./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sanfoundry_10_ground.c --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_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/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_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/sanfoundry_10_ground.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/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_0603caae-b6c3-4f6d-9493-df13c547bca9/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 2638891780f697dd700286595ba75a607e61cda7473ecc330660e8dbb3e9ba64 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:31:14,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:31:14,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:31:14,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:31:14,721 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:31:14,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:31:14,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:31:14,725 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:31:14,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:31:14,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:31:14,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:31:14,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:31:14,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:31:14,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:31:14,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:31:14,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:31:14,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:31:14,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:31:14,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:31:14,737 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:31:14,739 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:31:14,740 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:31:14,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:31:14,742 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:31:14,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:31:14,745 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:31:14,745 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:31:14,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:31:14,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:31:14,747 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:31:14,747 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:31:14,748 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:31:14,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:31:14,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:31:14,750 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:31:14,750 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:31:14,751 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:31:14,751 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:31:14,751 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:31:14,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:31:14,753 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:31:14,753 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:31:14,770 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:31:14,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:31:14,771 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:31:14,771 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:31:14,772 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:31:14,772 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:31:14,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:31:14,773 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:31:14,773 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:31:14,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:31:14,773 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:31:14,773 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:31:14,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:31:14,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:31:14,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:31:14,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:31:14,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:31:14,774 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:31:14,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:31:14,774 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:31:14,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:31:14,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:31:14,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:31:14,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:31:14,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:31:14,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:31:14,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:31:14,775 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:31:14,775 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:31:14,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:31:14,775 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:31:14,775 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:31:14,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:31:14,776 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:31:14,776 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_0603caae-b6c3-4f6d-9493-df13c547bca9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2638891780f697dd700286595ba75a607e61cda7473ecc330660e8dbb3e9ba64 [2021-12-06 17:31:14,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:31:14,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:31:14,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:31:14,975 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:31:14,976 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:31:14,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-examples/sanfoundry_10_ground.c [2021-12-06 17:31:15,026 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/data/1fc532eb8/60c6619bde624ba5a067c9beb161b5c0/FLAG265006038 [2021-12-06 17:31:15,402 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:31:15,403 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/sv-benchmarks/c/array-examples/sanfoundry_10_ground.c [2021-12-06 17:31:15,407 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/data/1fc532eb8/60c6619bde624ba5a067c9beb161b5c0/FLAG265006038 [2021-12-06 17:31:15,419 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/data/1fc532eb8/60c6619bde624ba5a067c9beb161b5c0 [2021-12-06 17:31:15,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:31:15,422 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:31:15,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:31:15,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:31:15,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:31:15,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:31:15" (1/1) ... [2021-12-06 17:31:15,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ac91486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:31:15, skipping insertion in model container [2021-12-06 17:31:15,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:31:15" (1/1) ... [2021-12-06 17:31:15,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:31:15,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:31:15,553 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_0603caae-b6c3-4f6d-9493-df13c547bca9/sv-benchmarks/c/array-examples/sanfoundry_10_ground.c[324,337] [2021-12-06 17:31:15,566 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:31:15,571 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:31:15,580 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_0603caae-b6c3-4f6d-9493-df13c547bca9/sv-benchmarks/c/array-examples/sanfoundry_10_ground.c[324,337] [2021-12-06 17:31:15,586 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:31:15,595 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:31:15,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:31:15 WrapperNode [2021-12-06 17:31:15,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:31:15,596 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:31:15,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:31:15,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:31:15,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:31:15" (1/1) ... [2021-12-06 17:31:15,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:31:15" (1/1) ... [2021-12-06 17:31:15,621 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2021-12-06 17:31:15,622 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:31:15,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:31:15,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:31:15,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:31:15,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:31:15" (1/1) ... [2021-12-06 17:31:15,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:31:15" (1/1) ... [2021-12-06 17:31:15,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:31:15" (1/1) ... [2021-12-06 17:31:15,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:31:15" (1/1) ... [2021-12-06 17:31:15,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:31:15" (1/1) ... [2021-12-06 17:31:15,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:31:15" (1/1) ... [2021-12-06 17:31:15,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:31:15" (1/1) ... [2021-12-06 17:31:15,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:31:15,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:31:15,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:31:15,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:31:15,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:31:15" (1/1) ... [2021-12-06 17:31:15,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:31:15,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:31:15,668 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:31:15,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:31:15,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:31:15,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:31:15,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 17:31:15,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 17:31:15,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:31:15,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:31:15,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 17:31:15,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 17:31:15,748 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:31:15,749 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:31:15,851 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:31:15,858 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:31:15,858 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-06 17:31:15,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:31:15 BoogieIcfgContainer [2021-12-06 17:31:15,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:31:15,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:31:15,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:31:15,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:31:15,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:31:15" (1/3) ... [2021-12-06 17:31:15,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331d3bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:31:15, skipping insertion in model container [2021-12-06 17:31:15,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:31:15" (2/3) ... [2021-12-06 17:31:15,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331d3bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:31:15, skipping insertion in model container [2021-12-06 17:31:15,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:31:15" (3/3) ... [2021-12-06 17:31:15,868 INFO L111 eAbstractionObserver]: Analyzing ICFG sanfoundry_10_ground.c [2021-12-06 17:31:15,874 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:31:15,874 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:31:15,915 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:31:15,921 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 17:31:15,922 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:31:15,932 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 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 17:31:15,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 17:31:15,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:31:15,937 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:31:15,937 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:31:15,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:31:15,941 INFO L85 PathProgramCache]: Analyzing trace with hash -2044605464, now seen corresponding path program 1 times [2021-12-06 17:31:15,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:31:15,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130736120] [2021-12-06 17:31:15,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:31:15,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:31:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:31:16,087 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 17:31:16,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:31:16,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130736120] [2021-12-06 17:31:16,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130736120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:31:16,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:31:16,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:31:16,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170258871] [2021-12-06 17:31:16,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:31:16,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:31:16,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:31:16,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:31:16,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:31:16,116 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 17:31:16,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:31:16,148 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2021-12-06 17:31:16,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:31:16,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 17:31:16,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:31:16,156 INFO L225 Difference]: With dead ends: 42 [2021-12-06 17:31:16,156 INFO L226 Difference]: Without dead ends: 20 [2021-12-06 17:31:16,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:31:16,161 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:31:16,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 41 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:31:16,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-06 17:31:16,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-12-06 17:31:16,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:31:16,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-12-06 17:31:16,186 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-12-06 17:31:16,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:31:16,186 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-12-06 17:31:16,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 17:31:16,186 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-12-06 17:31:16,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 17:31:16,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:31:16,187 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:31:16,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:31:16,187 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:31:16,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:31:16,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1280243605, now seen corresponding path program 1 times [2021-12-06 17:31:16,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:31:16,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832707604] [2021-12-06 17:31:16,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:31:16,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:31:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:31:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:31:16,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:31:16,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832707604] [2021-12-06 17:31:16,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832707604] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:31:16,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:31:16,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:31:16,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311164637] [2021-12-06 17:31:16,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:31:16,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:31:16,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:31:16,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:31:16,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:31:16,248 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:31:16,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:31:16,280 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2021-12-06 17:31:16,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:31:16,281 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 17:31:16,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:31:16,283 INFO L225 Difference]: With dead ends: 38 [2021-12-06 17:31:16,283 INFO L226 Difference]: Without dead ends: 26 [2021-12-06 17:31:16,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:31:16,285 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:31:16,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:31:16,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-06 17:31:16,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2021-12-06 17:31:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 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 17:31:16,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-12-06 17:31:16,293 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 12 [2021-12-06 17:31:16,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:31:16,293 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-12-06 17:31:16,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:31:16,293 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-12-06 17:31:16,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 17:31:16,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:31:16,294 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:31:16,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:31:16,295 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:31:16,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:31:16,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1442235305, now seen corresponding path program 1 times [2021-12-06 17:31:16,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:31:16,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374814191] [2021-12-06 17:31:16,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:31:16,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:31:16,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:31:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:31:16,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:31:16,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374814191] [2021-12-06 17:31:16,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374814191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:31:16,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:31:16,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:31:16,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089943577] [2021-12-06 17:31:16,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:31:16,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:31:16,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:31:16,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:31:16,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:31:16,345 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:31:16,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:31:16,353 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-12-06 17:31:16,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:31:16,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-06 17:31:16,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:31:16,354 INFO L225 Difference]: With dead ends: 34 [2021-12-06 17:31:16,354 INFO L226 Difference]: Without dead ends: 21 [2021-12-06 17:31:16,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:31:16,356 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:31:16,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 26 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:31:16,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-06 17:31:16,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-06 17:31:16,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:31:16,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-12-06 17:31:16,360 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2021-12-06 17:31:16,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:31:16,360 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-12-06 17:31:16,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:31:16,361 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-12-06 17:31:16,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 17:31:16,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:31:16,361 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:31:16,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 17:31:16,362 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:31:16,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:31:16,362 INFO L85 PathProgramCache]: Analyzing trace with hash 2093661559, now seen corresponding path program 1 times [2021-12-06 17:31:16,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:31:16,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966611377] [2021-12-06 17:31:16,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:31:16,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:31:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:31:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:31:16,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:31:16,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966611377] [2021-12-06 17:31:16,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966611377] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:31:16,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881814176] [2021-12-06 17:31:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:31:16,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:31:16,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:31:16,422 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:31:16,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:31:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:31:16,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:31:16,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:31:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:31:16,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:31:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:31:16,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881814176] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:31:16,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:31:16,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-12-06 17:31:16,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845600292] [2021-12-06 17:31:16,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:31:16,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 17:31:16,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:31:16,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 17:31:16,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:31:16,566 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 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 17:31:16,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:31:16,685 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2021-12-06 17:31:16,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:31:16,685 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 17:31:16,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:31:16,686 INFO L225 Difference]: With dead ends: 84 [2021-12-06 17:31:16,686 INFO L226 Difference]: Without dead ends: 68 [2021-12-06 17:31:16,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:31:16,688 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 72 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:31:16,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 86 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:31:16,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-06 17:31:16,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 37. [2021-12-06 17:31:16,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 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 17:31:16,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-12-06 17:31:16,694 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 16 [2021-12-06 17:31:16,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:31:16,694 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-12-06 17:31:16,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 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 17:31:16,695 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-12-06 17:31:16,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 17:31:16,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:31:16,695 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:31:16,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:31:16,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:31:16,898 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:31:16,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:31:16,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1674724175, now seen corresponding path program 1 times [2021-12-06 17:31:16,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:31:16,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637661322] [2021-12-06 17:31:16,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:31:16,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:31:16,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:31:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 17:31:17,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:31:17,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637661322] [2021-12-06 17:31:17,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637661322] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:31:17,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915285649] [2021-12-06 17:31:17,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:31:17,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:31:17,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:31:17,087 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:31:17,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:31:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:31:17,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:31:17,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:31:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 17:31:17,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:31:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 17:31:17,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915285649] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:31:17,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:31:17,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2021-12-06 17:31:17,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774373824] [2021-12-06 17:31:17,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:31:17,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 17:31:17,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:31:17,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 17:31:17,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=142, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:31:17,269 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 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 17:31:17,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:31:17,315 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2021-12-06 17:31:17,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 17:31:17,316 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-06 17:31:17,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:31:17,316 INFO L225 Difference]: With dead ends: 83 [2021-12-06 17:31:17,316 INFO L226 Difference]: Without dead ends: 57 [2021-12-06 17:31:17,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=142, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:31:17,318 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:31:17,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 80 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:31:17,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-06 17:31:17,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2021-12-06 17:31:17,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 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 17:31:17,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-12-06 17:31:17,324 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 25 [2021-12-06 17:31:17,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:31:17,324 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-12-06 17:31:17,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 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 17:31:17,324 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-12-06 17:31:17,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 17:31:17,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:31:17,325 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:31:17,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:31:17,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:31:17,527 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:31:17,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:31:17,528 INFO L85 PathProgramCache]: Analyzing trace with hash 674415525, now seen corresponding path program 2 times [2021-12-06 17:31:17,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:31:17,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208163966] [2021-12-06 17:31:17,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:31:17,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:31:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:31:17,680 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 17:31:17,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:31:17,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208163966] [2021-12-06 17:31:17,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208163966] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:31:17,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113791436] [2021-12-06 17:31:17,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:31:17,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:31:17,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:31:17,682 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:31:17,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:31:17,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:31:17,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:31:17,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 17:31:17,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:31:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 17:31:17,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:31:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 17:31:18,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113791436] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:31:18,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:31:18,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2021-12-06 17:31:18,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507733912] [2021-12-06 17:31:18,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:31:18,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 17:31:18,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:31:18,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 17:31:18,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=640, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 17:31:18,008 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 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 17:31:18,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:31:18,099 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2021-12-06 17:31:18,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 17:31:18,100 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-06 17:31:18,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:31:18,101 INFO L225 Difference]: With dead ends: 107 [2021-12-06 17:31:18,101 INFO L226 Difference]: Without dead ends: 81 [2021-12-06 17:31:18,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=550, Invalid=640, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 17:31:18,103 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:31:18,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 64 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:31:18,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-06 17:31:18,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2021-12-06 17:31:18,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 72 states have internal predecessors, (77), 0 states have call successors, (0), 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 17:31:18,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2021-12-06 17:31:18,113 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 37 [2021-12-06 17:31:18,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:31:18,114 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2021-12-06 17:31:18,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 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 17:31:18,114 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2021-12-06 17:31:18,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 17:31:18,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:31:18,116 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:31:18,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 17:31:18,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 17:31:18,318 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:31:18,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:31:18,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1755146125, now seen corresponding path program 3 times [2021-12-06 17:31:18,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:31:18,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22507660] [2021-12-06 17:31:18,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:31:18,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:31:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:31:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 17:31:18,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:31:18,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22507660] [2021-12-06 17:31:18,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22507660] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:31:18,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718098955] [2021-12-06 17:31:18,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:31:18,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:31:18,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:31:18,608 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:31:18,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:31:18,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 17:31:18,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:31:18,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:31:18,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:31:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-06 17:31:18,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:31:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-06 17:31:18,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718098955] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:31:18,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:31:18,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 6] total 33 [2021-12-06 17:31:18,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942149563] [2021-12-06 17:31:18,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:31:18,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 17:31:18,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:31:18,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 17:31:18,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=632, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 17:31:18,902 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 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 17:31:20,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:31:20,123 INFO L93 Difference]: Finished difference Result 317 states and 378 transitions. [2021-12-06 17:31:20,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-06 17:31:20,124 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-06 17:31:20,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:31:20,126 INFO L225 Difference]: With dead ends: 317 [2021-12-06 17:31:20,126 INFO L226 Difference]: Without dead ends: 291 [2021-12-06 17:31:20,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2755 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3510, Invalid=7410, Unknown=0, NotChecked=0, Total=10920 [2021-12-06 17:31:20,131 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 597 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:31:20,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 100 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:31:20,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-12-06 17:31:20,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 196. [2021-12-06 17:31:20,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.1487179487179486) internal successors, (224), 195 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:31:20,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 224 transitions. [2021-12-06 17:31:20,153 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 224 transitions. Word has length 61 [2021-12-06 17:31:20,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:31:20,153 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 224 transitions. [2021-12-06 17:31:20,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 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 17:31:20,154 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 224 transitions. [2021-12-06 17:31:20,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 17:31:20,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:31:20,155 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:31:20,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 17:31:20,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:31:20,356 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:31:20,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:31:20,356 INFO L85 PathProgramCache]: Analyzing trace with hash 842992325, now seen corresponding path program 1 times [2021-12-06 17:31:20,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:31:20,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121310862] [2021-12-06 17:31:20,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:31:20,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:31:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:31:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 17:31:20,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:31:20,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121310862] [2021-12-06 17:31:20,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121310862] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:31:20,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619609601] [2021-12-06 17:31:20,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:31:20,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:31:20,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:31:20,641 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:31:20,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:31:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:31:20,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 17:31:20,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:31:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 17:31:21,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:31:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 17:31:21,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619609601] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:31:21,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:31:21,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 80 [2021-12-06 17:31:21,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653469222] [2021-12-06 17:31:21,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:31:21,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-06 17:31:21,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:31:21,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-06 17:31:21,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2860, Invalid=3460, Unknown=0, NotChecked=0, Total=6320 [2021-12-06 17:31:21,619 INFO L87 Difference]: Start difference. First operand 196 states and 224 transitions. Second operand has 80 states, 80 states have (on average 2.1375) internal successors, (171), 80 states have internal predecessors, (171), 0 states have call successors, (0), 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 17:31:21,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:31:21,753 INFO L93 Difference]: Finished difference Result 402 states and 485 transitions. [2021-12-06 17:31:21,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 17:31:21,753 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.1375) internal successors, (171), 80 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-06 17:31:21,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:31:21,754 INFO L225 Difference]: With dead ends: 402 [2021-12-06 17:31:21,755 INFO L226 Difference]: Without dead ends: 259 [2021-12-06 17:31:21,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2624 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2860, Invalid=3460, Unknown=0, NotChecked=0, Total=6320 [2021-12-06 17:31:21,757 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 114 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:31:21,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 86 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:31:21,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-12-06 17:31:21,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 250. [2021-12-06 17:31:21,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.1164658634538152) internal successors, (278), 249 states have internal predecessors, (278), 0 states have call successors, (0), 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 17:31:21,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 278 transitions. [2021-12-06 17:31:21,773 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 278 transitions. Word has length 72 [2021-12-06 17:31:21,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:31:21,773 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 278 transitions. [2021-12-06 17:31:21,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.1375) internal successors, (171), 80 states have internal predecessors, (171), 0 states have call successors, (0), 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 17:31:21,773 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 278 transitions. [2021-12-06 17:31:21,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-06 17:31:21,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:31:21,775 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:31:21,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 17:31:21,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:31:21,976 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:31:21,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:31:21,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1201235067, now seen corresponding path program 2 times [2021-12-06 17:31:21,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:31:21,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613985330] [2021-12-06 17:31:21,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:31:21,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:31:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:31:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2717 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 17:31:22,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:31:22,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613985330] [2021-12-06 17:31:22,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613985330] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:31:22,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336108795] [2021-12-06 17:31:22,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:31:22,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:31:22,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:31:22,765 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:31:22,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 17:31:22,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:31:22,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:31:22,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 17:31:22,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:31:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2717 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 17:31:23,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:31:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2717 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 17:31:25,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336108795] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:31:25,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:31:25,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 161 [2021-12-06 17:31:25,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060932602] [2021-12-06 17:31:25,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:31:25,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2021-12-06 17:31:25,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:31:25,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2021-12-06 17:31:25,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11554, Invalid=14206, Unknown=0, NotChecked=0, Total=25760 [2021-12-06 17:31:25,846 INFO L87 Difference]: Start difference. First operand 250 states and 278 transitions. Second operand has 161 states, 161 states have (on average 2.0683229813664594) internal successors, (333), 161 states have internal predecessors, (333), 0 states have call successors, (0), 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 17:31:26,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:31:26,165 INFO L93 Difference]: Finished difference Result 510 states and 620 transitions. [2021-12-06 17:31:26,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-12-06 17:31:26,165 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 2.0683229813664594) internal successors, (333), 161 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-12-06 17:31:26,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:31:26,167 INFO L225 Difference]: With dead ends: 510 [2021-12-06 17:31:26,167 INFO L226 Difference]: Without dead ends: 367 [2021-12-06 17:31:26,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11075 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=11554, Invalid=14206, Unknown=0, NotChecked=0, Total=25760 [2021-12-06 17:31:26,171 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 222 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:31:26,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 68 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:31:26,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-12-06 17:31:26,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 358. [2021-12-06 17:31:26,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.0812324929971988) internal successors, (386), 357 states have internal predecessors, (386), 0 states have call successors, (0), 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 17:31:26,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 386 transitions. [2021-12-06 17:31:26,186 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 386 transitions. Word has length 126 [2021-12-06 17:31:26,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:31:26,186 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 386 transitions. [2021-12-06 17:31:26,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 2.0683229813664594) internal successors, (333), 161 states have internal predecessors, (333), 0 states have call successors, (0), 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 17:31:26,187 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 386 transitions. [2021-12-06 17:31:26,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-06 17:31:26,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:31:26,190 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:31:26,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-06 17:31:26,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:31:26,391 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:31:26,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:31:26,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1368520089, now seen corresponding path program 3 times [2021-12-06 17:31:26,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:31:26,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020512139] [2021-12-06 17:31:26,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:31:26,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:31:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:31:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11249 backedges. 0 proven. 11236 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 17:31:29,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:31:29,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020512139] [2021-12-06 17:31:29,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020512139] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:31:29,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226161972] [2021-12-06 17:31:29,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:31:29,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:31:29,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:31:29,242 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:31:29,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 17:31:29,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 17:31:29,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:31:29,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 17:31:29,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:31:29,924 INFO L354 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2021-12-06 17:31:29,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2021-12-06 17:31:30,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11249 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11243 trivial. 0 not checked. [2021-12-06 17:31:30,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:31:32,451 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (< (+ 2 |ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~n~0#1|) (forall ((v_ArrVal_932 Int)) (not (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) v_ArrVal_932) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|))))) is different from false [2021-12-06 17:32:26,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-12-06 17:32:26,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:32:26,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 36 [2021-12-06 17:32:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11249 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11243 trivial. 6 not checked. [2021-12-06 17:32:27,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226161972] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:32:27,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:32:27,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 11, 11] total 126 [2021-12-06 17:32:27,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124423058] [2021-12-06 17:32:27,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:32:27,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2021-12-06 17:32:27,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:32:27,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-12-06 17:32:27,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6285, Invalid=9107, Unknown=112, NotChecked=246, Total=15750 [2021-12-06 17:32:27,311 INFO L87 Difference]: Start difference. First operand 358 states and 386 transitions. Second operand has 126 states, 126 states have (on average 2.111111111111111) internal successors, (266), 126 states have internal predecessors, (266), 0 states have call successors, (0), 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 17:32:33,572 WARN L838 $PredicateComparison]: unable to prove that (and (<= 100000 |c_ULTIMATE.start_main_~n~0#1|) (= |c_ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (< (+ 2 |ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~n~0#1|) (forall ((v_ArrVal_932 Int)) (not (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) v_ArrVal_932) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|))))) (= |c_ULTIMATE.start_main_~i~0#1| 0) (not (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|))) is different from false [2021-12-06 17:32:35,583 WARN L838 $PredicateComparison]: unable to prove that (and (<= 100000 |c_ULTIMATE.start_main_~n~0#1|) (= |c_ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (< (+ 2 |ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~n~0#1|) (forall ((v_ArrVal_932 Int)) (not (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) v_ArrVal_932) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|))))) (not (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|))) is different from false [2021-12-06 17:32:35,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:32:35,811 INFO L93 Difference]: Finished difference Result 548 states and 612 transitions. [2021-12-06 17:32:35,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-12-06 17:32:35,812 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.111111111111111) internal successors, (266), 126 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2021-12-06 17:32:35,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:32:35,814 INFO L225 Difference]: With dead ends: 548 [2021-12-06 17:32:35,814 INFO L226 Difference]: Without dead ends: 405 [2021-12-06 17:32:35,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 450 SyntacticMatches, 1 SemanticMatches, 240 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 8144 ImplicationChecksByTransitivity, 67.6s TimeCoverageRelationStatistics Valid=19234, Invalid=37546, Unknown=114, NotChecked=1428, Total=58322 [2021-12-06 17:32:35,819 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 424 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:32:35,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 101 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 409 Invalid, 0 Unknown, 80 Unchecked, 0.3s Time] [2021-12-06 17:32:35,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-12-06 17:32:35,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 378. [2021-12-06 17:32:35,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.0928381962864722) internal successors, (412), 377 states have internal predecessors, (412), 0 states have call successors, (0), 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 17:32:35,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 412 transitions. [2021-12-06 17:32:35,836 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 412 transitions. Word has length 234 [2021-12-06 17:32:35,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:32:35,836 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 412 transitions. [2021-12-06 17:32:35,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.111111111111111) internal successors, (266), 126 states have internal predecessors, (266), 0 states have call successors, (0), 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 17:32:35,837 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 412 transitions. [2021-12-06 17:32:35,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-06 17:32:35,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:32:35,839 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:32:35,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 17:32:36,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 17:32:36,040 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:32:36,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:32:36,040 INFO L85 PathProgramCache]: Analyzing trace with hash 763782623, now seen corresponding path program 1 times [2021-12-06 17:32:36,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:32:36,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727157171] [2021-12-06 17:32:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:32:36,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:32:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:32:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11464 backedges. 0 proven. 11449 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 17:32:39,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:32:39,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727157171] [2021-12-06 17:32:39,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727157171] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:32:39,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231799208] [2021-12-06 17:32:39,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:32:39,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:32:39,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:32:39,023 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:32:39,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 17:32:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:32:39,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 110 conjunts are in the unsatisfiable core [2021-12-06 17:32:39,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:32:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11464 backedges. 0 proven. 11449 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 17:32:42,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:32:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 11464 backedges. 0 proven. 11449 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 17:32:50,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231799208] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:32:50,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:32:50,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110, 110] total 326 [2021-12-06 17:32:50,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809755336] [2021-12-06 17:32:50,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:32:50,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 326 states [2021-12-06 17:32:50,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:32:50,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 326 interpolants. [2021-12-06 17:32:50,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47304, Invalid=58646, Unknown=0, NotChecked=0, Total=105950 [2021-12-06 17:32:50,816 INFO L87 Difference]: Start difference. First operand 378 states and 412 transitions. Second operand has 326 states, 326 states have (on average 2.042944785276074) internal successors, (666), 326 states have internal predecessors, (666), 0 states have call successors, (0), 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 17:32:52,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:32:52,338 INFO L93 Difference]: Finished difference Result 753 states and 925 transitions. [2021-12-06 17:32:52,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2021-12-06 17:32:52,339 INFO L78 Accepts]: Start accepts. Automaton has has 326 states, 326 states have (on average 2.042944785276074) internal successors, (666), 326 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 240 [2021-12-06 17:32:52,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:32:52,341 INFO L225 Difference]: With dead ends: 753 [2021-12-06 17:32:52,341 INFO L226 Difference]: Without dead ends: 596 [2021-12-06 17:32:52,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46330 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=47304, Invalid=58646, Unknown=0, NotChecked=0, Total=105950 [2021-12-06 17:32:52,349 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 334 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:32:52,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 103 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 17:32:52,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-12-06 17:32:52,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 589. [2021-12-06 17:32:52,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 1.0561224489795917) internal successors, (621), 588 states have internal predecessors, (621), 0 states have call successors, (0), 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 17:32:52,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 621 transitions. [2021-12-06 17:32:52,369 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 621 transitions. Word has length 240 [2021-12-06 17:32:52,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:32:52,370 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 621 transitions. [2021-12-06 17:32:52,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 326 states, 326 states have (on average 2.042944785276074) internal successors, (666), 326 states have internal predecessors, (666), 0 states have call successors, (0), 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 17:32:52,370 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 621 transitions. [2021-12-06 17:32:52,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-12-06 17:32:52,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:32:52,376 INFO L514 BasicCegarLoop]: trace histogram [216, 216, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:32:52,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 17:32:52,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:32:52,578 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:32:52,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:32:52,579 INFO L85 PathProgramCache]: Analyzing trace with hash 654572729, now seen corresponding path program 2 times [2021-12-06 17:32:52,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:32:52,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852104890] [2021-12-06 17:32:52,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:32:52,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:32:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:33:03,731 INFO L134 CoverageAnalysis]: Checked inductivity of 46671 backedges. 0 proven. 46656 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 17:33:03,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:33:03,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852104890] [2021-12-06 17:33:03,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852104890] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:33:03,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880985995] [2021-12-06 17:33:03,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:33:03,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:33:03,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:33:03,732 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:33:03,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 17:33:03,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:33:03,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:33:04,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 2057 conjuncts, 219 conjunts are in the unsatisfiable core [2021-12-06 17:33:04,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:33:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 46671 backedges. 0 proven. 46656 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 17:33:15,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:33:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 46671 backedges. 0 proven. 46656 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 17:33:48,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880985995] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:33:48,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:33:48,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [219, 219, 219] total 653 [2021-12-06 17:33:48,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035222455] [2021-12-06 17:33:48,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:33:48,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 653 states [2021-12-06 17:33:48,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:33:48,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 653 interpolants. [2021-12-06 17:33:48,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189658, Invalid=236098, Unknown=0, NotChecked=0, Total=425756 [2021-12-06 17:33:48,464 INFO L87 Difference]: Start difference. First operand 589 states and 621 transitions. Second operand has 653 states, 653 states have (on average 2.021439509954058) internal successors, (1320), 653 states have internal predecessors, (1320), 0 states have call successors, (0), 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 17:33:56,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:33:56,622 INFO L93 Difference]: Finished difference Result 1186 states and 1467 transitions. [2021-12-06 17:33:56,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 436 states. [2021-12-06 17:33:56,624 INFO L78 Accepts]: Start accepts. Automaton has has 653 states, 653 states have (on average 2.021439509954058) internal successors, (1320), 653 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-12-06 17:33:56,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:33:56,628 INFO L225 Difference]: With dead ends: 1186 [2021-12-06 17:33:56,628 INFO L226 Difference]: Without dead ends: 1032 [2021-12-06 17:33:56,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1133 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 651 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187703 ImplicationChecksByTransitivity, 53.4s TimeCoverageRelationStatistics Valid=189658, Invalid=236098, Unknown=0, NotChecked=0, Total=425756 [2021-12-06 17:33:56,650 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 661 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:33:56,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 60 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 17:33:56,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-12-06 17:33:56,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 1025. [2021-12-06 17:33:56,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 1.0322265625) internal successors, (1057), 1024 states have internal predecessors, (1057), 0 states have call successors, (0), 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 17:33:56,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1057 transitions. [2021-12-06 17:33:56,682 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1057 transitions. Word has length 458 [2021-12-06 17:33:56,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:33:56,682 INFO L470 AbstractCegarLoop]: Abstraction has 1025 states and 1057 transitions. [2021-12-06 17:33:56,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 653 states, 653 states have (on average 2.021439509954058) internal successors, (1320), 653 states have internal predecessors, (1320), 0 states have call successors, (0), 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 17:33:56,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1057 transitions. [2021-12-06 17:33:56,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 895 [2021-12-06 17:33:56,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:33:56,700 INFO L514 BasicCegarLoop]: trace histogram [434, 434, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:33:56,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 17:33:56,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 17:33:56,902 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:33:56,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:33:56,904 INFO L85 PathProgramCache]: Analyzing trace with hash 325960941, now seen corresponding path program 3 times [2021-12-06 17:33:56,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:33:56,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998264041] [2021-12-06 17:33:56,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:33:56,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:33:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 188371 backedges. 0 proven. 188356 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 17:34:41,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:41,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998264041] [2021-12-06 17:34:41,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998264041] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:34:41,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7050946] [2021-12-06 17:34:41,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:34:41,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:34:41,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:34:41,306 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:34:41,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0603caae-b6c3-4f6d-9493-df13c547bca9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 17:34:41,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 17:34:41,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:34:41,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 17:34:41,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:34:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 188371 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 188358 trivial. 0 not checked. [2021-12-06 17:34:42,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:34:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 188371 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 188358 trivial. 0 not checked. [2021-12-06 17:34:44,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7050946] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:34:44,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:34:44,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [437, 8, 8] total 449 [2021-12-06 17:34:44,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225897768] [2021-12-06 17:34:44,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:34:44,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 449 states [2021-12-06 17:34:44,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:44,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 449 interpolants. [2021-12-06 17:34:44,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98809, Invalid=102343, Unknown=0, NotChecked=0, Total=201152 [2021-12-06 17:34:44,555 INFO L87 Difference]: Start difference. First operand 1025 states and 1057 transitions. Second operand has 449 states, 449 states have (on average 2.062360801781737) internal successors, (926), 449 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)