252] [2022-11-21 16:57:15,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:15,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:57:15,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:57:15,456 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:57:15,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 16:57:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:15,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 1212 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-21 16:57:15,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:57:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 91 proven. 339 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:57:17,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:57:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 20 proven. 410 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:57:18,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493704252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:57:18,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:57:18,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 35 [2022-11-21 16:57:18,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783530816] [2022-11-21 16:57:18,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:57:18,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-21 16:57:18,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:57:18,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-21 16:57:18,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1099, Unknown=0, NotChecked=0, Total=1190 [2022-11-21 16:57:18,094 INFO L87 Difference]: Start difference. First operand 901 states and 951 transitions. Second operand has 35 states, 35 states have (on average 18.914285714285715) internal successors, (662), 35 states have internal predecessors, (662), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:19,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:57:19,787 INFO L93 Difference]: Finished difference Result 1148 states and 1216 transitions. [2022-11-21 16:57:19,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-21 16:57:19,788 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 18.914285714285715) internal successors, (662), 35 states have internal predecessors, (662), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 433 [2022-11-21 16:57:19,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:57:19,789 INFO L225 Difference]: With dead ends: 1148 [2022-11-21 16:57:19,789 INFO L226 Difference]: Without dead ends: 0 [2022-11-21 16:57:19,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 937 GetRequests, 866 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=547, Invalid=4145, Unknown=0, NotChecked=0, Total=4692 [2022-11-21 16:57:19,792 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 3464 mSDsluCounter, 10752 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3464 SdHoareTripleChecker+Valid, 11307 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:57:19,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3464 Valid, 11307 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 16:57:19,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-21 16:57:19,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-21 16:57:19,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:19,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-21 16:57:19,794 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 433 [2022-11-21 16:57:19,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:57:19,794 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-21 16:57:19,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 18.914285714285715) internal successors, (662), 35 states have internal predecessors, (662), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:19,794 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-21 16:57:19,795 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-21 16:57:19,797 INFO L805 garLoopResultBuilder]: Registering result SAFE for location errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-21 16:57:19,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 16:57:20,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3c2e48-bdbc-4630-986d-73fc54bd885a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-21 16:57:20,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-21 17:05:10,464 WARN L233 SmtUtils]: Spent 7.84m on a formula simplification. DAG size of input: 295 DAG size of output: 291 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-21 17:05:59,031 WARN L233 SmtUtils]: Spent 43.39s on a formula simplification. DAG size of input: 168 DAG size of output: 162 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-21 17:08:48,953 WARN L233 SmtUtils]: Spent 2.80m on a formula simplification. DAG size of input: 418 DAG size of output: 398 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)