./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:34:53,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:34:53,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:34:53,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:34:53,611 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:34:53,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:34:53,619 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:34:53,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:34:53,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:34:53,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:34:53,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:34:53,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:34:53,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:34:53,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:34:53,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:34:53,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:34:53,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:34:53,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:34:53,653 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:34:53,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:34:53,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:34:53,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:34:53,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:34:53,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:34:53,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:34:53,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:34:53,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:34:53,671 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:34:53,672 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:34:53,673 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:34:53,674 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:34:53,675 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:34:53,676 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:34:53,677 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:34:53,679 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:34:53,680 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:34:53,681 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:34:53,681 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:34:53,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:34:53,683 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:34:53,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:34:53,686 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-23 12:34:53,712 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:34:53,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:34:53,713 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:34:53,713 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:34:53,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:34:53,714 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:34:53,715 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:34:53,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:34:53,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:34:53,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:34:53,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:34:53,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:34:53,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:34:53,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:34:53,717 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:34:53,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:34:53,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:34:53,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:34:53,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:34:53,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:34:53,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:34:53,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:34:53,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:34:53,719 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:34:53,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:34:53,720 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:34:53,720 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:34:53,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:34:53,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:34:53,721 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_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b [2021-11-23 12:34:53,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:34:54,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:34:54,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:34:54,018 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:34:54,020 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:34:54,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-23 12:34:54,113 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/data/1a33eec38/edc93b241fe8459b93e8d8156b5ff8bb/FLAG7ebdd05f6 [2021-11-23 12:34:55,028 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:34:55,029 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-23 12:34:55,096 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/data/1a33eec38/edc93b241fe8459b93e8d8156b5ff8bb/FLAG7ebdd05f6 [2021-11-23 12:34:55,534 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/data/1a33eec38/edc93b241fe8459b93e8d8156b5ff8bb [2021-11-23 12:34:55,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:34:55,539 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:34:55,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:34:55,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:34:55,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:34:55,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:34:55" (1/1) ... [2021-11-23 12:34:55,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16ea4709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:55, skipping insertion in model container [2021-11-23 12:34:55,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:34:55" (1/1) ... [2021-11-23 12:34:55,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:34:55,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:34:57,249 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-23 12:34:57,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:34:57,938 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:34:58,136 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-23 12:34:58,339 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:34:58,416 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:34:58,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:58 WrapperNode [2021-11-23 12:34:58,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:34:58,418 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:34:58,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:34:58,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:34:58,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:58" (1/1) ... [2021-11-23 12:34:58,486 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:58" (1/1) ... [2021-11-23 12:34:58,763 INFO L137 Inliner]: procedures = 180, calls = 578, calls flagged for inlining = 227, calls inlined = 372, statements flattened = 4756 [2021-11-23 12:34:58,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:34:58,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:34:58,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:34:58,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:34:58,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:58" (1/1) ... [2021-11-23 12:34:58,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:58" (1/1) ... [2021-11-23 12:34:58,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:58" (1/1) ... [2021-11-23 12:34:58,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:58" (1/1) ... [2021-11-23 12:34:58,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:58" (1/1) ... [2021-11-23 12:34:58,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:58" (1/1) ... [2021-11-23 12:34:58,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:58" (1/1) ... [2021-11-23 12:34:59,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:34:59,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:34:59,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:34:59,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:34:59,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:58" (1/1) ... [2021-11-23 12:34:59,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:34:59,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:59,070 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:34:59,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:34:59,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 12:34:59,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 12:34:59,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 12:34:59,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 12:34:59,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 12:34:59,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 12:34:59,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:34:59,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 12:34:59,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 12:34:59,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 12:34:59,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 12:34:59,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 12:34:59,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:34:59,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 12:34:59,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:34:59,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:34:59,840 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:34:59,847 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:35:05,321 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:35:05,352 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:35:05,357 INFO L301 CfgBuilder]: Removed 25 assume(true) statements. [2021-11-23 12:35:05,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:35:05 BoogieIcfgContainer [2021-11-23 12:35:05,362 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:35:05,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:35:05,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:35:05,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:35:05,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:34:55" (1/3) ... [2021-11-23 12:35:05,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436a5ae0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:35:05, skipping insertion in model container [2021-11-23 12:35:05,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:34:58" (2/3) ... [2021-11-23 12:35:05,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436a5ae0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:35:05, skipping insertion in model container [2021-11-23 12:35:05,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:35:05" (3/3) ... [2021-11-23 12:35:05,377 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-23 12:35:05,384 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:35:05,384 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 12:35:05,479 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:35:05,488 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 [2021-11-23 12:35:05,488 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 12:35:05,564 INFO L276 IsEmpty]: Start isEmpty. Operand has 976 states, 974 states have (on average 1.486652977412731) internal successors, (1448), 975 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:05,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 12:35:05,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:35:05,584 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:35:05,585 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:35:05,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:05,592 INFO L85 PathProgramCache]: Analyzing trace with hash -988917358, now seen corresponding path program 1 times [2021-11-23 12:35:05,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:05,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580187428] [2021-11-23 12:35:05,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:05,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:06,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:35:06,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:06,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580187428] [2021-11-23 12:35:06,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580187428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:35:06,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:35:06,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:35:06,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530361306] [2021-11-23 12:35:06,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:35:06,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:35:06,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:35:06,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:35:06,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:35:06,176 INFO L87 Difference]: Start difference. First operand has 976 states, 974 states have (on average 1.486652977412731) internal successors, (1448), 975 states have internal predecessors, (1448), 0 states have call successors, (0), 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 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:06,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:35:06,421 INFO L93 Difference]: Finished difference Result 2838 states and 4225 transitions. [2021-11-23 12:35:06,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:35:06,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-23 12:35:06,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:35:06,466 INFO L225 Difference]: With dead ends: 2838 [2021-11-23 12:35:06,466 INFO L226 Difference]: Without dead ends: 1855 [2021-11-23 12:35:06,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:35:06,494 INFO L933 BasicCegarLoop]: 1377 mSDtfsCounter, 1280 mSDsluCounter, 1363 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1280 SdHoareTripleChecker+Valid, 2740 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:35:06,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1280 Valid, 2740 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:35:06,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2021-11-23 12:35:06,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1855. [2021-11-23 12:35:06,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1854 states have (on average 1.4239482200647249) internal successors, (2640), 1854 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:06,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 2640 transitions. [2021-11-23 12:35:06,674 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 2640 transitions. Word has length 37 [2021-11-23 12:35:06,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:35:06,674 INFO L470 AbstractCegarLoop]: Abstraction has 1855 states and 2640 transitions. [2021-11-23 12:35:06,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:06,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 2640 transitions. [2021-11-23 12:35:06,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 12:35:06,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:35:06,679 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:35:06,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:35:06,679 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:35:06,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:06,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1669960264, now seen corresponding path program 1 times [2021-11-23 12:35:06,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:06,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842198982] [2021-11-23 12:35:06,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:06,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:35:06,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:06,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842198982] [2021-11-23 12:35:06,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842198982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:35:06,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:35:06,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:35:06,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339755272] [2021-11-23 12:35:06,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:35:06,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:35:06,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:35:06,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:35:06,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:35:06,886 INFO L87 Difference]: Start difference. First operand 1855 states and 2640 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:07,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:35:07,432 INFO L93 Difference]: Finished difference Result 5455 states and 7791 transitions. [2021-11-23 12:35:07,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:35:07,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-23 12:35:07,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:35:07,462 INFO L225 Difference]: With dead ends: 5455 [2021-11-23 12:35:07,462 INFO L226 Difference]: Without dead ends: 3648 [2021-11-23 12:35:07,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:35:07,475 INFO L933 BasicCegarLoop]: 1304 mSDtfsCounter, 1336 mSDsluCounter, 3846 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1336 SdHoareTripleChecker+Valid, 5150 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:35:07,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1336 Valid, 5150 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:35:07,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3648 states. [2021-11-23 12:35:07,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3648 to 3552. [2021-11-23 12:35:07,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3552 states, 3551 states have (on average 1.431427766826246) internal successors, (5083), 3551 states have internal predecessors, (5083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:07,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3552 states to 3552 states and 5083 transitions. [2021-11-23 12:35:07,646 INFO L78 Accepts]: Start accepts. Automaton has 3552 states and 5083 transitions. Word has length 41 [2021-11-23 12:35:07,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:35:07,647 INFO L470 AbstractCegarLoop]: Abstraction has 3552 states and 5083 transitions. [2021-11-23 12:35:07,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:07,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3552 states and 5083 transitions. [2021-11-23 12:35:07,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-23 12:35:07,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:35:07,661 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:35:07,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 12:35:07,661 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:35:07,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:07,662 INFO L85 PathProgramCache]: Analyzing trace with hash -123608290, now seen corresponding path program 1 times [2021-11-23 12:35:07,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:07,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146402054] [2021-11-23 12:35:07,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:07,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:35:07,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:07,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146402054] [2021-11-23 12:35:07,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146402054] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:35:07,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:35:07,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:35:07,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418204111] [2021-11-23 12:35:07,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:35:07,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:35:07,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:35:07,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:35:07,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:35:07,770 INFO L87 Difference]: Start difference. First operand 3552 states and 5083 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:08,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:35:08,028 INFO L93 Difference]: Finished difference Result 8602 states and 12374 transitions. [2021-11-23 12:35:08,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:35:08,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-11-23 12:35:08,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:35:08,067 INFO L225 Difference]: With dead ends: 8602 [2021-11-23 12:35:08,068 INFO L226 Difference]: Without dead ends: 5104 [2021-11-23 12:35:08,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:35:08,082 INFO L933 BasicCegarLoop]: 1374 mSDtfsCounter, 652 mSDsluCounter, 1265 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 2639 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:35:08,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [652 Valid, 2639 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:35:08,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5104 states. [2021-11-23 12:35:08,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5104 to 5084. [2021-11-23 12:35:08,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5084 states, 5083 states have (on average 1.4418650403305135) internal successors, (7329), 5083 states have internal predecessors, (7329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:08,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5084 states to 5084 states and 7329 transitions. [2021-11-23 12:35:08,405 INFO L78 Accepts]: Start accepts. Automaton has 5084 states and 7329 transitions. Word has length 76 [2021-11-23 12:35:08,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:35:08,406 INFO L470 AbstractCegarLoop]: Abstraction has 5084 states and 7329 transitions. [2021-11-23 12:35:08,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:08,408 INFO L276 IsEmpty]: Start isEmpty. Operand 5084 states and 7329 transitions. [2021-11-23 12:35:08,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 12:35:08,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:35:08,416 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 12:35:08,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 12:35:08,417 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:35:08,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:08,418 INFO L85 PathProgramCache]: Analyzing trace with hash 190214622, now seen corresponding path program 1 times [2021-11-23 12:35:08,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:08,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760958432] [2021-11-23 12:35:08,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:08,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:35:08,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:08,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760958432] [2021-11-23 12:35:08,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760958432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:35:08,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:35:08,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:35:08,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305996674] [2021-11-23 12:35:08,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:35:08,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:35:08,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:35:08,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:35:08,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:35:08,561 INFO L87 Difference]: Start difference. First operand 5084 states and 7329 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:08,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:35:08,806 INFO L93 Difference]: Finished difference Result 12198 states and 17548 transitions. [2021-11-23 12:35:08,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:35:08,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-23 12:35:08,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:35:08,863 INFO L225 Difference]: With dead ends: 12198 [2021-11-23 12:35:08,864 INFO L226 Difference]: Without dead ends: 7168 [2021-11-23 12:35:08,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:35:08,875 INFO L933 BasicCegarLoop]: 2083 mSDtfsCounter, 801 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 3378 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:35:08,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [801 Valid, 3378 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:35:08,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7168 states. [2021-11-23 12:35:09,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7168 to 7160. [2021-11-23 12:35:09,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7160 states, 7159 states have (on average 1.4341388462075708) internal successors, (10267), 7159 states have internal predecessors, (10267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:09,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7160 states to 7160 states and 10267 transitions. [2021-11-23 12:35:09,276 INFO L78 Accepts]: Start accepts. Automaton has 7160 states and 10267 transitions. Word has length 81 [2021-11-23 12:35:09,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:35:09,277 INFO L470 AbstractCegarLoop]: Abstraction has 7160 states and 10267 transitions. [2021-11-23 12:35:09,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:09,277 INFO L276 IsEmpty]: Start isEmpty. Operand 7160 states and 10267 transitions. [2021-11-23 12:35:09,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 12:35:09,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:35:09,291 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:35:09,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 12:35:09,291 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:35:09,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:09,295 INFO L85 PathProgramCache]: Analyzing trace with hash -106854149, now seen corresponding path program 1 times [2021-11-23 12:35:09,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:09,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67987171] [2021-11-23 12:35:09,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:09,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:09,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:35:09,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:09,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67987171] [2021-11-23 12:35:09,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67987171] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:35:09,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:35:09,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:35:09,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745672819] [2021-11-23 12:35:09,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:35:09,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:35:09,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:35:09,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:35:09,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:35:09,434 INFO L87 Difference]: Start difference. First operand 7160 states and 10267 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:09,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:35:09,904 INFO L93 Difference]: Finished difference Result 16074 states and 23200 transitions. [2021-11-23 12:35:09,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:35:09,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-11-23 12:35:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:35:09,992 INFO L225 Difference]: With dead ends: 16074 [2021-11-23 12:35:09,994 INFO L226 Difference]: Without dead ends: 8968 [2021-11-23 12:35:10,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:35:10,007 INFO L933 BasicCegarLoop]: 1389 mSDtfsCounter, 802 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 2526 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:35:10,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 2526 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:35:10,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8968 states. [2021-11-23 12:35:10,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8968 to 8948. [2021-11-23 12:35:10,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8948 states, 8947 states have (on average 1.4385827651726837) internal successors, (12871), 8947 states have internal predecessors, (12871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:10,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8948 states to 8948 states and 12871 transitions. [2021-11-23 12:35:10,398 INFO L78 Accepts]: Start accepts. Automaton has 8948 states and 12871 transitions. Word has length 91 [2021-11-23 12:35:10,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:35:10,403 INFO L470 AbstractCegarLoop]: Abstraction has 8948 states and 12871 transitions. [2021-11-23 12:35:10,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:10,404 INFO L276 IsEmpty]: Start isEmpty. Operand 8948 states and 12871 transitions. [2021-11-23 12:35:10,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-23 12:35:10,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:35:10,425 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:35:10,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 12:35:10,426 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:35:10,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:10,427 INFO L85 PathProgramCache]: Analyzing trace with hash 769491891, now seen corresponding path program 1 times [2021-11-23 12:35:10,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:10,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436241329] [2021-11-23 12:35:10,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:10,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:35:10,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:10,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436241329] [2021-11-23 12:35:10,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436241329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:35:10,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:35:10,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:35:10,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491422595] [2021-11-23 12:35:10,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:35:10,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:35:10,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:35:10,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:35:10,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:35:10,565 INFO L87 Difference]: Start difference. First operand 8948 states and 12871 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:11,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:35:11,202 INFO L93 Difference]: Finished difference Result 21521 states and 31070 transitions. [2021-11-23 12:35:11,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:35:11,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 92 [2021-11-23 12:35:11,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:35:11,257 INFO L225 Difference]: With dead ends: 21521 [2021-11-23 12:35:11,257 INFO L226 Difference]: Without dead ends: 16958 [2021-11-23 12:35:11,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:35:11,274 INFO L933 BasicCegarLoop]: 2448 mSDtfsCounter, 1206 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 SdHoareTripleChecker+Valid, 3708 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:35:11,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1206 Valid, 3708 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:35:11,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16958 states. [2021-11-23 12:35:11,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16958 to 9060. [2021-11-23 12:35:11,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9060 states, 9059 states have (on average 1.4331603929793575) internal successors, (12983), 9059 states have internal predecessors, (12983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:11,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9060 states to 9060 states and 12983 transitions. [2021-11-23 12:35:11,893 INFO L78 Accepts]: Start accepts. Automaton has 9060 states and 12983 transitions. Word has length 92 [2021-11-23 12:35:11,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:35:11,893 INFO L470 AbstractCegarLoop]: Abstraction has 9060 states and 12983 transitions. [2021-11-23 12:35:11,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:11,894 INFO L276 IsEmpty]: Start isEmpty. Operand 9060 states and 12983 transitions. [2021-11-23 12:35:11,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 12:35:11,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:35:11,906 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:35:11,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 12:35:11,906 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:35:11,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:11,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1187003022, now seen corresponding path program 1 times [2021-11-23 12:35:11,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:11,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289848599] [2021-11-23 12:35:11,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:11,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:35:12,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:12,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289848599] [2021-11-23 12:35:12,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289848599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:35:12,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:35:12,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:35:12,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681112571] [2021-11-23 12:35:12,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:35:12,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:35:12,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:35:12,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:35:12,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:35:12,054 INFO L87 Difference]: Start difference. First operand 9060 states and 12983 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:13,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:35:13,098 INFO L93 Difference]: Finished difference Result 21737 states and 31213 transitions. [2021-11-23 12:35:13,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:35:13,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 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 94 [2021-11-23 12:35:13,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:35:13,138 INFO L225 Difference]: With dead ends: 21737 [2021-11-23 12:35:13,138 INFO L226 Difference]: Without dead ends: 12731 [2021-11-23 12:35:13,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:35:13,157 INFO L933 BasicCegarLoop]: 2442 mSDtfsCounter, 2269 mSDsluCounter, 2469 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2269 SdHoareTripleChecker+Valid, 4911 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:35:13,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2269 Valid, 4911 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 12:35:13,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12731 states. [2021-11-23 12:35:13,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12731 to 8892. [2021-11-23 12:35:13,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8892 states, 8891 states have (on average 1.4224496682038017) internal successors, (12647), 8891 states have internal predecessors, (12647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:13,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8892 states to 8892 states and 12647 transitions. [2021-11-23 12:35:13,637 INFO L78 Accepts]: Start accepts. Automaton has 8892 states and 12647 transitions. Word has length 94 [2021-11-23 12:35:13,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:35:13,637 INFO L470 AbstractCegarLoop]: Abstraction has 8892 states and 12647 transitions. [2021-11-23 12:35:13,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:13,638 INFO L276 IsEmpty]: Start isEmpty. Operand 8892 states and 12647 transitions. [2021-11-23 12:35:13,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 12:35:13,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:35:13,654 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-23 12:35:13,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 12:35:13,655 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:35:13,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:13,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1409779286, now seen corresponding path program 1 times [2021-11-23 12:35:13,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:13,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063272102] [2021-11-23 12:35:13,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:13,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:35:13,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:13,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063272102] [2021-11-23 12:35:13,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063272102] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:35:13,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:35:13,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:35:13,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710839427] [2021-11-23 12:35:13,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:35:13,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:35:13,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:35:13,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:35:13,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:35:13,766 INFO L87 Difference]: Start difference. First operand 8892 states and 12647 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:14,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:35:14,329 INFO L93 Difference]: Finished difference Result 20612 states and 29245 transitions. [2021-11-23 12:35:14,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:35:14,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 [2021-11-23 12:35:14,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:35:14,363 INFO L225 Difference]: With dead ends: 20612 [2021-11-23 12:35:14,366 INFO L226 Difference]: Without dead ends: 11774 [2021-11-23 12:35:14,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:35:14,381 INFO L933 BasicCegarLoop]: 2182 mSDtfsCounter, 1602 mSDsluCounter, 2756 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1602 SdHoareTripleChecker+Valid, 4938 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:35:14,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1602 Valid, 4938 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:35:14,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11774 states. [2021-11-23 12:35:14,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11774 to 8908. [2021-11-23 12:35:14,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8908 states, 8907 states have (on average 1.4216908049848433) internal successors, (12663), 8907 states have internal predecessors, (12663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:14,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8908 states to 8908 states and 12663 transitions. [2021-11-23 12:35:14,897 INFO L78 Accepts]: Start accepts. Automaton has 8908 states and 12663 transitions. Word has length 123 [2021-11-23 12:35:14,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:35:14,900 INFO L470 AbstractCegarLoop]: Abstraction has 8908 states and 12663 transitions. [2021-11-23 12:35:14,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:14,900 INFO L276 IsEmpty]: Start isEmpty. Operand 8908 states and 12663 transitions. [2021-11-23 12:35:14,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-23 12:35:14,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:35:14,917 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-23 12:35:14,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 12:35:14,917 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:35:14,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:14,918 INFO L85 PathProgramCache]: Analyzing trace with hash 579312434, now seen corresponding path program 1 times [2021-11-23 12:35:14,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:14,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777277246] [2021-11-23 12:35:14,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:14,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:15,122 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 12:35:15,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:15,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777277246] [2021-11-23 12:35:15,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777277246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:35:15,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:35:15,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:35:15,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376072597] [2021-11-23 12:35:15,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:35:15,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:35:15,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:35:15,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:35:15,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:35:15,127 INFO L87 Difference]: Start difference. First operand 8908 states and 12663 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:16,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:35:16,972 INFO L93 Difference]: Finished difference Result 44000 states and 62619 transitions. [2021-11-23 12:35:16,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:35:16,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 130 [2021-11-23 12:35:16,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:35:17,076 INFO L225 Difference]: With dead ends: 44000 [2021-11-23 12:35:17,076 INFO L226 Difference]: Without dead ends: 35146 [2021-11-23 12:35:17,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:35:17,104 INFO L933 BasicCegarLoop]: 2714 mSDtfsCounter, 3892 mSDsluCounter, 4079 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3892 SdHoareTripleChecker+Valid, 6793 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:35:17,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3892 Valid, 6793 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:35:17,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35146 states. [2021-11-23 12:35:17,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35146 to 8924. [2021-11-23 12:35:17,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8924 states, 8923 states have (on average 1.4209346632298554) internal successors, (12679), 8923 states have internal predecessors, (12679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:17,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8924 states to 8924 states and 12679 transitions. [2021-11-23 12:35:17,980 INFO L78 Accepts]: Start accepts. Automaton has 8924 states and 12679 transitions. Word has length 130 [2021-11-23 12:35:17,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:35:17,981 INFO L470 AbstractCegarLoop]: Abstraction has 8924 states and 12679 transitions. [2021-11-23 12:35:17,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:17,982 INFO L276 IsEmpty]: Start isEmpty. Operand 8924 states and 12679 transitions. [2021-11-23 12:35:17,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-23 12:35:17,994 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:35:17,995 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-23 12:35:17,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 12:35:17,995 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:35:17,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:17,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1320782564, now seen corresponding path program 1 times [2021-11-23 12:35:17,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:17,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119668160] [2021-11-23 12:35:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:17,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:35:18,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:18,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119668160] [2021-11-23 12:35:18,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119668160] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:35:18,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003155689] [2021-11-23 12:35:18,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:18,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:35:18,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:35:18,216 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:35:18,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:35:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:18,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 1142 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 12:35:18,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:35:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:35:19,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:35:19,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003155689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:35:19,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 12:35:19,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-23 12:35:19,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588985189] [2021-11-23 12:35:19,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:35:19,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:35:19,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:35:19,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:35:19,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:35:19,177 INFO L87 Difference]: Start difference. First operand 8924 states and 12679 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:20,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:35:20,192 INFO L93 Difference]: Finished difference Result 23326 states and 33052 transitions. [2021-11-23 12:35:20,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 12:35:20,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-23 12:35:20,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:35:20,234 INFO L225 Difference]: With dead ends: 23326 [2021-11-23 12:35:20,235 INFO L226 Difference]: Without dead ends: 14456 [2021-11-23 12:35:20,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-23 12:35:20,251 INFO L933 BasicCegarLoop]: 2964 mSDtfsCounter, 2407 mSDsluCounter, 4877 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2407 SdHoareTripleChecker+Valid, 7841 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:35:20,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2407 Valid, 7841 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:35:20,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14456 states. [2021-11-23 12:35:20,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14456 to 8932. [2021-11-23 12:35:20,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8932 states, 8931 states have (on average 1.420557608330534) internal successors, (12687), 8931 states have internal predecessors, (12687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:20,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8932 states to 8932 states and 12687 transitions. [2021-11-23 12:35:20,889 INFO L78 Accepts]: Start accepts. Automaton has 8932 states and 12687 transitions. Word has length 133 [2021-11-23 12:35:20,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:35:20,889 INFO L470 AbstractCegarLoop]: Abstraction has 8932 states and 12687 transitions. [2021-11-23 12:35:20,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:20,890 INFO L276 IsEmpty]: Start isEmpty. Operand 8932 states and 12687 transitions. [2021-11-23 12:35:20,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-23 12:35:20,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:35:20,900 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-23 12:35:20,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:35:21,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 12:35:21,116 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:35:21,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:21,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1261802453, now seen corresponding path program 1 times [2021-11-23 12:35:21,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:21,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530764943] [2021-11-23 12:35:21,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:21,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:21,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:21,491 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:35:21,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:21,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530764943] [2021-11-23 12:35:21,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530764943] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:35:21,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619112366] [2021-11-23 12:35:21,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:21,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:35:21,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:35:21,497 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:35:21,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 12:35:22,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:22,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 1484 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:35:22,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:35:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:35:22,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:35:22,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619112366] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:35:22,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 12:35:22,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-23 12:35:22,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490540894] [2021-11-23 12:35:22,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:35:22,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:35:22,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:35:22,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:35:22,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:35:22,687 INFO L87 Difference]: Start difference. First operand 8932 states and 12687 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:23,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:35:23,359 INFO L93 Difference]: Finished difference Result 11848 states and 16742 transitions. [2021-11-23 12:35:23,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:35:23,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 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 148 [2021-11-23 12:35:23,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:35:23,401 INFO L225 Difference]: With dead ends: 11848 [2021-11-23 12:35:23,401 INFO L226 Difference]: Without dead ends: 11840 [2021-11-23 12:35:23,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:35:23,408 INFO L933 BasicCegarLoop]: 2102 mSDtfsCounter, 2623 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2623 SdHoareTripleChecker+Valid, 2981 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:35:23,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2623 Valid, 2981 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:35:23,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11840 states. [2021-11-23 12:35:24,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11840 to 10443. [2021-11-23 12:35:24,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10443 states, 10442 states have (on average 1.417448764604482) internal successors, (14801), 10442 states have internal predecessors, (14801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:24,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10443 states to 10443 states and 14801 transitions. [2021-11-23 12:35:24,174 INFO L78 Accepts]: Start accepts. Automaton has 10443 states and 14801 transitions. Word has length 148 [2021-11-23 12:35:24,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:35:24,175 INFO L470 AbstractCegarLoop]: Abstraction has 10443 states and 14801 transitions. [2021-11-23 12:35:24,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:24,175 INFO L276 IsEmpty]: Start isEmpty. Operand 10443 states and 14801 transitions. [2021-11-23 12:35:24,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-23 12:35:24,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:35:24,188 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-23 12:35:24,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:35:24,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 12:35:24,413 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:35:24,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:24,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1944799135, now seen corresponding path program 1 times [2021-11-23 12:35:24,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:24,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555334432] [2021-11-23 12:35:24,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:24,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 12:35:24,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:24,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555334432] [2021-11-23 12:35:24,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555334432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:35:24,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:35:24,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:35:24,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740905503] [2021-11-23 12:35:24,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:35:24,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:35:24,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:35:24,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:35:24,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:35:24,705 INFO L87 Difference]: Start difference. First operand 10443 states and 14801 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:35:25,095 INFO L93 Difference]: Finished difference Result 15614 states and 22148 transitions. [2021-11-23 12:35:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:35:25,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 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 152 [2021-11-23 12:35:25,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:35:25,109 INFO L225 Difference]: With dead ends: 15614 [2021-11-23 12:35:25,110 INFO L226 Difference]: Without dead ends: 4439 [2021-11-23 12:35:25,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:35:25,128 INFO L933 BasicCegarLoop]: 1382 mSDtfsCounter, 1193 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:35:25,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 1472 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:35:25,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4439 states. [2021-11-23 12:35:25,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4439 to 4439. [2021-11-23 12:35:25,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4439 states, 4438 states have (on average 1.4067147363677333) internal successors, (6243), 4438 states have internal predecessors, (6243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:25,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4439 states to 4439 states and 6243 transitions. [2021-11-23 12:35:25,441 INFO L78 Accepts]: Start accepts. Automaton has 4439 states and 6243 transitions. Word has length 152 [2021-11-23 12:35:25,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:35:25,442 INFO L470 AbstractCegarLoop]: Abstraction has 4439 states and 6243 transitions. [2021-11-23 12:35:25,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:25,443 INFO L276 IsEmpty]: Start isEmpty. Operand 4439 states and 6243 transitions. [2021-11-23 12:35:25,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-23 12:35:25,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:35:25,452 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:35:25,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 12:35:25,453 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:35:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:25,453 INFO L85 PathProgramCache]: Analyzing trace with hash 581355538, now seen corresponding path program 1 times [2021-11-23 12:35:25,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:25,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835124566] [2021-11-23 12:35:25,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:25,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 12:35:25,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:25,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835124566] [2021-11-23 12:35:25,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835124566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:35:25,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:35:25,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 12:35:25,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573644497] [2021-11-23 12:35:25,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:35:25,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:35:25,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:35:25,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:35:25,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:35:25,934 INFO L87 Difference]: Start difference. First operand 4439 states and 6243 transitions. Second operand has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:28,228 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 12:35:29,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:35:29,302 INFO L93 Difference]: Finished difference Result 16941 states and 23941 transitions. [2021-11-23 12:35:29,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:35:29,303 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-11-23 12:35:29,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:35:29,333 INFO L225 Difference]: With dead ends: 16941 [2021-11-23 12:35:29,333 INFO L226 Difference]: Without dead ends: 12590 [2021-11-23 12:35:29,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-23 12:35:29,346 INFO L933 BasicCegarLoop]: 2594 mSDtfsCounter, 8029 mSDsluCounter, 11795 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8029 SdHoareTripleChecker+Valid, 14389 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:35:29,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8029 Valid, 14389 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-23 12:35:29,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12590 states. [2021-11-23 12:35:29,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12590 to 4469. [2021-11-23 12:35:29,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4469 states, 4468 states have (on average 1.403983885407341) internal successors, (6273), 4468 states have internal predecessors, (6273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:29,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4469 states to 4469 states and 6273 transitions. [2021-11-23 12:35:29,850 INFO L78 Accepts]: Start accepts. Automaton has 4469 states and 6273 transitions. Word has length 161 [2021-11-23 12:35:29,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:35:29,850 INFO L470 AbstractCegarLoop]: Abstraction has 4469 states and 6273 transitions. [2021-11-23 12:35:29,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:29,851 INFO L276 IsEmpty]: Start isEmpty. Operand 4469 states and 6273 transitions. [2021-11-23 12:35:29,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-23 12:35:29,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:35:29,860 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:35:29,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 12:35:29,861 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:35:29,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:29,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1010912618, now seen corresponding path program 1 times [2021-11-23 12:35:29,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:29,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967181862] [2021-11-23 12:35:29,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:29,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:30,253 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 12:35:30,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:30,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967181862] [2021-11-23 12:35:30,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967181862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:35:30,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:35:30,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 12:35:30,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980046068] [2021-11-23 12:35:30,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:35:30,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:35:30,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:35:30,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:35:30,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:35:30,262 INFO L87 Difference]: Start difference. First operand 4469 states and 6273 transitions. Second operand has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:32,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:35:32,655 INFO L93 Difference]: Finished difference Result 27549 states and 38645 transitions. [2021-11-23 12:35:32,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 12:35:32,655 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2021-11-23 12:35:32,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:35:32,705 INFO L225 Difference]: With dead ends: 27549 [2021-11-23 12:35:32,705 INFO L226 Difference]: Without dead ends: 23168 [2021-11-23 12:35:32,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-11-23 12:35:32,720 INFO L933 BasicCegarLoop]: 3279 mSDtfsCounter, 9643 mSDsluCounter, 11727 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9643 SdHoareTripleChecker+Valid, 15006 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:35:32,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9643 Valid, 15006 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:35:32,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23168 states. [2021-11-23 12:35:33,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23168 to 8896. [2021-11-23 12:35:33,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8896 states, 8895 states have (on average 1.4029229904440697) internal successors, (12479), 8895 states have internal predecessors, (12479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:33,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8896 states to 8896 states and 12479 transitions. [2021-11-23 12:35:33,780 INFO L78 Accepts]: Start accepts. Automaton has 8896 states and 12479 transitions. Word has length 163 [2021-11-23 12:35:33,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:35:33,781 INFO L470 AbstractCegarLoop]: Abstraction has 8896 states and 12479 transitions. [2021-11-23 12:35:33,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:33,781 INFO L276 IsEmpty]: Start isEmpty. Operand 8896 states and 12479 transitions. [2021-11-23 12:35:33,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-23 12:35:33,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:35:33,800 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:35:33,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 12:35:33,801 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:35:33,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:33,802 INFO L85 PathProgramCache]: Analyzing trace with hash 250004632, now seen corresponding path program 1 times [2021-11-23 12:35:33,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:33,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009833162] [2021-11-23 12:35:33,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:33,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:34,338 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 12:35:34,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:34,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009833162] [2021-11-23 12:35:34,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009833162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:35:34,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:35:34,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:35:34,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290575417] [2021-11-23 12:35:34,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:35:34,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:35:34,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:35:34,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:35:34,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:35:34,342 INFO L87 Difference]: Start difference. First operand 8896 states and 12479 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:38,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:35:38,226 INFO L93 Difference]: Finished difference Result 39608 states and 55543 transitions. [2021-11-23 12:35:38,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:35:38,227 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2021-11-23 12:35:38,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:35:38,286 INFO L225 Difference]: With dead ends: 39608 [2021-11-23 12:35:38,287 INFO L226 Difference]: Without dead ends: 30862 [2021-11-23 12:35:38,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:35:38,304 INFO L933 BasicCegarLoop]: 3176 mSDtfsCounter, 4070 mSDsluCounter, 6876 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4070 SdHoareTripleChecker+Valid, 10052 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:35:38,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4070 Valid, 10052 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:35:38,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30862 states. [2021-11-23 12:35:39,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30862 to 8928. [2021-11-23 12:35:39,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8928 states, 8927 states have (on average 1.401478660244203) internal successors, (12511), 8927 states have internal predecessors, (12511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:39,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8928 states to 8928 states and 12511 transitions. [2021-11-23 12:35:39,326 INFO L78 Accepts]: Start accepts. Automaton has 8928 states and 12511 transitions. Word has length 163 [2021-11-23 12:35:39,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:35:39,327 INFO L470 AbstractCegarLoop]: Abstraction has 8928 states and 12511 transitions. [2021-11-23 12:35:39,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:39,328 INFO L276 IsEmpty]: Start isEmpty. Operand 8928 states and 12511 transitions. [2021-11-23 12:35:39,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 12:35:39,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:35:39,341 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:35:39,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 12:35:39,341 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:35:39,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:39,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1934818135, now seen corresponding path program 1 times [2021-11-23 12:35:39,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:39,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469194721] [2021-11-23 12:35:39,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:39,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-23 12:35:39,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:39,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469194721] [2021-11-23 12:35:39,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469194721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:35:39,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:35:39,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:35:39,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383778374] [2021-11-23 12:35:39,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:35:39,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:35:39,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:35:39,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:35:39,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:35:39,731 INFO L87 Difference]: Start difference. First operand 8928 states and 12511 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:40,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:35:40,571 INFO L93 Difference]: Finished difference Result 17782 states and 24935 transitions. [2021-11-23 12:35:40,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:35:40,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-11-23 12:35:40,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:35:40,584 INFO L225 Difference]: With dead ends: 17782 [2021-11-23 12:35:40,585 INFO L226 Difference]: Without dead ends: 8926 [2021-11-23 12:35:40,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:35:40,595 INFO L933 BasicCegarLoop]: 1363 mSDtfsCounter, 6 mSDsluCounter, 4084 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 5447 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:35:40,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 5447 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:35:40,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8926 states. [2021-11-23 12:35:41,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8926 to 8926. [2021-11-23 12:35:41,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8926 states, 8925 states have (on average 1.4011204481792716) internal successors, (12505), 8925 states have internal predecessors, (12505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:41,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8926 states to 8926 states and 12505 transitions. [2021-11-23 12:35:41,617 INFO L78 Accepts]: Start accepts. Automaton has 8926 states and 12505 transitions. Word has length 164 [2021-11-23 12:35:41,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:35:41,617 INFO L470 AbstractCegarLoop]: Abstraction has 8926 states and 12505 transitions. [2021-11-23 12:35:41,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:41,618 INFO L276 IsEmpty]: Start isEmpty. Operand 8926 states and 12505 transitions. [2021-11-23 12:35:41,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 12:35:41,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:35:41,631 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:35:41,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 12:35:41,632 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:35:41,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:41,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1645998745, now seen corresponding path program 1 times [2021-11-23 12:35:41,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:41,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325731062] [2021-11-23 12:35:41,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:41,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 12:35:42,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:42,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325731062] [2021-11-23 12:35:42,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325731062] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:35:42,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:35:42,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-23 12:35:42,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193763220] [2021-11-23 12:35:42,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:35:42,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 12:35:42,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:35:42,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 12:35:42,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:35:42,754 INFO L87 Difference]: Start difference. First operand 8926 states and 12505 transitions. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:48,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:35:48,049 INFO L93 Difference]: Finished difference Result 38368 states and 53829 transitions. [2021-11-23 12:35:48,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 12:35:48,053 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 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 164 [2021-11-23 12:35:48,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:35:48,104 INFO L225 Difference]: With dead ends: 38368 [2021-11-23 12:35:48,104 INFO L226 Difference]: Without dead ends: 29590 [2021-11-23 12:35:48,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-11-23 12:35:48,120 INFO L933 BasicCegarLoop]: 3585 mSDtfsCounter, 13016 mSDsluCounter, 16229 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13016 SdHoareTripleChecker+Valid, 19814 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 12:35:48,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13016 Valid, 19814 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 12:35:48,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29590 states. [2021-11-23 12:35:50,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29590 to 8950. [2021-11-23 12:35:50,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8950 states, 8949 states have (on average 1.3991507430997876) internal successors, (12521), 8949 states have internal predecessors, (12521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:50,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8950 states to 8950 states and 12521 transitions. [2021-11-23 12:35:50,094 INFO L78 Accepts]: Start accepts. Automaton has 8950 states and 12521 transitions. Word has length 164 [2021-11-23 12:35:50,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:35:50,095 INFO L470 AbstractCegarLoop]: Abstraction has 8950 states and 12521 transitions. [2021-11-23 12:35:50,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:50,095 INFO L276 IsEmpty]: Start isEmpty. Operand 8950 states and 12521 transitions. [2021-11-23 12:35:50,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-23 12:35:50,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:35:50,104 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:35:50,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 12:35:50,105 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:35:50,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:50,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1771175730, now seen corresponding path program 1 times [2021-11-23 12:35:50,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:50,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820695485] [2021-11-23 12:35:50,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:50,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:50,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:35:52,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:52,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820695485] [2021-11-23 12:35:52,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820695485] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:35:52,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348098865] [2021-11-23 12:35:52,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:52,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:35:52,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:35:52,025 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:35:52,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2b0e7-e94b-4152-a030-cf25061bc7c6/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 12:35:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:52,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1605 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-23 12:35:52,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:35:53,950 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-23 12:35:53,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 12:35:54,207 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-23 12:35:54,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 30 [2021-11-23 12:35:55,557 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-11-23 12:35:55,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 38 [2021-11-23 12:35:55,976 INFO L354 Elim1Store]: treesize reduction 120, result has 23.6 percent of original size [2021-11-23 12:35:55,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 35 treesize of output 60 [2021-11-23 12:35:57,530 INFO L354 Elim1Store]: treesize reduction 177, result has 35.6 percent of original size [2021-11-23 12:35:57,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 16 case distinctions, treesize of input 54 treesize of output 137 [2021-11-23 12:36:00,264 INFO L354 Elim1Store]: treesize reduction 233, result has 35.8 percent of original size [2021-11-23 12:36:00,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 77 treesize of output 188 [2021-11-23 12:39:19,438 INFO L354 Elim1Store]: treesize reduction 168, result has 40.0 percent of original size [2021-11-23 12:39:19,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 850 treesize of output 795 [2021-11-23 12:39:19,489 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-23 12:39:19,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 797 treesize of output 782 [2021-11-23 12:42:14,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 148 [2021-11-23 12:44:45,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-23 12:44:45,152 INFO L354 Elim1Store]: treesize reduction 88, result has 47.9 percent of original size [2021-11-23 12:44:45,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 153 treesize of output 201 [2021-11-23 12:44:46,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 36 [2021-11-23 12:44:46,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-23 12:44:46,464 INFO L354 Elim1Store]: treesize reduction 34, result has 12.8 percent of original size [2021-11-23 12:44:46,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-11-23 12:44:46,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-23 12:44:46,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 12:44:46,676 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:44:46,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:44:47,995 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_ppp_async_input_~ap#1.offset| Int) (v_DerPreprocessor_1 Int)) (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_ppp_async_input_~ap#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_ppp_async_input_~ap#1.base|) (+ 250 |ULTIMATE.start_ppp_async_input_~ap#1.offset|) v_DerPreprocessor_1)) |c_ULTIMATE.start_ppp_async_input_~skb~2#1.base|) (+ |c_ULTIMATE.start_ppp_async_input_~skb~2#1.offset| 104)) 4294967296) 0)) is different from false [2021-11-23 12:44:49,187 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_ppp_async_input_~ap#1.offset| Int) (v_DerPreprocessor_1 Int) (|v_ULTIMATE.start_ppp_async_input_~skb~2#1.offset_13| Int)) (or (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_ppp_async_input_~ap#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_ppp_async_input_~ap#1.base|) (+ 250 |ULTIMATE.start_ppp_async_input_~ap#1.offset|) v_DerPreprocessor_1)) |c_ULTIMATE.start_ldv_dev_alloc_skb_18_#res#1.base|) (+ 104 |v_ULTIMATE.start_ppp_async_input_~skb~2#1.offset_13|)) 4294967296) 0) (< |v_ULTIMATE.start_ppp_async_input_~skb~2#1.offset_13| |c_ULTIMATE.start_ldv_dev_alloc_skb_18_#res#1.offset|))) is different from false [2021-11-23 12:44:50,350 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_ppp_async_input_~ap#1.offset| Int) (v_DerPreprocessor_1 Int) (|v_ULTIMATE.start_ppp_async_input_~skb~2#1.offset_13| Int)) (or (< |v_ULTIMATE.start_ppp_async_input_~skb~2#1.offset_13| |c_ULTIMATE.start_ldv_skb_alloc_#res#1.offset|) (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_ppp_async_input_~ap#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_ppp_async_input_~ap#1.base|) (+ 250 |ULTIMATE.start_ppp_async_input_~ap#1.offset|) v_DerPreprocessor_1)) |c_ULTIMATE.start_ldv_skb_alloc_#res#1.base|) (+ 104 |v_ULTIMATE.start_ppp_async_input_~skb~2#1.offset_13|)) 4294967296) 0))) is different from false [2021-11-23 12:44:52,393 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_ppp_async_input_~ap#1.offset| Int) (v_DerPreprocessor_1 Int) (|v_ULTIMATE.start_ppp_async_input_~skb~2#1.offset_13| Int)) (or (< |v_ULTIMATE.start_ppp_async_input_~skb~2#1.offset_13| |c_ULTIMATE.start_ldv_skb_alloc_~skb~3#1.offset|) (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_ppp_async_input_~ap#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_ppp_async_input_~ap#1.base|) (+ 250 |ULTIMATE.start_ppp_async_input_~ap#1.offset|) v_DerPreprocessor_1)) |c_ULTIMATE.start_ldv_skb_alloc_~skb~3#1.base|) (+ 104 |v_ULTIMATE.start_ppp_async_input_~skb~2#1.offset_13|)) 4294967296) 0))) is different from false [2021-11-23 12:44:53,858 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_ppp_async_input_~ap#1.offset| Int) (v_DerPreprocessor_2 Int) (v_DerPreprocessor_1 Int) (|v_ULTIMATE.start_ppp_async_input_~skb~2#1.offset_13| Int)) (or (< |v_ULTIMATE.start_ppp_async_input_~skb~2#1.offset_13| |c_ULTIMATE.start_ldv_skb_alloc_~skb~3#1.offset|) (= (mod (select (select (let ((.cse0 (store |c_#memory_int| |c_~#set_impl~0.base| (store (select |c_#memory_int| |c_~#set_impl~0.base|) (+ (* c_~last_index~0 8) |c_~#set_impl~0.offset|) v_DerPreprocessor_2)))) (store .cse0 |c_ULTIMATE.start_ppp_async_input_~ap#1.base| (store (select .cse0 |c_ULTIMATE.start_ppp_async_input_~ap#1.base|) (+ 250 |ULTIMATE.start_ppp_async_input_~ap#1.offset|) v_DerPreprocessor_1))) |c_ULTIMATE.start_ldv_skb_alloc_~skb~3#1.base|) (+ 104 |v_ULTIMATE.start_ppp_async_input_~skb~2#1.offset_13|)) 4294967296) 0))) is different from false [2021-11-23 12:44:55,451 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_ppp_async_input_~ap#1.offset| Int) (v_DerPreprocessor_2 Int) (v_DerPreprocessor_1 Int) (|v_ULTIMATE.start_ppp_async_input_~skb~2#1.offset_13| Int)) (or (< |v_ULTIMATE.start_ppp_async_input_~skb~2#1.offset_13| |c_ULTIMATE.start_ldv_zalloc_#res#1.offset|) (= (mod (select (select (let ((.cse0 (store |c_#memory_int| |c_~#set_impl~0.base| (store (select |c_#memory_int| |c_~#set_impl~0.base|) (+ (* c_~last_index~0 8) |c_~#set_impl~0.offset|) v_DerPreprocessor_2)))) (store .cse0 |c_ULTIMATE.start_ppp_async_input_~ap#1.base| (store (select .cse0 |c_ULTIMATE.start_ppp_async_input_~ap#1.base|) (+ 250 |ULTIMATE.start_ppp_async_input_~ap#1.offset|) v_DerPreprocessor_1))) |c_ULTIMATE.start_ldv_zalloc_#res#1.base|) (+ 104 |v_ULTIMATE.start_ppp_async_input_~skb~2#1.offset_13|)) 4294967296) 0))) is different from false [2021-11-23 12:44:56,947 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_ppp_async_input_~ap#1.offset| Int) (v_DerPreprocessor_2 Int) (v_DerPreprocessor_1 Int) (|v_ULTIMATE.start_ppp_async_input_~skb~2#1.offset_13| Int)) (or (< |v_ULTIMATE.start_ppp_async_input_~skb~2#1.offset_13| |c_ULTIMATE.start_ldv_zalloc_~p~1#1.offset|) (= (mod (select (select (let ((.cse0 (store |c_#memory_int| |c_~#set_impl~0.base| (store (select |c_#memory_int| |c_~#set_impl~0.base|) (+ (* c_~last_index~0 8) |c_~#set_impl~0.offset|) v_DerPreprocessor_2)))) (store .cse0 |c_ULTIMATE.start_ppp_async_input_~ap#1.base| (store (select .cse0 |c_ULTIMATE.start_ppp_async_input_~ap#1.base|) (+ 250 |ULTIMATE.start_ppp_async_input_~ap#1.offset|) v_DerPreprocessor_1))) |c_ULTIMATE.start_ldv_zalloc_~p~1#1.base|) (+ 104 |v_ULTIMATE.start_ppp_async_input_~skb~2#1.offset_13|)) 4294967296) 0))) is different from false [2021-11-23 12:44:59,046 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_ppp_async_input_~ap#1.offset| Int) (v_DerPreprocessor_2 Int) (v_DerPreprocessor_1 Int) (|v_ULTIMATE.start_ppp_async_input_~skb~2#1.offset_13| Int)) (or (= (mod (select (select (let ((.cse0 (store |c_#memory_int| |c_~#set_impl~0.base| (store (select |c_#memory_int| |c_~#set_impl~0.base|) (+ (* c_~last_index~0 8) |c_~#set_impl~0.offset|) v_DerPreprocessor_2)))) (store .cse0 |c_ULTIMATE.start_ppp_async_input_~ap#1.base| (store (select .cse0 |c_ULTIMATE.start_ppp_async_input_~ap#1.base|) (+ 250 |ULTIMATE.start_ppp_async_input_~ap#1.offset|) v_DerPreprocessor_1))) |c_ULTIMATE.start_ldv_zalloc_#t~malloc78#1.base|) (+ 104 |v_ULTIMATE.start_ppp_async_input_~skb~2#1.offset_13|)) 4294967296) 0) (< |v_ULTIMATE.start_ppp_async_input_~skb~2#1.offset_13| |c_ULTIMATE.start_ldv_zalloc_#t~malloc78#1.offset|))) is different from false [2021-11-23 12:44:59,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:44:59,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1264 treesize of output 1244 [2021-11-23 12:44:59,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 720 treesize of output 688 [2021-11-23 12:44:59,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 890 treesize of output 874