./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/heapsort.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/heapsort.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8e7c8e5dc2a9e8f11b25d1bb9948f05f37b9553e3dc9f8bd8213088dea43cb37 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:55:24,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:55:24,389 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:55:24,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:55:24,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:55:24,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:55:24,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:55:24,424 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:55:24,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:55:24,426 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:55:24,427 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:55:24,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:55:24,429 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:55:24,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:55:24,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:55:24,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:55:24,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:55:24,433 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:55:24,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:55:24,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:55:24,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:55:24,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:55:24,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:55:24,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:55:24,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:55:24,444 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:55:24,445 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:55:24,446 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:55:24,446 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:55:24,447 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:55:24,447 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:55:24,448 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:55:24,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:55:24,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:55:24,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:55:24,450 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:55:24,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:55:24,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:55:24,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:55:24,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:55:24,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:55:24,453 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:55:24,476 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:55:24,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:55:24,477 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:55:24,477 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:55:24,477 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:55:24,478 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:55:24,478 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:55:24,479 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:55:24,479 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:55:24,479 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:55:24,479 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:55:24,479 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:55:24,479 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:55:24,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:55:24,480 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:55:24,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:55:24,480 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:55:24,480 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:55:24,481 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:55:24,481 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:55:24,481 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:55:24,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:55:24,481 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:55:24,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:55:24,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:55:24,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:55:24,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:55:24,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:55:24,482 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:55:24,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:55:24,483 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:55:24,483 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:55:24,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:55:24,483 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:55:24,483 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_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e7c8e5dc2a9e8f11b25d1bb9948f05f37b9553e3dc9f8bd8213088dea43cb37 [2021-12-06 18:55:24,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:55:24,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:55:24,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:55:24,696 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:55:24,697 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:55:24,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/loop-invgen/heapsort.i [2021-12-06 18:55:24,748 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/data/0cca6864b/c08242dd92784da190dda3402314e1c5/FLAG6c0184557 [2021-12-06 18:55:25,130 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:55:25,130 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/sv-benchmarks/c/loop-invgen/heapsort.i [2021-12-06 18:55:25,135 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/data/0cca6864b/c08242dd92784da190dda3402314e1c5/FLAG6c0184557 [2021-12-06 18:55:25,146 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/data/0cca6864b/c08242dd92784da190dda3402314e1c5 [2021-12-06 18:55:25,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:55:25,149 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:55:25,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:55:25,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:55:25,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:55:25,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:55:25" (1/1) ... [2021-12-06 18:55:25,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b5d4aa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:25, skipping insertion in model container [2021-12-06 18:55:25,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:55:25" (1/1) ... [2021-12-06 18:55:25,160 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:55:25,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:55:25,297 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_a878d267-63b2-4a09-902f-76a4014ba928/sv-benchmarks/c/loop-invgen/heapsort.i[893,906] [2021-12-06 18:55:25,309 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:55:25,315 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:55:25,323 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_a878d267-63b2-4a09-902f-76a4014ba928/sv-benchmarks/c/loop-invgen/heapsort.i[893,906] [2021-12-06 18:55:25,329 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:55:25,339 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:55:25,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:25 WrapperNode [2021-12-06 18:55:25,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:55:25,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:55:25,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:55:25,340 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:55:25,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:25" (1/1) ... [2021-12-06 18:55:25,353 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:25" (1/1) ... [2021-12-06 18:55:25,371 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2021-12-06 18:55:25,371 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:55:25,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:55:25,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:55:25,371 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:55:25,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:25" (1/1) ... [2021-12-06 18:55:25,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:25" (1/1) ... [2021-12-06 18:55:25,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:25" (1/1) ... [2021-12-06 18:55:25,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:25" (1/1) ... [2021-12-06 18:55:25,382 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:25" (1/1) ... [2021-12-06 18:55:25,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:25" (1/1) ... [2021-12-06 18:55:25,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:25" (1/1) ... [2021-12-06 18:55:25,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:55:25,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:55:25,388 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:55:25,388 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:55:25,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:25" (1/1) ... [2021-12-06 18:55:25,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:55:25,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:55:25,417 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:55:25,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:55:25,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:55:25,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:55:25,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:55:25,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:55:25,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 18:55:25,455 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 18:55:25,503 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:55:25,504 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:55:25,597 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:55:25,603 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:55:25,603 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 18:55:25,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:55:25 BoogieIcfgContainer [2021-12-06 18:55:25,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:55:25,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:55:25,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:55:25,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:55:25,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:55:25" (1/3) ... [2021-12-06 18:55:25,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@679d70f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:55:25, skipping insertion in model container [2021-12-06 18:55:25,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:25" (2/3) ... [2021-12-06 18:55:25,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@679d70f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:55:25, skipping insertion in model container [2021-12-06 18:55:25,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:55:25" (3/3) ... [2021-12-06 18:55:25,611 INFO L111 eAbstractionObserver]: Analyzing ICFG heapsort.i [2021-12-06 18:55:25,615 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:55:25,615 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:55:25,654 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:55:25,660 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 18:55:25,660 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:55:25,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 18:55:25,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 18:55:25,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:25,681 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:25,682 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:25,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:25,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1754201352, now seen corresponding path program 1 times [2021-12-06 18:55:25,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:25,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996482708] [2021-12-06 18:55:25,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:25,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:25,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:25,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996482708] [2021-12-06 18:55:25,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996482708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:55:25,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:55:25,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:55:25,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925866654] [2021-12-06 18:55:25,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:55:25,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:55:25,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:25,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:55:25,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:55:25,891 INFO L87 Difference]: Start difference. First operand has 39 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:25,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:25,985 INFO L93 Difference]: Finished difference Result 104 states and 193 transitions. [2021-12-06 18:55:25,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:55:25,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 18:55:25,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:25,994 INFO L225 Difference]: With dead ends: 104 [2021-12-06 18:55:25,994 INFO L226 Difference]: Without dead ends: 61 [2021-12-06 18:55:25,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:55:26,002 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 25 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:26,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 224 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:55:26,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-06 18:55:26,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2021-12-06 18:55:26,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 18:55:26,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 57 transitions. [2021-12-06 18:55:26,046 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 57 transitions. Word has length 11 [2021-12-06 18:55:26,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:26,046 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 57 transitions. [2021-12-06 18:55:26,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:26,047 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 57 transitions. [2021-12-06 18:55:26,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 18:55:26,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:26,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:26,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:55:26,048 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:26,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:26,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1749464583, now seen corresponding path program 1 times [2021-12-06 18:55:26,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:26,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219794384] [2021-12-06 18:55:26,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:26,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:26,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:26,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219794384] [2021-12-06 18:55:26,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219794384] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:55:26,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:55:26,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:55:26,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450867093] [2021-12-06 18:55:26,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:55:26,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:55:26,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:26,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:55:26,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:55:26,102 INFO L87 Difference]: Start difference. First operand 39 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:26,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:26,154 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-12-06 18:55:26,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:55:26,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 18:55:26,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:26,156 INFO L225 Difference]: With dead ends: 46 [2021-12-06 18:55:26,156 INFO L226 Difference]: Without dead ends: 44 [2021-12-06 18:55:26,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:55:26,157 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 17 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:26,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 141 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:55:26,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-06 18:55:26,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-12-06 18:55:26,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 18:55:26,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2021-12-06 18:55:26,170 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 11 [2021-12-06 18:55:26,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:26,170 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2021-12-06 18:55:26,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:26,171 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2021-12-06 18:55:26,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 18:55:26,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:26,172 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:26,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:55:26,172 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:26,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:26,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1728015063, now seen corresponding path program 1 times [2021-12-06 18:55:26,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:26,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996039401] [2021-12-06 18:55:26,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:26,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:26,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:26,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996039401] [2021-12-06 18:55:26,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996039401] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:55:26,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:55:26,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:55:26,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492272248] [2021-12-06 18:55:26,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:55:26,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:55:26,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:26,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:55:26,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:55:26,233 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:26,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:26,333 INFO L93 Difference]: Finished difference Result 76 states and 111 transitions. [2021-12-06 18:55:26,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:55:26,333 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 18:55:26,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:26,335 INFO L225 Difference]: With dead ends: 76 [2021-12-06 18:55:26,335 INFO L226 Difference]: Without dead ends: 74 [2021-12-06 18:55:26,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:55:26,336 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 30 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:26,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 214 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:55:26,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-06 18:55:26,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2021-12-06 18:55:26,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 26 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-06 18:55:26,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 102 transitions. [2021-12-06 18:55:26,349 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 102 transitions. Word has length 11 [2021-12-06 18:55:26,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:26,349 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 102 transitions. [2021-12-06 18:55:26,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:26,350 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 102 transitions. [2021-12-06 18:55:26,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 18:55:26,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:26,350 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:26,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 18:55:26,351 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:26,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:26,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1885075524, now seen corresponding path program 1 times [2021-12-06 18:55:26,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:26,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311756731] [2021-12-06 18:55:26,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:26,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:26,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:55:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:26,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:26,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311756731] [2021-12-06 18:55:26,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311756731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:55:26,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:55:26,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:55:26,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244356505] [2021-12-06 18:55:26,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:55:26,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:55:26,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:26,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:55:26,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:55:26,409 INFO L87 Difference]: Start difference. First operand 69 states and 102 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:55:26,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:26,529 INFO L93 Difference]: Finished difference Result 102 states and 153 transitions. [2021-12-06 18:55:26,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:55:26,530 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-06 18:55:26,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:26,531 INFO L225 Difference]: With dead ends: 102 [2021-12-06 18:55:26,531 INFO L226 Difference]: Without dead ends: 100 [2021-12-06 18:55:26,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:55:26,533 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 43 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:26,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 269 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:55:26,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-06 18:55:26,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2021-12-06 18:55:26,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 52 states have internal predecessors, (68), 40 states have call successors, (40), 5 states have call predecessors, (40), 5 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2021-12-06 18:55:26,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 148 transitions. [2021-12-06 18:55:26,561 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 148 transitions. Word has length 16 [2021-12-06 18:55:26,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:26,561 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 148 transitions. [2021-12-06 18:55:26,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:55:26,562 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 148 transitions. [2021-12-06 18:55:26,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 18:55:26,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:26,563 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:26,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 18:55:26,564 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:26,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:26,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1503713061, now seen corresponding path program 1 times [2021-12-06 18:55:26,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:26,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908547233] [2021-12-06 18:55:26,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:26,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:26,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:55:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:26,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:26,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908547233] [2021-12-06 18:55:26,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908547233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:55:26,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:55:26,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:55:26,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755357392] [2021-12-06 18:55:26,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:55:26,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:55:26,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:26,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:55:26,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:55:26,605 INFO L87 Difference]: Start difference. First operand 97 states and 148 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:55:26,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:26,645 INFO L93 Difference]: Finished difference Result 103 states and 153 transitions. [2021-12-06 18:55:26,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:55:26,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-06 18:55:26,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:26,647 INFO L225 Difference]: With dead ends: 103 [2021-12-06 18:55:26,647 INFO L226 Difference]: Without dead ends: 101 [2021-12-06 18:55:26,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:55:26,649 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 16 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:26,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 141 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:55:26,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-06 18:55:26,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-12-06 18:55:26,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 55 states have internal predecessors, (71), 40 states have call successors, (40), 6 states have call predecessors, (40), 6 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2021-12-06 18:55:26,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 151 transitions. [2021-12-06 18:55:26,663 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 151 transitions. Word has length 16 [2021-12-06 18:55:26,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:26,664 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 151 transitions. [2021-12-06 18:55:26,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:55:26,664 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 151 transitions. [2021-12-06 18:55:26,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 18:55:26,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:26,665 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:26,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 18:55:26,665 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:26,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:26,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1518715221, now seen corresponding path program 1 times [2021-12-06 18:55:26,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:26,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629480950] [2021-12-06 18:55:26,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:26,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:26,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:55:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:26,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:26,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629480950] [2021-12-06 18:55:26,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629480950] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:55:26,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:55:26,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:55:26,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273230242] [2021-12-06 18:55:26,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:55:26,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:55:26,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:26,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:55:26,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:55:26,714 INFO L87 Difference]: Start difference. First operand 101 states and 151 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:55:26,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:26,848 INFO L93 Difference]: Finished difference Result 155 states and 240 transitions. [2021-12-06 18:55:26,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:55:26,848 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-06 18:55:26,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:26,850 INFO L225 Difference]: With dead ends: 155 [2021-12-06 18:55:26,850 INFO L226 Difference]: Without dead ends: 153 [2021-12-06 18:55:26,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:55:26,851 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 64 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:26,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 289 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:55:26,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-06 18:55:26,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 137. [2021-12-06 18:55:26,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 69 states have (on average 1.3623188405797102) internal successors, (94), 72 states have internal predecessors, (94), 60 states have call successors, (60), 7 states have call predecessors, (60), 7 states have return successors, (60), 57 states have call predecessors, (60), 60 states have call successors, (60) [2021-12-06 18:55:26,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 214 transitions. [2021-12-06 18:55:26,871 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 214 transitions. Word has length 16 [2021-12-06 18:55:26,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:26,871 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 214 transitions. [2021-12-06 18:55:26,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:55:26,871 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 214 transitions. [2021-12-06 18:55:26,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 18:55:26,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:26,872 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:26,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 18:55:26,872 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:26,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:26,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1823085758, now seen corresponding path program 1 times [2021-12-06 18:55:26,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:26,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416265847] [2021-12-06 18:55:26,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:26,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:26,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:55:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:26,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:26,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416265847] [2021-12-06 18:55:26,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416265847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:55:26,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:55:26,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:55:26,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174734760] [2021-12-06 18:55:26,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:55:26,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:55:26,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:26,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:55:26,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:55:26,898 INFO L87 Difference]: Start difference. First operand 137 states and 214 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:55:26,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:26,921 INFO L93 Difference]: Finished difference Result 274 states and 436 transitions. [2021-12-06 18:55:26,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:55:26,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-06 18:55:26,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:26,923 INFO L225 Difference]: With dead ends: 274 [2021-12-06 18:55:26,923 INFO L226 Difference]: Without dead ends: 205 [2021-12-06 18:55:26,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:55:26,925 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 11 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:26,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 126 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:55:26,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-06 18:55:26,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2021-12-06 18:55:26,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 99 states have (on average 1.404040404040404) internal successors, (139), 103 states have internal predecessors, (139), 98 states have call successors, (98), 7 states have call predecessors, (98), 7 states have return successors, (98), 94 states have call predecessors, (98), 98 states have call successors, (98) [2021-12-06 18:55:26,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 335 transitions. [2021-12-06 18:55:26,953 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 335 transitions. Word has length 16 [2021-12-06 18:55:26,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:26,953 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 335 transitions. [2021-12-06 18:55:26,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:55:26,953 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 335 transitions. [2021-12-06 18:55:26,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 18:55:26,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:26,954 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:26,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 18:55:26,954 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:26,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:26,955 INFO L85 PathProgramCache]: Analyzing trace with hash -2105521235, now seen corresponding path program 1 times [2021-12-06 18:55:26,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:26,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503426371] [2021-12-06 18:55:26,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:26,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:26,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:55:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:26,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:26,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503426371] [2021-12-06 18:55:26,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503426371] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:55:26,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:55:26,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:55:26,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016032313] [2021-12-06 18:55:26,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:55:26,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:55:26,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:26,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:55:26,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:55:26,987 INFO L87 Difference]: Start difference. First operand 205 states and 335 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:55:27,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:27,023 INFO L93 Difference]: Finished difference Result 230 states and 359 transitions. [2021-12-06 18:55:27,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:55:27,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-06 18:55:27,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:27,026 INFO L225 Difference]: With dead ends: 230 [2021-12-06 18:55:27,026 INFO L226 Difference]: Without dead ends: 183 [2021-12-06 18:55:27,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:55:27,027 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 5 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:27,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 181 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:55:27,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-06 18:55:27,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2021-12-06 18:55:27,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 89 states have (on average 1.3932584269662922) internal successors, (124), 93 states have internal predecessors, (124), 86 states have call successors, (86), 7 states have call predecessors, (86), 7 states have return successors, (86), 82 states have call predecessors, (86), 86 states have call successors, (86) [2021-12-06 18:55:27,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 296 transitions. [2021-12-06 18:55:27,046 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 296 transitions. Word has length 16 [2021-12-06 18:55:27,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:27,046 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 296 transitions. [2021-12-06 18:55:27,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:55:27,046 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 296 transitions. [2021-12-06 18:55:27,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 18:55:27,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:27,047 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:27,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 18:55:27,047 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:27,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:27,048 INFO L85 PathProgramCache]: Analyzing trace with hash 186914675, now seen corresponding path program 1 times [2021-12-06 18:55:27,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:27,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776036493] [2021-12-06 18:55:27,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:27,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:27,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:55:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:27,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:55:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:55:27,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:27,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776036493] [2021-12-06 18:55:27,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776036493] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:55:27,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:55:27,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:55:27,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933002007] [2021-12-06 18:55:27,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:55:27,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:55:27,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:27,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:55:27,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:55:27,086 INFO L87 Difference]: Start difference. First operand 183 states and 296 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:55:27,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:27,163 INFO L93 Difference]: Finished difference Result 217 states and 348 transitions. [2021-12-06 18:55:27,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:55:27,163 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-12-06 18:55:27,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:27,165 INFO L225 Difference]: With dead ends: 217 [2021-12-06 18:55:27,166 INFO L226 Difference]: Without dead ends: 215 [2021-12-06 18:55:27,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:55:27,167 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 43 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:27,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 305 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:55:27,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-12-06 18:55:27,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 197. [2021-12-06 18:55:27,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 96 states have (on average 1.3854166666666667) internal successors, (133), 102 states have internal predecessors, (133), 92 states have call successors, (92), 8 states have call predecessors, (92), 8 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2021-12-06 18:55:27,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 317 transitions. [2021-12-06 18:55:27,191 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 317 transitions. Word has length 23 [2021-12-06 18:55:27,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:27,192 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 317 transitions. [2021-12-06 18:55:27,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:55:27,192 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 317 transitions. [2021-12-06 18:55:27,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 18:55:27,193 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:27,193 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:27,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 18:55:27,193 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:27,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:27,193 INFO L85 PathProgramCache]: Analyzing trace with hash 768784003, now seen corresponding path program 1 times [2021-12-06 18:55:27,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:27,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055631820] [2021-12-06 18:55:27,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:27,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:27,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:55:27,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:27,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:55:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:55:27,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:27,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055631820] [2021-12-06 18:55:27,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055631820] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:55:27,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:55:27,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:55:27,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841846908] [2021-12-06 18:55:27,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:55:27,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:55:27,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:27,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:55:27,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:55:27,225 INFO L87 Difference]: Start difference. First operand 197 states and 317 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:55:27,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:27,378 INFO L93 Difference]: Finished difference Result 520 states and 854 transitions. [2021-12-06 18:55:27,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:55:27,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-12-06 18:55:27,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:27,381 INFO L225 Difference]: With dead ends: 520 [2021-12-06 18:55:27,381 INFO L226 Difference]: Without dead ends: 366 [2021-12-06 18:55:27,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:55:27,383 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 76 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:27,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 160 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:55:27,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-12-06 18:55:27,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 197. [2021-12-06 18:55:27,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 96 states have (on average 1.3645833333333333) internal successors, (131), 102 states have internal predecessors, (131), 92 states have call successors, (92), 8 states have call predecessors, (92), 8 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2021-12-06 18:55:27,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 315 transitions. [2021-12-06 18:55:27,405 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 315 transitions. Word has length 25 [2021-12-06 18:55:27,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:27,405 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 315 transitions. [2021-12-06 18:55:27,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:55:27,405 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 315 transitions. [2021-12-06 18:55:27,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 18:55:27,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:27,406 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:27,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 18:55:27,406 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:27,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:27,406 INFO L85 PathProgramCache]: Analyzing trace with hash -299150037, now seen corresponding path program 1 times [2021-12-06 18:55:27,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:27,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726921302] [2021-12-06 18:55:27,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:27,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:27,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:55:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:27,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:55:27,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:27,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 18:55:27,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:55:27,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:27,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726921302] [2021-12-06 18:55:27,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726921302] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:55:27,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:55:27,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:55:27,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206848878] [2021-12-06 18:55:27,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:55:27,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:55:27,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:27,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:55:27,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:55:27,452 INFO L87 Difference]: Start difference. First operand 197 states and 315 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:55:27,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:27,557 INFO L93 Difference]: Finished difference Result 291 states and 471 transitions. [2021-12-06 18:55:27,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:55:27,558 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-12-06 18:55:27,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:27,561 INFO L225 Difference]: With dead ends: 291 [2021-12-06 18:55:27,561 INFO L226 Difference]: Without dead ends: 289 [2021-12-06 18:55:27,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:55:27,562 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 24 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:27,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 239 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:55:27,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-12-06 18:55:27,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 269. [2021-12-06 18:55:27,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 118 states have (on average 1.3644067796610169) internal successors, (161), 132 states have internal predecessors, (161), 140 states have call successors, (140), 10 states have call predecessors, (140), 10 states have return successors, (140), 126 states have call predecessors, (140), 140 states have call successors, (140) [2021-12-06 18:55:27,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 441 transitions. [2021-12-06 18:55:27,588 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 441 transitions. Word has length 26 [2021-12-06 18:55:27,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:27,588 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 441 transitions. [2021-12-06 18:55:27,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:55:27,588 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 441 transitions. [2021-12-06 18:55:27,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 18:55:27,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:27,589 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:27,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 18:55:27,590 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:27,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:27,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1714235681, now seen corresponding path program 1 times [2021-12-06 18:55:27,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:27,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442198026] [2021-12-06 18:55:27,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:27,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:27,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:55:27,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:27,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:55:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:27,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:55:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:27,648 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:55:27,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:27,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442198026] [2021-12-06 18:55:27,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442198026] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:55:27,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:55:27,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:55:27,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856888416] [2021-12-06 18:55:27,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:55:27,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:55:27,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:27,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:55:27,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:55:27,650 INFO L87 Difference]: Start difference. First operand 269 states and 441 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:55:27,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:27,762 INFO L93 Difference]: Finished difference Result 317 states and 516 transitions. [2021-12-06 18:55:27,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:55:27,762 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-12-06 18:55:27,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:27,764 INFO L225 Difference]: With dead ends: 317 [2021-12-06 18:55:27,764 INFO L226 Difference]: Without dead ends: 315 [2021-12-06 18:55:27,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:55:27,765 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 71 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:27,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 233 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:55:27,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-12-06 18:55:27,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 287. [2021-12-06 18:55:27,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 125 states have (on average 1.36) internal successors, (170), 141 states have internal predecessors, (170), 150 states have call successors, (150), 11 states have call predecessors, (150), 11 states have return successors, (150), 134 states have call predecessors, (150), 150 states have call successors, (150) [2021-12-06 18:55:27,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 470 transitions. [2021-12-06 18:55:27,796 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 470 transitions. Word has length 28 [2021-12-06 18:55:27,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:27,796 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 470 transitions. [2021-12-06 18:55:27,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 18:55:27,796 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 470 transitions. [2021-12-06 18:55:27,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 18:55:27,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:27,797 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:27,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 18:55:27,797 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:27,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:27,798 INFO L85 PathProgramCache]: Analyzing trace with hash 523331784, now seen corresponding path program 1 times [2021-12-06 18:55:27,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:27,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457463060] [2021-12-06 18:55:27,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:27,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:27,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:55:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:27,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:55:27,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:27,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 18:55:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:27,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 18:55:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:27,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 18:55:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 18:55:27,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:27,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457463060] [2021-12-06 18:55:27,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457463060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:55:27,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:55:27,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:55:27,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948844533] [2021-12-06 18:55:27,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:55:27,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:55:27,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:27,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:55:27,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:55:27,855 INFO L87 Difference]: Start difference. First operand 287 states and 470 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:55:27,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:27,989 INFO L93 Difference]: Finished difference Result 329 states and 527 transitions. [2021-12-06 18:55:27,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:55:27,990 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2021-12-06 18:55:27,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:27,993 INFO L225 Difference]: With dead ends: 329 [2021-12-06 18:55:27,993 INFO L226 Difference]: Without dead ends: 327 [2021-12-06 18:55:27,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:55:27,994 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 34 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:27,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 274 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:55:27,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-06 18:55:28,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 291. [2021-12-06 18:55:28,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 128 states have (on average 1.3515625) internal successors, (173), 144 states have internal predecessors, (173), 150 states have call successors, (150), 12 states have call predecessors, (150), 12 states have return successors, (150), 134 states have call predecessors, (150), 150 states have call successors, (150) [2021-12-06 18:55:28,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 473 transitions. [2021-12-06 18:55:28,031 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 473 transitions. Word has length 38 [2021-12-06 18:55:28,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:28,031 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 473 transitions. [2021-12-06 18:55:28,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:55:28,031 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 473 transitions. [2021-12-06 18:55:28,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 18:55:28,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:28,032 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:28,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 18:55:28,033 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:28,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:28,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1856149802, now seen corresponding path program 1 times [2021-12-06 18:55:28,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:28,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334317677] [2021-12-06 18:55:28,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:28,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:28,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:55:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:28,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:55:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:28,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 18:55:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:28,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:55:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 18:55:28,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:28,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334317677] [2021-12-06 18:55:28,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334317677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:55:28,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:55:28,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:55:28,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313994666] [2021-12-06 18:55:28,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:55:28,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:55:28,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:28,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:55:28,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:55:28,086 INFO L87 Difference]: Start difference. First operand 291 states and 473 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 18:55:28,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:28,173 INFO L93 Difference]: Finished difference Result 297 states and 478 transitions. [2021-12-06 18:55:28,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:55:28,173 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2021-12-06 18:55:28,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:28,176 INFO L225 Difference]: With dead ends: 297 [2021-12-06 18:55:28,176 INFO L226 Difference]: Without dead ends: 295 [2021-12-06 18:55:28,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:55:28,177 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 29 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:28,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 133 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:55:28,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-12-06 18:55:28,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2021-12-06 18:55:28,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 131 states have (on average 1.3435114503816794) internal successors, (176), 147 states have internal predecessors, (176), 150 states have call successors, (150), 13 states have call predecessors, (150), 13 states have return successors, (150), 134 states have call predecessors, (150), 150 states have call successors, (150) [2021-12-06 18:55:28,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 476 transitions. [2021-12-06 18:55:28,203 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 476 transitions. Word has length 38 [2021-12-06 18:55:28,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:28,204 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 476 transitions. [2021-12-06 18:55:28,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 18:55:28,204 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 476 transitions. [2021-12-06 18:55:28,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 18:55:28,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:28,205 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:28,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 18:55:28,205 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:28,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:28,206 INFO L85 PathProgramCache]: Analyzing trace with hash 2019762676, now seen corresponding path program 1 times [2021-12-06 18:55:28,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:28,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653882486] [2021-12-06 18:55:28,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:28,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:28,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:55:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:28,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:55:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:28,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 18:55:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:28,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:55:28,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:28,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:55:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:28,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:55:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 18:55:28,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:28,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653882486] [2021-12-06 18:55:28,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653882486] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:55:28,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:55:28,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:55:28,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974059225] [2021-12-06 18:55:28,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:55:28,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:55:28,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:28,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:55:28,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:55:28,263 INFO L87 Difference]: Start difference. First operand 295 states and 476 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 18:55:28,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:28,379 INFO L93 Difference]: Finished difference Result 329 states and 525 transitions. [2021-12-06 18:55:28,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:55:28,380 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 50 [2021-12-06 18:55:28,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:28,383 INFO L225 Difference]: With dead ends: 329 [2021-12-06 18:55:28,383 INFO L226 Difference]: Without dead ends: 327 [2021-12-06 18:55:28,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:55:28,384 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 42 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:28,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 259 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:55:28,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-06 18:55:28,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 174. [2021-12-06 18:55:28,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 93 states have internal predecessors, (108), 76 states have call successors, (76), 12 states have call predecessors, (76), 12 states have return successors, (76), 68 states have call predecessors, (76), 76 states have call successors, (76) [2021-12-06 18:55:28,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 260 transitions. [2021-12-06 18:55:28,415 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 260 transitions. Word has length 50 [2021-12-06 18:55:28,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:28,415 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 260 transitions. [2021-12-06 18:55:28,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 18:55:28,415 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 260 transitions. [2021-12-06 18:55:28,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 18:55:28,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:28,417 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:28,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 18:55:28,417 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:28,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:28,418 INFO L85 PathProgramCache]: Analyzing trace with hash -2077570128, now seen corresponding path program 1 times [2021-12-06 18:55:28,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:28,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105278095] [2021-12-06 18:55:28,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:28,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:28,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:55:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:28,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:55:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:28,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:55:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:28,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:55:28,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:28,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 18:55:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:28,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:55:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:28,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:55:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:28,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 18:55:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-06 18:55:28,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:28,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105278095] [2021-12-06 18:55:28,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105278095] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:55:28,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908492209] [2021-12-06 18:55:28,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:28,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:28,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:55:28,490 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:55:28,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:55:28,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:28,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 18:55:28,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:55:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-06 18:55:28,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:55:28,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908492209] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:55:28,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:55:28,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-12-06 18:55:28,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5016618] [2021-12-06 18:55:28,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:55:28,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:55:28,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:28,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:55:28,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:55:28,810 INFO L87 Difference]: Start difference. First operand 174 states and 260 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 18:55:28,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:28,955 INFO L93 Difference]: Finished difference Result 505 states and 801 transitions. [2021-12-06 18:55:28,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:55:28,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 58 [2021-12-06 18:55:28,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:28,958 INFO L225 Difference]: With dead ends: 505 [2021-12-06 18:55:28,958 INFO L226 Difference]: Without dead ends: 335 [2021-12-06 18:55:28,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:55:28,959 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 35 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:28,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 219 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:55:28,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-12-06 18:55:29,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 311. [2021-12-06 18:55:29,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 136 states have (on average 1.3455882352941178) internal successors, (183), 152 states have internal predecessors, (183), 162 states have call successors, (162), 12 states have call predecessors, (162), 12 states have return successors, (162), 146 states have call predecessors, (162), 162 states have call successors, (162) [2021-12-06 18:55:29,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 507 transitions. [2021-12-06 18:55:29,013 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 507 transitions. Word has length 58 [2021-12-06 18:55:29,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:29,013 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 507 transitions. [2021-12-06 18:55:29,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 18:55:29,014 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 507 transitions. [2021-12-06 18:55:29,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-06 18:55:29,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:29,016 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 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] [2021-12-06 18:55:29,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:55:29,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 18:55:29,217 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:29,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:29,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1244619342, now seen corresponding path program 1 times [2021-12-06 18:55:29,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:29,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070526745] [2021-12-06 18:55:29,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:29,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:29,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:29,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:55:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:29,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:55:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:29,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 18:55:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:29,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 18:55:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:29,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 18:55:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:29,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:55:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:29,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:55:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:29,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 18:55:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:29,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:55:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:29,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:55:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:29,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 18:55:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:29,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:55:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-12-06 18:55:29,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:29,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070526745] [2021-12-06 18:55:29,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070526745] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:55:29,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900538670] [2021-12-06 18:55:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:29,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:29,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:55:29,310 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:55:29,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:55:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:29,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 18:55:29,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:55:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-12-06 18:55:29,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:55:29,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900538670] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:55:29,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:55:29,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-06 18:55:29,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964737385] [2021-12-06 18:55:29,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:55:29,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:55:29,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:29,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:55:29,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:55:29,770 INFO L87 Difference]: Start difference. First operand 311 states and 507 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 18:55:30,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:30,002 INFO L93 Difference]: Finished difference Result 579 states and 926 transitions. [2021-12-06 18:55:30,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:55:30,003 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 80 [2021-12-06 18:55:30,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:30,005 INFO L225 Difference]: With dead ends: 579 [2021-12-06 18:55:30,006 INFO L226 Difference]: Without dead ends: 303 [2021-12-06 18:55:30,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:55:30,008 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 29 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:30,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 261 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:55:30,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-12-06 18:55:30,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 267. [2021-12-06 18:55:30,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 124 states have (on average 1.314516129032258) internal successors, (163), 136 states have internal predecessors, (163), 130 states have call successors, (130), 12 states have call predecessors, (130), 12 states have return successors, (130), 118 states have call predecessors, (130), 130 states have call successors, (130) [2021-12-06 18:55:30,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 423 transitions. [2021-12-06 18:55:30,053 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 423 transitions. Word has length 80 [2021-12-06 18:55:30,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:30,053 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 423 transitions. [2021-12-06 18:55:30,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 18:55:30,053 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 423 transitions. [2021-12-06 18:55:30,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-06 18:55:30,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:30,055 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 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] [2021-12-06 18:55:30,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:55:30,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 18:55:30,257 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:30,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:30,259 INFO L85 PathProgramCache]: Analyzing trace with hash 293720688, now seen corresponding path program 1 times [2021-12-06 18:55:30,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:30,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578228183] [2021-12-06 18:55:30,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:30,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:30,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:55:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:30,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:55:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:30,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 18:55:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:30,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 18:55:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:30,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 18:55:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:30,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:55:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:30,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:55:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:30,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 18:55:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:30,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:55:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:30,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:55:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:30,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 18:55:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:30,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:55:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-12-06 18:55:30,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:30,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578228183] [2021-12-06 18:55:30,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578228183] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:55:30,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695295811] [2021-12-06 18:55:30,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:30,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:30,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:55:30,450 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:55:30,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:55:30,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:30,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 18:55:30,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:55:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-12-06 18:55:30,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:55:30,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695295811] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:55:30,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:55:30,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-12-06 18:55:30,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263027582] [2021-12-06 18:55:30,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:55:30,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:55:30,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:30,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:55:30,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:55:30,780 INFO L87 Difference]: Start difference. First operand 267 states and 423 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 18:55:30,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:30,928 INFO L93 Difference]: Finished difference Result 497 states and 780 transitions. [2021-12-06 18:55:30,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:55:30,929 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 80 [2021-12-06 18:55:30,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:30,931 INFO L225 Difference]: With dead ends: 497 [2021-12-06 18:55:30,931 INFO L226 Difference]: Without dead ends: 221 [2021-12-06 18:55:30,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:55:30,934 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 20 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:30,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 240 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:55:30,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-06 18:55:30,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 210. [2021-12-06 18:55:30,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 99 states have (on average 1.2828282828282829) internal successors, (127), 109 states have internal predecessors, (127), 98 states have call successors, (98), 12 states have call predecessors, (98), 12 states have return successors, (98), 88 states have call predecessors, (98), 98 states have call successors, (98) [2021-12-06 18:55:30,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 323 transitions. [2021-12-06 18:55:30,958 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 323 transitions. Word has length 80 [2021-12-06 18:55:30,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:30,959 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 323 transitions. [2021-12-06 18:55:30,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 18:55:30,959 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 323 transitions. [2021-12-06 18:55:30,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 18:55:30,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:30,960 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:30,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:55:31,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 18:55:31,162 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:31,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:31,163 INFO L85 PathProgramCache]: Analyzing trace with hash -493164145, now seen corresponding path program 1 times [2021-12-06 18:55:31,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:31,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937859316] [2021-12-06 18:55:31,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:31,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:31,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:55:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:31,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:55:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:31,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 18:55:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:31,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:55:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:31,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:55:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:31,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:55:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:31,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 18:55:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:31,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:55:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:31,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:55:31,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:31,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 18:55:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:31,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:55:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:31,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 18:55:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-12-06 18:55:31,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:31,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937859316] [2021-12-06 18:55:31,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937859316] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:55:31,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245217210] [2021-12-06 18:55:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:31,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:31,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:55:31,402 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:55:31,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:55:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:31,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 18:55:31,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:55:31,554 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-12-06 18:55:31,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:55:31,692 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-12-06 18:55:31,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245217210] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:55:31,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:55:31,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2021-12-06 18:55:31,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869331340] [2021-12-06 18:55:31,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:55:31,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 18:55:31,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:31,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 18:55:31,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:55:31,695 INFO L87 Difference]: Start difference. First operand 210 states and 323 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 5 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 5 states have call predecessors, (30), 5 states have call successors, (30) [2021-12-06 18:55:32,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:32,511 INFO L93 Difference]: Finished difference Result 512 states and 779 transitions. [2021-12-06 18:55:32,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 18:55:32,512 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 5 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 5 states have call predecessors, (30), 5 states have call successors, (30) Word has length 85 [2021-12-06 18:55:32,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:32,515 INFO L225 Difference]: With dead ends: 512 [2021-12-06 18:55:32,515 INFO L226 Difference]: Without dead ends: 342 [2021-12-06 18:55:32,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=419, Invalid=1221, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 18:55:32,517 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 192 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 644 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 644 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:32,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 825 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [644 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:55:32,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-06 18:55:32,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 228. [2021-12-06 18:55:32,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 109 states have (on average 1.2568807339449541) internal successors, (137), 118 states have internal predecessors, (137), 106 states have call successors, (106), 12 states have call predecessors, (106), 12 states have return successors, (106), 97 states have call predecessors, (106), 106 states have call successors, (106) [2021-12-06 18:55:32,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 349 transitions. [2021-12-06 18:55:32,568 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 349 transitions. Word has length 85 [2021-12-06 18:55:32,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:32,568 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 349 transitions. [2021-12-06 18:55:32,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 5 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 5 states have call predecessors, (30), 5 states have call successors, (30) [2021-12-06 18:55:32,568 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 349 transitions. [2021-12-06 18:55:32,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-06 18:55:32,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:32,570 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 18:55:32,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:55:32,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:32,771 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:32,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:32,771 INFO L85 PathProgramCache]: Analyzing trace with hash -539919791, now seen corresponding path program 1 times [2021-12-06 18:55:32,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:32,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547123025] [2021-12-06 18:55:32,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:32,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:32,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:55:32,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:32,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:55:32,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:32,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 18:55:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:32,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:55:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:32,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:55:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:32,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:55:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:32,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 18:55:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:32,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:55:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:32,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:55:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:32,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 18:55:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:32,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 18:55:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:32,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:55:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:32,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 18:55:32,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:32,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 18:55:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:32,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 18:55:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:32,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 18:55:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:32,869 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-12-06 18:55:32,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:32,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547123025] [2021-12-06 18:55:32,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547123025] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:55:32,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347245944] [2021-12-06 18:55:32,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:32,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:32,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:55:32,871 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:55:32,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:55:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:32,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 18:55:32,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:55:33,266 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 153 proven. 7 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2021-12-06 18:55:33,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:55:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-12-06 18:55:33,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347245944] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:55:33,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:55:33,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2021-12-06 18:55:33,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077876830] [2021-12-06 18:55:33,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:55:33,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 18:55:33,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:33,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 18:55:33,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-12-06 18:55:33,496 INFO L87 Difference]: Start difference. First operand 228 states and 349 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 12 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) [2021-12-06 18:55:41,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:41,665 INFO L93 Difference]: Finished difference Result 1355 states and 2162 transitions. [2021-12-06 18:55:41,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-12-06 18:55:41,666 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 12 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) Word has length 107 [2021-12-06 18:55:41,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:41,671 INFO L225 Difference]: With dead ends: 1355 [2021-12-06 18:55:41,671 INFO L226 Difference]: Without dead ends: 935 [2021-12-06 18:55:41,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10006 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3317, Invalid=23089, Unknown=0, NotChecked=0, Total=26406 [2021-12-06 18:55:41,680 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 1053 mSDsluCounter, 4853 mSDsCounter, 0 mSdLazyCounter, 7052 mSolverCounterSat, 3370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 5502 SdHoareTripleChecker+Invalid, 10422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3370 IncrementalHoareTripleChecker+Valid, 7052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:41,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 5502 Invalid, 10422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3370 Valid, 7052 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-06 18:55:41,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-12-06 18:55:41,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 364. [2021-12-06 18:55:41,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 172 states have (on average 1.2616279069767442) internal successors, (217), 185 states have internal predecessors, (217), 175 states have call successors, (175), 16 states have call predecessors, (175), 16 states have return successors, (175), 162 states have call predecessors, (175), 175 states have call successors, (175) [2021-12-06 18:55:41,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 567 transitions. [2021-12-06 18:55:41,737 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 567 transitions. Word has length 107 [2021-12-06 18:55:41,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:41,737 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 567 transitions. [2021-12-06 18:55:41,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 12 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) [2021-12-06 18:55:41,738 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 567 transitions. [2021-12-06 18:55:41,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 18:55:41,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:41,739 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 18:55:41,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:55:41,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:41,941 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:41,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:41,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1988686597, now seen corresponding path program 1 times [2021-12-06 18:55:41,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:41,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392744776] [2021-12-06 18:55:41,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:41,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:42,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:55:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:42,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:55:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:42,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 18:55:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:42,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:55:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:42,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:55:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:42,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:55:42,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:42,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 18:55:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:42,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:55:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:42,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:55:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:42,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 18:55:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:42,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 18:55:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:42,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:55:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:42,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 18:55:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:42,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 18:55:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:42,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 18:55:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:42,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 18:55:42,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:42,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-06 18:55:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-12-06 18:55:42,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:42,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392744776] [2021-12-06 18:55:42,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392744776] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:55:42,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199109760] [2021-12-06 18:55:42,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:42,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:42,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:55:42,065 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:55:42,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:55:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:42,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 18:55:42,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:55:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-12-06 18:55:42,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:55:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-12-06 18:55:42,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199109760] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:55:42,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:55:42,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2021-12-06 18:55:42,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412756738] [2021-12-06 18:55:42,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:55:42,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 18:55:42,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:42,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 18:55:42,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-12-06 18:55:42,494 INFO L87 Difference]: Start difference. First operand 364 states and 567 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 18 states have internal predecessors, (66), 8 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (47), 8 states have call predecessors, (47), 8 states have call successors, (47) [2021-12-06 18:55:43,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:43,488 INFO L93 Difference]: Finished difference Result 755 states and 1189 transitions. [2021-12-06 18:55:43,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 18:55:43,488 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 18 states have internal predecessors, (66), 8 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (47), 8 states have call predecessors, (47), 8 states have call successors, (47) Word has length 112 [2021-12-06 18:55:43,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:43,492 INFO L225 Difference]: With dead ends: 755 [2021-12-06 18:55:43,492 INFO L226 Difference]: Without dead ends: 632 [2021-12-06 18:55:43,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=472, Invalid=1420, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 18:55:43,494 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 366 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 1022 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 2062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1022 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:43,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 948 Invalid, 2062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1022 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 18:55:43,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-12-06 18:55:43,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 361. [2021-12-06 18:55:43,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 170 states have (on average 1.2705882352941176) internal successors, (216), 186 states have internal predecessors, (216), 171 states have call successors, (171), 19 states have call predecessors, (171), 19 states have return successors, (171), 155 states have call predecessors, (171), 171 states have call successors, (171) [2021-12-06 18:55:43,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 558 transitions. [2021-12-06 18:55:43,543 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 558 transitions. Word has length 112 [2021-12-06 18:55:43,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:43,543 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 558 transitions. [2021-12-06 18:55:43,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 18 states have internal predecessors, (66), 8 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (47), 8 states have call predecessors, (47), 8 states have call successors, (47) [2021-12-06 18:55:43,544 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 558 transitions. [2021-12-06 18:55:43,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-06 18:55:43,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:43,546 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:43,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:55:43,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 18:55:43,746 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:43,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:43,747 INFO L85 PathProgramCache]: Analyzing trace with hash 2043931853, now seen corresponding path program 1 times [2021-12-06 18:55:43,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:43,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842975703] [2021-12-06 18:55:43,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:43,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:55:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:55:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 18:55:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 18:55:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 18:55:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:55:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:55:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 18:55:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:55:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 18:55:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 18:55:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 18:55:43,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 18:55:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 18:55:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 18:55:43,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 18:55:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 18:55:43,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:55:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 18:55:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-06 18:55:43,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-06 18:55:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-06 18:55:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-06 18:55:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-06 18:55:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 73 proven. 13 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2021-12-06 18:55:43,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:43,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842975703] [2021-12-06 18:55:43,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842975703] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:55:43,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222129543] [2021-12-06 18:55:43,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:43,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:43,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:55:43,860 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:55:43,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:55:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:43,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 18:55:43,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:55:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 491 proven. 15 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2021-12-06 18:55:44,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:55:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 69 proven. 17 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2021-12-06 18:55:44,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222129543] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:55:44,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:55:44,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2021-12-06 18:55:44,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109727254] [2021-12-06 18:55:44,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:55:44,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 18:55:44,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:44,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 18:55:44,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-12-06 18:55:44,518 INFO L87 Difference]: Start difference. First operand 361 states and 558 transitions. Second operand has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 14 states have call successors, (74), 3 states have call predecessors, (74), 2 states have return successors, (72), 14 states have call predecessors, (72), 14 states have call successors, (72) [2021-12-06 18:55:46,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:46,572 INFO L93 Difference]: Finished difference Result 943 states and 1482 transitions. [2021-12-06 18:55:46,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-06 18:55:46,573 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 14 states have call successors, (74), 3 states have call predecessors, (74), 2 states have return successors, (72), 14 states have call predecessors, (72), 14 states have call successors, (72) Word has length 151 [2021-12-06 18:55:46,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:46,577 INFO L225 Difference]: With dead ends: 943 [2021-12-06 18:55:46,577 INFO L226 Difference]: Without dead ends: 695 [2021-12-06 18:55:46,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1015, Invalid=3815, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 18:55:46,580 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 270 mSDsluCounter, 1914 mSDsCounter, 0 mSdLazyCounter, 2690 mSolverCounterSat, 1039 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 2160 SdHoareTripleChecker+Invalid, 3729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1039 IncrementalHoareTripleChecker+Valid, 2690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:46,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 2160 Invalid, 3729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1039 Valid, 2690 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 18:55:46,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-12-06 18:55:46,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 547. [2021-12-06 18:55:46,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 249 states have (on average 1.3092369477911647) internal successors, (326), 274 states have internal predecessors, (326), 276 states have call successors, (276), 21 states have call predecessors, (276), 21 states have return successors, (276), 251 states have call predecessors, (276), 276 states have call successors, (276) [2021-12-06 18:55:46,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 878 transitions. [2021-12-06 18:55:46,673 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 878 transitions. Word has length 151 [2021-12-06 18:55:46,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:46,673 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 878 transitions. [2021-12-06 18:55:46,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 14 states have call successors, (74), 3 states have call predecessors, (74), 2 states have return successors, (72), 14 states have call predecessors, (72), 14 states have call successors, (72) [2021-12-06 18:55:46,674 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 878 transitions. [2021-12-06 18:55:46,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-06 18:55:46,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:46,676 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 18:55:46,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 18:55:46,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 18:55:46,878 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:46,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:46,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1363812597, now seen corresponding path program 1 times [2021-12-06 18:55:46,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:46,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854825922] [2021-12-06 18:55:46,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:46,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:46,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:55:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:46,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:55:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:46,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 18:55:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:46,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 18:55:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:46,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 18:55:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:46,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:55:46,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:46,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:55:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:46,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 18:55:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:46,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:55:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:46,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 18:55:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:46,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 18:55:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:46,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 18:55:46,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:46,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 18:55:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:46,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 18:55:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:46,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 18:55:46,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:46,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 18:55:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:46,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 18:55:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:46,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:55:46,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:46,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 18:55:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:46,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-06 18:55:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:46,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-06 18:55:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:46,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-06 18:55:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:46,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-06 18:55:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-06 18:55:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 73 proven. 13 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2021-12-06 18:55:47,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:47,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854825922] [2021-12-06 18:55:47,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854825922] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:55:47,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769989940] [2021-12-06 18:55:47,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:47,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:47,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:55:47,004 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:55:47,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:55:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 18:55:47,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:55:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 73 proven. 13 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2021-12-06 18:55:47,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:55:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 73 proven. 13 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2021-12-06 18:55:47,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769989940] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:55:47,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:55:47,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2021-12-06 18:55:47,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689224374] [2021-12-06 18:55:47,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:55:47,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 18:55:47,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:47,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 18:55:47,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:55:47,307 INFO L87 Difference]: Start difference. First operand 547 states and 878 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 10 states have internal predecessors, (49), 6 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2021-12-06 18:55:47,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:47,521 INFO L93 Difference]: Finished difference Result 591 states and 939 transitions. [2021-12-06 18:55:47,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:55:47,521 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 10 states have internal predecessors, (49), 6 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) Word has length 151 [2021-12-06 18:55:47,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:47,524 INFO L225 Difference]: With dead ends: 591 [2021-12-06 18:55:47,524 INFO L226 Difference]: Without dead ends: 519 [2021-12-06 18:55:47,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 344 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:55:47,525 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 45 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:47,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 369 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:55:47,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-12-06 18:55:47,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 489. [2021-12-06 18:55:47,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 228 states have (on average 1.293859649122807) internal successors, (295), 250 states have internal predecessors, (295), 238 states have call successors, (238), 22 states have call predecessors, (238), 22 states have return successors, (238), 216 states have call predecessors, (238), 238 states have call successors, (238) [2021-12-06 18:55:47,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 771 transitions. [2021-12-06 18:55:47,597 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 771 transitions. Word has length 151 [2021-12-06 18:55:47,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:47,597 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 771 transitions. [2021-12-06 18:55:47,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 10 states have internal predecessors, (49), 6 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2021-12-06 18:55:47,598 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 771 transitions. [2021-12-06 18:55:47,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-12-06 18:55:47,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:47,602 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 35, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:47,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 18:55:47,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 18:55:47,803 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:47,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:47,804 INFO L85 PathProgramCache]: Analyzing trace with hash 2090740703, now seen corresponding path program 2 times [2021-12-06 18:55:47,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:47,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063081787] [2021-12-06 18:55:47,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:47,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:55:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:55:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 18:55:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:55:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:55:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:55:47,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 18:55:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:55:47,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:55:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 18:55:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:55:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 18:55:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 18:55:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 18:55:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 18:55:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 18:55:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:55:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-06 18:55:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-06 18:55:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 18:55:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-06 18:55:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 18:55:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-06 18:55:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-06 18:55:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-06 18:55:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-06 18:55:47,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-06 18:55:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-06 18:55:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-06 18:55:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-06 18:55:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-12-06 18:55:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-12-06 18:55:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-12-06 18:55:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2021-12-06 18:55:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2021-12-06 18:55:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 70 proven. 49 refuted. 0 times theorem prover too weak. 2425 trivial. 0 not checked. [2021-12-06 18:55:47,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:47,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063081787] [2021-12-06 18:55:47,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063081787] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:55:47,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742051080] [2021-12-06 18:55:47,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:55:47,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:47,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:55:47,984 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:55:47,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:55:48,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:55:48,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:55:48,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 18:55:48,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:55:48,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 1243 proven. 33 refuted. 0 times theorem prover too weak. 1268 trivial. 0 not checked. [2021-12-06 18:55:48,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:55:48,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 123 proven. 35 refuted. 0 times theorem prover too weak. 2386 trivial. 0 not checked. [2021-12-06 18:55:48,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742051080] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:55:48,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:55:48,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2021-12-06 18:55:48,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481353511] [2021-12-06 18:55:48,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:55:48,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 18:55:48,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:48,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 18:55:48,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-12-06 18:55:48,752 INFO L87 Difference]: Start difference. First operand 489 states and 771 transitions. Second operand has 25 states, 25 states have (on average 3.88) internal successors, (97), 24 states have internal predecessors, (97), 14 states have call successors, (82), 3 states have call predecessors, (82), 2 states have return successors, (81), 14 states have call predecessors, (81), 14 states have call successors, (81) [2021-12-06 18:55:54,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:54,672 INFO L93 Difference]: Finished difference Result 1646 states and 2663 transitions. [2021-12-06 18:55:54,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-12-06 18:55:54,673 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 24 states have internal predecessors, (97), 14 states have call successors, (82), 3 states have call predecessors, (82), 2 states have return successors, (81), 14 states have call predecessors, (81), 14 states have call successors, (81) Word has length 218 [2021-12-06 18:55:54,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:54,674 INFO L225 Difference]: With dead ends: 1646 [2021-12-06 18:55:54,674 INFO L226 Difference]: Without dead ends: 0 [2021-12-06 18:55:54,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7586 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3283, Invalid=17309, Unknown=0, NotChecked=0, Total=20592 [2021-12-06 18:55:54,683 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 564 mSDsluCounter, 2604 mSDsCounter, 0 mSdLazyCounter, 4409 mSolverCounterSat, 2838 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 3031 SdHoareTripleChecker+Invalid, 7247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2838 IncrementalHoareTripleChecker+Valid, 4409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:54,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 3031 Invalid, 7247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2838 Valid, 4409 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 18:55:54,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-06 18:55:54,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-06 18:55:54,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:54,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-06 18:55:54,684 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 218 [2021-12-06 18:55:54,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:54,684 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 18:55:54,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 24 states have internal predecessors, (97), 14 states have call successors, (82), 3 states have call predecessors, (82), 2 states have return successors, (81), 14 states have call predecessors, (81), 14 states have call successors, (81) [2021-12-06 18:55:54,685 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-06 18:55:54,685 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-06 18:55:54,686 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 18:55:54,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 18:55:54,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a878d267-63b2-4a09-902f-76a4014ba928/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 18:55:54,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-06 18:56:12,161 WARN L227 SmtUtils]: Spent 17.25s on a formula simplification. DAG size of input: 410 DAG size of output: 393 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)