./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f949838c97095a42d5e6540bf73aedcc362763afd8b26091976cc471e7bc2aab --- 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-5e519f3 [2022-11-02 20:49:33,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:49:33,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:49:33,239 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:49:33,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:49:33,244 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:49:33,246 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:49:33,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:49:33,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:49:33,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:49:33,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:49:33,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:49:33,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:49:33,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:49:33,269 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:49:33,270 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:49:33,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:49:33,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:49:33,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:49:33,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:49:33,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:49:33,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:49:33,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:49:33,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:49:33,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:49:33,303 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:49:33,303 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:49:33,305 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:49:33,306 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:49:33,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:49:33,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:49:33,310 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:49:33,312 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:49:33,314 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:49:33,315 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:49:33,315 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:49:33,316 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:49:33,317 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:49:33,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:49:33,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:49:33,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:49:33,320 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-02 20:49:33,359 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:49:33,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:49:33,360 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:49:33,361 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:49:33,362 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:49:33,362 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:49:33,363 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:49:33,363 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:49:33,363 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:49:33,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:49:33,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:49:33,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:49:33,365 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:49:33,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:49:33,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:49:33,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:49:33,366 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:49:33,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:49:33,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:49:33,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:49:33,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:49:33,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:49:33,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:49:33,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:49:33,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:49:33,368 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:49:33,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:49:33,368 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:49:33,368 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:49:33,368 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:49:33,369 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_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f949838c97095a42d5e6540bf73aedcc362763afd8b26091976cc471e7bc2aab [2022-11-02 20:49:33,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:49:33,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:49:33,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:49:33,743 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:49:33,744 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:49:33,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c [2022-11-02 20:49:33,825 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/data/0845aabec/afbf5a95aa2c48b4b93aa743dbe3ecc7/FLAGec3c9668d [2022-11-02 20:49:34,405 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:49:34,406 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c [2022-11-02 20:49:34,426 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/data/0845aabec/afbf5a95aa2c48b4b93aa743dbe3ecc7/FLAGec3c9668d [2022-11-02 20:49:34,713 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/data/0845aabec/afbf5a95aa2c48b4b93aa743dbe3ecc7 [2022-11-02 20:49:34,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:49:34,719 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:49:34,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:49:34,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:49:34,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:49:34,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:49:34" (1/1) ... [2022-11-02 20:49:34,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10890e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:34, skipping insertion in model container [2022-11-02 20:49:34,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:49:34" (1/1) ... [2022-11-02 20:49:34,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:49:34,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:49:34,965 WARN L230 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_252b96d1-8eaa-4e68-bdbf-d474b6e06502/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c[1107,1120] [2022-11-02 20:49:35,097 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:49:35,100 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:49:35,111 WARN L230 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_252b96d1-8eaa-4e68-bdbf-d474b6e06502/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c[1107,1120] [2022-11-02 20:49:35,177 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:49:35,192 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:49:35,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:35 WrapperNode [2022-11-02 20:49:35,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:49:35,193 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:49:35,194 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:49:35,194 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:49:35,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:35" (1/1) ... [2022-11-02 20:49:35,221 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:35" (1/1) ... [2022-11-02 20:49:35,319 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 571 [2022-11-02 20:49:35,319 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:49:35,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:49:35,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:49:35,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:49:35,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:35" (1/1) ... [2022-11-02 20:49:35,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:35" (1/1) ... [2022-11-02 20:49:35,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:35" (1/1) ... [2022-11-02 20:49:35,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:35" (1/1) ... [2022-11-02 20:49:35,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:35" (1/1) ... [2022-11-02 20:49:35,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:35" (1/1) ... [2022-11-02 20:49:35,364 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:35" (1/1) ... [2022-11-02 20:49:35,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:35" (1/1) ... [2022-11-02 20:49:35,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:49:35,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:49:35,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:49:35,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:49:35,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:35" (1/1) ... [2022-11-02 20:49:35,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:49:35,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:35,436 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:49:35,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:49:35,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:49:35,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:49:35,724 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:49:35,727 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:49:36,526 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:49:36,539 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:49:36,540 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:49:36,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:49:36 BoogieIcfgContainer [2022-11-02 20:49:36,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:49:36,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:49:36,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:49:36,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:49:36,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:49:34" (1/3) ... [2022-11-02 20:49:36,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72262f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:49:36, skipping insertion in model container [2022-11-02 20:49:36,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:35" (2/3) ... [2022-11-02 20:49:36,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72262f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:49:36, skipping insertion in model container [2022-11-02 20:49:36,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:49:36" (3/3) ... [2022-11-02 20:49:36,556 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c [2022-11-02 20:49:36,579 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:49:36,580 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:49:36,663 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:49:36,672 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;@e812700, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:49:36,672 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:49:36,688 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 85 states have (on average 1.4941176470588236) internal successors, (127), 86 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:36,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-02 20:49:36,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:36,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-02 20:49:36,695 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:36,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:36,703 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-02 20:49:36,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:36,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176774747] [2022-11-02 20:49:36,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:36,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:37,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:37,092 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:49:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:37,316 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:49:37,323 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:49:37,324 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-02 20:49:37,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:49:37,331 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-02 20:49:37,335 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-02 20:49:37,384 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-02 20:49:37,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 08:49:37 BoogieIcfgContainer [2022-11-02 20:49:37,401 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-02 20:49:37,402 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-02 20:49:37,402 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-02 20:49:37,402 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-02 20:49:37,403 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:49:36" (3/4) ... [2022-11-02 20:49:37,406 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-02 20:49:37,409 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-02 20:49:37,410 INFO L158 Benchmark]: Toolchain (without parser) took 2690.65ms. Allocated memory is still 98.6MB. Free memory was 63.7MB in the beginning and 44.7MB in the end (delta: 18.9MB). Peak memory consumption was 19.7MB. Max. memory is 16.1GB. [2022-11-02 20:49:37,412 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 77.6MB. Free memory was 51.8MB in the beginning and 51.8MB in the end (delta: 28.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:49:37,413 INFO L158 Benchmark]: CACSL2BoogieTranslator took 469.60ms. Allocated memory is still 98.6MB. Free memory was 63.5MB in the beginning and 66.2MB in the end (delta: -2.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-02 20:49:37,414 INFO L158 Benchmark]: Boogie Procedure Inliner took 125.97ms. Allocated memory is still 98.6MB. Free memory was 66.2MB in the beginning and 60.4MB in the end (delta: 5.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-02 20:49:37,415 INFO L158 Benchmark]: Boogie Preprocessor took 54.03ms. Allocated memory is still 98.6MB. Free memory was 60.4MB in the beginning and 56.7MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-02 20:49:37,421 INFO L158 Benchmark]: RCFGBuilder took 1168.26ms. Allocated memory is still 98.6MB. Free memory was 56.7MB in the beginning and 50.2MB in the end (delta: 6.6MB). Peak memory consumption was 28.7MB. Max. memory is 16.1GB. [2022-11-02 20:49:37,422 INFO L158 Benchmark]: TraceAbstraction took 854.65ms. Allocated memory is still 98.6MB. Free memory was 49.5MB in the beginning and 45.3MB in the end (delta: 4.2MB). Peak memory consumption was 6.2MB. Max. memory is 16.1GB. [2022-11-02 20:49:37,423 INFO L158 Benchmark]: Witness Printer took 7.08ms. Allocated memory is still 98.6MB. Free memory was 45.3MB in the beginning and 44.7MB in the end (delta: 536.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:49:37,433 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 77.6MB. Free memory was 51.8MB in the beginning and 51.8MB in the end (delta: 28.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 469.60ms. Allocated memory is still 98.6MB. Free memory was 63.5MB in the beginning and 66.2MB in the end (delta: -2.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 125.97ms. Allocated memory is still 98.6MB. Free memory was 66.2MB in the beginning and 60.4MB in the end (delta: 5.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 54.03ms. Allocated memory is still 98.6MB. Free memory was 60.4MB in the beginning and 56.7MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1168.26ms. Allocated memory is still 98.6MB. Free memory was 56.7MB in the beginning and 50.2MB in the end (delta: 6.6MB). Peak memory consumption was 28.7MB. Max. memory is 16.1GB. * TraceAbstraction took 854.65ms. Allocated memory is still 98.6MB. Free memory was 49.5MB in the beginning and 45.3MB in the end (delta: 4.2MB). Peak memory consumption was 6.2MB. Max. memory is 16.1GB. * Witness Printer took 7.08ms. Allocated memory is still 98.6MB. Free memory was 45.3MB in the beginning and 44.7MB in the end (delta: 536.2kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 164, overapproximation of bitwiseOr at line 162, overapproximation of bitwiseAnd at line 149. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 8); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (8 - 1); [L31] const SORT_10 mask_SORT_10 = (SORT_10)-1 >> (sizeof(SORT_10) * 8 - 32); [L32] const SORT_10 msb_SORT_10 = (SORT_10)1 << (32 - 1); [L34] const SORT_31 mask_SORT_31 = (SORT_31)-1 >> (sizeof(SORT_31) * 8 - 4); [L35] const SORT_31 msb_SORT_31 = (SORT_31)1 << (4 - 1); [L37] const SORT_67 mask_SORT_67 = (SORT_67)-1 >> (sizeof(SORT_67) * 8 - 10); [L38] const SORT_67 msb_SORT_67 = (SORT_67)1 << (10 - 1); [L40] const SORT_1 var_7 = 0; [L41] const SORT_10 var_12 = 0; [L42] const SORT_1 var_21 = 1; [L43] const SORT_67 var_68 = 0; [L44] const SORT_10 var_119 = 104; [L45] const SORT_10 var_136 = 1; [L47] SORT_1 input_2; [L48] SORT_3 input_4; [L49] SORT_1 input_5; [L50] SORT_1 input_6; [L51] SORT_1 input_29; [L52] SORT_31 input_32; [L53] SORT_31 input_34; [L54] SORT_1 input_36; [L55] SORT_1 input_38; [L56] SORT_1 input_44; [L57] SORT_1 input_46; [L58] SORT_1 input_48; [L59] SORT_3 input_52; [L60] SORT_1 input_55; [L61] SORT_1 input_63; [L62] SORT_1 input_73; [L63] SORT_1 input_79; [L64] SORT_1 input_81; [L65] SORT_1 input_95; [L66] SORT_1 input_101; [L67] SORT_1 input_107; [L68] SORT_1 input_113; [L69] SORT_1 input_114; [L70] SORT_1 input_115; [L71] SORT_67 input_134; [L72] SORT_1 input_143; [L73] SORT_1 input_144; [L74] SORT_1 input_145; [L76] SORT_1 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L77] SORT_1 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L78] SORT_1 state_25 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L79] SORT_1 state_27 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L80] SORT_1 state_40 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L81] SORT_1 state_42 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L82] SORT_1 state_50 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L83] SORT_1 state_57 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L84] SORT_1 state_59 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L85] SORT_1 state_61 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L86] SORT_1 state_65 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L87] SORT_67 state_69 = __VERIFIER_nondet_ushort() & mask_SORT_67; [L88] SORT_1 state_71 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L90] SORT_1 init_9_arg_1 = var_7; [L91] state_8 = init_9_arg_1 [L92] SORT_1 init_15_arg_1 = var_7; [L93] state_14 = init_15_arg_1 [L94] SORT_1 init_26_arg_1 = var_7; [L95] state_25 = init_26_arg_1 [L96] SORT_1 init_28_arg_1 = var_7; [L97] state_27 = init_28_arg_1 [L98] SORT_1 init_41_arg_1 = var_7; [L99] state_40 = init_41_arg_1 [L100] SORT_1 init_43_arg_1 = var_7; [L101] state_42 = init_43_arg_1 [L102] SORT_1 init_51_arg_1 = var_21; [L103] state_50 = init_51_arg_1 [L104] SORT_1 init_58_arg_1 = var_7; [L105] state_57 = init_58_arg_1 [L106] SORT_1 init_60_arg_1 = var_7; [L107] state_59 = init_60_arg_1 [L108] SORT_1 init_62_arg_1 = var_7; [L109] state_61 = init_62_arg_1 [L110] SORT_1 init_66_arg_1 = var_7; [L111] state_65 = init_66_arg_1 [L112] SORT_67 init_70_arg_1 = var_68; [L113] state_69 = init_70_arg_1 [L114] SORT_1 init_72_arg_1 = var_7; [L115] state_71 = init_72_arg_1 VAL [init_15_arg_1=0, init_26_arg_1=0, init_28_arg_1=0, init_41_arg_1=0, init_43_arg_1=0, init_51_arg_1=1, init_58_arg_1=0, init_60_arg_1=0, init_62_arg_1=0, init_66_arg_1=0, init_70_arg_1=0, init_72_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_10=4294967295, mask_SORT_3=255, mask_SORT_31=15, mask_SORT_67=1023, msb_SORT_1=1, msb_SORT_10=2147483648, msb_SORT_3=128, msb_SORT_31=8, msb_SORT_67=512, state_14=0, state_25=0, state_27=0, state_40=0, state_42=0, state_50=1, state_57=0, state_59=0, state_61=0, state_65=0, state_69=0, state_71=0, state_8=0, var_119=104, var_12=0, var_136=1, var_21=1, var_68=0, var_7=0] [L118] input_2 = __VERIFIER_nondet_uchar() [L119] input_4 = __VERIFIER_nondet_uchar() [L120] input_5 = __VERIFIER_nondet_uchar() [L121] input_6 = __VERIFIER_nondet_uchar() [L122] input_29 = __VERIFIER_nondet_uchar() [L123] input_32 = __VERIFIER_nondet_uchar() [L124] input_34 = __VERIFIER_nondet_uchar() [L125] input_36 = __VERIFIER_nondet_uchar() [L126] input_38 = __VERIFIER_nondet_uchar() [L127] input_44 = __VERIFIER_nondet_uchar() [L128] input_46 = __VERIFIER_nondet_uchar() [L129] input_48 = __VERIFIER_nondet_uchar() [L130] input_52 = __VERIFIER_nondet_uchar() [L131] input_55 = __VERIFIER_nondet_uchar() [L132] input_63 = __VERIFIER_nondet_uchar() [L133] input_73 = __VERIFIER_nondet_uchar() [L134] input_79 = __VERIFIER_nondet_uchar() [L135] input_81 = __VERIFIER_nondet_uchar() [L136] input_95 = __VERIFIER_nondet_uchar() [L137] input_101 = __VERIFIER_nondet_uchar() [L138] input_107 = __VERIFIER_nondet_uchar() [L139] input_113 = __VERIFIER_nondet_uchar() [L140] input_114 = __VERIFIER_nondet_uchar() [L141] input_115 = __VERIFIER_nondet_uchar() [L142] input_134 = __VERIFIER_nondet_ushort() [L143] input_143 = __VERIFIER_nondet_uchar() [L144] input_144 = __VERIFIER_nondet_uchar() [L145] input_145 = __VERIFIER_nondet_uchar() [L148] SORT_1 var_11_arg_0 = state_8; [L149] var_11_arg_0 = var_11_arg_0 & mask_SORT_1 [L150] SORT_10 var_11 = var_11_arg_0; [L151] SORT_10 var_13_arg_0 = var_11; [L152] SORT_10 var_13_arg_1 = var_12; [L153] SORT_1 var_13 = var_13_arg_0 == var_13_arg_1; [L154] SORT_1 var_16_arg_0 = state_14; [L155] var_16_arg_0 = var_16_arg_0 & mask_SORT_1 [L156] SORT_10 var_16 = var_16_arg_0; [L157] SORT_10 var_17_arg_0 = var_16; [L158] SORT_10 var_17_arg_1 = var_12; [L159] SORT_1 var_17 = var_17_arg_0 == var_17_arg_1; [L160] SORT_1 var_18_arg_0 = var_13; [L161] SORT_1 var_18_arg_1 = var_17; [L162] SORT_1 var_18 = var_18_arg_0 | var_18_arg_1; [L163] SORT_1 var_22_arg_0 = var_18; [L164] SORT_1 var_22 = ~var_22_arg_0; [L165] SORT_1 var_23_arg_0 = var_21; [L166] SORT_1 var_23_arg_1 = var_22; [L167] SORT_1 var_23 = var_23_arg_0 & var_23_arg_1; [L168] var_23 = var_23 & mask_SORT_1 [L169] SORT_1 bad_24_arg_0 = var_23; [L170] CALL __VERIFIER_assert(!(bad_24_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 87 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-02 20:49:37,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f949838c97095a42d5e6540bf73aedcc362763afd8b26091976cc471e7bc2aab --- 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-5e519f3 [2022-11-02 20:49:40,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:49:40,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:49:40,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:49:40,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:49:40,062 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:49:40,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:49:40,068 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:49:40,070 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:49:40,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:49:40,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:49:40,073 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:49:40,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:49:40,074 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:49:40,076 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:49:40,077 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:49:40,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:49:40,079 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:49:40,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:49:40,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:49:40,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:49:40,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:49:40,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:49:40,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:49:40,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:49:40,092 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:49:40,092 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:49:40,093 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:49:40,094 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:49:40,095 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:49:40,095 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:49:40,096 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:49:40,097 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:49:40,098 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:49:40,099 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:49:40,100 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:49:40,100 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:49:40,101 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:49:40,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:49:40,102 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:49:40,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:49:40,104 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-11-02 20:49:40,130 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:49:40,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:49:40,130 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:49:40,131 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:49:40,131 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:49:40,131 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:49:40,132 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:49:40,132 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:49:40,133 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:49:40,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:49:40,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:49:40,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:49:40,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:49:40,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:49:40,134 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 20:49:40,134 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-02 20:49:40,134 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-02 20:49:40,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:49:40,134 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:49:40,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:49:40,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:49:40,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:49:40,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:49:40,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:49:40,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:49:40,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:49:40,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:49:40,136 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-02 20:49:40,136 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-02 20:49:40,137 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:49:40,137 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:49:40,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:49:40,137 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-02 20:49:40,137 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f949838c97095a42d5e6540bf73aedcc362763afd8b26091976cc471e7bc2aab [2022-11-02 20:49:40,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:49:40,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:49:40,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:49:40,625 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:49:40,626 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:49:40,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c [2022-11-02 20:49:40,711 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/data/be293f276/d4cf93a2f0d74e24b217474e2db00890/FLAG9d65cb9b7 [2022-11-02 20:49:41,294 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:49:41,295 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c [2022-11-02 20:49:41,320 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/data/be293f276/d4cf93a2f0d74e24b217474e2db00890/FLAG9d65cb9b7 [2022-11-02 20:49:41,599 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/data/be293f276/d4cf93a2f0d74e24b217474e2db00890 [2022-11-02 20:49:41,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:49:41,603 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:49:41,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:49:41,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:49:41,609 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:49:41,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:49:41" (1/1) ... [2022-11-02 20:49:41,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2347fbe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:41, skipping insertion in model container [2022-11-02 20:49:41,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:49:41" (1/1) ... [2022-11-02 20:49:41,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:49:41,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:49:41,776 WARN L230 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_252b96d1-8eaa-4e68-bdbf-d474b6e06502/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c[1107,1120] [2022-11-02 20:49:41,937 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:49:41,942 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:49:41,961 WARN L230 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_252b96d1-8eaa-4e68-bdbf-d474b6e06502/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c[1107,1120] [2022-11-02 20:49:42,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:49:42,084 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:49:42,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:42 WrapperNode [2022-11-02 20:49:42,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:49:42,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:49:42,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:49:42,087 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:49:42,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:42" (1/1) ... [2022-11-02 20:49:42,109 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:42" (1/1) ... [2022-11-02 20:49:42,155 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 571 [2022-11-02 20:49:42,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:49:42,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:49:42,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:49:42,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:49:42,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:42" (1/1) ... [2022-11-02 20:49:42,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:42" (1/1) ... [2022-11-02 20:49:42,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:42" (1/1) ... [2022-11-02 20:49:42,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:42" (1/1) ... [2022-11-02 20:49:42,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:42" (1/1) ... [2022-11-02 20:49:42,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:42" (1/1) ... [2022-11-02 20:49:42,202 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:42" (1/1) ... [2022-11-02 20:49:42,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:42" (1/1) ... [2022-11-02 20:49:42,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:49:42,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:49:42,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:49:42,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:49:42,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:42" (1/1) ... [2022-11-02 20:49:42,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:49:42,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:42,280 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:49:42,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:49:42,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:49:42,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:49:42,580 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:49:42,582 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:49:43,291 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:49:43,304 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:49:43,304 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:49:43,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:49:43 BoogieIcfgContainer [2022-11-02 20:49:43,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:49:43,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:49:43,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:49:43,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:49:43,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:49:41" (1/3) ... [2022-11-02 20:49:43,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f52d621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:49:43, skipping insertion in model container [2022-11-02 20:49:43,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:42" (2/3) ... [2022-11-02 20:49:43,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f52d621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:49:43, skipping insertion in model container [2022-11-02 20:49:43,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:49:43" (3/3) ... [2022-11-02 20:49:43,322 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c [2022-11-02 20:49:43,344 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:49:43,345 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:49:43,447 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:49:43,458 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;@5b3681d5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:49:43,459 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:49:43,465 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 85 states have (on average 1.4941176470588236) internal successors, (127), 86 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:43,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-02 20:49:43,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:43,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-02 20:49:43,475 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:43,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:43,485 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-02 20:49:43,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:43,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037233429] [2022-11-02 20:49:43,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:43,505 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:43,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:43,510 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:43,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-02 20:49:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:43,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:49:43,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:43,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:43,924 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:49:43,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037233429] [2022-11-02 20:49:43,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037233429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:43,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:43,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:43,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888494289] [2022-11-02 20:49:43,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:43,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:43,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:49:43,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:43,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:43,971 INFO L87 Difference]: Start difference. First operand has 87 states, 85 states have (on average 1.4941176470588236) internal successors, (127), 86 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:44,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:44,197 INFO L93 Difference]: Finished difference Result 248 states and 372 transitions. [2022-11-02 20:49:44,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:49:44,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-02 20:49:44,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:44,229 INFO L225 Difference]: With dead ends: 248 [2022-11-02 20:49:44,235 INFO L226 Difference]: Without dead ends: 163 [2022-11-02 20:49:44,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:44,246 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 231 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:44,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 317 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:49:44,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-02 20:49:44,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 85. [2022-11-02 20:49:44,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 84 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:44,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 123 transitions. [2022-11-02 20:49:44,308 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 123 transitions. Word has length 5 [2022-11-02 20:49:44,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:44,308 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 123 transitions. [2022-11-02 20:49:44,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:44,309 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 123 transitions. [2022-11-02 20:49:44,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:49:44,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:44,312 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:49:44,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-02 20:49:44,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:49:44,519 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:44,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:44,520 INFO L85 PathProgramCache]: Analyzing trace with hash -345221643, now seen corresponding path program 1 times [2022-11-02 20:49:44,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:44,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2068498475] [2022-11-02 20:49:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:44,521 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:44,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:44,524 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:44,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-02 20:49:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:44,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:49:44,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:44,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:44,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:49:44,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2068498475] [2022-11-02 20:49:44,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2068498475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:44,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:44,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:44,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560309111] [2022-11-02 20:49:44,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:44,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:44,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:49:44,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:44,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:44,836 INFO L87 Difference]: Start difference. First operand 85 states and 123 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:44,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:44,883 INFO L93 Difference]: Finished difference Result 323 states and 474 transitions. [2022-11-02 20:49:44,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:49:44,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:49:44,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:44,886 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:49:44,886 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:49:44,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:44,889 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 332 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:44,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 465 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:49:44,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:49:44,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 91. [2022-11-02 20:49:44,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.4555555555555555) internal successors, (131), 90 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:44,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 131 transitions. [2022-11-02 20:49:44,900 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 131 transitions. Word has length 84 [2022-11-02 20:49:44,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:44,901 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 131 transitions. [2022-11-02 20:49:44,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:44,902 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 131 transitions. [2022-11-02 20:49:44,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:49:44,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:44,904 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:49:44,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:45,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:49:45,128 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:45,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:45,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1388882807, now seen corresponding path program 1 times [2022-11-02 20:49:45,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:45,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314271602] [2022-11-02 20:49:45,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:45,130 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:45,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:45,137 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:45,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-02 20:49:45,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:45,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:49:45,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:45,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:45,463 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:49:45,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314271602] [2022-11-02 20:49:45,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314271602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:45,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:45,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:45,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803995113] [2022-11-02 20:49:45,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:45,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:45,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:49:45,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:45,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:45,468 INFO L87 Difference]: Start difference. First operand 91 states and 131 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:45,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:45,509 INFO L93 Difference]: Finished difference Result 323 states and 473 transitions. [2022-11-02 20:49:45,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:49:45,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:49:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:45,512 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:49:45,512 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:49:45,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:45,514 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 321 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:45,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 461 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:49:45,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:49:45,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 95. [2022-11-02 20:49:45,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.446808510638298) internal successors, (136), 94 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:45,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2022-11-02 20:49:45,523 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 84 [2022-11-02 20:49:45,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:45,524 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2022-11-02 20:49:45,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:45,524 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2022-11-02 20:49:45,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:49:45,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:45,527 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:49:45,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:45,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:49:45,750 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:45,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:45,751 INFO L85 PathProgramCache]: Analyzing trace with hash 421532153, now seen corresponding path program 1 times [2022-11-02 20:49:45,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:45,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521355236] [2022-11-02 20:49:45,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:45,753 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:45,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:45,754 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:45,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-02 20:49:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:46,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:49:46,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:46,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:46,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:49:46,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521355236] [2022-11-02 20:49:46,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521355236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:46,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:46,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:46,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272772016] [2022-11-02 20:49:46,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:46,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:46,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:49:46,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:46,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:46,086 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:46,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:46,124 INFO L93 Difference]: Finished difference Result 323 states and 472 transitions. [2022-11-02 20:49:46,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:49:46,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:49:46,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:46,127 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:49:46,127 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:49:46,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:46,138 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 315 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:46,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 460 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:49:46,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:49:46,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 97. [2022-11-02 20:49:46,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.4375) internal successors, (138), 96 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:46,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 138 transitions. [2022-11-02 20:49:46,154 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 138 transitions. Word has length 84 [2022-11-02 20:49:46,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:46,156 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 138 transitions. [2022-11-02 20:49:46,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:46,157 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 138 transitions. [2022-11-02 20:49:46,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:49:46,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:46,159 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:49:46,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:46,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:49:46,372 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:46,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:46,373 INFO L85 PathProgramCache]: Analyzing trace with hash -71094021, now seen corresponding path program 1 times [2022-11-02 20:49:46,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:46,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146336544] [2022-11-02 20:49:46,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:46,374 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:46,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:46,375 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:46,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-02 20:49:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:46,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:49:46,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:46,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:46,692 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:49:46,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146336544] [2022-11-02 20:49:46,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146336544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:46,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:46,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:46,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55343751] [2022-11-02 20:49:46,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:46,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:46,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:49:46,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:46,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:46,701 INFO L87 Difference]: Start difference. First operand 97 states and 138 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:46,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:46,736 INFO L93 Difference]: Finished difference Result 323 states and 471 transitions. [2022-11-02 20:49:46,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:49:46,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:49:46,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:46,739 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:49:46,739 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:49:46,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:46,740 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 309 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:46,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 462 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:49:46,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:49:46,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 99. [2022-11-02 20:49:46,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.4285714285714286) internal successors, (140), 98 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:46,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 140 transitions. [2022-11-02 20:49:46,748 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 140 transitions. Word has length 84 [2022-11-02 20:49:46,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:46,749 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 140 transitions. [2022-11-02 20:49:46,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:46,750 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 140 transitions. [2022-11-02 20:49:46,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:49:46,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:46,751 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:49:46,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:46,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:49:46,965 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:46,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:46,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1287247747, now seen corresponding path program 1 times [2022-11-02 20:49:46,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:46,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669783696] [2022-11-02 20:49:46,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:46,967 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:46,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:46,968 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:46,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-02 20:49:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:47,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:49:47,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:47,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:47,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:47,285 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:49:47,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669783696] [2022-11-02 20:49:47,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669783696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:47,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:47,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:47,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459593571] [2022-11-02 20:49:47,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:47,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:47,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:49:47,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:47,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:47,288 INFO L87 Difference]: Start difference. First operand 99 states and 140 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:47,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:47,336 INFO L93 Difference]: Finished difference Result 323 states and 470 transitions. [2022-11-02 20:49:47,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:49:47,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:49:47,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:47,339 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:49:47,339 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:49:47,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:47,340 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 293 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:47,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 458 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:49:47,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:49:47,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 105. [2022-11-02 20:49:47,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.4230769230769231) internal successors, (148), 104 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:47,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 148 transitions. [2022-11-02 20:49:47,351 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 148 transitions. Word has length 84 [2022-11-02 20:49:47,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:47,351 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 148 transitions. [2022-11-02 20:49:47,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:47,352 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 148 transitions. [2022-11-02 20:49:47,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:49:47,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:47,357 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:49:47,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:47,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:49:47,563 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:47,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:47,563 INFO L85 PathProgramCache]: Analyzing trace with hash 674326911, now seen corresponding path program 1 times [2022-11-02 20:49:47,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:47,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [347982674] [2022-11-02 20:49:47,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:47,564 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:47,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:47,566 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:47,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-02 20:49:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:47,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:49:47,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:47,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:47,931 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:49:47,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [347982674] [2022-11-02 20:49:47,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [347982674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:47,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:47,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:47,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139677086] [2022-11-02 20:49:47,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:47,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:47,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:49:47,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:47,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:47,933 INFO L87 Difference]: Start difference. First operand 105 states and 148 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:47,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:47,964 INFO L93 Difference]: Finished difference Result 323 states and 469 transitions. [2022-11-02 20:49:47,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:49:47,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:49:47,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:47,966 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:49:47,966 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:49:47,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:47,968 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 287 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:47,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 460 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:49:47,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:49:47,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 107. [2022-11-02 20:49:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.4150943396226414) internal successors, (150), 106 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:47,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 150 transitions. [2022-11-02 20:49:47,974 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 150 transitions. Word has length 84 [2022-11-02 20:49:47,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:47,974 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 150 transitions. [2022-11-02 20:49:47,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:47,975 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 150 transitions. [2022-11-02 20:49:47,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:49:47,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:47,976 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:49:47,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:48,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:49:48,185 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:48,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:48,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1235026689, now seen corresponding path program 1 times [2022-11-02 20:49:48,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:48,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450231373] [2022-11-02 20:49:48,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:48,187 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:48,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:48,188 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:48,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-02 20:49:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:48,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:49:48,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:48,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:48,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:49:48,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450231373] [2022-11-02 20:49:48,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450231373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:48,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:48,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:48,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087182158] [2022-11-02 20:49:48,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:48,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:48,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:49:48,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:48,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:48,485 INFO L87 Difference]: Start difference. First operand 107 states and 150 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:48,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:48,515 INFO L93 Difference]: Finished difference Result 323 states and 468 transitions. [2022-11-02 20:49:48,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:49:48,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:49:48,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:48,517 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:49:48,517 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:49:48,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:48,518 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 281 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:48,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 459 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:49:48,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:49:48,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 109. [2022-11-02 20:49:48,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.4074074074074074) internal successors, (152), 108 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:48,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 152 transitions. [2022-11-02 20:49:48,523 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 152 transitions. Word has length 84 [2022-11-02 20:49:48,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:48,524 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 152 transitions. [2022-11-02 20:49:48,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:48,524 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 152 transitions. [2022-11-02 20:49:48,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:49:48,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:48,525 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:49:48,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:48,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:49:48,749 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:48,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:48,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1799023357, now seen corresponding path program 1 times [2022-11-02 20:49:48,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:48,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548279586] [2022-11-02 20:49:48,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:48,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:48,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:48,752 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:48,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-02 20:49:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:49,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:49:49,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:49,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:49,075 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:49:49,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548279586] [2022-11-02 20:49:49,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548279586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:49,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:49,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:49,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475752683] [2022-11-02 20:49:49,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:49,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:49,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:49:49,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:49,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:49,079 INFO L87 Difference]: Start difference. First operand 109 states and 152 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:49,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:49,116 INFO L93 Difference]: Finished difference Result 323 states and 467 transitions. [2022-11-02 20:49:49,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:49:49,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:49:49,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:49,118 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:49:49,119 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:49:49,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:49,121 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 270 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:49,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 455 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:49:49,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:49:49,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 113. [2022-11-02 20:49:49,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.4017857142857142) internal successors, (157), 112 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:49,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 157 transitions. [2022-11-02 20:49:49,127 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 157 transitions. Word has length 84 [2022-11-02 20:49:49,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:49,129 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 157 transitions. [2022-11-02 20:49:49,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:49,130 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 157 transitions. [2022-11-02 20:49:49,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:49:49,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:49,131 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:49:49,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:49,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:49:49,343 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:49,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:49,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1355122683, now seen corresponding path program 1 times [2022-11-02 20:49:49,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:49,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312660996] [2022-11-02 20:49:49,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:49,344 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:49,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:49,346 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:49,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-02 20:49:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:49,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:49:49,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:49,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:49,644 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:49:49,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312660996] [2022-11-02 20:49:49,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312660996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:49,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:49,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:49,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923617355] [2022-11-02 20:49:49,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:49,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:49,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:49:49,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:49,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:49,647 INFO L87 Difference]: Start difference. First operand 113 states and 157 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:49,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:49,698 INFO L93 Difference]: Finished difference Result 323 states and 466 transitions. [2022-11-02 20:49:49,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:49:49,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:49:49,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:49,700 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:49:49,701 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:49:49,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:49,702 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 264 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:49,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 454 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:49:49,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:49:49,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 115. [2022-11-02 20:49:49,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.394736842105263) internal successors, (159), 114 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:49,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 159 transitions. [2022-11-02 20:49:49,715 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 159 transitions. Word has length 84 [2022-11-02 20:49:49,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:49,715 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 159 transitions. [2022-11-02 20:49:49,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:49,716 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 159 transitions. [2022-11-02 20:49:49,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:49:49,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:49,721 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:49:49,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:49,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:49:49,936 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:49,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:49,936 INFO L85 PathProgramCache]: Analyzing trace with hash 911258503, now seen corresponding path program 1 times [2022-11-02 20:49:49,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:49,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224481028] [2022-11-02 20:49:49,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:49,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:49,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:49,939 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:49,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-02 20:49:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:50,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:49:50,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:50,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:50,234 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:49:50,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224481028] [2022-11-02 20:49:50,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224481028] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:50,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:50,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:50,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333830219] [2022-11-02 20:49:50,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:50,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:50,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:49:50,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:50,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:50,237 INFO L87 Difference]: Start difference. First operand 115 states and 159 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:50,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:50,289 INFO L93 Difference]: Finished difference Result 323 states and 465 transitions. [2022-11-02 20:49:50,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:49:50,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:49:50,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:50,291 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:49:50,291 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:49:50,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:50,292 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 253 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:50,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 441 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:49:50,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:49:50,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 119. [2022-11-02 20:49:50,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.3898305084745763) internal successors, (164), 118 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:50,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 164 transitions. [2022-11-02 20:49:50,298 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 164 transitions. Word has length 84 [2022-11-02 20:49:50,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:50,298 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 164 transitions. [2022-11-02 20:49:50,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:50,298 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 164 transitions. [2022-11-02 20:49:50,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:49:50,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:50,299 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:49:50,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-11-02 20:49:50,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:49:50,512 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:50,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:50,512 INFO L85 PathProgramCache]: Analyzing trace with hash 558170121, now seen corresponding path program 1 times [2022-11-02 20:49:50,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:50,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245926436] [2022-11-02 20:49:50,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:50,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:50,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:50,514 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:50,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-02 20:49:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:50,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:49:50,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:50,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:50,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:50,860 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:49:50,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245926436] [2022-11-02 20:49:50,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245926436] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:50,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:50,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:50,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539140339] [2022-11-02 20:49:50,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:50,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:50,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:49:50,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:50,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:50,863 INFO L87 Difference]: Start difference. First operand 119 states and 164 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:50,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:50,918 INFO L93 Difference]: Finished difference Result 323 states and 464 transitions. [2022-11-02 20:49:50,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:49:50,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:49:50,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:50,920 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:49:50,921 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:49:50,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:50,922 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 237 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:50,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 440 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:49:50,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:49:50,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 125. [2022-11-02 20:49:50,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.3870967741935485) internal successors, (172), 124 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:50,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 172 transitions. [2022-11-02 20:49:50,927 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 172 transitions. Word has length 84 [2022-11-02 20:49:50,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:50,927 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 172 transitions. [2022-11-02 20:49:50,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:50,928 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 172 transitions. [2022-11-02 20:49:50,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:49:50,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:50,929 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:49:50,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:51,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:49:51,142 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:51,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:51,142 INFO L85 PathProgramCache]: Analyzing trace with hash 981816843, now seen corresponding path program 1 times [2022-11-02 20:49:51,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:51,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652143879] [2022-11-02 20:49:51,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:51,143 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:51,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:51,144 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:51,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-02 20:49:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:51,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:49:51,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:51,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:51,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:51,580 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:49:51,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652143879] [2022-11-02 20:49:51,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652143879] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:51,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:51,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:51,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801373070] [2022-11-02 20:49:51,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:51,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:51,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:49:51,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:51,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:51,582 INFO L87 Difference]: Start difference. First operand 125 states and 172 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:51,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:51,672 INFO L93 Difference]: Finished difference Result 323 states and 463 transitions. [2022-11-02 20:49:51,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:49:51,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:49:51,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:51,674 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:49:51,674 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:49:51,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:51,675 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 231 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:51,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 415 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:49:51,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:49:51,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 127. [2022-11-02 20:49:51,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.380952380952381) internal successors, (174), 126 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:51,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 174 transitions. [2022-11-02 20:49:51,684 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 174 transitions. Word has length 84 [2022-11-02 20:49:51,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:51,684 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 174 transitions. [2022-11-02 20:49:51,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:51,685 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 174 transitions. [2022-11-02 20:49:51,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:49:51,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:51,686 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:49:51,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:51,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:49:51,899 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:51,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:51,899 INFO L85 PathProgramCache]: Analyzing trace with hash -863550323, now seen corresponding path program 1 times [2022-11-02 20:49:51,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:51,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842485357] [2022-11-02 20:49:51,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:51,900 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:51,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:51,901 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:51,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-02 20:49:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:52,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:49:52,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:52,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:52,454 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:49:52,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842485357] [2022-11-02 20:49:52,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842485357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:52,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:52,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:49:52,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780321816] [2022-11-02 20:49:52,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:52,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:49:52,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:49:52,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:49:52,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:52,456 INFO L87 Difference]: Start difference. First operand 127 states and 174 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:52,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:52,541 INFO L93 Difference]: Finished difference Result 368 states and 527 transitions. [2022-11-02 20:49:52,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:49:52,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:49:52,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:52,544 INFO L225 Difference]: With dead ends: 368 [2022-11-02 20:49:52,544 INFO L226 Difference]: Without dead ends: 287 [2022-11-02 20:49:52,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:49:52,545 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 407 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:52,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 668 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:49:52,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-02 20:49:52,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 129. [2022-11-02 20:49:52,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.375) internal successors, (176), 128 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:52,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 176 transitions. [2022-11-02 20:49:52,551 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 176 transitions. Word has length 84 [2022-11-02 20:49:52,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:52,552 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 176 transitions. [2022-11-02 20:49:52,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:52,552 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 176 transitions. [2022-11-02 20:49:52,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:49:52,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:52,553 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:49:52,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:52,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:49:52,768 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:52,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:52,769 INFO L85 PathProgramCache]: Analyzing trace with hash -204018801, now seen corresponding path program 1 times [2022-11-02 20:49:52,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:52,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313124902] [2022-11-02 20:49:52,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:52,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:52,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:52,770 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:52,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-02 20:49:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:53,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:49:53,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:53,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:53,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:53,111 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:49:53,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313124902] [2022-11-02 20:49:53,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313124902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:53,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:53,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:53,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465137793] [2022-11-02 20:49:53,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:53,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:53,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:49:53,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:53,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:53,114 INFO L87 Difference]: Start difference. First operand 129 states and 176 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:53,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:53,196 INFO L93 Difference]: Finished difference Result 323 states and 461 transitions. [2022-11-02 20:49:53,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:49:53,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:49:53,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:53,198 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:49:53,198 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:49:53,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:53,199 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 219 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:53,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 428 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:49:53,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:49:53,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 131. [2022-11-02 20:49:53,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.3692307692307693) internal successors, (178), 130 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:53,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 178 transitions. [2022-11-02 20:49:53,206 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 178 transitions. Word has length 84 [2022-11-02 20:49:53,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:53,206 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 178 transitions. [2022-11-02 20:49:53,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:53,206 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 178 transitions. [2022-11-02 20:49:53,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:49:53,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:53,208 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:49:53,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:53,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:49:53,427 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:53,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:53,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1048024303, now seen corresponding path program 1 times [2022-11-02 20:49:53,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:53,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89844737] [2022-11-02 20:49:53,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:53,428 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:53,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:53,429 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:53,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-02 20:49:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:53,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:49:53,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:53,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:53,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:53,978 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:49:53,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89844737] [2022-11-02 20:49:53,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89844737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:53,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:53,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:49:53,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146251933] [2022-11-02 20:49:53,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:53,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:49:53,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:49:53,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:49:53,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:53,981 INFO L87 Difference]: Start difference. First operand 131 states and 178 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:54,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:54,073 INFO L93 Difference]: Finished difference Result 368 states and 525 transitions. [2022-11-02 20:49:54,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:49:54,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:49:54,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:54,075 INFO L225 Difference]: With dead ends: 368 [2022-11-02 20:49:54,075 INFO L226 Difference]: Without dead ends: 287 [2022-11-02 20:49:54,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:49:54,076 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 393 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:54,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 660 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:49:54,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-02 20:49:54,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 133. [2022-11-02 20:49:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.3636363636363635) internal successors, (180), 132 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 180 transitions. [2022-11-02 20:49:54,081 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 180 transitions. Word has length 84 [2022-11-02 20:49:54,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:54,081 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 180 transitions. [2022-11-02 20:49:54,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:54,082 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 180 transitions. [2022-11-02 20:49:54,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:49:54,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:54,084 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:49:54,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:54,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:49:54,299 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:54,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:54,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1120410861, now seen corresponding path program 1 times [2022-11-02 20:49:54,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:54,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218195931] [2022-11-02 20:49:54,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:54,301 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:54,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:54,302 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:54,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-02 20:49:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:54,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:49:54,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:54,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:54,615 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:49:54,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218195931] [2022-11-02 20:49:54,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [218195931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:54,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:54,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:54,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113136840] [2022-11-02 20:49:54,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:54,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:54,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:49:54,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:54,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:54,617 INFO L87 Difference]: Start difference. First operand 133 states and 180 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:54,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:54,698 INFO L93 Difference]: Finished difference Result 323 states and 459 transitions. [2022-11-02 20:49:54,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:49:54,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:49:54,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:54,701 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:49:54,701 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:49:54,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:54,702 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 202 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:54,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 426 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:49:54,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:49:54,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 137. [2022-11-02 20:49:54,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.3602941176470589) internal successors, (185), 136 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:54,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 185 transitions. [2022-11-02 20:49:54,708 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 185 transitions. Word has length 84 [2022-11-02 20:49:54,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:54,708 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 185 transitions. [2022-11-02 20:49:54,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:54,709 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 185 transitions. [2022-11-02 20:49:54,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:49:54,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:54,710 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:49:54,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:54,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:49:54,923 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:54,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:54,924 INFO L85 PathProgramCache]: Analyzing trace with hash 265792533, now seen corresponding path program 1 times [2022-11-02 20:49:54,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:54,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239732098] [2022-11-02 20:49:54,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:54,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:54,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:54,925 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:54,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-02 20:49:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:55,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:49:55,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:55,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:55,269 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:49:55,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239732098] [2022-11-02 20:49:55,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239732098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:55,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:55,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:55,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326500820] [2022-11-02 20:49:55,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:55,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:55,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:49:55,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:55,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:55,274 INFO L87 Difference]: Start difference. First operand 137 states and 185 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:55,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:55,322 INFO L93 Difference]: Finished difference Result 323 states and 458 transitions. [2022-11-02 20:49:55,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:49:55,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:49:55,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:55,323 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:49:55,323 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:49:55,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:55,325 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 196 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:55,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 434 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:49:55,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:49:55,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 139. [2022-11-02 20:49:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.355072463768116) internal successors, (187), 138 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:55,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 187 transitions. [2022-11-02 20:49:55,330 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 187 transitions. Word has length 84 [2022-11-02 20:49:55,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:55,330 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 187 transitions. [2022-11-02 20:49:55,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:55,331 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 187 transitions. [2022-11-02 20:49:55,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:49:55,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:55,332 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:49:55,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:55,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:49:55,547 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:55,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:55,547 INFO L85 PathProgramCache]: Analyzing trace with hash -2105946729, now seen corresponding path program 1 times [2022-11-02 20:49:55,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:55,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389295972] [2022-11-02 20:49:55,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:55,548 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:55,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:55,549 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:55,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-02 20:49:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:55,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:49:55,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:55,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:55,880 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:49:55,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389295972] [2022-11-02 20:49:55,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389295972] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:55,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:55,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:55,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888546966] [2022-11-02 20:49:55,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:55,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:55,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:49:55,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:55,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:55,883 INFO L87 Difference]: Start difference. First operand 139 states and 187 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:55,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:55,916 INFO L93 Difference]: Finished difference Result 323 states and 457 transitions. [2022-11-02 20:49:55,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:49:55,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:49:55,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:55,918 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:49:55,919 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:49:55,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:55,920 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 190 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:55,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 448 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:49:55,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:49:55,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 141. [2022-11-02 20:49:55,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.35) internal successors, (189), 140 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:55,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 189 transitions. [2022-11-02 20:49:55,926 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 189 transitions. Word has length 84 [2022-11-02 20:49:55,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:55,926 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 189 transitions. [2022-11-02 20:49:55,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:55,927 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 189 transitions. [2022-11-02 20:49:55,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:49:55,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:55,928 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:49:55,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:56,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:49:56,143 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:56,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:56,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1965398119, now seen corresponding path program 1 times [2022-11-02 20:49:56,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:56,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128081948] [2022-11-02 20:49:56,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:56,144 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:56,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:56,146 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:56,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-02 20:49:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:56,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:49:56,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:56,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:56,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:56,471 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:49:56,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128081948] [2022-11-02 20:49:56,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128081948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:56,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:56,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:56,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236985622] [2022-11-02 20:49:56,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:56,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:56,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:49:56,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:56,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:56,473 INFO L87 Difference]: Start difference. First operand 141 states and 189 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:56,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:56,505 INFO L93 Difference]: Finished difference Result 323 states and 456 transitions. [2022-11-02 20:49:56,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:49:56,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:49:56,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:56,507 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:49:56,507 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:49:56,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:56,511 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 184 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:56,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 444 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:49:56,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:49:56,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 143. [2022-11-02 20:49:56,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.3450704225352113) internal successors, (191), 142 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:56,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 191 transitions. [2022-11-02 20:49:56,520 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 191 transitions. Word has length 84 [2022-11-02 20:49:56,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:56,520 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 191 transitions. [2022-11-02 20:49:56,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:56,520 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 191 transitions. [2022-11-02 20:49:56,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:49:56,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:56,521 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:49:56,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:56,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:49:56,735 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:56,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:56,735 INFO L85 PathProgramCache]: Analyzing trace with hash 524130843, now seen corresponding path program 1 times [2022-11-02 20:49:56,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:56,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665342276] [2022-11-02 20:49:56,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:56,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:56,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:56,738 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:56,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-02 20:49:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:56,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:49:56,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:57,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:57,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:57,392 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:49:57,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665342276] [2022-11-02 20:49:57,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665342276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:57,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:57,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:49:57,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947410812] [2022-11-02 20:49:57,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:57,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:49:57,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:49:57,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:49:57,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:57,396 INFO L87 Difference]: Start difference. First operand 143 states and 191 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:57,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:57,490 INFO L93 Difference]: Finished difference Result 368 states and 520 transitions. [2022-11-02 20:49:57,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:49:57,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:49:57,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:57,492 INFO L225 Difference]: With dead ends: 368 [2022-11-02 20:49:57,494 INFO L226 Difference]: Without dead ends: 287 [2022-11-02 20:49:57,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:49:57,495 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 353 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:57,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 638 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:49:57,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-02 20:49:57,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 145. [2022-11-02 20:49:57,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.3402777777777777) internal successors, (193), 144 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:57,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 193 transitions. [2022-11-02 20:49:57,503 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 193 transitions. Word has length 84 [2022-11-02 20:49:57,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:57,503 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 193 transitions. [2022-11-02 20:49:57,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:57,504 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 193 transitions. [2022-11-02 20:49:57,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:49:57,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:57,505 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:49:57,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:57,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:49:57,717 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:57,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:57,718 INFO L85 PathProgramCache]: Analyzing trace with hash 946832669, now seen corresponding path program 1 times [2022-11-02 20:49:57,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:57,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837745778] [2022-11-02 20:49:57,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:57,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:57,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:57,720 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:57,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-02 20:49:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:57,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:49:57,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:58,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:58,039 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:49:58,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837745778] [2022-11-02 20:49:58,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837745778] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:58,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:58,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:58,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937090166] [2022-11-02 20:49:58,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:58,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:58,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:49:58,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:58,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:58,041 INFO L87 Difference]: Start difference. First operand 145 states and 193 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:58,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:58,120 INFO L93 Difference]: Finished difference Result 323 states and 454 transitions. [2022-11-02 20:49:58,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:49:58,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:49:58,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:58,127 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:49:58,127 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:49:58,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:58,128 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 172 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:58,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 421 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:49:58,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:49:58,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 147. [2022-11-02 20:49:58,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.3356164383561644) internal successors, (195), 146 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:58,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 195 transitions. [2022-11-02 20:49:58,134 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 195 transitions. Word has length 84 [2022-11-02 20:49:58,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:58,134 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 195 transitions. [2022-11-02 20:49:58,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:58,145 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 195 transitions. [2022-11-02 20:49:58,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:49:58,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:58,146 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:49:58,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:58,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:49:58,361 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:58,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:58,361 INFO L85 PathProgramCache]: Analyzing trace with hash -742111073, now seen corresponding path program 1 times [2022-11-02 20:49:58,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:58,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668807744] [2022-11-02 20:49:58,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:58,362 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:58,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:58,363 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:58,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-02 20:49:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:58,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:49:58,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:58,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:58,659 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:49:58,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668807744] [2022-11-02 20:49:58,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668807744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:58,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:58,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:58,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605773604] [2022-11-02 20:49:58,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:58,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:58,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:49:58,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:58,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:58,661 INFO L87 Difference]: Start difference. First operand 147 states and 195 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:58,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:58,730 INFO L93 Difference]: Finished difference Result 323 states and 453 transitions. [2022-11-02 20:49:58,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:49:58,730 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:49:58,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:58,731 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:49:58,732 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:49:58,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:58,732 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 166 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:58,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 420 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:49:58,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:49:58,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 149. [2022-11-02 20:49:58,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.3310810810810811) internal successors, (197), 148 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:58,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 197 transitions. [2022-11-02 20:49:58,740 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 197 transitions. Word has length 84 [2022-11-02 20:49:58,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:58,740 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 197 transitions. [2022-11-02 20:49:58,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:58,740 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 197 transitions. [2022-11-02 20:49:58,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:49:58,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:58,741 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:49:58,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:58,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:49:58,942 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:58,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:58,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1964508321, now seen corresponding path program 1 times [2022-11-02 20:49:58,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:58,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613532836] [2022-11-02 20:49:58,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:58,943 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:58,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:58,944 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:58,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-02 20:49:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:59,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:49:59,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:59,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:59,420 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:49:59,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613532836] [2022-11-02 20:49:59,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613532836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:59,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:59,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:59,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921916644] [2022-11-02 20:49:59,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:59,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:59,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:49:59,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:59,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:59,423 INFO L87 Difference]: Start difference. First operand 149 states and 197 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:59,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:59,529 INFO L93 Difference]: Finished difference Result 323 states and 452 transitions. [2022-11-02 20:49:59,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:49:59,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:49:59,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:59,531 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:49:59,532 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:49:59,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:59,533 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 160 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:59,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 404 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:49:59,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:49:59,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 151. [2022-11-02 20:49:59,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.3266666666666667) internal successors, (199), 150 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:59,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 199 transitions. [2022-11-02 20:49:59,540 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 199 transitions. Word has length 84 [2022-11-02 20:49:59,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:59,540 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 199 transitions. [2022-11-02 20:49:59,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:59,541 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 199 transitions. [2022-11-02 20:49:59,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:49:59,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:59,542 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:49:59,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:59,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:49:59,757 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:59,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:59,758 INFO L85 PathProgramCache]: Analyzing trace with hash 684644643, now seen corresponding path program 1 times [2022-11-02 20:49:59,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:49:59,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543865492] [2022-11-02 20:49:59,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:59,759 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:49:59,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:49:59,760 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:49:59,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-02 20:49:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:59,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:49:59,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:00,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:50:00,075 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:50:00,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543865492] [2022-11-02 20:50:00,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543865492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:00,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:00,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:50:00,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351427960] [2022-11-02 20:50:00,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:00,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:50:00,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:50:00,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:50:00,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:50:00,077 INFO L87 Difference]: Start difference. First operand 151 states and 199 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:00,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:00,141 INFO L93 Difference]: Finished difference Result 323 states and 451 transitions. [2022-11-02 20:50:00,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:50:00,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:50:00,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:00,142 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:50:00,143 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:50:00,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:50:00,143 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 149 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:00,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 418 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:50:00,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:50:00,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 155. [2022-11-02 20:50:00,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.3246753246753247) internal successors, (204), 154 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:00,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 204 transitions. [2022-11-02 20:50:00,149 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 204 transitions. Word has length 84 [2022-11-02 20:50:00,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:00,149 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 204 transitions. [2022-11-02 20:50:00,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:00,150 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 204 transitions. [2022-11-02 20:50:00,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:50:00,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:00,151 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:50:00,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:00,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:50:00,351 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:00,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:00,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1385709221, now seen corresponding path program 1 times [2022-11-02 20:50:00,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:50:00,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [161519839] [2022-11-02 20:50:00,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:00,353 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:50:00,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:50:00,354 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:50:00,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-02 20:50:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:00,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:50:00,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:00,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:50:00,930 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:50:00,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [161519839] [2022-11-02 20:50:00,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [161519839] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:00,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:00,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:50:00,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928154312] [2022-11-02 20:50:00,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:00,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:50:00,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:50:00,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:50:00,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:50:00,933 INFO L87 Difference]: Start difference. First operand 155 states and 204 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:01,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:01,017 INFO L93 Difference]: Finished difference Result 368 states and 515 transitions. [2022-11-02 20:50:01,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:50:01,017 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:50:01,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:01,019 INFO L225 Difference]: With dead ends: 368 [2022-11-02 20:50:01,019 INFO L226 Difference]: Without dead ends: 287 [2022-11-02 20:50:01,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:50:01,020 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 313 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:01,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 615 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:50:01,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-02 20:50:01,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 157. [2022-11-02 20:50:01,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.3205128205128205) internal successors, (206), 156 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:01,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 206 transitions. [2022-11-02 20:50:01,025 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 206 transitions. Word has length 84 [2022-11-02 20:50:01,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:01,025 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 206 transitions. [2022-11-02 20:50:01,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:01,026 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 206 transitions. [2022-11-02 20:50:01,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:50:01,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:01,027 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:50:01,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-02 20:50:01,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:50:01,240 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:01,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:01,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2065767591, now seen corresponding path program 1 times [2022-11-02 20:50:01,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:50:01,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330567596] [2022-11-02 20:50:01,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:01,241 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:50:01,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:50:01,242 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:50:01,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-02 20:50:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:01,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:50:01,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:01,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:50:01,551 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:50:01,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330567596] [2022-11-02 20:50:01,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330567596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:01,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:01,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:50:01,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610995744] [2022-11-02 20:50:01,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:01,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:50:01,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:50:01,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:50:01,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:50:01,553 INFO L87 Difference]: Start difference. First operand 157 states and 206 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:01,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:01,617 INFO L93 Difference]: Finished difference Result 323 states and 449 transitions. [2022-11-02 20:50:01,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:50:01,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:50:01,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:01,620 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:50:01,620 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:50:01,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:50:01,621 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 137 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:01,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 416 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:50:01,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:50:01,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 159. [2022-11-02 20:50:01,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.3164556962025316) internal successors, (208), 158 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:01,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 208 transitions. [2022-11-02 20:50:01,627 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 208 transitions. Word has length 84 [2022-11-02 20:50:01,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:01,627 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 208 transitions. [2022-11-02 20:50:01,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:01,628 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 208 transitions. [2022-11-02 20:50:01,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:50:01,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:01,629 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:50:01,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:01,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:50:01,843 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:01,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:01,844 INFO L85 PathProgramCache]: Analyzing trace with hash -454192343, now seen corresponding path program 1 times [2022-11-02 20:50:01,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:50:01,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [607682283] [2022-11-02 20:50:01,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:01,844 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:50:01,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:50:01,845 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:50:01,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-02 20:50:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:02,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:50:02,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:02,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:50:02,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:50:02,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [607682283] [2022-11-02 20:50:02,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [607682283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:02,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:02,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:50:02,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314196619] [2022-11-02 20:50:02,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:02,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:50:02,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:50:02,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:50:02,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:50:02,165 INFO L87 Difference]: Start difference. First operand 159 states and 208 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:02,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:02,232 INFO L93 Difference]: Finished difference Result 323 states and 448 transitions. [2022-11-02 20:50:02,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:50:02,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:50:02,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:02,236 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:50:02,236 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:50:02,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:50:02,239 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 131 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:02,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 415 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:50:02,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:50:02,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 161. [2022-11-02 20:50:02,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.3125) internal successors, (210), 160 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:02,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 210 transitions. [2022-11-02 20:50:02,248 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 210 transitions. Word has length 84 [2022-11-02 20:50:02,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:02,249 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 210 transitions. [2022-11-02 20:50:02,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:02,249 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 210 transitions. [2022-11-02 20:50:02,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:50:02,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:02,250 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:50:02,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:02,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:50:02,463 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:02,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:02,463 INFO L85 PathProgramCache]: Analyzing trace with hash -452345301, now seen corresponding path program 1 times [2022-11-02 20:50:02,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:50:02,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [201388560] [2022-11-02 20:50:02,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:02,464 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:50:02,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:50:02,464 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:50:02,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-02 20:50:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:02,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-02 20:50:02,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:50:03,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:50:05,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:50:05,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [201388560] [2022-11-02 20:50:05,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [201388560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:05,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:50:05,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-02 20:50:05,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945243886] [2022-11-02 20:50:05,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:05,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:50:05,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:50:05,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:50:05,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:50:05,158 INFO L87 Difference]: Start difference. First operand 161 states and 210 transitions. Second operand has 18 states, 18 states have (on average 9.222222222222221) internal successors, (166), 18 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:06,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:06,052 INFO L93 Difference]: Finished difference Result 386 states and 541 transitions. [2022-11-02 20:50:06,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:50:06,053 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.222222222222221) internal successors, (166), 18 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:50:06,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:06,055 INFO L225 Difference]: With dead ends: 386 [2022-11-02 20:50:06,055 INFO L226 Difference]: Without dead ends: 384 [2022-11-02 20:50:06,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:50:06,056 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 1128 mSDsluCounter, 2012 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 2181 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:06,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1128 Valid, 2181 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 255 Invalid, 0 Unknown, 377 Unchecked, 0.4s Time] [2022-11-02 20:50:06,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-11-02 20:50:06,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 240. [2022-11-02 20:50:06,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.3682008368200838) internal successors, (327), 239 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:06,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 327 transitions. [2022-11-02 20:50:06,065 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 327 transitions. Word has length 84 [2022-11-02 20:50:06,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:06,066 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 327 transitions. [2022-11-02 20:50:06,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.222222222222221) internal successors, (166), 18 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:06,066 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 327 transitions. [2022-11-02 20:50:06,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-02 20:50:06,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:06,068 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:06,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:06,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:50:06,281 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:06,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:06,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1964626963, now seen corresponding path program 1 times [2022-11-02 20:50:06,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:50:06,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768747958] [2022-11-02 20:50:06,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:06,283 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:50:06,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:50:06,284 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:50:06,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-02 20:50:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:06,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:50:06,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:07,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:07,282 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:50:07,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768747958] [2022-11-02 20:50:07,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768747958] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:07,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:50:07,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-11-02 20:50:07,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536084527] [2022-11-02 20:50:07,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:07,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:50:07,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:50:07,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:50:07,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:50:07,284 INFO L87 Difference]: Start difference. First operand 240 states and 327 transitions. Second operand has 10 states, 10 states have (on average 24.3) internal successors, (243), 10 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:07,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:07,682 INFO L93 Difference]: Finished difference Result 740 states and 1057 transitions. [2022-11-02 20:50:07,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:50:07,682 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 24.3) internal successors, (243), 10 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2022-11-02 20:50:07,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:07,684 INFO L225 Difference]: With dead ends: 740 [2022-11-02 20:50:07,685 INFO L226 Difference]: Without dead ends: 580 [2022-11-02 20:50:07,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:50:07,687 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 754 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:07,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 764 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:50:07,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-11-02 20:50:07,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 258. [2022-11-02 20:50:07,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 1.3618677042801557) internal successors, (350), 257 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 350 transitions. [2022-11-02 20:50:07,702 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 350 transitions. Word has length 163 [2022-11-02 20:50:07,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:07,702 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 350 transitions. [2022-11-02 20:50:07,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.3) internal successors, (243), 10 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:07,703 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 350 transitions. [2022-11-02 20:50:07,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-02 20:50:07,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:07,704 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:07,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:07,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:50:07,919 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:07,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:07,920 INFO L85 PathProgramCache]: Analyzing trace with hash -596235883, now seen corresponding path program 1 times [2022-11-02 20:50:07,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:50:07,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043880833] [2022-11-02 20:50:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:07,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:50:07,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:50:07,922 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:50:07,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-02 20:50:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:08,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:50:08,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:08,583 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:08,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 82 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:08,916 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:50:08,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043880833] [2022-11-02 20:50:08,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043880833] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:08,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:50:08,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-11-02 20:50:08,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885632389] [2022-11-02 20:50:08,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:08,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:50:08,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:50:08,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:50:08,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:50:08,918 INFO L87 Difference]: Start difference. First operand 258 states and 350 transitions. Second operand has 19 states, 19 states have (on average 10.894736842105264) internal successors, (207), 19 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:10,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:10,050 INFO L93 Difference]: Finished difference Result 1558 states and 2211 transitions. [2022-11-02 20:50:10,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:50:10,050 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 10.894736842105264) internal successors, (207), 19 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2022-11-02 20:50:10,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:10,055 INFO L225 Difference]: With dead ends: 1558 [2022-11-02 20:50:10,055 INFO L226 Difference]: Without dead ends: 1380 [2022-11-02 20:50:10,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2022-11-02 20:50:10,057 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 1969 mSDsluCounter, 2504 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1969 SdHoareTripleChecker+Valid, 2660 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:10,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1969 Valid, 2660 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:50:10,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2022-11-02 20:50:10,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 474. [2022-11-02 20:50:10,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 1.372093023255814) internal successors, (649), 473 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:10,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 649 transitions. [2022-11-02 20:50:10,081 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 649 transitions. Word has length 163 [2022-11-02 20:50:10,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:10,082 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 649 transitions. [2022-11-02 20:50:10,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.894736842105264) internal successors, (207), 19 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:10,082 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 649 transitions. [2022-11-02 20:50:10,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-02 20:50:10,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:10,084 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:10,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:10,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:50:10,298 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:10,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:10,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1563586537, now seen corresponding path program 1 times [2022-11-02 20:50:10,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:50:10,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1559534500] [2022-11-02 20:50:10,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:10,299 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:50:10,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:50:10,300 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:50:10,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-02 20:50:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:10,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:50:10,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 69 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:10,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 82 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:11,239 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:50:11,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1559534500] [2022-11-02 20:50:11,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1559534500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:11,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:50:11,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-11-02 20:50:11,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437344702] [2022-11-02 20:50:11,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:11,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:50:11,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:50:11,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:50:11,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:50:11,243 INFO L87 Difference]: Start difference. First operand 474 states and 649 transitions. Second operand has 19 states, 19 states have (on average 10.894736842105264) internal successors, (207), 19 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:12,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:12,350 INFO L93 Difference]: Finished difference Result 1722 states and 2447 transitions. [2022-11-02 20:50:12,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:50:12,350 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 10.894736842105264) internal successors, (207), 19 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2022-11-02 20:50:12,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:12,356 INFO L225 Difference]: With dead ends: 1722 [2022-11-02 20:50:12,356 INFO L226 Difference]: Without dead ends: 1368 [2022-11-02 20:50:12,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2022-11-02 20:50:12,358 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 1959 mSDsluCounter, 2620 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1959 SdHoareTripleChecker+Valid, 2777 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:12,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1959 Valid, 2777 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:50:12,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2022-11-02 20:50:12,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 474. [2022-11-02 20:50:12,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 1.3678646934460887) internal successors, (647), 473 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:12,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 647 transitions. [2022-11-02 20:50:12,387 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 647 transitions. Word has length 163 [2022-11-02 20:50:12,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:12,387 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 647 transitions. [2022-11-02 20:50:12,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.894736842105264) internal successors, (207), 19 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:12,388 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 647 transitions. [2022-11-02 20:50:12,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-02 20:50:12,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:12,390 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:12,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:12,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:50:12,605 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:12,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:12,606 INFO L85 PathProgramCache]: Analyzing trace with hash -2056212711, now seen corresponding path program 1 times [2022-11-02 20:50:12,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:50:12,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323453332] [2022-11-02 20:50:12,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:12,607 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:50:12,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:50:12,608 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:50:12,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-02 20:50:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:12,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:50:12,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 67 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:13,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 67 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:13,471 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:50:13,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323453332] [2022-11-02 20:50:13,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323453332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:13,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:50:13,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-11-02 20:50:13,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170377030] [2022-11-02 20:50:13,472 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:13,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:50:13,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:50:13,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:50:13,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:50:13,474 INFO L87 Difference]: Start difference. First operand 474 states and 647 transitions. Second operand has 10 states, 10 states have (on average 24.3) internal successors, (243), 10 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:13,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:13,894 INFO L93 Difference]: Finished difference Result 1134 states and 1605 transitions. [2022-11-02 20:50:13,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:50:13,894 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 24.3) internal successors, (243), 10 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2022-11-02 20:50:13,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:13,897 INFO L225 Difference]: With dead ends: 1134 [2022-11-02 20:50:13,898 INFO L226 Difference]: Without dead ends: 956 [2022-11-02 20:50:13,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:50:13,899 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 1014 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1014 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:13,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1014 Valid, 868 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:50:13,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-11-02 20:50:13,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 506. [2022-11-02 20:50:13,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 1.3603960396039605) internal successors, (687), 505 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:13,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 687 transitions. [2022-11-02 20:50:13,917 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 687 transitions. Word has length 163 [2022-11-02 20:50:13,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:13,918 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 687 transitions. [2022-11-02 20:50:13,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.3) internal successors, (243), 10 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:13,920 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 687 transitions. [2022-11-02 20:50:13,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-02 20:50:13,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:13,921 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:13,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:14,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:50:14,136 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:14,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:14,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1022600859, now seen corresponding path program 1 times [2022-11-02 20:50:14,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:50:14,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192295511] [2022-11-02 20:50:14,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:14,138 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:50:14,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:50:14,139 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:50:14,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-02 20:50:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:14,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:50:14,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 61 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:14,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 82 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:14,955 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:50:14,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192295511] [2022-11-02 20:50:14,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192295511] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:14,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:50:14,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-02 20:50:14,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212603452] [2022-11-02 20:50:14,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:14,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:50:14,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:50:14,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:50:14,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:50:14,958 INFO L87 Difference]: Start difference. First operand 506 states and 687 transitions. Second operand has 11 states, 11 states have (on average 20.09090909090909) internal successors, (221), 11 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:15,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:15,335 INFO L93 Difference]: Finished difference Result 1726 states and 2437 transitions. [2022-11-02 20:50:15,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:50:15,335 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 20.09090909090909) internal successors, (221), 11 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2022-11-02 20:50:15,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:15,341 INFO L225 Difference]: With dead ends: 1726 [2022-11-02 20:50:15,342 INFO L226 Difference]: Without dead ends: 1532 [2022-11-02 20:50:15,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:50:15,343 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 965 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 1377 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:15,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [965 Valid, 1377 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:50:15,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2022-11-02 20:50:15,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 890. [2022-11-02 20:50:15,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 1.3892013498312712) internal successors, (1235), 889 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:15,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1235 transitions. [2022-11-02 20:50:15,409 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1235 transitions. Word has length 163 [2022-11-02 20:50:15,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:15,410 INFO L495 AbstractCegarLoop]: Abstraction has 890 states and 1235 transitions. [2022-11-02 20:50:15,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.09090909090909) internal successors, (221), 11 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:15,411 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1235 transitions. [2022-11-02 20:50:15,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-02 20:50:15,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:15,415 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:15,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:15,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:50:15,633 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:15,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:15,633 INFO L85 PathProgramCache]: Analyzing trace with hash -272536479, now seen corresponding path program 2 times [2022-11-02 20:50:15,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:50:15,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030939226] [2022-11-02 20:50:15,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:50:15,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:50:15,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:50:15,635 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:50:15,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-02 20:50:16,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:50:16,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:50:16,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:50:16,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 26 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-02 20:50:16,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-02 20:50:16,596 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:50:16,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030939226] [2022-11-02 20:50:16,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030939226] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:16,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:50:16,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-02 20:50:16,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871993501] [2022-11-02 20:50:16,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:16,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:50:16,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:50:16,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:50:16,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:50:16,599 INFO L87 Difference]: Start difference. First operand 890 states and 1235 transitions. Second operand has 11 states, 11 states have (on average 22.545454545454547) internal successors, (248), 11 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:17,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:17,011 INFO L93 Difference]: Finished difference Result 4202 states and 5975 transitions. [2022-11-02 20:50:17,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:50:17,012 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 22.545454545454547) internal successors, (248), 11 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2022-11-02 20:50:17,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:17,021 INFO L225 Difference]: With dead ends: 4202 [2022-11-02 20:50:17,021 INFO L226 Difference]: Without dead ends: 3432 [2022-11-02 20:50:17,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:50:17,023 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 1040 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1040 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:17,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1040 Valid, 1033 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:50:17,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3432 states. [2022-11-02 20:50:17,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3432 to 1658. [2022-11-02 20:50:17,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 1.404345202172601) internal successors, (2327), 1657 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:17,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2327 transitions. [2022-11-02 20:50:17,099 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2327 transitions. Word has length 242 [2022-11-02 20:50:17,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:17,100 INFO L495 AbstractCegarLoop]: Abstraction has 1658 states and 2327 transitions. [2022-11-02 20:50:17,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 22.545454545454547) internal successors, (248), 11 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:17,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2327 transitions. [2022-11-02 20:50:17,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-02 20:50:17,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:17,103 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:17,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:17,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:50:17,321 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:17,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:17,321 INFO L85 PathProgramCache]: Analyzing trace with hash 145352223, now seen corresponding path program 3 times [2022-11-02 20:50:17,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:50:17,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298642859] [2022-11-02 20:50:17,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:50:17,322 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:50:17,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:50:17,324 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:50:17,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-02 20:50:17,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:50:17,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:50:17,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:50:17,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 144 proven. 6 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-02 20:50:18,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 144 proven. 6 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-02 20:50:18,603 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:50:18,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298642859] [2022-11-02 20:50:18,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298642859] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:18,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:50:18,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-11-02 20:50:18,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638148308] [2022-11-02 20:50:18,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:18,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:50:18,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:50:18,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:50:18,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:50:18,606 INFO L87 Difference]: Start difference. First operand 1658 states and 2327 transitions. Second operand has 9 states, 9 states have (on average 31.333333333333332) internal successors, (282), 9 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:18,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:18,919 INFO L93 Difference]: Finished difference Result 4858 states and 6832 transitions. [2022-11-02 20:50:18,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:50:18,920 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 31.333333333333332) internal successors, (282), 9 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2022-11-02 20:50:18,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:18,930 INFO L225 Difference]: With dead ends: 4858 [2022-11-02 20:50:18,930 INFO L226 Difference]: Without dead ends: 3320 [2022-11-02 20:50:18,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:50:18,934 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 286 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:18,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 744 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:50:18,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3320 states. [2022-11-02 20:50:19,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3320 to 1690. [2022-11-02 20:50:19,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.3966844286560094) internal successors, (2359), 1689 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2359 transitions. [2022-11-02 20:50:19,023 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2359 transitions. Word has length 242 [2022-11-02 20:50:19,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:19,024 INFO L495 AbstractCegarLoop]: Abstraction has 1690 states and 2359 transitions. [2022-11-02 20:50:19,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 31.333333333333332) internal successors, (282), 9 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:19,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2359 transitions. [2022-11-02 20:50:19,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-02 20:50:19,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:19,028 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:19,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:19,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:50:19,244 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:19,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:19,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1765690335, now seen corresponding path program 1 times [2022-11-02 20:50:19,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:50:19,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538140483] [2022-11-02 20:50:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:19,245 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:50:19,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:50:19,246 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:50:19,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-02 20:50:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:19,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:50:19,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 30 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-02 20:50:19,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:20,277 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 30 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-02 20:50:20,278 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:50:20,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538140483] [2022-11-02 20:50:20,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538140483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:20,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:50:20,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-11-02 20:50:20,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619138514] [2022-11-02 20:50:20,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:20,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:50:20,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:50:20,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:50:20,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:50:20,283 INFO L87 Difference]: Start difference. First operand 1690 states and 2359 transitions. Second operand has 19 states, 19 states have (on average 11.789473684210526) internal successors, (224), 19 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:21,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:21,685 INFO L93 Difference]: Finished difference Result 11776 states and 16711 transitions. [2022-11-02 20:50:21,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 20:50:21,685 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 11.789473684210526) internal successors, (224), 19 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2022-11-02 20:50:21,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:21,711 INFO L225 Difference]: With dead ends: 11776 [2022-11-02 20:50:21,712 INFO L226 Difference]: Without dead ends: 10206 [2022-11-02 20:50:21,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=578, Invalid=1972, Unknown=0, NotChecked=0, Total=2550 [2022-11-02 20:50:21,716 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 4743 mSDsluCounter, 1296 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4743 SdHoareTripleChecker+Valid, 1420 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:21,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4743 Valid, 1420 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:50:21,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10206 states. [2022-11-02 20:50:21,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10206 to 3444. [2022-11-02 20:50:21,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3444 states, 3443 states have (on average 1.392099912866686) internal successors, (4793), 3443 states have internal predecessors, (4793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:21,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3444 states to 3444 states and 4793 transitions. [2022-11-02 20:50:21,915 INFO L78 Accepts]: Start accepts. Automaton has 3444 states and 4793 transitions. Word has length 242 [2022-11-02 20:50:21,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:21,915 INFO L495 AbstractCegarLoop]: Abstraction has 3444 states and 4793 transitions. [2022-11-02 20:50:21,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.789473684210526) internal successors, (224), 19 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:21,916 INFO L276 IsEmpty]: Start isEmpty. Operand 3444 states and 4793 transitions. [2022-11-02 20:50:21,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-02 20:50:21,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:21,923 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:21,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:22,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:50:22,140 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:22,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:22,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1032970271, now seen corresponding path program 1 times [2022-11-02 20:50:22,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:50:22,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855841856] [2022-11-02 20:50:22,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:22,141 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:50:22,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:50:22,142 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:50:22,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-02 20:50:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:22,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:50:22,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 32 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-02 20:50:22,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 193 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-02 20:50:23,072 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:50:23,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855841856] [2022-11-02 20:50:23,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855841856] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:23,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:50:23,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-02 20:50:23,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473698933] [2022-11-02 20:50:23,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:23,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:50:23,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:50:23,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:50:23,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:50:23,075 INFO L87 Difference]: Start difference. First operand 3444 states and 4793 transitions. Second operand has 11 states, 11 states have (on average 23.272727272727273) internal successors, (256), 11 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:23,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:23,741 INFO L93 Difference]: Finished difference Result 17180 states and 24189 transitions. [2022-11-02 20:50:23,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:50:23,741 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 23.272727272727273) internal successors, (256), 11 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2022-11-02 20:50:23,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:23,760 INFO L225 Difference]: With dead ends: 17180 [2022-11-02 20:50:23,760 INFO L226 Difference]: Without dead ends: 13946 [2022-11-02 20:50:23,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:50:23,766 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 741 mSDsluCounter, 1556 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 1737 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:23,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 1737 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:50:23,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13946 states. [2022-11-02 20:50:24,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13946 to 6676. [2022-11-02 20:50:24,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6676 states, 6675 states have (on average 1.3964044943820224) internal successors, (9321), 6675 states have internal predecessors, (9321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:24,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6676 states to 6676 states and 9321 transitions. [2022-11-02 20:50:24,077 INFO L78 Accepts]: Start accepts. Automaton has 6676 states and 9321 transitions. Word has length 242 [2022-11-02 20:50:24,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:24,077 INFO L495 AbstractCegarLoop]: Abstraction has 6676 states and 9321 transitions. [2022-11-02 20:50:24,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.272727272727273) internal successors, (256), 11 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:24,078 INFO L276 IsEmpty]: Start isEmpty. Operand 6676 states and 9321 transitions. [2022-11-02 20:50:24,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-02 20:50:24,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:24,087 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:24,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:24,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:50:24,305 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:24,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:24,305 INFO L85 PathProgramCache]: Analyzing trace with hash -357810145, now seen corresponding path program 2 times [2022-11-02 20:50:24,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:50:24,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338983672] [2022-11-02 20:50:24,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:50:24,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:50:24,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:50:24,307 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:50:24,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-02 20:50:24,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:50:24,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:50:24,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:50:24,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-02 20:50:25,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-02 20:50:25,367 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:50:25,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338983672] [2022-11-02 20:50:25,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338983672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:25,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:50:25,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-11-02 20:50:25,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111005297] [2022-11-02 20:50:25,367 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:25,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:50:25,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:50:25,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:50:25,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:50:25,369 INFO L87 Difference]: Start difference. First operand 6676 states and 9321 transitions. Second operand has 19 states, 19 states have (on average 12.421052631578947) internal successors, (236), 19 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:27,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:27,282 INFO L93 Difference]: Finished difference Result 46792 states and 66021 transitions. [2022-11-02 20:50:27,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 20:50:27,283 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 12.421052631578947) internal successors, (236), 19 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2022-11-02 20:50:27,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:27,333 INFO L225 Difference]: With dead ends: 46792 [2022-11-02 20:50:27,333 INFO L226 Difference]: Without dead ends: 40326 [2022-11-02 20:50:27,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=578, Invalid=1972, Unknown=0, NotChecked=0, Total=2550 [2022-11-02 20:50:27,351 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 4114 mSDsluCounter, 1327 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4114 SdHoareTripleChecker+Valid, 1454 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:27,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4114 Valid, 1454 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:50:27,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40326 states. [2022-11-02 20:50:28,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40326 to 13692. [2022-11-02 20:50:28,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13692 states, 13691 states have (on average 1.3906215762179535) internal successors, (19039), 13691 states have internal predecessors, (19039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:28,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13692 states to 13692 states and 19039 transitions. [2022-11-02 20:50:28,094 INFO L78 Accepts]: Start accepts. Automaton has 13692 states and 19039 transitions. Word has length 242 [2022-11-02 20:50:28,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:28,095 INFO L495 AbstractCegarLoop]: Abstraction has 13692 states and 19039 transitions. [2022-11-02 20:50:28,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 12.421052631578947) internal successors, (236), 19 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:28,095 INFO L276 IsEmpty]: Start isEmpty. Operand 13692 states and 19039 transitions. [2022-11-02 20:50:28,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-02 20:50:28,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:28,128 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:28,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:28,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:50:28,345 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:28,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:28,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1140556833, now seen corresponding path program 1 times [2022-11-02 20:50:28,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:50:28,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799662759] [2022-11-02 20:50:28,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:28,347 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:50:28,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:50:28,351 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:50:28,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-02 20:50:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:28,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:50:28,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 42 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-02 20:50:29,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 42 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-02 20:50:29,387 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:50:29,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799662759] [2022-11-02 20:50:29,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799662759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:29,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:50:29,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-11-02 20:50:29,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945108085] [2022-11-02 20:50:29,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:29,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:50:29,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:50:29,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:50:29,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:50:29,390 INFO L87 Difference]: Start difference. First operand 13692 states and 19039 transitions. Second operand has 19 states, 19 states have (on average 12.736842105263158) internal successors, (242), 19 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:31,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:31,739 INFO L93 Difference]: Finished difference Result 49132 states and 69375 transitions. [2022-11-02 20:50:31,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-02 20:50:31,740 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 12.736842105263158) internal successors, (242), 19 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2022-11-02 20:50:31,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:31,777 INFO L225 Difference]: With dead ends: 49132 [2022-11-02 20:50:31,777 INFO L226 Difference]: Without dead ends: 42474 [2022-11-02 20:50:31,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=881, Invalid=3151, Unknown=0, NotChecked=0, Total=4032 [2022-11-02 20:50:31,787 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 3972 mSDsluCounter, 1799 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3972 SdHoareTripleChecker+Valid, 1931 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:31,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3972 Valid, 1931 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:50:31,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42474 states. [2022-11-02 20:50:32,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42474 to 14460. [2022-11-02 20:50:32,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14460 states, 14459 states have (on average 1.3875786707241164) internal successors, (20063), 14459 states have internal predecessors, (20063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:32,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14460 states to 14460 states and 20063 transitions. [2022-11-02 20:50:32,846 INFO L78 Accepts]: Start accepts. Automaton has 14460 states and 20063 transitions. Word has length 242 [2022-11-02 20:50:32,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:32,847 INFO L495 AbstractCegarLoop]: Abstraction has 14460 states and 20063 transitions. [2022-11-02 20:50:32,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 12.736842105263158) internal successors, (242), 19 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:32,847 INFO L276 IsEmpty]: Start isEmpty. Operand 14460 states and 20063 transitions. [2022-11-02 20:50:32,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-02 20:50:32,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:32,874 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:32,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:33,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:50:33,090 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:33,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:33,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1025445155, now seen corresponding path program 1 times [2022-11-02 20:50:33,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:50:33,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765207615] [2022-11-02 20:50:33,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:33,093 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:50:33,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:50:33,094 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:50:33,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-02 20:50:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:33,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:50:33,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 44 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-02 20:50:34,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:34,448 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 44 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-02 20:50:34,448 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:50:34,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765207615] [2022-11-02 20:50:34,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765207615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:34,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:50:34,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-11-02 20:50:34,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067667330] [2022-11-02 20:50:34,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:34,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:50:34,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:50:34,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:50:34,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:50:34,451 INFO L87 Difference]: Start difference. First operand 14460 states and 20063 transitions. Second operand has 13 states, 13 states have (on average 25.307692307692307) internal successors, (329), 13 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:36,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:36,245 INFO L93 Difference]: Finished difference Result 71684 states and 99811 transitions. [2022-11-02 20:50:36,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:50:36,247 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 25.307692307692307) internal successors, (329), 13 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2022-11-02 20:50:36,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:36,297 INFO L225 Difference]: With dead ends: 71684 [2022-11-02 20:50:36,298 INFO L226 Difference]: Without dead ends: 57602 [2022-11-02 20:50:36,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:50:36,316 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 999 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:36,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [999 Valid, 1263 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:50:36,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57602 states. [2022-11-02 20:50:37,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57602 to 28540. [2022-11-02 20:50:37,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28540 states, 28539 states have (on average 1.3869792214163075) internal successors, (39583), 28539 states have internal predecessors, (39583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:37,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28540 states to 28540 states and 39583 transitions. [2022-11-02 20:50:37,885 INFO L78 Accepts]: Start accepts. Automaton has 28540 states and 39583 transitions. Word has length 242 [2022-11-02 20:50:37,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:37,885 INFO L495 AbstractCegarLoop]: Abstraction has 28540 states and 39583 transitions. [2022-11-02 20:50:37,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 25.307692307692307) internal successors, (329), 13 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:37,886 INFO L276 IsEmpty]: Start isEmpty. Operand 28540 states and 39583 transitions. [2022-11-02 20:50:37,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-02 20:50:37,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:37,944 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:37,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:38,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:50:38,164 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:38,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:38,165 INFO L85 PathProgramCache]: Analyzing trace with hash -817030559, now seen corresponding path program 2 times [2022-11-02 20:50:38,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:50:38,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [886161785] [2022-11-02 20:50:38,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:50:38,166 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:50:38,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:50:38,167 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:50:38,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-02 20:50:38,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:50:38,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:50:38,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:50:38,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-02 20:50:39,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-02 20:50:39,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:50:39,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [886161785] [2022-11-02 20:50:39,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [886161785] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:39,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:50:39,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-11-02 20:50:39,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285371900] [2022-11-02 20:50:39,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:39,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:50:39,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:50:39,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:50:39,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:50:39,877 INFO L87 Difference]: Start difference. First operand 28540 states and 39583 transitions. Second operand has 12 states, 12 states have (on average 20.75) internal successors, (249), 12 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:42,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:42,881 INFO L93 Difference]: Finished difference Result 145540 states and 202403 transitions. [2022-11-02 20:50:42,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:50:42,882 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 20.75) internal successors, (249), 12 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2022-11-02 20:50:42,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:42,960 INFO L225 Difference]: With dead ends: 145540 [2022-11-02 20:50:42,960 INFO L226 Difference]: Without dead ends: 117378 [2022-11-02 20:50:42,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 471 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:50:42,989 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 958 mSDsluCounter, 1542 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 958 SdHoareTripleChecker+Valid, 1739 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:42,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [958 Valid, 1739 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:50:43,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117378 states. [2022-11-02 20:50:45,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117378 to 56700. [2022-11-02 20:50:45,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56700 states, 56699 states have (on average 1.384415950898605) internal successors, (78495), 56699 states have internal predecessors, (78495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:45,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56700 states to 56700 states and 78495 transitions. [2022-11-02 20:50:45,725 INFO L78 Accepts]: Start accepts. Automaton has 56700 states and 78495 transitions. Word has length 242 [2022-11-02 20:50:45,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:45,726 INFO L495 AbstractCegarLoop]: Abstraction has 56700 states and 78495 transitions. [2022-11-02 20:50:45,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 20.75) internal successors, (249), 12 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:45,726 INFO L276 IsEmpty]: Start isEmpty. Operand 56700 states and 78495 transitions. [2022-11-02 20:50:45,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-02 20:50:45,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:45,807 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:45,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-02 20:50:46,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:50:46,019 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:46,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:46,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1149673697, now seen corresponding path program 3 times [2022-11-02 20:50:46,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:50:46,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83933080] [2022-11-02 20:50:46,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:50:46,021 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:50:46,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:50:46,022 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:50:46,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-02 20:50:46,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:50:46,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:50:46,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:50:46,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-02 20:50:46,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:50:46,413 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:50:46,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83933080] [2022-11-02 20:50:46,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83933080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:46,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:46,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:50:46,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217375787] [2022-11-02 20:50:46,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:46,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:50:46,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:50:46,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:50:46,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:50:46,416 INFO L87 Difference]: Start difference. First operand 56700 states and 78495 transitions. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:49,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:49,149 INFO L93 Difference]: Finished difference Result 164324 states and 228516 transitions. [2022-11-02 20:50:49,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:50:49,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2022-11-02 20:50:49,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:49,250 INFO L225 Difference]: With dead ends: 164324 [2022-11-02 20:50:49,251 INFO L226 Difference]: Without dead ends: 107646 [2022-11-02 20:50:49,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:50:49,336 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 569 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:49,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [569 Valid, 420 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:50:49,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107646 states. [2022-11-02 20:50:51,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107646 to 57212. [2022-11-02 20:50:51,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57212 states, 57211 states have (on average 1.3809582073377498) internal successors, (79006), 57211 states have internal predecessors, (79006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:51,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57212 states to 57212 states and 79006 transitions. [2022-11-02 20:50:51,593 INFO L78 Accepts]: Start accepts. Automaton has 57212 states and 79006 transitions. Word has length 242 [2022-11-02 20:50:51,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:51,594 INFO L495 AbstractCegarLoop]: Abstraction has 57212 states and 79006 transitions. [2022-11-02 20:50:51,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:51,594 INFO L276 IsEmpty]: Start isEmpty. Operand 57212 states and 79006 transitions. [2022-11-02 20:50:51,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-02 20:50:51,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:51,677 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:51,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:51,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:50:51,878 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:51,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:51,879 INFO L85 PathProgramCache]: Analyzing trace with hash 811900961, now seen corresponding path program 1 times [2022-11-02 20:50:51,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:50:51,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [371073338] [2022-11-02 20:50:51,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:51,880 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:50:51,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:50:51,881 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:50:51,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-02 20:50:52,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:52,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:50:52,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 48 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-02 20:50:52,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 177 proven. 33 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-02 20:50:53,004 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:50:53,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [371073338] [2022-11-02 20:50:53,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [371073338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:53,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:50:53,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2022-11-02 20:50:53,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245068965] [2022-11-02 20:50:53,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:53,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:50:53,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:50:53,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:50:53,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:50:53,007 INFO L87 Difference]: Start difference. First operand 57212 states and 79006 transitions. Second operand has 17 states, 17 states have (on average 13.764705882352942) internal successors, (234), 17 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:57,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:57,069 INFO L93 Difference]: Finished difference Result 184196 states and 255010 transitions. [2022-11-02 20:50:57,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:50:57,070 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 13.764705882352942) internal successors, (234), 17 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2022-11-02 20:50:57,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:57,160 INFO L225 Difference]: With dead ends: 184196 [2022-11-02 20:50:57,160 INFO L226 Difference]: Without dead ends: 127362 [2022-11-02 20:50:57,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=841, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:50:57,208 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 1814 mSDsluCounter, 1448 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1814 SdHoareTripleChecker+Valid, 1592 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:57,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1814 Valid, 1592 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:50:57,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127362 states. [2022-11-02 20:50:59,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127362 to 68732. [2022-11-02 20:50:59,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68732 states, 68731 states have (on average 1.3711134713593576) internal successors, (94238), 68731 states have internal predecessors, (94238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:59,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68732 states to 68732 states and 94238 transitions. [2022-11-02 20:50:59,814 INFO L78 Accepts]: Start accepts. Automaton has 68732 states and 94238 transitions. Word has length 242 [2022-11-02 20:50:59,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:59,815 INFO L495 AbstractCegarLoop]: Abstraction has 68732 states and 94238 transitions. [2022-11-02 20:50:59,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 13.764705882352942) internal successors, (234), 17 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:59,815 INFO L276 IsEmpty]: Start isEmpty. Operand 68732 states and 94238 transitions. [2022-11-02 20:50:59,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-02 20:50:59,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:59,862 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:59,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:00,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:51:00,063 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:51:00,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:00,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1969781729, now seen corresponding path program 1 times [2022-11-02 20:51:00,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:51:00,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897276373] [2022-11-02 20:51:00,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:00,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:51:00,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:51:00,066 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:51:00,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-02 20:51:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:00,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:51:00,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:01,230 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 7 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-02 20:51:01,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 7 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-02 20:51:01,695 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:51:01,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897276373] [2022-11-02 20:51:01,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897276373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:01,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:51:01,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-11-02 20:51:01,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651095994] [2022-11-02 20:51:01,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:01,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:51:01,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:51:01,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:51:01,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:51:01,697 INFO L87 Difference]: Start difference. First operand 68732 states and 94238 transitions. Second operand has 12 states, 12 states have (on average 21.083333333333332) internal successors, (253), 12 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:05,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:51:05,318 INFO L93 Difference]: Finished difference Result 208772 states and 286882 transitions. [2022-11-02 20:51:05,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:51:05,318 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 21.083333333333332) internal successors, (253), 12 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2022-11-02 20:51:05,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:51:05,433 INFO L225 Difference]: With dead ends: 208772 [2022-11-02 20:51:05,433 INFO L226 Difference]: Without dead ends: 140418 [2022-11-02 20:51:05,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 471 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:51:05,592 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 1046 mSDsluCounter, 1325 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1046 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:51:05,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1046 Valid, 1524 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:51:05,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140418 states. [2022-11-02 20:51:08,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140418 to 68732. [2022-11-02 20:51:08,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68732 states, 68731 states have (on average 1.3673888056335568) internal successors, (93982), 68731 states have internal predecessors, (93982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:08,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68732 states to 68732 states and 93982 transitions. [2022-11-02 20:51:08,482 INFO L78 Accepts]: Start accepts. Automaton has 68732 states and 93982 transitions. Word has length 242 [2022-11-02 20:51:08,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:51:08,482 INFO L495 AbstractCegarLoop]: Abstraction has 68732 states and 93982 transitions. [2022-11-02 20:51:08,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.083333333333332) internal successors, (253), 12 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:08,483 INFO L276 IsEmpty]: Start isEmpty. Operand 68732 states and 93982 transitions. [2022-11-02 20:51:08,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-02 20:51:08,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:51:08,535 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:08,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:08,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:51:08,744 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:51:08,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:08,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1853829217, now seen corresponding path program 2 times [2022-11-02 20:51:08,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:51:08,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193415562] [2022-11-02 20:51:08,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:51:08,746 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:51:08,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:51:08,747 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:51:08,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_252b96d1-8eaa-4e68-bdbf-d474b6e06502/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-02 20:51:09,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:51:09,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:51:09,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:51:09,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 54 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 20:51:09,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 177 proven. 39 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 20:51:09,651 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:51:09,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193415562] [2022-11-02 20:51:09,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193415562] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:09,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:51:09,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2022-11-02 20:51:09,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449709586] [2022-11-02 20:51:09,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:09,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:51:09,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:51:09,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:51:09,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:51:09,654 INFO L87 Difference]: Start difference. First operand 68732 states and 93982 transitions. Second operand has 17 states, 17 states have (on average 14.117647058823529) internal successors, (240), 17 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)