./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label09.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label09.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU --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 7e1c4d2c7e091760d0cfd2192761696664946c8a36300f0a25d92c3977c93680 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:06:01,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:06:01,600 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:06:01,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:06:01,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:06:01,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:06:01,672 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:06:01,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:06:01,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:06:01,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:06:01,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:06:01,692 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:06:01,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:06:01,696 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:06:01,699 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:06:01,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:06:01,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:06:01,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:06:01,711 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:06:01,718 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:06:01,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:06:01,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:06:01,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:06:01,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:06:01,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:06:01,734 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:06:01,735 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:06:01,737 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:06:01,738 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:06:01,739 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:06:01,740 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:06:01,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:06:01,743 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:06:01,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:06:01,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:06:01,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:06:01,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:06:01,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:06:01,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:06:01,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:06:01,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:06:01,751 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:06:01,799 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:06:01,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:06:01,821 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:06:01,821 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:06:01,829 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:06:01,829 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:06:01,829 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:06:01,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:06:01,830 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:06:01,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:06:01,832 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:06:01,832 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:06:01,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:06:01,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:06:01,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:06:01,833 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:06:01,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:06:01,833 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:06:01,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:06:01,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:06:01,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:06:01,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:06:01,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:06:01,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:06:01,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:06:01,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:06:01,836 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:06:01,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:06:01,836 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:06:01,838 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:06:01,838 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:06:01,838 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:06:01,839 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_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e1c4d2c7e091760d0cfd2192761696664946c8a36300f0a25d92c3977c93680 [2021-11-02 23:06:02,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:06:02,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:06:02,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:06:02,222 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:06:02,222 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:06:02,224 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/eca-rers2012/Problem17_label09.c [2021-11-02 23:06:02,303 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/data/0e129450c/2dd030f42d434d1fa49b8d4fd9ccc908/FLAG3dab0dd73 [2021-11-02 23:06:03,173 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:06:03,175 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/sv-benchmarks/c/eca-rers2012/Problem17_label09.c [2021-11-02 23:06:03,213 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/data/0e129450c/2dd030f42d434d1fa49b8d4fd9ccc908/FLAG3dab0dd73 [2021-11-02 23:06:03,241 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/data/0e129450c/2dd030f42d434d1fa49b8d4fd9ccc908 [2021-11-02 23:06:03,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:06:03,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:06:03,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:06:03,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:06:03,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:06:03,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:06:03" (1/1) ... [2021-11-02 23:06:03,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64f70d89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:03, skipping insertion in model container [2021-11-02 23:06:03,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:06:03" (1/1) ... [2021-11-02 23:06:03,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:06:03,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:06:03,595 WARN L228 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_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/sv-benchmarks/c/eca-rers2012/Problem17_label09.c[1938,1951] [2021-11-02 23:06:04,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:06:04,517 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:06:04,551 WARN L228 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_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/sv-benchmarks/c/eca-rers2012/Problem17_label09.c[1938,1951] [2021-11-02 23:06:04,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:06:04,969 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:06:04,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:04 WrapperNode [2021-11-02 23:06:04,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:06:04,972 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:06:04,973 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:06:04,973 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:06:04,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:04" (1/1) ... [2021-11-02 23:06:05,051 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:04" (1/1) ... [2021-11-02 23:06:05,362 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:06:05,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:06:05,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:06:05,364 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:06:05,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:04" (1/1) ... [2021-11-02 23:06:05,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:04" (1/1) ... [2021-11-02 23:06:05,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:04" (1/1) ... [2021-11-02 23:06:05,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:04" (1/1) ... [2021-11-02 23:06:05,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:04" (1/1) ... [2021-11-02 23:06:05,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:04" (1/1) ... [2021-11-02 23:06:05,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:04" (1/1) ... [2021-11-02 23:06:05,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:06:05,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:06:05,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:06:05,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:06:05,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:04" (1/1) ... [2021-11-02 23:06:05,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:06:05,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:05,857 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:06:05,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:06:05,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:06:05,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:06:05,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:06:05,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:06:10,467 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:06:10,468 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-02 23:06:10,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:06:10 BoogieIcfgContainer [2021-11-02 23:06:10,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:06:10,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:06:10,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:06:10,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:06:10,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:06:03" (1/3) ... [2021-11-02 23:06:10,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@345ffcb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:06:10, skipping insertion in model container [2021-11-02 23:06:10,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:04" (2/3) ... [2021-11-02 23:06:10,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@345ffcb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:06:10, skipping insertion in model container [2021-11-02 23:06:10,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:06:10" (3/3) ... [2021-11-02 23:06:10,480 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label09.c [2021-11-02 23:06:10,485 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:06:10,485 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 23:06:10,535 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:06:10,541 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 [2021-11-02 23:06:10,542 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 23:06:10,571 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:10,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 23:06:10,576 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:10,577 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:10,577 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:10,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:10,583 INFO L85 PathProgramCache]: Analyzing trace with hash -569068670, now seen corresponding path program 1 times [2021-11-02 23:06:10,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:10,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367164412] [2021-11-02 23:06:10,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:10,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:10,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:10,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:10,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367164412] [2021-11-02 23:06:10,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367164412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:10,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:10,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 23:06:10,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894845018] [2021-11-02 23:06:10,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:10,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:10,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:10,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:10,826 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 4.0) internal successors, (12), 2 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) [2021-11-02 23:06:14,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:14,569 INFO L93 Difference]: Finished difference Result 1667 states and 3061 transitions. [2021-11-02 23:06:14,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:14,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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 [2021-11-02 23:06:14,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:14,604 INFO L225 Difference]: With dead ends: 1667 [2021-11-02 23:06:14,604 INFO L226 Difference]: Without dead ends: 998 [2021-11-02 23:06:14,614 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:14,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-11-02 23:06:14,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 982. [2021-11-02 23:06:14,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 1.707441386340469) internal successors, (1675), 981 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:14,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1675 transitions. [2021-11-02 23:06:14,772 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1675 transitions. Word has length 12 [2021-11-02 23:06:14,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:14,773 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 1675 transitions. [2021-11-02 23:06:14,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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) [2021-11-02 23:06:14,774 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1675 transitions. [2021-11-02 23:06:14,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 23:06:14,777 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:14,777 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:14,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:06:14,778 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:14,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:14,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1540663647, now seen corresponding path program 1 times [2021-11-02 23:06:14,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:14,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59587074] [2021-11-02 23:06:14,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:14,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:15,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:15,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:15,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59587074] [2021-11-02 23:06:15,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59587074] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:15,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:15,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 23:06:15,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105010582] [2021-11-02 23:06:15,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:15,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:15,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:15,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:15,017 INFO L87 Difference]: Start difference. First operand 982 states and 1675 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 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) [2021-11-02 23:06:18,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:18,152 INFO L93 Difference]: Finished difference Result 2841 states and 4881 transitions. [2021-11-02 23:06:18,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:18,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 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) Word has length 77 [2021-11-02 23:06:18,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:18,165 INFO L225 Difference]: With dead ends: 2841 [2021-11-02 23:06:18,165 INFO L226 Difference]: Without dead ends: 1861 [2021-11-02 23:06:18,168 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:18,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-11-02 23:06:18,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1857. [2021-11-02 23:06:18,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 1.4547413793103448) internal successors, (2700), 1856 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:18,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2700 transitions. [2021-11-02 23:06:18,223 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2700 transitions. Word has length 77 [2021-11-02 23:06:18,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:18,224 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 2700 transitions. [2021-11-02 23:06:18,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 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) [2021-11-02 23:06:18,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2700 transitions. [2021-11-02 23:06:18,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-02 23:06:18,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:18,229 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:18,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 23:06:18,229 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:18,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:18,230 INFO L85 PathProgramCache]: Analyzing trace with hash 463540948, now seen corresponding path program 1 times [2021-11-02 23:06:18,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:18,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068589990] [2021-11-02 23:06:18,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:18,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:18,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:18,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:18,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068589990] [2021-11-02 23:06:18,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068589990] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:18,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:18,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 23:06:18,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578922018] [2021-11-02 23:06:18,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:18,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:18,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:18,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:18,421 INFO L87 Difference]: Start difference. First operand 1857 states and 2700 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:21,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:21,612 INFO L93 Difference]: Finished difference Result 4591 states and 6640 transitions. [2021-11-02 23:06:21,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:21,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 0 states have call successors, (0), 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 117 [2021-11-02 23:06:21,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:21,631 INFO L225 Difference]: With dead ends: 4591 [2021-11-02 23:06:21,631 INFO L226 Difference]: Without dead ends: 2736 [2021-11-02 23:06:21,634 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:21,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-11-02 23:06:21,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2716. [2021-11-02 23:06:21,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 1.390791896869245) internal successors, (3776), 2715 states have internal predecessors, (3776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:21,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 3776 transitions. [2021-11-02 23:06:21,718 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 3776 transitions. Word has length 117 [2021-11-02 23:06:21,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:21,719 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 3776 transitions. [2021-11-02 23:06:21,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:21,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 3776 transitions. [2021-11-02 23:06:21,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-02 23:06:21,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:21,723 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:21,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 23:06:21,723 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:21,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:21,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1189236261, now seen corresponding path program 1 times [2021-11-02 23:06:21,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:21,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199232383] [2021-11-02 23:06:21,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:21,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:21,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:21,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199232383] [2021-11-02 23:06:21,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199232383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:21,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:21,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:06:21,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151929493] [2021-11-02 23:06:21,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:06:21,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:21,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:06:21,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:06:21,906 INFO L87 Difference]: Start difference. First operand 2716 states and 3776 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:24,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:24,677 INFO L93 Difference]: Finished difference Result 5012 states and 6951 transitions. [2021-11-02 23:06:24,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:06:24,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-02 23:06:24,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:24,692 INFO L225 Difference]: With dead ends: 5012 [2021-11-02 23:06:24,692 INFO L226 Difference]: Without dead ends: 2298 [2021-11-02 23:06:24,696 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:06:24,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-11-02 23:06:24,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2282. [2021-11-02 23:06:24,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 2281 states have (on average 1.3726435773783427) internal successors, (3131), 2281 states have internal predecessors, (3131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:24,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3131 transitions. [2021-11-02 23:06:24,753 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3131 transitions. Word has length 123 [2021-11-02 23:06:24,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:24,755 INFO L470 AbstractCegarLoop]: Abstraction has 2282 states and 3131 transitions. [2021-11-02 23:06:24,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:24,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3131 transitions. [2021-11-02 23:06:24,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-02 23:06:24,766 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:24,766 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:24,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 23:06:24,767 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:24,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:24,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1184978189, now seen corresponding path program 1 times [2021-11-02 23:06:24,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:24,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470042734] [2021-11-02 23:06:24,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:24,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-02 23:06:24,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:24,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470042734] [2021-11-02 23:06:24,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470042734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:24,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:24,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 23:06:24,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776056745] [2021-11-02 23:06:24,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:24,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:24,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:24,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:24,942 INFO L87 Difference]: Start difference. First operand 2282 states and 3131 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:27,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:27,195 INFO L93 Difference]: Finished difference Result 5850 states and 8323 transitions. [2021-11-02 23:06:27,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:27,196 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-11-02 23:06:27,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:27,219 INFO L225 Difference]: With dead ends: 5850 [2021-11-02 23:06:27,219 INFO L226 Difference]: Without dead ends: 3995 [2021-11-02 23:06:27,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:27,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3995 states. [2021-11-02 23:06:27,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3995 to 3142. [2021-11-02 23:06:27,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 3141 states have (on average 1.274434893346068) internal successors, (4003), 3141 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:27,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4003 transitions. [2021-11-02 23:06:27,305 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4003 transitions. Word has length 147 [2021-11-02 23:06:27,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:27,306 INFO L470 AbstractCegarLoop]: Abstraction has 3142 states and 4003 transitions. [2021-11-02 23:06:27,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:27,307 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4003 transitions. [2021-11-02 23:06:27,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-02 23:06:27,309 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:27,309 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:27,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 23:06:27,310 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:27,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:27,311 INFO L85 PathProgramCache]: Analyzing trace with hash -604395729, now seen corresponding path program 1 times [2021-11-02 23:06:27,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:27,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984553825] [2021-11-02 23:06:27,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:27,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:27,443 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:27,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:27,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984553825] [2021-11-02 23:06:27,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984553825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:27,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:27,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:06:27,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337102225] [2021-11-02 23:06:27,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:27,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:27,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:27,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:27,450 INFO L87 Difference]: Start difference. First operand 3142 states and 4003 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:29,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:29,866 INFO L93 Difference]: Finished difference Result 7992 states and 10495 transitions. [2021-11-02 23:06:29,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:29,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 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 160 [2021-11-02 23:06:29,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:29,892 INFO L225 Difference]: With dead ends: 7992 [2021-11-02 23:06:29,893 INFO L226 Difference]: Without dead ends: 4852 [2021-11-02 23:06:29,897 INFO L786 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 [2021-11-02 23:06:29,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4852 states. [2021-11-02 23:06:29,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4852 to 4852. [2021-11-02 23:06:29,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4852 states, 4851 states have (on average 1.2665429808286952) internal successors, (6144), 4851 states have internal predecessors, (6144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:30,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4852 states to 4852 states and 6144 transitions. [2021-11-02 23:06:30,009 INFO L78 Accepts]: Start accepts. Automaton has 4852 states and 6144 transitions. Word has length 160 [2021-11-02 23:06:30,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:30,009 INFO L470 AbstractCegarLoop]: Abstraction has 4852 states and 6144 transitions. [2021-11-02 23:06:30,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:30,010 INFO L276 IsEmpty]: Start isEmpty. Operand 4852 states and 6144 transitions. [2021-11-02 23:06:30,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-02 23:06:30,012 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:30,012 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:30,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 23:06:30,013 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:30,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:30,013 INFO L85 PathProgramCache]: Analyzing trace with hash -714630880, now seen corresponding path program 1 times [2021-11-02 23:06:30,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:30,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113493160] [2021-11-02 23:06:30,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:30,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-02 23:06:30,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:30,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113493160] [2021-11-02 23:06:30,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113493160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:30,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:30,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:06:30,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507399391] [2021-11-02 23:06:30,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:30,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:30,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:30,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:30,095 INFO L87 Difference]: Start difference. First operand 4852 states and 6144 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:32,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:32,748 INFO L93 Difference]: Finished difference Result 12249 states and 15825 transitions. [2021-11-02 23:06:32,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:32,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 166 [2021-11-02 23:06:32,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:32,795 INFO L225 Difference]: With dead ends: 12249 [2021-11-02 23:06:32,795 INFO L226 Difference]: Without dead ends: 7399 [2021-11-02 23:06:32,802 INFO L786 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 [2021-11-02 23:06:32,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7399 states. [2021-11-02 23:06:32,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7399 to 4826. [2021-11-02 23:06:32,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 1.2652849740932643) internal successors, (6105), 4825 states have internal predecessors, (6105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:32,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 6105 transitions. [2021-11-02 23:06:32,996 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 6105 transitions. Word has length 166 [2021-11-02 23:06:32,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:32,996 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 6105 transitions. [2021-11-02 23:06:32,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:32,997 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 6105 transitions. [2021-11-02 23:06:32,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-02 23:06:32,999 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:33,000 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:33,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 23:06:33,000 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:33,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:33,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1628723596, now seen corresponding path program 1 times [2021-11-02 23:06:33,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:33,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254925964] [2021-11-02 23:06:33,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:33,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-02 23:06:33,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:33,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254925964] [2021-11-02 23:06:33,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254925964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:33,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:33,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:06:33,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229105418] [2021-11-02 23:06:33,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:33,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:33,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:33,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:33,098 INFO L87 Difference]: Start difference. First operand 4826 states and 6105 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:35,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:35,686 INFO L93 Difference]: Finished difference Result 12204 states and 15757 transitions. [2021-11-02 23:06:35,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:35,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 179 [2021-11-02 23:06:35,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:35,738 INFO L225 Difference]: With dead ends: 12204 [2021-11-02 23:06:35,738 INFO L226 Difference]: Without dead ends: 7380 [2021-11-02 23:06:35,746 INFO L786 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 [2021-11-02 23:06:35,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7380 states. [2021-11-02 23:06:35,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7380 to 6525. [2021-11-02 23:06:35,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6525 states, 6524 states have (on average 1.2665542611894542) internal successors, (8263), 6524 states have internal predecessors, (8263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:35,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6525 states to 6525 states and 8263 transitions. [2021-11-02 23:06:35,908 INFO L78 Accepts]: Start accepts. Automaton has 6525 states and 8263 transitions. Word has length 179 [2021-11-02 23:06:35,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:35,909 INFO L470 AbstractCegarLoop]: Abstraction has 6525 states and 8263 transitions. [2021-11-02 23:06:35,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:35,910 INFO L276 IsEmpty]: Start isEmpty. Operand 6525 states and 8263 transitions. [2021-11-02 23:06:35,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-02 23:06:35,914 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:35,914 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:35,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 23:06:35,915 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:35,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:35,918 INFO L85 PathProgramCache]: Analyzing trace with hash 456712304, now seen corresponding path program 1 times [2021-11-02 23:06:35,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:35,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749679986] [2021-11-02 23:06:35,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:35,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:36,062 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-02 23:06:36,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:36,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749679986] [2021-11-02 23:06:36,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749679986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:36,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:36,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:06:36,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624574694] [2021-11-02 23:06:36,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:36,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:36,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:36,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:36,066 INFO L87 Difference]: Start difference. First operand 6525 states and 8263 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:39,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:39,172 INFO L93 Difference]: Finished difference Result 17751 states and 22351 transitions. [2021-11-02 23:06:39,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:39,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 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 228 [2021-11-02 23:06:39,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:39,201 INFO L225 Difference]: With dead ends: 17751 [2021-11-02 23:06:39,202 INFO L226 Difference]: Without dead ends: 9951 [2021-11-02 23:06:39,211 INFO L786 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 [2021-11-02 23:06:39,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9951 states. [2021-11-02 23:06:39,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9951 to 9943. [2021-11-02 23:06:39,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 1.208006437336552) internal successors, (12010), 9942 states have internal predecessors, (12010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:39,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 12010 transitions. [2021-11-02 23:06:39,382 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 12010 transitions. Word has length 228 [2021-11-02 23:06:39,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:39,383 INFO L470 AbstractCegarLoop]: Abstraction has 9943 states and 12010 transitions. [2021-11-02 23:06:39,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:39,384 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 12010 transitions. [2021-11-02 23:06:39,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-02 23:06:39,388 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:39,389 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:39,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 23:06:39,389 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:39,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:39,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1907858662, now seen corresponding path program 1 times [2021-11-02 23:06:39,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:39,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148740672] [2021-11-02 23:06:39,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:39,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-02 23:06:39,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:39,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148740672] [2021-11-02 23:06:39,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148740672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:39,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:39,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:06:39,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744371210] [2021-11-02 23:06:39,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:39,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:39,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:39,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:39,512 INFO L87 Difference]: Start difference. First operand 9943 states and 12010 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:42,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:42,003 INFO L93 Difference]: Finished difference Result 20736 states and 24968 transitions. [2021-11-02 23:06:42,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:42,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 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 232 [2021-11-02 23:06:42,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:42,025 INFO L225 Difference]: With dead ends: 20736 [2021-11-02 23:06:42,025 INFO L226 Difference]: Without dead ends: 10795 [2021-11-02 23:06:42,036 INFO L786 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 [2021-11-02 23:06:42,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10795 states. [2021-11-02 23:06:42,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10795 to 10369. [2021-11-02 23:06:42,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10369 states, 10368 states have (on average 1.2040895061728396) internal successors, (12484), 10368 states have internal predecessors, (12484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:42,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10369 states to 10369 states and 12484 transitions. [2021-11-02 23:06:42,278 INFO L78 Accepts]: Start accepts. Automaton has 10369 states and 12484 transitions. Word has length 232 [2021-11-02 23:06:42,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:42,278 INFO L470 AbstractCegarLoop]: Abstraction has 10369 states and 12484 transitions. [2021-11-02 23:06:42,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:42,279 INFO L276 IsEmpty]: Start isEmpty. Operand 10369 states and 12484 transitions. [2021-11-02 23:06:42,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-02 23:06:42,284 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:42,284 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:42,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 23:06:42,285 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:42,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:42,285 INFO L85 PathProgramCache]: Analyzing trace with hash 724784780, now seen corresponding path program 1 times [2021-11-02 23:06:42,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:42,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170148328] [2021-11-02 23:06:42,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:42,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:42,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 158 proven. 70 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 23:06:42,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:42,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170148328] [2021-11-02 23:06:42,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170148328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:42,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730530151] [2021-11-02 23:06:42,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:42,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:42,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:42,456 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:42,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:06:42,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:42,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:06:42,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 158 proven. 70 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 23:06:43,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730530151] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:43,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:43,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-11-02 23:06:43,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608369503] [2021-11-02 23:06:43,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:06:43,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:43,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:06:43,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:06:43,757 INFO L87 Difference]: Start difference. First operand 10369 states and 12484 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:47,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:47,877 INFO L93 Difference]: Finished difference Result 25000 states and 30392 transitions. [2021-11-02 23:06:47,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:06:47,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 236 [2021-11-02 23:06:47,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:47,906 INFO L225 Difference]: With dead ends: 25000 [2021-11-02 23:06:47,906 INFO L226 Difference]: Without dead ends: 14208 [2021-11-02 23:06:47,917 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:06:47,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14208 states. [2021-11-02 23:06:48,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14208 to 14204. [2021-11-02 23:06:48,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14204 states, 14203 states have (on average 1.1656692248116596) internal successors, (16556), 14203 states have internal predecessors, (16556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14204 states to 14204 states and 16556 transitions. [2021-11-02 23:06:48,204 INFO L78 Accepts]: Start accepts. Automaton has 14204 states and 16556 transitions. Word has length 236 [2021-11-02 23:06:48,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:48,205 INFO L470 AbstractCegarLoop]: Abstraction has 14204 states and 16556 transitions. [2021-11-02 23:06:48,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:48,205 INFO L276 IsEmpty]: Start isEmpty. Operand 14204 states and 16556 transitions. [2021-11-02 23:06:48,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-02 23:06:48,211 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:48,211 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:48,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:48,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-02 23:06:48,427 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:48,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:48,428 INFO L85 PathProgramCache]: Analyzing trace with hash 360694187, now seen corresponding path program 1 times [2021-11-02 23:06:48,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:48,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502814876] [2021-11-02 23:06:48,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:48,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-02 23:06:48,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:48,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502814876] [2021-11-02 23:06:48,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502814876] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:48,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:48,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:06:48,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873451483] [2021-11-02 23:06:48,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:06:48,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:48,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:06:48,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:06:48,586 INFO L87 Difference]: Start difference. First operand 14204 states and 16556 transitions. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:53,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:53,105 INFO L93 Difference]: Finished difference Result 35706 states and 42629 transitions. [2021-11-02 23:06:53,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:06:53,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 272 [2021-11-02 23:06:53,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:53,141 INFO L225 Difference]: With dead ends: 35706 [2021-11-02 23:06:53,141 INFO L226 Difference]: Without dead ends: 20222 [2021-11-02 23:06:53,156 INFO L786 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 [2021-11-02 23:06:53,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20222 states. [2021-11-02 23:06:53,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20222 to 18906. [2021-11-02 23:06:53,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18906 states, 18905 states have (on average 1.1726527373710658) internal successors, (22169), 18905 states have internal predecessors, (22169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:53,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18906 states to 18906 states and 22169 transitions. [2021-11-02 23:06:53,504 INFO L78 Accepts]: Start accepts. Automaton has 18906 states and 22169 transitions. Word has length 272 [2021-11-02 23:06:53,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:53,505 INFO L470 AbstractCegarLoop]: Abstraction has 18906 states and 22169 transitions. [2021-11-02 23:06:53,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:53,505 INFO L276 IsEmpty]: Start isEmpty. Operand 18906 states and 22169 transitions. [2021-11-02 23:06:53,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-11-02 23:06:53,512 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:53,513 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:53,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 23:06:53,513 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:53,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:53,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1155752568, now seen corresponding path program 2 times [2021-11-02 23:06:53,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:53,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329530994] [2021-11-02 23:06:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:53,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 327 proven. 40 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-02 23:06:53,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:53,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329530994] [2021-11-02 23:06:53,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329530994] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:53,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612681469] [2021-11-02 23:06:53,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:06:53,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:53,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:53,754 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:53,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 23:06:54,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:06:54,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:54,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 23:06:54,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2021-11-02 23:06:54,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612681469] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:54,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:06:54,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-02 23:06:54,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335101123] [2021-11-02 23:06:54,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:54,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:54,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:54,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:06:54,797 INFO L87 Difference]: Start difference. First operand 18906 states and 22169 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:57,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:57,237 INFO L93 Difference]: Finished difference Result 49298 states and 57703 transitions. [2021-11-02 23:06:57,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:57,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 306 [2021-11-02 23:06:57,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:57,277 INFO L225 Difference]: With dead ends: 49298 [2021-11-02 23:06:57,277 INFO L226 Difference]: Without dead ends: 28265 [2021-11-02 23:06:57,291 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:06:57,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28265 states. [2021-11-02 23:06:57,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28265 to 27836. [2021-11-02 23:06:57,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27836 states, 27835 states have (on average 1.123118376145141) internal successors, (31262), 27835 states have internal predecessors, (31262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:57,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27836 states to 27836 states and 31262 transitions. [2021-11-02 23:06:57,762 INFO L78 Accepts]: Start accepts. Automaton has 27836 states and 31262 transitions. Word has length 306 [2021-11-02 23:06:57,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:57,763 INFO L470 AbstractCegarLoop]: Abstraction has 27836 states and 31262 transitions. [2021-11-02 23:06:57,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:57,763 INFO L276 IsEmpty]: Start isEmpty. Operand 27836 states and 31262 transitions. [2021-11-02 23:06:57,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-11-02 23:06:57,768 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:57,768 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:57,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:57,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:57,983 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:57,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:57,984 INFO L85 PathProgramCache]: Analyzing trace with hash -2012085875, now seen corresponding path program 1 times [2021-11-02 23:06:57,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:57,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132834276] [2021-11-02 23:06:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:57,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-02 23:06:58,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:58,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132834276] [2021-11-02 23:06:58,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132834276] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:58,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:58,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:06:58,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809332377] [2021-11-02 23:06:58,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:58,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:58,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:58,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:58,177 INFO L87 Difference]: Start difference. First operand 27836 states and 31262 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:00,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:00,576 INFO L93 Difference]: Finished difference Result 62079 states and 70131 transitions. [2021-11-02 23:07:00,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:07:00,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 324 [2021-11-02 23:07:00,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:00,837 INFO L225 Difference]: With dead ends: 62079 [2021-11-02 23:07:00,839 INFO L226 Difference]: Without dead ends: 34670 [2021-11-02 23:07:00,865 INFO L786 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 [2021-11-02 23:07:00,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34670 states. [2021-11-02 23:07:01,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34670 to 32535. [2021-11-02 23:07:01,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32535 states, 32534 states have (on average 1.1330300608594086) internal successors, (36862), 32534 states have internal predecessors, (36862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:01,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32535 states to 32535 states and 36862 transitions. [2021-11-02 23:07:01,545 INFO L78 Accepts]: Start accepts. Automaton has 32535 states and 36862 transitions. Word has length 324 [2021-11-02 23:07:01,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:01,545 INFO L470 AbstractCegarLoop]: Abstraction has 32535 states and 36862 transitions. [2021-11-02 23:07:01,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:01,546 INFO L276 IsEmpty]: Start isEmpty. Operand 32535 states and 36862 transitions. [2021-11-02 23:07:01,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-11-02 23:07:01,551 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:01,552 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:01,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 23:07:01,552 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:01,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:01,553 INFO L85 PathProgramCache]: Analyzing trace with hash 4203890, now seen corresponding path program 1 times [2021-11-02 23:07:01,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:01,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723535563] [2021-11-02 23:07:01,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:01,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:01,847 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-02 23:07:01,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:01,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723535563] [2021-11-02 23:07:01,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723535563] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:07:01,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:07:01,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:07:01,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741177374] [2021-11-02 23:07:01,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:07:01,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:01,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:07:01,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:07:01,850 INFO L87 Difference]: Start difference. First operand 32535 states and 36862 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:04,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:04,134 INFO L93 Difference]: Finished difference Result 76552 states and 87240 transitions. [2021-11-02 23:07:04,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:07:04,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 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 345 [2021-11-02 23:07:04,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:04,174 INFO L225 Difference]: With dead ends: 76552 [2021-11-02 23:07:04,174 INFO L226 Difference]: Without dead ends: 41879 [2021-11-02 23:07:04,196 INFO L786 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 [2021-11-02 23:07:04,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41879 states. [2021-11-02 23:07:04,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41879 to 41871. [2021-11-02 23:07:04,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41871 states, 41870 states have (on average 1.1164795796513016) internal successors, (46747), 41870 states have internal predecessors, (46747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:04,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41871 states to 41871 states and 46747 transitions. [2021-11-02 23:07:04,948 INFO L78 Accepts]: Start accepts. Automaton has 41871 states and 46747 transitions. Word has length 345 [2021-11-02 23:07:04,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:04,949 INFO L470 AbstractCegarLoop]: Abstraction has 41871 states and 46747 transitions. [2021-11-02 23:07:04,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:04,950 INFO L276 IsEmpty]: Start isEmpty. Operand 41871 states and 46747 transitions. [2021-11-02 23:07:04,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-11-02 23:07:04,955 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:04,956 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:04,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 23:07:04,956 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:04,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:04,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1918113595, now seen corresponding path program 1 times [2021-11-02 23:07:04,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:04,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308085464] [2021-11-02 23:07:04,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:04,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 438 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-02 23:07:05,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:05,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308085464] [2021-11-02 23:07:05,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308085464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:07:05,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:07:05,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:07:05,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400674511] [2021-11-02 23:07:05,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:07:05,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:05,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:07:05,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:07:05,100 INFO L87 Difference]: Start difference. First operand 41871 states and 46747 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:07,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:07,509 INFO L93 Difference]: Finished difference Result 94828 states and 106426 transitions. [2021-11-02 23:07:07,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:07:07,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 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 358 [2021-11-02 23:07:07,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:07,577 INFO L225 Difference]: With dead ends: 94828 [2021-11-02 23:07:07,577 INFO L226 Difference]: Without dead ends: 53384 [2021-11-02 23:07:07,599 INFO L786 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 [2021-11-02 23:07:07,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53384 states. [2021-11-02 23:07:08,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53384 to 49531. [2021-11-02 23:07:08,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49531 states, 49530 states have (on average 1.1096507167373308) internal successors, (54961), 49530 states have internal predecessors, (54961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:08,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49531 states to 49531 states and 54961 transitions. [2021-11-02 23:07:08,291 INFO L78 Accepts]: Start accepts. Automaton has 49531 states and 54961 transitions. Word has length 358 [2021-11-02 23:07:08,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:08,292 INFO L470 AbstractCegarLoop]: Abstraction has 49531 states and 54961 transitions. [2021-11-02 23:07:08,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:08,292 INFO L276 IsEmpty]: Start isEmpty. Operand 49531 states and 54961 transitions. [2021-11-02 23:07:08,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-11-02 23:07:08,300 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:08,301 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:08,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 23:07:08,301 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:08,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:08,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1419132856, now seen corresponding path program 1 times [2021-11-02 23:07:08,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:08,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581293595] [2021-11-02 23:07:08,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:08,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 244 proven. 10 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-02 23:07:08,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:08,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581293595] [2021-11-02 23:07:08,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581293595] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:08,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173105718] [2021-11-02 23:07:08,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:08,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:08,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:08,495 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:08,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 23:07:09,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:09,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:07:09,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 349 proven. 82 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-02 23:07:10,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173105718] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:10,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:10,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2021-11-02 23:07:10,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487008983] [2021-11-02 23:07:10,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:07:10,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:10,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:07:10,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:07:10,353 INFO L87 Difference]: Start difference. First operand 49531 states and 54961 transitions. Second operand has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:20,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:20,050 INFO L93 Difference]: Finished difference Result 139121 states and 153913 transitions. [2021-11-02 23:07:20,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:07:20,051 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 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 392 [2021-11-02 23:07:20,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:20,121 INFO L225 Difference]: With dead ends: 139121 [2021-11-02 23:07:20,121 INFO L226 Difference]: Without dead ends: 86180 [2021-11-02 23:07:20,142 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:07:20,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86180 states. [2021-11-02 23:07:21,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86180 to 75459. [2021-11-02 23:07:21,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75459 states, 75458 states have (on average 1.0941583397386625) internal successors, (82563), 75458 states have internal predecessors, (82563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:21,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75459 states to 75459 states and 82563 transitions. [2021-11-02 23:07:21,439 INFO L78 Accepts]: Start accepts. Automaton has 75459 states and 82563 transitions. Word has length 392 [2021-11-02 23:07:21,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:21,451 INFO L470 AbstractCegarLoop]: Abstraction has 75459 states and 82563 transitions. [2021-11-02 23:07:21,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:21,452 INFO L276 IsEmpty]: Start isEmpty. Operand 75459 states and 82563 transitions. [2021-11-02 23:07:21,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2021-11-02 23:07:21,483 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:21,483 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:21,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:21,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 23:07:21,684 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:21,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:21,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1637257269, now seen corresponding path program 1 times [2021-11-02 23:07:21,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:21,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303856532] [2021-11-02 23:07:21,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:21,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 236 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-02 23:07:21,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:21,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303856532] [2021-11-02 23:07:21,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303856532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:07:21,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:07:21,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:07:21,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669291690] [2021-11-02 23:07:21,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:07:21,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:21,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:07:21,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:07:21,893 INFO L87 Difference]: Start difference. First operand 75459 states and 82563 transitions. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:24,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:24,262 INFO L93 Difference]: Finished difference Result 169224 states and 185589 transitions. [2021-11-02 23:07:24,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:07:24,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 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 426 [2021-11-02 23:07:24,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:24,345 INFO L225 Difference]: With dead ends: 169224 [2021-11-02 23:07:24,345 INFO L226 Difference]: Without dead ends: 93338 [2021-11-02 23:07:24,374 INFO L786 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 [2021-11-02 23:07:24,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93338 states. [2021-11-02 23:07:25,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93338 to 91198. [2021-11-02 23:07:25,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91198 states, 91197 states have (on average 1.0872287465596455) internal successors, (99152), 91197 states have internal predecessors, (99152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:25,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91198 states to 91198 states and 99152 transitions. [2021-11-02 23:07:25,924 INFO L78 Accepts]: Start accepts. Automaton has 91198 states and 99152 transitions. Word has length 426 [2021-11-02 23:07:25,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:25,925 INFO L470 AbstractCegarLoop]: Abstraction has 91198 states and 99152 transitions. [2021-11-02 23:07:25,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:25,925 INFO L276 IsEmpty]: Start isEmpty. Operand 91198 states and 99152 transitions. [2021-11-02 23:07:25,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-11-02 23:07:25,936 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:25,937 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:25,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 23:07:25,937 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:25,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:25,938 INFO L85 PathProgramCache]: Analyzing trace with hash 2139687140, now seen corresponding path program 1 times [2021-11-02 23:07:25,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:25,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989638505] [2021-11-02 23:07:25,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:25,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:26,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 297 proven. 0 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2021-11-02 23:07:26,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:26,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989638505] [2021-11-02 23:07:26,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989638505] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:07:26,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:07:26,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:07:26,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575273194] [2021-11-02 23:07:26,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:07:26,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:26,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:07:26,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:07:26,218 INFO L87 Difference]: Start difference. First operand 91198 states and 99152 transitions. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:28,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:28,893 INFO L93 Difference]: Finished difference Result 183672 states and 200017 transitions. [2021-11-02 23:07:28,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:07:28,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 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 476 [2021-11-02 23:07:28,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:28,978 INFO L225 Difference]: With dead ends: 183672 [2021-11-02 23:07:28,978 INFO L226 Difference]: Without dead ends: 93326 [2021-11-02 23:07:29,008 INFO L786 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 [2021-11-02 23:07:29,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93326 states. [2021-11-02 23:07:30,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93326 to 91186. [2021-11-02 23:07:30,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91186 states, 91185 states have (on average 1.080923397488622) internal successors, (98564), 91185 states have internal predecessors, (98564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91186 states to 91186 states and 98564 transitions. [2021-11-02 23:07:30,340 INFO L78 Accepts]: Start accepts. Automaton has 91186 states and 98564 transitions. Word has length 476 [2021-11-02 23:07:30,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:30,340 INFO L470 AbstractCegarLoop]: Abstraction has 91186 states and 98564 transitions. [2021-11-02 23:07:30,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:30,343 INFO L276 IsEmpty]: Start isEmpty. Operand 91186 states and 98564 transitions. [2021-11-02 23:07:30,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2021-11-02 23:07:30,356 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:30,357 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:30,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 23:07:30,357 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:30,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:30,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1732638651, now seen corresponding path program 1 times [2021-11-02 23:07:30,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:30,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530199111] [2021-11-02 23:07:30,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:30,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 367 proven. 103 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-02 23:07:30,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:30,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530199111] [2021-11-02 23:07:30,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530199111] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:30,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682364873] [2021-11-02 23:07:30,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:30,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:30,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:30,647 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:30,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 23:07:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:31,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:07:31,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 367 proven. 103 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-02 23:07:32,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682364873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:32,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:32,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-11-02 23:07:32,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006711716] [2021-11-02 23:07:32,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:07:32,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:32,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:07:32,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:07:32,744 INFO L87 Difference]: Start difference. First operand 91186 states and 98564 transitions. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:36,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:36,243 INFO L93 Difference]: Finished difference Result 193000 states and 208912 transitions. [2021-11-02 23:07:36,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:07:36,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 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 486 [2021-11-02 23:07:36,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:36,337 INFO L225 Difference]: With dead ends: 193000 [2021-11-02 23:07:36,337 INFO L226 Difference]: Without dead ends: 102240 [2021-11-02 23:07:36,357 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 486 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:07:36,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102240 states. [2021-11-02 23:07:37,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102240 to 80950. [2021-11-02 23:07:37,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80950 states, 80949 states have (on average 1.0699699810992107) internal successors, (86613), 80949 states have internal predecessors, (86613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:37,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80950 states to 80950 states and 86613 transitions. [2021-11-02 23:07:37,399 INFO L78 Accepts]: Start accepts. Automaton has 80950 states and 86613 transitions. Word has length 486 [2021-11-02 23:07:37,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:37,399 INFO L470 AbstractCegarLoop]: Abstraction has 80950 states and 86613 transitions. [2021-11-02 23:07:37,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:37,400 INFO L276 IsEmpty]: Start isEmpty. Operand 80950 states and 86613 transitions. [2021-11-02 23:07:37,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2021-11-02 23:07:37,409 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:37,410 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:37,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:37,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-11-02 23:07:37,610 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:37,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:37,611 INFO L85 PathProgramCache]: Analyzing trace with hash -465471891, now seen corresponding path program 1 times [2021-11-02 23:07:37,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:37,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741586931] [2021-11-02 23:07:37,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:37,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 373 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-02 23:07:38,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:38,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741586931] [2021-11-02 23:07:38,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741586931] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:38,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96420194] [2021-11-02 23:07:38,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:38,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:38,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:38,351 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:38,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 23:07:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:38,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:07:39,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 373 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-02 23:07:41,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96420194] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:41,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:41,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-11-02 23:07:41,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564161136] [2021-11-02 23:07:41,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:07:41,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:41,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:07:41,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:07:41,559 INFO L87 Difference]: Start difference. First operand 80950 states and 86613 transitions. Second operand has 8 states, 8 states have (on average 73.0) internal successors, (584), 7 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:45,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:45,888 INFO L93 Difference]: Finished difference Result 161547 states and 172864 transitions. [2021-11-02 23:07:45,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:07:45,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 73.0) internal successors, (584), 7 states have internal predecessors, (584), 0 states have call successors, (0), 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 500 [2021-11-02 23:07:45,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:45,955 INFO L225 Difference]: With dead ends: 161547 [2021-11-02 23:07:45,955 INFO L226 Difference]: Without dead ends: 81449 [2021-11-02 23:07:45,986 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:07:46,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81449 states. [2021-11-02 23:07:46,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81449 to 80950. [2021-11-02 23:07:46,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80950 states, 80949 states have (on average 1.0699205672707508) internal successors, (86609), 80949 states have internal predecessors, (86609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:46,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80950 states to 80950 states and 86609 transitions. [2021-11-02 23:07:46,969 INFO L78 Accepts]: Start accepts. Automaton has 80950 states and 86609 transitions. Word has length 500 [2021-11-02 23:07:47,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:47,323 INFO L470 AbstractCegarLoop]: Abstraction has 80950 states and 86609 transitions. [2021-11-02 23:07:47,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 73.0) internal successors, (584), 7 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:47,323 INFO L276 IsEmpty]: Start isEmpty. Operand 80950 states and 86609 transitions. [2021-11-02 23:07:47,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2021-11-02 23:07:47,347 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:47,348 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:47,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:47,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:47,548 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:47,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:47,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1861228897, now seen corresponding path program 1 times [2021-11-02 23:07:47,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:47,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758437238] [2021-11-02 23:07:47,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:47,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 346 proven. 72 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-02 23:07:47,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:47,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758437238] [2021-11-02 23:07:47,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758437238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:47,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794506751] [2021-11-02 23:07:47,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:47,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:47,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:47,878 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:47,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 23:07:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:48,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:07:48,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 244 proven. 10 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-02 23:07:50,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794506751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:50,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:50,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-11-02 23:07:50,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050143313] [2021-11-02 23:07:50,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:07:50,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:50,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:07:50,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:07:50,487 INFO L87 Difference]: Start difference. First operand 80950 states and 86609 transitions. Second operand has 6 states, 6 states have (on average 136.66666666666666) internal successors, (820), 6 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:57,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:57,893 INFO L93 Difference]: Finished difference Result 209625 states and 224418 transitions. [2021-11-02 23:07:57,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:07:57,896 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 136.66666666666666) internal successors, (820), 6 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 579 [2021-11-02 23:07:57,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:58,258 INFO L225 Difference]: With dead ends: 209625 [2021-11-02 23:07:58,258 INFO L226 Difference]: Without dead ends: 127826 [2021-11-02 23:07:58,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 579 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:07:58,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127826 states. [2021-11-02 23:07:59,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127826 to 114599. [2021-11-02 23:07:59,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114599 states, 114598 states have (on average 1.0692245937974485) internal successors, (122531), 114598 states have internal predecessors, (122531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:59,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114599 states to 114599 states and 122531 transitions. [2021-11-02 23:07:59,726 INFO L78 Accepts]: Start accepts. Automaton has 114599 states and 122531 transitions. Word has length 579 [2021-11-02 23:07:59,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:59,727 INFO L470 AbstractCegarLoop]: Abstraction has 114599 states and 122531 transitions. [2021-11-02 23:07:59,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 136.66666666666666) internal successors, (820), 6 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:59,727 INFO L276 IsEmpty]: Start isEmpty. Operand 114599 states and 122531 transitions. [2021-11-02 23:07:59,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2021-11-02 23:07:59,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:59,737 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:59,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:59,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1c11a-6553-4a74-a4d0-ad9c54bf8d43/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:59,939 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:59,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:59,939 INFO L85 PathProgramCache]: Analyzing trace with hash 639526854, now seen corresponding path program 1 times [2021-11-02 23:07:59,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:59,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276366039] [2021-11-02 23:07:59,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:59,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 884 trivial. 0 not checked. [2021-11-02 23:08:00,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:00,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276366039] [2021-11-02 23:08:00,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276366039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:08:00,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:08:00,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:08:00,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943714505] [2021-11-02 23:08:00,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:08:00,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:00,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:08:00,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:08:00,178 INFO L87 Difference]: Start difference. First operand 114599 states and 122531 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:02,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:02,866 INFO L93 Difference]: Finished difference Result 231324 states and 247224 transitions. [2021-11-02 23:08:02,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:08:02,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 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 581 [2021-11-02 23:08:02,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:02,994 INFO L225 Difference]: With dead ends: 231324 [2021-11-02 23:08:02,994 INFO L226 Difference]: Without dead ends: 117152 [2021-11-02 23:08:03,039 INFO L786 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 [2021-11-02 23:08:03,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117152 states. [2021-11-02 23:08:04,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117152 to 115443. [2021-11-02 23:08:04,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115443 states, 115442 states have (on average 1.0646731692105127) internal successors, (122908), 115442 states have internal predecessors, (122908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:04,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115443 states to 115443 states and 122908 transitions. [2021-11-02 23:08:04,974 INFO L78 Accepts]: Start accepts. Automaton has 115443 states and 122908 transitions. Word has length 581 [2021-11-02 23:08:04,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:04,975 INFO L470 AbstractCegarLoop]: Abstraction has 115443 states and 122908 transitions. [2021-11-02 23:08:04,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:04,975 INFO L276 IsEmpty]: Start isEmpty. Operand 115443 states and 122908 transitions. [2021-11-02 23:08:04,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2021-11-02 23:08:04,989 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:04,990 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:04,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-02 23:08:04,990 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:04,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:04,991 INFO L85 PathProgramCache]: Analyzing trace with hash 652370778, now seen corresponding path program 1 times [2021-11-02 23:08:04,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:04,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000606360] [2021-11-02 23:08:04,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:04,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 424 proven. 0 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2021-11-02 23:08:05,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:05,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000606360] [2021-11-02 23:08:05,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000606360] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:08:05,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:08:05,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:08:05,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841045524] [2021-11-02 23:08:05,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:08:05,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:05,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:08:05,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:08:05,328 INFO L87 Difference]: Start difference. First operand 115443 states and 122908 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:08,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:08,097 INFO L93 Difference]: Finished difference Result 234307 states and 249457 transitions. [2021-11-02 23:08:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:08:08,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 594 [2021-11-02 23:08:08,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:08,211 INFO L225 Difference]: With dead ends: 234307 [2021-11-02 23:08:08,212 INFO L226 Difference]: Without dead ends: 119716 [2021-11-02 23:08:08,252 INFO L786 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 [2021-11-02 23:08:08,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119716 states. [2021-11-02 23:08:10,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119716 to 118001. [2021-11-02 23:08:10,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118001 states, 118000 states have (on average 1.0633898305084746) internal successors, (125480), 118000 states have internal predecessors, (125480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:10,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118001 states to 118001 states and 125480 transitions. [2021-11-02 23:08:10,199 INFO L78 Accepts]: Start accepts. Automaton has 118001 states and 125480 transitions. Word has length 594 [2021-11-02 23:08:10,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:10,200 INFO L470 AbstractCegarLoop]: Abstraction has 118001 states and 125480 transitions. [2021-11-02 23:08:10,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:10,200 INFO L276 IsEmpty]: Start isEmpty. Operand 118001 states and 125480 transitions. [2021-11-02 23:08:10,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2021-11-02 23:08:10,211 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:10,211 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:10,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-02 23:08:10,211 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:10,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:10,212 INFO L85 PathProgramCache]: Analyzing trace with hash -468012912, now seen corresponding path program 1 times [2021-11-02 23:08:10,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:10,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572209270] [2021-11-02 23:08:10,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:10,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 644 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 23:08:10,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:10,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572209270] [2021-11-02 23:08:10,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572209270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:08:10,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:08:10,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:08:10,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342240638] [2021-11-02 23:08:10,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:08:10,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:10,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:08:10,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:08:10,545 INFO L87 Difference]: Start difference. First operand 118001 states and 125480 transitions. Second operand has 6 states, 6 states have (on average 97.83333333333333) internal successors, (587), 5 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:14,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:14,693 INFO L93 Difference]: Finished difference Result 227509 states and 241881 transitions. [2021-11-02 23:08:14,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:08:14,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 97.83333333333333) internal successors, (587), 5 states have internal predecessors, (587), 0 states have call successors, (0), 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 596 [2021-11-02 23:08:14,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:14,805 INFO L225 Difference]: With dead ends: 227509 [2021-11-02 23:08:14,805 INFO L226 Difference]: Without dead ends: 110358 [2021-11-02 23:08:14,850 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:08:14,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110358 states. [2021-11-02 23:08:16,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110358 to 107319. [2021-11-02 23:08:16,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107319 states, 107318 states have (on average 1.0634935425557688) internal successors, (114132), 107318 states have internal predecessors, (114132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:16,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107319 states to 107319 states and 114132 transitions. [2021-11-02 23:08:16,428 INFO L78 Accepts]: Start accepts. Automaton has 107319 states and 114132 transitions. Word has length 596 [2021-11-02 23:08:16,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:16,428 INFO L470 AbstractCegarLoop]: Abstraction has 107319 states and 114132 transitions. [2021-11-02 23:08:16,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 97.83333333333333) internal successors, (587), 5 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:16,429 INFO L276 IsEmpty]: Start isEmpty. Operand 107319 states and 114132 transitions. [2021-11-02 23:08:16,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2021-11-02 23:08:16,434 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:16,434 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:16,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-02 23:08:16,434 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:16,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:16,435 INFO L85 PathProgramCache]: Analyzing trace with hash -76899865, now seen corresponding path program 1 times [2021-11-02 23:08:16,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:16,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342795957] [2021-11-02 23:08:16,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:16,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms