./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.v_Unidec.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.v_Unidec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d6d4a223111603731feae03c3b8e999e521ed8b7a92f24be8e01d0595b640900 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:49:32,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:49:32,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:49:32,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:49:32,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:49:32,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:49:32,692 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:49:32,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:49:32,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:49:32,706 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:49:32,707 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:49:32,709 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:49:32,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:49:32,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:49:32,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:49:32,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:49:32,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:49:32,719 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:49:32,721 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:49:32,728 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:49:32,730 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:49:32,732 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:49:32,735 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:49:32,737 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:49:32,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:49:32,742 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:49:32,742 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:49:32,744 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:49:32,745 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:49:32,746 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:49:32,747 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:49:32,748 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:49:32,750 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:49:32,751 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:49:32,752 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:49:32,753 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:49:32,754 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:49:32,754 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:49:32,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:49:32,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:49:32,756 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:49:32,757 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:49:32,795 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:49:32,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:49:32,796 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:49:32,796 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:49:32,797 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:49:32,797 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:49:32,798 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:49:32,798 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:49:32,798 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:49:32,798 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:49:32,799 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:49:32,800 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:49:32,800 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:49:32,800 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:49:32,800 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:49:32,800 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:49:32,801 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:49:32,801 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:49:32,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:49:32,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:49:32,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:49:32,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:49:32,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:49:32,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:49:32,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:49:32,805 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:49:32,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:49:32,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:49:32,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:49:32,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:49:32,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:49:32,806 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:49:32,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:49:32,807 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:49:32,807 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:49:32,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:49:32,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:49:32,807 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:49:32,808 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_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6d4a223111603731feae03c3b8e999e521ed8b7a92f24be8e01d0595b640900 [2022-11-03 02:49:33,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:49:33,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:49:33,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:49:33,083 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:49:33,084 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:49:33,091 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.v_Unidec.c [2022-11-03 02:49:33,170 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/data/f7e34215e/ebf9a0caa2b64d758c4b776c8c3e272e/FLAG6318d70e3 [2022-11-03 02:49:33,810 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:49:33,811 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.v_Unidec.c [2022-11-03 02:49:33,823 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/data/f7e34215e/ebf9a0caa2b64d758c4b776c8c3e272e/FLAG6318d70e3 [2022-11-03 02:49:34,070 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/data/f7e34215e/ebf9a0caa2b64d758c4b776c8c3e272e [2022-11-03 02:49:34,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:49:34,074 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:49:34,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:49:34,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:49:34,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:49:34,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:49:34" (1/1) ... [2022-11-03 02:49:34,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2acc6a7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34, skipping insertion in model container [2022-11-03 02:49:34,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:49:34" (1/1) ... [2022-11-03 02:49:34,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:49:34,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:49:34,349 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_3d1fd634-ff99-4562-b221-10eb099f365d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.v_Unidec.c[1107,1120] [2022-11-03 02:49:34,529 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:49:34,545 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:49:34,556 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_3d1fd634-ff99-4562-b221-10eb099f365d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.v_Unidec.c[1107,1120] [2022-11-03 02:49:34,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:49:34,658 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:49:34,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34 WrapperNode [2022-11-03 02:49:34,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:49:34,670 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:49:34,671 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:49:34,671 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:49:34,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34" (1/1) ... [2022-11-03 02:49:34,705 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34" (1/1) ... [2022-11-03 02:49:34,805 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 823 [2022-11-03 02:49:34,805 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:49:34,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:49:34,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:49:34,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:49:34,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34" (1/1) ... [2022-11-03 02:49:34,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34" (1/1) ... [2022-11-03 02:49:34,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34" (1/1) ... [2022-11-03 02:49:34,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34" (1/1) ... [2022-11-03 02:49:34,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34" (1/1) ... [2022-11-03 02:49:34,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34" (1/1) ... [2022-11-03 02:49:34,910 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34" (1/1) ... [2022-11-03 02:49:34,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34" (1/1) ... [2022-11-03 02:49:34,933 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:49:34,934 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:49:34,934 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:49:34,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:49:34,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34" (1/1) ... [2022-11-03 02:49:34,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:49:34,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:34,976 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:49:34,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:49:35,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:49:35,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:49:35,272 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:49:35,274 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:49:39,616 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:49:40,857 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:49:40,857 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:49:40,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:49:40 BoogieIcfgContainer [2022-11-03 02:49:40,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:49:40,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:49:40,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:49:40,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:49:40,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:49:34" (1/3) ... [2022-11-03 02:49:40,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@260cbfaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:49:40, skipping insertion in model container [2022-11-03 02:49:40,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:34" (2/3) ... [2022-11-03 02:49:40,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@260cbfaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:49:40, skipping insertion in model container [2022-11-03 02:49:40,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:49:40" (3/3) ... [2022-11-03 02:49:40,871 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.v_Unidec.c [2022-11-03 02:49:40,889 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:49:40,889 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:49:40,956 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:49:40,974 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2ddca1c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:49:40,975 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:49:40,979 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:40,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:49:40,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:40,988 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:49:40,989 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:40,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:40,997 INFO L85 PathProgramCache]: Analyzing trace with hash 11419981, now seen corresponding path program 1 times [2022-11-03 02:49:41,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:49:41,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998390098] [2022-11-03 02:49:41,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:41,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:49:41,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:49:41,276 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:49:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:49:41,463 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:49:41,465 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:49:41,467 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:49:41,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:49:41,474 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:49:41,479 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:49:41,516 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:49:41,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:49:41 BoogieIcfgContainer [2022-11-03 02:49:41,529 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:49:41,531 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:49:41,531 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:49:41,532 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:49:41,533 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:49:40" (3/4) ... [2022-11-03 02:49:41,537 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:49:41,537 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:49:41,540 INFO L158 Benchmark]: Toolchain (without parser) took 7464.95ms. Allocated memory was 119.5MB in the beginning and 182.5MB in the end (delta: 62.9MB). Free memory was 81.1MB in the beginning and 97.8MB in the end (delta: -16.6MB). Peak memory consumption was 46.7MB. Max. memory is 16.1GB. [2022-11-03 02:49:41,540 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 119.5MB. Free memory is still 99.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:49:41,541 INFO L158 Benchmark]: CACSL2BoogieTranslator took 593.30ms. Allocated memory is still 119.5MB. Free memory was 81.0MB in the beginning and 78.9MB in the end (delta: 2.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 02:49:41,543 INFO L158 Benchmark]: Boogie Procedure Inliner took 135.23ms. Allocated memory is still 119.5MB. Free memory was 78.9MB in the beginning and 68.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 02:49:41,544 INFO L158 Benchmark]: Boogie Preprocessor took 127.30ms. Allocated memory is still 119.5MB. Free memory was 68.4MB in the beginning and 63.1MB in the end (delta: 5.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 02:49:41,549 INFO L158 Benchmark]: RCFGBuilder took 5925.77ms. Allocated memory was 119.5MB in the beginning and 182.5MB in the end (delta: 62.9MB). Free memory was 63.1MB in the beginning and 133.4MB in the end (delta: -70.3MB). Peak memory consumption was 76.4MB. Max. memory is 16.1GB. [2022-11-03 02:49:41,550 INFO L158 Benchmark]: TraceAbstraction took 667.09ms. Allocated memory is still 182.5MB. Free memory was 132.4MB in the beginning and 97.8MB in the end (delta: 34.6MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2022-11-03 02:49:41,551 INFO L158 Benchmark]: Witness Printer took 6.81ms. Allocated memory is still 182.5MB. Free memory is still 97.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:49:41,559 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 119.5MB. Free memory is still 99.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 593.30ms. Allocated memory is still 119.5MB. Free memory was 81.0MB in the beginning and 78.9MB in the end (delta: 2.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 135.23ms. Allocated memory is still 119.5MB. Free memory was 78.9MB in the beginning and 68.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 127.30ms. Allocated memory is still 119.5MB. Free memory was 68.4MB in the beginning and 63.1MB in the end (delta: 5.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 5925.77ms. Allocated memory was 119.5MB in the beginning and 182.5MB in the end (delta: 62.9MB). Free memory was 63.1MB in the beginning and 133.4MB in the end (delta: -70.3MB). Peak memory consumption was 76.4MB. Max. memory is 16.1GB. * TraceAbstraction took 667.09ms. Allocated memory is still 182.5MB. Free memory was 132.4MB in the beginning and 97.8MB in the end (delta: 34.6MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. * Witness Printer took 6.81ms. Allocated memory is still 182.5MB. Free memory is still 97.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 157, overapproximation of bitwiseAnd at line 128. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 3); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (3 - 1); [L31] const SORT_5 mask_SORT_5 = (SORT_5)-1 >> (sizeof(SORT_5) * 8 - 2); [L32] const SORT_5 msb_SORT_5 = (SORT_5)1 << (2 - 1); [L34] const SORT_10 mask_SORT_10 = (SORT_10)-1 >> (sizeof(SORT_10) * 8 - 32); [L35] const SORT_10 msb_SORT_10 = (SORT_10)1 << (32 - 1); [L37] const SORT_22 mask_SORT_22 = (SORT_22)-1 >> (sizeof(SORT_22) * 8 - 16); [L38] const SORT_22 msb_SORT_22 = (SORT_22)1 << (16 - 1); [L40] const SORT_68 mask_SORT_68 = (SORT_68)-1 >> (sizeof(SORT_68) * 8 - 13); [L41] const SORT_68 msb_SORT_68 = (SORT_68)1 << (13 - 1); [L43] const SORT_71 mask_SORT_71 = (SORT_71)-1 >> (sizeof(SORT_71) * 8 - 6); [L44] const SORT_71 msb_SORT_71 = (SORT_71)1 << (6 - 1); [L46] const SORT_73 mask_SORT_73 = (SORT_73)-1 >> (sizeof(SORT_73) * 8 - 10); [L47] const SORT_73 msb_SORT_73 = (SORT_73)1 << (10 - 1); [L49] const SORT_79 mask_SORT_79 = (SORT_79)-1 >> (sizeof(SORT_79) * 8 - 9); [L50] const SORT_79 msb_SORT_79 = (SORT_79)1 << (9 - 1); [L52] const SORT_81 mask_SORT_81 = (SORT_81)-1 >> (sizeof(SORT_81) * 8 - 7); [L53] const SORT_81 msb_SORT_81 = (SORT_81)1 << (7 - 1); [L55] const SORT_84 mask_SORT_84 = (SORT_84)-1 >> (sizeof(SORT_84) * 8 - 12); [L56] const SORT_84 msb_SORT_84 = (SORT_84)1 << (12 - 1); [L58] const SORT_86 mask_SORT_86 = (SORT_86)-1 >> (sizeof(SORT_86) * 8 - 4); [L59] const SORT_86 msb_SORT_86 = (SORT_86)1 << (4 - 1); [L61] const SORT_1 var_7 = 0; [L62] const SORT_10 var_12 = 0; [L63] const SORT_1 var_16 = 1; [L64] const SORT_22 var_23 = 8; [L65] const SORT_22 var_24 = 10; [L66] const SORT_3 var_25 = 1; [L67] const SORT_22 var_28 = 88; [L68] const SORT_22 var_29 = 584; [L69] const SORT_3 var_30 = 3; [L70] const SORT_3 var_33 = 2; [L71] const SORT_22 var_37 = 705; [L72] const SORT_22 var_38 = 611; [L73] const SORT_3 var_39 = 5; [L74] const SORT_22 var_42 = 50825; [L75] const SORT_3 var_43 = 7; [L76] const SORT_3 var_46 = 6; [L77] const SORT_3 var_50 = 4; [L78] const SORT_22 var_65 = 0; [L79] const SORT_3 var_67 = 0; [L80] const SORT_71 var_72 = 0; [L81] const SORT_5 var_76 = 1; [L82] const SORT_79 var_80 = 0; [L83] const SORT_84 var_85 = 0; [L84] const SORT_5 var_89 = 3; [L85] const SORT_5 var_92 = 2; [L86] const SORT_68 var_97 = 1; [L87] const SORT_22 var_100 = 32767; [L88] const SORT_5 var_105 = 0; [L89] const SORT_73 var_119 = 1; [L90] const SORT_81 var_131 = 1; [L91] const SORT_86 var_141 = 1; [L93] SORT_1 input_2; [L94] SORT_3 input_4; [L95] SORT_5 input_6; [L96] SORT_22 input_66; [L97] SORT_22 input_96; [L98] SORT_22 input_108; [L99] SORT_22 input_109; [L100] SORT_22 input_118; [L101] SORT_22 input_130; [L102] SORT_22 input_140; [L103] SORT_22 input_157; [L104] SORT_22 input_166; [L105] SORT_22 input_170; [L106] SORT_22 input_179; [L107] SORT_22 input_181; [L108] SORT_22 input_190; [L109] SORT_22 input_197; [L110] SORT_22 input_201; [L111] SORT_22 input_204; [L112] SORT_22 input_206; [L114] SORT_1 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L115] SORT_1 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L116] SORT_22 state_58 = __VERIFIER_nondet_ushort() & mask_SORT_22; [L118] SORT_1 init_9_arg_1 = var_7; [L119] state_8 = init_9_arg_1 [L120] SORT_1 init_21_arg_1 = var_16; [L121] state_20 = init_21_arg_1 [L122] SORT_22 init_59_arg_1 = var_23; [L123] state_58 = init_59_arg_1 VAL [init_21_arg_1=1, init_59_arg_1=8, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_10=4294967295, mask_SORT_22=65535, mask_SORT_3=7, mask_SORT_5=3, mask_SORT_68=8191, mask_SORT_71=63, mask_SORT_73=1023, mask_SORT_79=511, mask_SORT_81=127, mask_SORT_84=4095, mask_SORT_86=15, msb_SORT_1=1, msb_SORT_10=2147483648, msb_SORT_22=32768, msb_SORT_3=4, msb_SORT_5=2, msb_SORT_68=4096, msb_SORT_71=32, msb_SORT_73=512, msb_SORT_79=256, msb_SORT_81=64, msb_SORT_84=2048, msb_SORT_86=8, state_20=1, state_58=8, state_8=0, var_100=32767, var_105=0, var_119=1, var_12=0, var_131=1, var_141=1, var_16=1, var_23=8, var_24=10, var_25=1, var_28=88, var_29=584, var_30=3, var_33=2, var_37=705, var_38=611, var_39=5, var_42=50825, var_43=7, var_46=6, var_50=4, var_65=0, var_67=0, var_7=0, var_72=0, var_76=1, var_80=0, var_85=0, var_89=3, var_92=2, var_97=1] [L126] input_2 = __VERIFIER_nondet_uchar() [L127] input_4 = __VERIFIER_nondet_uchar() [L128] input_4 = input_4 & mask_SORT_3 [L129] input_6 = __VERIFIER_nondet_uchar() [L130] input_6 = input_6 & mask_SORT_5 [L131] input_66 = __VERIFIER_nondet_ushort() [L132] input_96 = __VERIFIER_nondet_ushort() [L133] input_108 = __VERIFIER_nondet_ushort() [L134] input_109 = __VERIFIER_nondet_ushort() [L135] input_118 = __VERIFIER_nondet_ushort() [L136] input_130 = __VERIFIER_nondet_ushort() [L137] input_140 = __VERIFIER_nondet_ushort() [L138] input_157 = __VERIFIER_nondet_ushort() [L139] input_166 = __VERIFIER_nondet_ushort() [L140] input_170 = __VERIFIER_nondet_ushort() [L141] input_179 = __VERIFIER_nondet_ushort() [L142] input_181 = __VERIFIER_nondet_ushort() [L143] input_190 = __VERIFIER_nondet_ushort() [L144] input_197 = __VERIFIER_nondet_ushort() [L145] input_201 = __VERIFIER_nondet_ushort() [L146] input_204 = __VERIFIER_nondet_ushort() [L147] input_206 = __VERIFIER_nondet_ushort() [L150] SORT_1 var_11_arg_0 = state_8; [L151] var_11_arg_0 = var_11_arg_0 & mask_SORT_1 [L152] SORT_10 var_11 = var_11_arg_0; [L153] SORT_10 var_13_arg_0 = var_11; [L154] SORT_10 var_13_arg_1 = var_12; [L155] SORT_1 var_13 = var_13_arg_0 == var_13_arg_1; [L156] SORT_1 var_17_arg_0 = var_13; [L157] SORT_1 var_17 = ~var_17_arg_0; [L158] SORT_1 var_18_arg_0 = var_16; [L159] SORT_1 var_18_arg_1 = var_17; [L160] SORT_1 var_18 = var_18_arg_0 & var_18_arg_1; [L161] var_18 = var_18 & mask_SORT_1 [L162] SORT_1 bad_19_arg_0 = var_18; [L163] CALL __VERIFIER_assert(!(bad_19_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:49:41,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.v_Unidec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d6d4a223111603731feae03c3b8e999e521ed8b7a92f24be8e01d0595b640900 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:49:43,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:49:43,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:49:43,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:49:43,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:49:43,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:49:43,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:49:43,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:49:43,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:49:43,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:49:43,995 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:49:43,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:49:43,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:49:44,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:49:44,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:49:44,004 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:49:44,006 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:49:44,007 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:49:44,009 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:49:44,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:49:44,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:49:44,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:49:44,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:49:44,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:49:44,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:49:44,042 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:49:44,042 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:49:44,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:49:44,045 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:49:44,046 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:49:44,046 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:49:44,047 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:49:44,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:49:44,050 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:49:44,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:49:44,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:49:44,053 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:49:44,053 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:49:44,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:49:44,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:49:44,056 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:49:44,061 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:49:44,101 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:49:44,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:49:44,103 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:49:44,103 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:49:44,104 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:49:44,105 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:49:44,105 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:49:44,105 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:49:44,105 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:49:44,106 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:49:44,107 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:49:44,107 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:49:44,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:49:44,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:49:44,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:49:44,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:49:44,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:49:44,110 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:49:44,110 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:49:44,110 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:49:44,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:49:44,111 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:49:44,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:49:44,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:49:44,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:49:44,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:49:44,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:49:44,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:49:44,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:49:44,113 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:49:44,113 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:49:44,113 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:49:44,114 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:49:44,114 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:49:44,114 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:49:44,115 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6d4a223111603731feae03c3b8e999e521ed8b7a92f24be8e01d0595b640900 [2022-11-03 02:49:44,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:49:44,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:49:44,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:49:44,580 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:49:44,581 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:49:44,582 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.v_Unidec.c [2022-11-03 02:49:44,654 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/data/fd80c098b/ef60af50b4514471a729772323b7aaf1/FLAG6a4c5979d [2022-11-03 02:49:45,230 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:49:45,231 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.v_Unidec.c [2022-11-03 02:49:45,244 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/data/fd80c098b/ef60af50b4514471a729772323b7aaf1/FLAG6a4c5979d [2022-11-03 02:49:45,543 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/data/fd80c098b/ef60af50b4514471a729772323b7aaf1 [2022-11-03 02:49:45,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:49:45,547 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:49:45,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:49:45,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:49:45,556 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:49:45,557 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:49:45" (1/1) ... [2022-11-03 02:49:45,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@712cb4bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:45, skipping insertion in model container [2022-11-03 02:49:45,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:49:45" (1/1) ... [2022-11-03 02:49:45,566 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:49:45,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:49:45,783 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_3d1fd634-ff99-4562-b221-10eb099f365d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.v_Unidec.c[1107,1120] [2022-11-03 02:49:46,041 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:49:46,045 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:49:46,056 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_3d1fd634-ff99-4562-b221-10eb099f365d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.v_Unidec.c[1107,1120] [2022-11-03 02:49:46,131 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:49:46,144 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:49:46,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:46 WrapperNode [2022-11-03 02:49:46,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:49:46,145 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:49:46,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:49:46,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:49:46,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:46" (1/1) ... [2022-11-03 02:49:46,171 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:46" (1/1) ... [2022-11-03 02:49:46,240 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 823 [2022-11-03 02:49:46,241 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:49:46,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:49:46,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:49:46,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:49:46,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:46" (1/1) ... [2022-11-03 02:49:46,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:46" (1/1) ... [2022-11-03 02:49:46,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:46" (1/1) ... [2022-11-03 02:49:46,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:46" (1/1) ... [2022-11-03 02:49:46,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:46" (1/1) ... [2022-11-03 02:49:46,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:46" (1/1) ... [2022-11-03 02:49:46,315 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:46" (1/1) ... [2022-11-03 02:49:46,329 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:46" (1/1) ... [2022-11-03 02:49:46,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:49:46,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:49:46,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:49:46,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:49:46,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:46" (1/1) ... [2022-11-03 02:49:46,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:49:46,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:46,388 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:49:46,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:49:46,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:49:46,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:49:46,628 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:49:46,630 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:49:47,574 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:49:47,582 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:49:47,583 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:49:47,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:49:47 BoogieIcfgContainer [2022-11-03 02:49:47,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:49:47,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:49:47,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:49:47,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:49:47,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:49:45" (1/3) ... [2022-11-03 02:49:47,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@389e9bdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:49:47, skipping insertion in model container [2022-11-03 02:49:47,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:46" (2/3) ... [2022-11-03 02:49:47,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@389e9bdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:49:47, skipping insertion in model container [2022-11-03 02:49:47,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:49:47" (3/3) ... [2022-11-03 02:49:47,600 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.v_Unidec.c [2022-11-03 02:49:47,620 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:49:47,620 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:49:47,707 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:49:47,712 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6e6c2fe8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:49:47,713 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:49:47,717 INFO L276 IsEmpty]: Start isEmpty. Operand has 103 states, 101 states have (on average 1.495049504950495) internal successors, (151), 102 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:47,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:49:47,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:47,723 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:49:47,723 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:47,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:47,729 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 02:49:47,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:47,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128889565] [2022-11-03 02:49:47,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:47,743 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:47,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:47,750 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:47,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:49:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:48,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:49:48,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:48,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:48,183 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:48,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128889565] [2022-11-03 02:49:48,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128889565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:48,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:49:48,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:49:48,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357664099] [2022-11-03 02:49:48,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:48,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:49:48,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:48,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:49:48,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:49:48,236 INFO L87 Difference]: Start difference. First operand has 103 states, 101 states have (on average 1.495049504950495) internal successors, (151), 102 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:48,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:48,473 INFO L93 Difference]: Finished difference Result 296 states and 444 transitions. [2022-11-03 02:49:48,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:49:48,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 02:49:48,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:48,497 INFO L225 Difference]: With dead ends: 296 [2022-11-03 02:49:48,498 INFO L226 Difference]: Without dead ends: 195 [2022-11-03 02:49:48,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:49:48,505 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 280 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:48,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 404 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:49:48,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-03 02:49:48,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 101. [2022-11-03 02:49:48,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.47) internal successors, (147), 100 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:48,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 147 transitions. [2022-11-03 02:49:48,549 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 147 transitions. Word has length 5 [2022-11-03 02:49:48,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:48,550 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 147 transitions. [2022-11-03 02:49:48,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:48,550 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 147 transitions. [2022-11-03 02:49:48,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:49:48,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:48,554 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:48,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:48,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:48,767 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:48,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:48,767 INFO L85 PathProgramCache]: Analyzing trace with hash -2093197609, now seen corresponding path program 1 times [2022-11-03 02:49:48,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:48,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [433745513] [2022-11-03 02:49:48,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:48,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:48,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:48,771 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:48,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:49:49,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:49,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:49:49,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:49,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:49,349 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:49,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [433745513] [2022-11-03 02:49:49,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [433745513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:49,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:49:49,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:49:49,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910451975] [2022-11-03 02:49:49,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:49,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:49:49,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:49,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:49:49,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:49:49,353 INFO L87 Difference]: Start difference. First operand 101 states and 147 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:49,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:49,552 INFO L93 Difference]: Finished difference Result 391 states and 575 transitions. [2022-11-03 02:49:49,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:49:49,553 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:49:49,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:49,554 INFO L225 Difference]: With dead ends: 391 [2022-11-03 02:49:49,555 INFO L226 Difference]: Without dead ends: 294 [2022-11-03 02:49:49,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:49:49,557 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 957 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:49,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [957 Valid, 562 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:49:49,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-11-03 02:49:49,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 107. [2022-11-03 02:49:49,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.4622641509433962) internal successors, (155), 106 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:49,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 155 transitions. [2022-11-03 02:49:49,568 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 155 transitions. Word has length 100 [2022-11-03 02:49:49,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:49,569 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 155 transitions. [2022-11-03 02:49:49,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:49,569 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 155 transitions. [2022-11-03 02:49:49,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:49:49,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:49,572 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:49,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:49,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:49,796 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:49,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:49,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1431036121, now seen corresponding path program 1 times [2022-11-03 02:49:49,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:49,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974722073] [2022-11-03 02:49:49,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:49,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:49,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:49,804 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:49,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:49:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:50,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:49:50,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:50,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:50,407 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:50,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974722073] [2022-11-03 02:49:50,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974722073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:50,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:49:50,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:49:50,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944897493] [2022-11-03 02:49:50,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:50,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:49:50,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:50,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:49:50,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:49:50,410 INFO L87 Difference]: Start difference. First operand 107 states and 155 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:50,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:50,618 INFO L93 Difference]: Finished difference Result 399 states and 584 transitions. [2022-11-03 02:49:50,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:49:50,619 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:49:50,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:50,622 INFO L225 Difference]: With dead ends: 399 [2022-11-03 02:49:50,622 INFO L226 Difference]: Without dead ends: 296 [2022-11-03 02:49:50,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:49:50,628 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 951 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:50,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [951 Valid, 564 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:49:50,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-11-03 02:49:50,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 109. [2022-11-03 02:49:50,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.4537037037037037) internal successors, (157), 108 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:50,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 157 transitions. [2022-11-03 02:49:50,651 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 157 transitions. Word has length 100 [2022-11-03 02:49:50,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:50,652 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 157 transitions. [2022-11-03 02:49:50,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:50,652 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 157 transitions. [2022-11-03 02:49:50,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:49:50,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:50,658 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:50,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:50,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:50,874 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:50,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:50,875 INFO L85 PathProgramCache]: Analyzing trace with hash 844759899, now seen corresponding path program 1 times [2022-11-03 02:49:50,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:50,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296844166] [2022-11-03 02:49:50,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:50,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:50,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:50,879 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:50,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:49:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:51,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:49:51,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:51,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:51,503 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:51,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1296844166] [2022-11-03 02:49:51,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1296844166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:51,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:49:51,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:49:51,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472815232] [2022-11-03 02:49:51,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:51,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:49:51,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:51,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:49:51,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:49:51,506 INFO L87 Difference]: Start difference. First operand 109 states and 157 transitions. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:51,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:51,957 INFO L93 Difference]: Finished difference Result 418 states and 607 transitions. [2022-11-03 02:49:51,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:49:51,958 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:49:51,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:51,959 INFO L225 Difference]: With dead ends: 418 [2022-11-03 02:49:51,959 INFO L226 Difference]: Without dead ends: 313 [2022-11-03 02:49:51,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:49:51,961 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 1106 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1106 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:51,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1106 Valid, 807 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:49:51,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-03 02:49:51,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 111. [2022-11-03 02:49:51,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.4454545454545455) internal successors, (159), 110 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:51,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 159 transitions. [2022-11-03 02:49:51,968 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 159 transitions. Word has length 100 [2022-11-03 02:49:51,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:51,968 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 159 transitions. [2022-11-03 02:49:51,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:51,969 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 159 transitions. [2022-11-03 02:49:51,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:49:51,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:51,970 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:51,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:52,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:52,186 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:52,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:52,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1573724579, now seen corresponding path program 1 times [2022-11-03 02:49:52,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:52,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1680393032] [2022-11-03 02:49:52,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:52,188 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:52,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:52,189 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:52,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:49:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:52,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:49:52,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:52,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:52,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:52,896 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:52,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1680393032] [2022-11-03 02:49:52,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1680393032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:52,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:49:52,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:49:52,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683311226] [2022-11-03 02:49:52,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:52,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:49:52,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:52,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:49:52,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:49:52,905 INFO L87 Difference]: Start difference. First operand 111 states and 159 transitions. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:53,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:53,698 INFO L93 Difference]: Finished difference Result 450 states and 646 transitions. [2022-11-03 02:49:53,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:49:53,699 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:49:53,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:53,700 INFO L225 Difference]: With dead ends: 450 [2022-11-03 02:49:53,701 INFO L226 Difference]: Without dead ends: 343 [2022-11-03 02:49:53,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:49:53,702 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 1379 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1379 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:53,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1379 Valid, 703 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:49:53,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-11-03 02:49:53,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 113. [2022-11-03 02:49:53,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.4375) internal successors, (161), 112 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:53,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 161 transitions. [2022-11-03 02:49:53,721 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 161 transitions. Word has length 100 [2022-11-03 02:49:53,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:53,722 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 161 transitions. [2022-11-03 02:49:53,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:53,723 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 161 transitions. [2022-11-03 02:49:53,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:49:53,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:53,728 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:53,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:53,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:53,950 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:53,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:53,951 INFO L85 PathProgramCache]: Analyzing trace with hash 810200159, now seen corresponding path program 1 times [2022-11-03 02:49:53,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:53,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011641789] [2022-11-03 02:49:53,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:53,952 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:53,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:53,953 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:53,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:49:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:54,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:49:54,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:54,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:54,587 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:54,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011641789] [2022-11-03 02:49:54,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011641789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:54,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:49:54,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:49:54,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499945902] [2022-11-03 02:49:54,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:54,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:49:54,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:54,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:49:54,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:49:54,590 INFO L87 Difference]: Start difference. First operand 113 states and 161 transitions. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:55,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:55,196 INFO L93 Difference]: Finished difference Result 444 states and 636 transitions. [2022-11-03 02:49:55,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:49:55,197 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:49:55,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:55,198 INFO L225 Difference]: With dead ends: 444 [2022-11-03 02:49:55,199 INFO L226 Difference]: Without dead ends: 335 [2022-11-03 02:49:55,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:49:55,200 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 1184 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:55,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1184 Valid, 914 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:49:55,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-11-03 02:49:55,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 117. [2022-11-03 02:49:55,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.4310344827586208) internal successors, (166), 116 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:55,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 166 transitions. [2022-11-03 02:49:55,207 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 166 transitions. Word has length 100 [2022-11-03 02:49:55,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:55,208 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 166 transitions. [2022-11-03 02:49:55,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:55,208 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 166 transitions. [2022-11-03 02:49:55,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:49:55,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:55,209 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:55,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-03 02:49:55,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:55,425 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:55,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:55,426 INFO L85 PathProgramCache]: Analyzing trace with hash 317573985, now seen corresponding path program 1 times [2022-11-03 02:49:55,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:55,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552527762] [2022-11-03 02:49:55,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:55,427 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:55,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:55,428 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:55,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:49:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:55,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:49:55,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:56,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:56,032 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:56,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552527762] [2022-11-03 02:49:56,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552527762] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:56,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:49:56,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:49:56,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415188877] [2022-11-03 02:49:56,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:56,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:49:56,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:56,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:49:56,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:49:56,035 INFO L87 Difference]: Start difference. First operand 117 states and 166 transitions. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:56,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:56,571 INFO L93 Difference]: Finished difference Result 460 states and 656 transitions. [2022-11-03 02:49:56,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:49:56,571 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:49:56,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:56,573 INFO L225 Difference]: With dead ends: 460 [2022-11-03 02:49:56,573 INFO L226 Difference]: Without dead ends: 347 [2022-11-03 02:49:56,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:49:56,574 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 1191 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:56,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1191 Valid, 919 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:49:56,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-11-03 02:49:56,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 121. [2022-11-03 02:49:56,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.425) internal successors, (171), 120 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:56,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 171 transitions. [2022-11-03 02:49:56,581 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 171 transitions. Word has length 100 [2022-11-03 02:49:56,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:56,581 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 171 transitions. [2022-11-03 02:49:56,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:56,582 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 171 transitions. [2022-11-03 02:49:56,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:49:56,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:56,583 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:56,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:56,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:56,799 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:56,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:56,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1368605853, now seen corresponding path program 1 times [2022-11-03 02:49:56,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:56,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052455378] [2022-11-03 02:49:56,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:56,801 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:56,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:56,802 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:56,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:49:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:57,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:49:57,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:57,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:57,370 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:57,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052455378] [2022-11-03 02:49:57,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052455378] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:57,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:49:57,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:49:57,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737457537] [2022-11-03 02:49:57,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:57,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:49:57,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:57,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:49:57,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:49:57,373 INFO L87 Difference]: Start difference. First operand 121 states and 171 transitions. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:57,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:57,947 INFO L93 Difference]: Finished difference Result 458 states and 651 transitions. [2022-11-03 02:49:57,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:49:57,948 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:49:57,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:57,949 INFO L225 Difference]: With dead ends: 458 [2022-11-03 02:49:57,950 INFO L226 Difference]: Without dead ends: 341 [2022-11-03 02:49:57,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:49:57,951 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 1166 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1166 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:57,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1166 Valid, 922 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:49:57,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-11-03 02:49:57,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 123. [2022-11-03 02:49:57,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.4180327868852458) internal successors, (173), 122 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:57,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 173 transitions. [2022-11-03 02:49:57,957 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 173 transitions. Word has length 100 [2022-11-03 02:49:57,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:57,957 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 173 transitions. [2022-11-03 02:49:57,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:57,957 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 173 transitions. [2022-11-03 02:49:57,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:49:57,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:57,961 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:57,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-11-03 02:49:58,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:58,177 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:58,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:58,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1786002459, now seen corresponding path program 1 times [2022-11-03 02:49:58,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:58,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1745062537] [2022-11-03 02:49:58,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:58,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:58,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:58,179 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:58,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:49:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:58,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:49:58,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:59,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:59,037 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:59,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1745062537] [2022-11-03 02:49:59,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1745062537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:59,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:49:59,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:49:59,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936125025] [2022-11-03 02:49:59,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:59,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:49:59,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:59,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:49:59,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:49:59,039 INFO L87 Difference]: Start difference. First operand 123 states and 173 transitions. Second operand has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:59,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:59,093 INFO L93 Difference]: Finished difference Result 288 states and 404 transitions. [2022-11-03 02:49:59,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:49:59,094 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:49:59,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:59,095 INFO L225 Difference]: With dead ends: 288 [2022-11-03 02:49:59,095 INFO L226 Difference]: Without dead ends: 169 [2022-11-03 02:49:59,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:49:59,096 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 14 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:59,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1048 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 46 Unchecked, 0.0s Time] [2022-11-03 02:49:59,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-03 02:49:59,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-11-03 02:49:59,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.3928571428571428) internal successors, (234), 168 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:59,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 234 transitions. [2022-11-03 02:49:59,102 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 234 transitions. Word has length 100 [2022-11-03 02:49:59,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:59,103 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 234 transitions. [2022-11-03 02:49:59,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:59,103 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 234 transitions. [2022-11-03 02:49:59,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:49:59,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:59,105 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:59,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:59,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:59,318 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:59,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:59,319 INFO L85 PathProgramCache]: Analyzing trace with hash 547390179, now seen corresponding path program 1 times [2022-11-03 02:49:59,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:59,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885648166] [2022-11-03 02:49:59,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:59,320 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:59,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:59,324 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:59,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:49:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:59,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:49:59,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:59,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:59,986 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:59,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885648166] [2022-11-03 02:49:59,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885648166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:59,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:49:59,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:49:59,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775910545] [2022-11-03 02:49:59,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:59,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:49:59,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:59,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:49:59,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:49:59,989 INFO L87 Difference]: Start difference. First operand 169 states and 234 transitions. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:00,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:00,373 INFO L93 Difference]: Finished difference Result 469 states and 663 transitions. [2022-11-03 02:50:00,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:50:00,374 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:50:00,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:00,375 INFO L225 Difference]: With dead ends: 469 [2022-11-03 02:50:00,376 INFO L226 Difference]: Without dead ends: 350 [2022-11-03 02:50:00,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:50:00,377 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 972 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:00,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [972 Valid, 677 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:50:00,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-11-03 02:50:00,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 173. [2022-11-03 02:50:00,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.3895348837209303) internal successors, (239), 172 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 239 transitions. [2022-11-03 02:50:00,384 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 239 transitions. Word has length 100 [2022-11-03 02:50:00,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:00,384 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 239 transitions. [2022-11-03 02:50:00,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:00,385 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 239 transitions. [2022-11-03 02:50:00,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:50:00,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:00,386 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:00,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:00,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:50:00,602 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:00,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:00,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1108089957, now seen corresponding path program 1 times [2022-11-03 02:50:00,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:00,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915614981] [2022-11-03 02:50:00,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:00,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:00,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:00,604 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:00,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:50:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:00,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:50:00,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:01,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:01,237 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:01,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915614981] [2022-11-03 02:50:01,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915614981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:01,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:01,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:50:01,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291712528] [2022-11-03 02:50:01,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:01,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:50:01,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:01,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:50:01,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:50:01,240 INFO L87 Difference]: Start difference. First operand 173 states and 239 transitions. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:01,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:01,630 INFO L93 Difference]: Finished difference Result 475 states and 669 transitions. [2022-11-03 02:50:01,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:50:01,630 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:50:01,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:01,632 INFO L225 Difference]: With dead ends: 475 [2022-11-03 02:50:01,632 INFO L226 Difference]: Without dead ends: 352 [2022-11-03 02:50:01,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:50:01,633 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 965 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:01,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [965 Valid, 679 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:50:01,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-11-03 02:50:01,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 175. [2022-11-03 02:50:01,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.3850574712643677) internal successors, (241), 174 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:01,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 241 transitions. [2022-11-03 02:50:01,641 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 241 transitions. Word has length 100 [2022-11-03 02:50:01,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:01,641 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 241 transitions. [2022-11-03 02:50:01,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:01,642 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 241 transitions. [2022-11-03 02:50:01,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:50:01,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:01,643 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:01,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:01,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:50:01,859 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:01,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:01,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1925960089, now seen corresponding path program 1 times [2022-11-03 02:50:01,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:01,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013060803] [2022-11-03 02:50:01,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:01,860 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:01,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:01,861 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:01,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:50:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:02,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:50:02,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:02,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:02,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:02,979 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:02,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013060803] [2022-11-03 02:50:02,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013060803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:02,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:02,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-11-03 02:50:02,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052131313] [2022-11-03 02:50:02,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:02,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 02:50:02,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:02,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 02:50:02,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:50:02,981 INFO L87 Difference]: Start difference. First operand 175 states and 241 transitions. Second operand has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:12,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:12,558 INFO L93 Difference]: Finished difference Result 2178 states and 2994 transitions. [2022-11-03 02:50:12,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-11-03 02:50:12,558 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:50:12,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:12,566 INFO L225 Difference]: With dead ends: 2178 [2022-11-03 02:50:12,566 INFO L226 Difference]: Without dead ends: 2053 [2022-11-03 02:50:12,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10914 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=6152, Invalid=23260, Unknown=0, NotChecked=0, Total=29412 [2022-11-03 02:50:12,576 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 7321 mSDsluCounter, 4347 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7321 SdHoareTripleChecker+Valid, 4506 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:12,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7321 Valid, 4506 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:50:12,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2022-11-03 02:50:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 243. [2022-11-03 02:50:12,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.3429752066115703) internal successors, (325), 242 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:12,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 325 transitions. [2022-11-03 02:50:12,598 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 325 transitions. Word has length 100 [2022-11-03 02:50:12,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:12,598 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 325 transitions. [2022-11-03 02:50:12,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:12,599 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 325 transitions. [2022-11-03 02:50:12,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:50:12,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:12,600 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:12,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-03 02:50:12,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:50:12,817 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:12,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:12,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1482059415, now seen corresponding path program 1 times [2022-11-03 02:50:12,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:12,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039296603] [2022-11-03 02:50:12,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:12,819 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:12,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:12,820 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:12,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:50:13,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:13,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:50:13,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:13,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:13,466 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:13,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039296603] [2022-11-03 02:50:13,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2039296603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:13,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:13,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:50:13,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407028509] [2022-11-03 02:50:13,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:13,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:50:13,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:13,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:50:13,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:50:13,468 INFO L87 Difference]: Start difference. First operand 243 states and 325 transitions. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:14,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:14,051 INFO L93 Difference]: Finished difference Result 748 states and 1016 transitions. [2022-11-03 02:50:14,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:50:14,052 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:50:14,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:14,055 INFO L225 Difference]: With dead ends: 748 [2022-11-03 02:50:14,055 INFO L226 Difference]: Without dead ends: 585 [2022-11-03 02:50:14,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:50:14,058 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 1214 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1214 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:14,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1214 Valid, 945 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:50:14,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-11-03 02:50:14,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 251. [2022-11-03 02:50:14,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.344) internal successors, (336), 250 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:14,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 336 transitions. [2022-11-03 02:50:14,078 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 336 transitions. Word has length 100 [2022-11-03 02:50:14,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:14,079 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 336 transitions. [2022-11-03 02:50:14,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:14,079 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 336 transitions. [2022-11-03 02:50:14,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:50:14,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:14,080 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:14,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:14,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:50:14,281 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:14,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:14,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1497578133, now seen corresponding path program 1 times [2022-11-03 02:50:14,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:14,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326770902] [2022-11-03 02:50:14,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:14,282 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:14,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:14,283 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:14,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:50:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:14,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:50:14,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:15,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:15,418 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:15,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326770902] [2022-11-03 02:50:15,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326770902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:15,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:15,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-11-03 02:50:15,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410443102] [2022-11-03 02:50:15,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:15,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 02:50:15,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:15,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 02:50:15,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:50:15,420 INFO L87 Difference]: Start difference. First operand 251 states and 336 transitions. Second operand has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:24,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:24,666 INFO L93 Difference]: Finished difference Result 2300 states and 3152 transitions. [2022-11-03 02:50:24,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-11-03 02:50:24,666 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:50:24,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:24,672 INFO L225 Difference]: With dead ends: 2300 [2022-11-03 02:50:24,673 INFO L226 Difference]: Without dead ends: 2129 [2022-11-03 02:50:24,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10914 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=6152, Invalid=23260, Unknown=0, NotChecked=0, Total=29412 [2022-11-03 02:50:24,682 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 7330 mSDsluCounter, 4498 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7330 SdHoareTripleChecker+Valid, 4685 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:24,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7330 Valid, 4685 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1313 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:50:24,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-11-03 02:50:24,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 263. [2022-11-03 02:50:24,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.3435114503816794) internal successors, (352), 262 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:24,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 352 transitions. [2022-11-03 02:50:24,732 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 352 transitions. Word has length 100 [2022-11-03 02:50:24,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:24,732 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 352 transitions. [2022-11-03 02:50:24,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:24,733 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 352 transitions. [2022-11-03 02:50:24,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:50:24,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:24,734 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:24,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:24,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:50:24,942 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:24,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:24,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1073931411, now seen corresponding path program 1 times [2022-11-03 02:50:24,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:24,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729954079] [2022-11-03 02:50:24,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:24,943 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:24,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:24,944 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:24,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:50:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:25,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:50:25,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:25,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:25,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:25,537 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:25,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729954079] [2022-11-03 02:50:25,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729954079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:25,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:25,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:50:25,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007764696] [2022-11-03 02:50:25,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:25,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:50:25,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:25,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:50:25,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:50:25,540 INFO L87 Difference]: Start difference. First operand 263 states and 352 transitions. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:26,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:26,143 INFO L93 Difference]: Finished difference Result 803 states and 1089 transitions. [2022-11-03 02:50:26,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:50:26,144 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:50:26,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:26,146 INFO L225 Difference]: With dead ends: 803 [2022-11-03 02:50:26,146 INFO L226 Difference]: Without dead ends: 620 [2022-11-03 02:50:26,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:50:26,147 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 1195 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1195 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:26,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1195 Valid, 961 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:50:26,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-11-03 02:50:26,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 273. [2022-11-03 02:50:26,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.3455882352941178) internal successors, (366), 272 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:26,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 366 transitions. [2022-11-03 02:50:26,160 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 366 transitions. Word has length 100 [2022-11-03 02:50:26,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:26,160 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 366 transitions. [2022-11-03 02:50:26,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:26,160 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 366 transitions. [2022-11-03 02:50:26,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:50:26,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:26,162 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:26,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:26,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:50:26,379 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:26,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:26,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1375668719, now seen corresponding path program 1 times [2022-11-03 02:50:26,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:26,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789324394] [2022-11-03 02:50:26,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:26,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:26,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:26,382 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:26,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:50:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:26,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:50:26,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:27,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:27,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:27,003 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:27,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789324394] [2022-11-03 02:50:27,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789324394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:27,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:27,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:50:27,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742929803] [2022-11-03 02:50:27,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:27,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:50:27,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:27,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:50:27,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:50:27,006 INFO L87 Difference]: Start difference. First operand 273 states and 366 transitions. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:27,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:27,564 INFO L93 Difference]: Finished difference Result 856 states and 1162 transitions. [2022-11-03 02:50:27,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:50:27,565 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:50:27,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:27,568 INFO L225 Difference]: With dead ends: 856 [2022-11-03 02:50:27,568 INFO L226 Difference]: Without dead ends: 663 [2022-11-03 02:50:27,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:50:27,570 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 1246 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:27,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1246 Valid, 967 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:50:27,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-11-03 02:50:27,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 277. [2022-11-03 02:50:27,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.3442028985507246) internal successors, (371), 276 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:27,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 371 transitions. [2022-11-03 02:50:27,583 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 371 transitions. Word has length 100 [2022-11-03 02:50:27,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:27,584 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 371 transitions. [2022-11-03 02:50:27,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:27,584 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 371 transitions. [2022-11-03 02:50:27,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:50:27,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:27,585 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:27,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-11-03 02:50:27,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:50:27,802 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:27,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:27,802 INFO L85 PathProgramCache]: Analyzing trace with hash 531663217, now seen corresponding path program 1 times [2022-11-03 02:50:27,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:27,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [177190705] [2022-11-03 02:50:27,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:27,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:27,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:27,804 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:27,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:50:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:28,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:50:28,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:28,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:28,835 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:28,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [177190705] [2022-11-03 02:50:28,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [177190705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:28,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:28,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-11-03 02:50:28,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917591975] [2022-11-03 02:50:28,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:28,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 02:50:28,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:28,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 02:50:28,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:50:28,838 INFO L87 Difference]: Start difference. First operand 277 states and 371 transitions. Second operand has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:37,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:37,850 INFO L93 Difference]: Finished difference Result 2446 states and 3341 transitions. [2022-11-03 02:50:37,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-11-03 02:50:37,850 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:50:37,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:37,857 INFO L225 Difference]: With dead ends: 2446 [2022-11-03 02:50:37,857 INFO L226 Difference]: Without dead ends: 2249 [2022-11-03 02:50:37,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10914 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=6152, Invalid=23260, Unknown=0, NotChecked=0, Total=29412 [2022-11-03 02:50:37,862 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 7305 mSDsluCounter, 4593 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7305 SdHoareTripleChecker+Valid, 4798 SdHoareTripleChecker+Invalid, 1612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:37,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7305 Valid, 4798 Invalid, 1612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:50:37,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2022-11-03 02:50:37,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 285. [2022-11-03 02:50:37,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.3380281690140845) internal successors, (380), 284 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:37,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 380 transitions. [2022-11-03 02:50:37,884 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 380 transitions. Word has length 100 [2022-11-03 02:50:37,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:37,885 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 380 transitions. [2022-11-03 02:50:37,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:37,885 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 380 transitions. [2022-11-03 02:50:37,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:50:37,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:37,887 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:37,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:38,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:50:38,103 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:38,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:38,104 INFO L85 PathProgramCache]: Analyzing trace with hash 459276659, now seen corresponding path program 1 times [2022-11-03 02:50:38,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:38,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516865729] [2022-11-03 02:50:38,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:38,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:38,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:38,105 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:38,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:50:38,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:38,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:50:38,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:39,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:39,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:39,156 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:39,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516865729] [2022-11-03 02:50:39,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516865729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:39,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:39,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-11-03 02:50:39,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331527021] [2022-11-03 02:50:39,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:39,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 02:50:39,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:39,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 02:50:39,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:50:39,159 INFO L87 Difference]: Start difference. First operand 285 states and 380 transitions. Second operand has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:48,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:48,346 INFO L93 Difference]: Finished difference Result 2460 states and 3357 transitions. [2022-11-03 02:50:48,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-11-03 02:50:48,347 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:50:48,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:48,352 INFO L225 Difference]: With dead ends: 2460 [2022-11-03 02:50:48,352 INFO L226 Difference]: Without dead ends: 2255 [2022-11-03 02:50:48,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10914 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=6152, Invalid=23260, Unknown=0, NotChecked=0, Total=29412 [2022-11-03 02:50:48,356 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 7313 mSDsluCounter, 4669 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7313 SdHoareTripleChecker+Valid, 4888 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:48,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7313 Valid, 4888 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:50:48,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2022-11-03 02:50:48,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 291. [2022-11-03 02:50:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.3379310344827586) internal successors, (388), 290 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:48,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 388 transitions. [2022-11-03 02:50:48,377 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 388 transitions. Word has length 100 [2022-11-03 02:50:48,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:48,378 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 388 transitions. [2022-11-03 02:50:48,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:48,378 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 388 transitions. [2022-11-03 02:50:48,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:50:48,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:48,380 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:48,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-11-03 02:50:48,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:50:48,595 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:48,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:48,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1912462603, now seen corresponding path program 1 times [2022-11-03 02:50:48,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:48,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51609194] [2022-11-03 02:50:48,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:48,597 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:48,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:48,598 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:48,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:50:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:48,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:50:48,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:49,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:49,269 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:49,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51609194] [2022-11-03 02:50:49,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51609194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:49,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:49,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:50:49,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559932740] [2022-11-03 02:50:49,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:49,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:50:49,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:49,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:50:49,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:50:49,271 INFO L87 Difference]: Start difference. First operand 291 states and 388 transitions. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:49,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:49,810 INFO L93 Difference]: Finished difference Result 915 states and 1234 transitions. [2022-11-03 02:50:49,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:50:49,810 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:50:49,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:49,812 INFO L225 Difference]: With dead ends: 915 [2022-11-03 02:50:49,812 INFO L226 Difference]: Without dead ends: 704 [2022-11-03 02:50:49,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:50:49,813 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 1224 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1224 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:49,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1224 Valid, 985 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:50:49,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-11-03 02:50:49,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 301. [2022-11-03 02:50:49,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.34) internal successors, (402), 300 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:49,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 402 transitions. [2022-11-03 02:50:49,825 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 402 transitions. Word has length 100 [2022-11-03 02:50:49,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:49,826 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 402 transitions. [2022-11-03 02:50:49,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:49,826 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 402 transitions. [2022-11-03 02:50:49,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:50:49,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:49,827 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:49,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:50,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:50:50,041 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:50,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:50,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1771913993, now seen corresponding path program 1 times [2022-11-03 02:50:50,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:50,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [634597665] [2022-11-03 02:50:50,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:50,042 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:50,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:50,043 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:50,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:50:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:50,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:50:50,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:51,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:51,103 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:51,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [634597665] [2022-11-03 02:50:51,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [634597665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:51,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:51,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-11-03 02:50:51,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279342915] [2022-11-03 02:50:51,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:51,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 02:50:51,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:51,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 02:50:51,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:50:51,105 INFO L87 Difference]: Start difference. First operand 301 states and 402 transitions. Second operand has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:00,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:00,042 INFO L93 Difference]: Finished difference Result 2562 states and 3494 transitions. [2022-11-03 02:51:00,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-11-03 02:51:00,043 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:51:00,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:00,048 INFO L225 Difference]: With dead ends: 2562 [2022-11-03 02:51:00,048 INFO L226 Difference]: Without dead ends: 2341 [2022-11-03 02:51:00,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10914 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=6152, Invalid=23260, Unknown=0, NotChecked=0, Total=29412 [2022-11-03 02:51:00,052 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 7301 mSDsluCounter, 4749 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7301 SdHoareTripleChecker+Valid, 4983 SdHoareTripleChecker+Invalid, 1639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:00,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7301 Valid, 4983 Invalid, 1639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1360 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:51:00,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2022-11-03 02:51:00,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 307. [2022-11-03 02:51:00,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.3366013071895424) internal successors, (409), 306 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 409 transitions. [2022-11-03 02:51:00,072 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 409 transitions. Word has length 100 [2022-11-03 02:51:00,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:00,073 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 409 transitions. [2022-11-03 02:51:00,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:00,073 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 409 transitions. [2022-11-03 02:51:00,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:51:00,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:00,075 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:00,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:00,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:00,295 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:00,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:00,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1349212167, now seen corresponding path program 1 times [2022-11-03 02:51:00,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:00,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [112715195] [2022-11-03 02:51:00,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:00,296 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:00,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:00,297 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:00,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:51:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:00,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:51:00,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:00,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:00,937 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:00,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [112715195] [2022-11-03 02:51:00,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [112715195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:00,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:00,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:51:00,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618704920] [2022-11-03 02:51:00,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:00,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:51:00,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:00,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:51:00,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:51:00,939 INFO L87 Difference]: Start difference. First operand 307 states and 409 transitions. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:01,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:01,302 INFO L93 Difference]: Finished difference Result 787 states and 1060 transitions. [2022-11-03 02:51:01,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:51:01,303 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:51:01,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:01,306 INFO L225 Difference]: With dead ends: 787 [2022-11-03 02:51:01,306 INFO L226 Difference]: Without dead ends: 560 [2022-11-03 02:51:01,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:51:01,307 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 887 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:01,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [887 Valid, 741 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:51:01,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-11-03 02:51:01,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 313. [2022-11-03 02:51:01,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.3365384615384615) internal successors, (417), 312 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:01,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 417 transitions. [2022-11-03 02:51:01,326 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 417 transitions. Word has length 100 [2022-11-03 02:51:01,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:01,327 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 417 transitions. [2022-11-03 02:51:01,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:01,327 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 417 transitions. [2022-11-03 02:51:01,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:51:01,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:01,328 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:01,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:01,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:01,542 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:01,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:01,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1256811387, now seen corresponding path program 1 times [2022-11-03 02:51:01,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:01,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706296437] [2022-11-03 02:51:01,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:01,543 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:01,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:01,544 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:01,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:51:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:01,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:51:01,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:02,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:02,198 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:02,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706296437] [2022-11-03 02:51:02,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706296437] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:02,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:02,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:51:02,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722328274] [2022-11-03 02:51:02,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:02,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:51:02,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:02,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:51:02,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:51:02,200 INFO L87 Difference]: Start difference. First operand 313 states and 417 transitions. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:02,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:02,576 INFO L93 Difference]: Finished difference Result 795 states and 1069 transitions. [2022-11-03 02:51:02,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:51:02,577 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:51:02,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:02,578 INFO L225 Difference]: With dead ends: 795 [2022-11-03 02:51:02,578 INFO L226 Difference]: Without dead ends: 562 [2022-11-03 02:51:02,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:51:02,579 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 880 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:02,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [880 Valid, 743 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:51:02,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-11-03 02:51:02,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 315. [2022-11-03 02:51:02,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.3343949044585988) internal successors, (419), 314 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:02,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 419 transitions. [2022-11-03 02:51:02,592 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 419 transitions. Word has length 100 [2022-11-03 02:51:02,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:02,592 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 419 transitions. [2022-11-03 02:51:02,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:02,593 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 419 transitions. [2022-11-03 02:51:02,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:51:02,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:02,594 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:02,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:02,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:02,811 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:02,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:02,811 INFO L85 PathProgramCache]: Analyzing trace with hash -331536515, now seen corresponding path program 1 times [2022-11-03 02:51:02,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:02,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273910952] [2022-11-03 02:51:02,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:02,812 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:02,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:02,815 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:02,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:51:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:03,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:51:03,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:03,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:03,790 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:03,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273910952] [2022-11-03 02:51:03,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273910952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:03,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:03,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:51:03,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956225174] [2022-11-03 02:51:03,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:03,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:51:03,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:03,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:51:03,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:51:03,793 INFO L87 Difference]: Start difference. First operand 315 states and 419 transitions. Second operand has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:03,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:03,904 INFO L93 Difference]: Finished difference Result 636 states and 846 transitions. [2022-11-03 02:51:03,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:51:03,905 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:51:03,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:03,906 INFO L225 Difference]: With dead ends: 636 [2022-11-03 02:51:03,906 INFO L226 Difference]: Without dead ends: 401 [2022-11-03 02:51:03,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:51:03,908 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 77 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:03,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 1022 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2022-11-03 02:51:03,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-11-03 02:51:03,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2022-11-03 02:51:03,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.32) internal successors, (528), 400 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:03,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 528 transitions. [2022-11-03 02:51:03,920 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 528 transitions. Word has length 100 [2022-11-03 02:51:03,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:03,920 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 528 transitions. [2022-11-03 02:51:03,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:03,920 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 528 transitions. [2022-11-03 02:51:03,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:51:03,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:03,922 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:03,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:04,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:04,130 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:04,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:04,131 INFO L85 PathProgramCache]: Analyzing trace with hash 948327163, now seen corresponding path program 1 times [2022-11-03 02:51:04,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:04,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432019990] [2022-11-03 02:51:04,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:04,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:04,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:04,133 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:04,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 02:51:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:04,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:51:04,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:05,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:05,230 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:05,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432019990] [2022-11-03 02:51:05,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432019990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:05,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:05,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-03 02:51:05,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400796690] [2022-11-03 02:51:05,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:05,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 02:51:05,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:05,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 02:51:05,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:51:05,233 INFO L87 Difference]: Start difference. First operand 401 states and 528 transitions. Second operand has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:06,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:06,591 INFO L93 Difference]: Finished difference Result 1545 states and 2093 transitions. [2022-11-03 02:51:06,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 02:51:06,592 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:51:06,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:06,598 INFO L225 Difference]: With dead ends: 1545 [2022-11-03 02:51:06,598 INFO L226 Difference]: Without dead ends: 1310 [2022-11-03 02:51:06,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=307, Invalid=1253, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:51:06,599 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 1385 mSDsluCounter, 4120 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1385 SdHoareTripleChecker+Valid, 4386 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:06,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1385 Valid, 4386 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:51:06,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2022-11-03 02:51:06,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 517. [2022-11-03 02:51:06,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.3333333333333333) internal successors, (688), 516 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:06,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 688 transitions. [2022-11-03 02:51:06,621 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 688 transitions. Word has length 100 [2022-11-03 02:51:06,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:06,622 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 688 transitions. [2022-11-03 02:51:06,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:06,622 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 688 transitions. [2022-11-03 02:51:06,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:51:06,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:06,624 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:06,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:06,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:06,846 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:06,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:06,847 INFO L85 PathProgramCache]: Analyzing trace with hash 361521149, now seen corresponding path program 1 times [2022-11-03 02:51:06,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:06,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222102618] [2022-11-03 02:51:06,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:06,848 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:06,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:06,850 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:06,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:51:07,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:07,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:51:07,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:07,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:07,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:07,891 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:07,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222102618] [2022-11-03 02:51:07,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222102618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:07,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:07,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-11-03 02:51:07,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636190812] [2022-11-03 02:51:07,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:07,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 02:51:07,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:07,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 02:51:07,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:51:07,893 INFO L87 Difference]: Start difference. First operand 517 states and 688 transitions. Second operand has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:16,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:16,751 INFO L93 Difference]: Finished difference Result 3342 states and 4544 transitions. [2022-11-03 02:51:16,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-11-03 02:51:16,752 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:51:16,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:16,771 INFO L225 Difference]: With dead ends: 3342 [2022-11-03 02:51:16,772 INFO L226 Difference]: Without dead ends: 3107 [2022-11-03 02:51:16,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10914 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=6152, Invalid=23260, Unknown=0, NotChecked=0, Total=29412 [2022-11-03 02:51:16,776 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 7272 mSDsluCounter, 4868 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7272 SdHoareTripleChecker+Valid, 5124 SdHoareTripleChecker+Invalid, 1672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:16,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7272 Valid, 5124 Invalid, 1672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1393 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:51:16,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2022-11-03 02:51:16,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 541. [2022-11-03 02:51:16,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 1.3222222222222222) internal successors, (714), 540 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:16,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 714 transitions. [2022-11-03 02:51:16,808 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 714 transitions. Word has length 100 [2022-11-03 02:51:16,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:16,809 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 714 transitions. [2022-11-03 02:51:16,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:16,810 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 714 transitions. [2022-11-03 02:51:16,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:51:16,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:16,811 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:16,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:17,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:17,026 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:17,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:17,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1062585727, now seen corresponding path program 1 times [2022-11-03 02:51:17,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:17,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542970838] [2022-11-03 02:51:17,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:17,028 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:17,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:17,029 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:17,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 02:51:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:17,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:51:17,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:18,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:18,017 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:18,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542970838] [2022-11-03 02:51:18,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542970838] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:18,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:18,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-03 02:51:18,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200432705] [2022-11-03 02:51:18,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:18,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 02:51:18,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:18,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 02:51:18,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:51:18,019 INFO L87 Difference]: Start difference. First operand 541 states and 714 transitions. Second operand has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:19,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:19,330 INFO L93 Difference]: Finished difference Result 1592 states and 2136 transitions. [2022-11-03 02:51:19,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 02:51:19,330 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:51:19,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:19,334 INFO L225 Difference]: With dead ends: 1592 [2022-11-03 02:51:19,335 INFO L226 Difference]: Without dead ends: 1347 [2022-11-03 02:51:19,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=307, Invalid=1253, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:51:19,335 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 1340 mSDsluCounter, 4130 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 4406 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:19,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1340 Valid, 4406 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:51:19,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2022-11-03 02:51:19,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 547. [2022-11-03 02:51:19,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.3205128205128205) internal successors, (721), 546 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 721 transitions. [2022-11-03 02:51:19,354 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 721 transitions. Word has length 100 [2022-11-03 02:51:19,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:19,354 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 721 transitions. [2022-11-03 02:51:19,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:19,354 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 721 transitions. [2022-11-03 02:51:19,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:51:19,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:19,356 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:19,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:19,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:19,571 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:19,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:19,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1742644097, now seen corresponding path program 1 times [2022-11-03 02:51:19,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:19,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2113464901] [2022-11-03 02:51:19,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:19,573 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:19,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:19,573 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:19,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 02:51:19,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:19,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:51:19,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:20,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:20,585 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:20,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2113464901] [2022-11-03 02:51:20,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2113464901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:20,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:20,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-11-03 02:51:20,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616688928] [2022-11-03 02:51:20,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:20,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 02:51:20,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:20,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 02:51:20,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:51:20,587 INFO L87 Difference]: Start difference. First operand 547 states and 721 transitions. Second operand has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:29,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:29,342 INFO L93 Difference]: Finished difference Result 3380 states and 4589 transitions. [2022-11-03 02:51:29,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-11-03 02:51:29,343 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:51:29,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:29,352 INFO L225 Difference]: With dead ends: 3380 [2022-11-03 02:51:29,353 INFO L226 Difference]: Without dead ends: 3135 [2022-11-03 02:51:29,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10914 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=6152, Invalid=23260, Unknown=0, NotChecked=0, Total=29412 [2022-11-03 02:51:29,369 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 7273 mSDsluCounter, 4922 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7273 SdHoareTripleChecker+Valid, 5188 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:29,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7273 Valid, 5188 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1400 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:51:29,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2022-11-03 02:51:29,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 553. [2022-11-03 02:51:29,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.318840579710145) internal successors, (728), 552 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:29,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 728 transitions. [2022-11-03 02:51:29,393 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 728 transitions. Word has length 100 [2022-11-03 02:51:29,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:29,393 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 728 transitions. [2022-11-03 02:51:29,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:29,394 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 728 transitions. [2022-11-03 02:51:29,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:51:29,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:29,395 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:29,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:29,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:29,608 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:29,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:29,609 INFO L85 PathProgramCache]: Analyzing trace with hash -777315837, now seen corresponding path program 1 times [2022-11-03 02:51:29,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:29,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127322480] [2022-11-03 02:51:29,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:29,610 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:29,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:29,611 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:29,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:51:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:29,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:51:29,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:30,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:30,723 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:30,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127322480] [2022-11-03 02:51:30,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127322480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:30,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:30,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-11-03 02:51:30,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947584932] [2022-11-03 02:51:30,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:30,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 02:51:30,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:30,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 02:51:30,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:51:30,725 INFO L87 Difference]: Start difference. First operand 553 states and 728 transitions. Second operand has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:39,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:39,638 INFO L93 Difference]: Finished difference Result 3386 states and 4595 transitions. [2022-11-03 02:51:39,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-11-03 02:51:39,639 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-03 02:51:39,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:39,647 INFO L225 Difference]: With dead ends: 3386 [2022-11-03 02:51:39,648 INFO L226 Difference]: Without dead ends: 3137 [2022-11-03 02:51:39,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10914 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=6152, Invalid=23260, Unknown=0, NotChecked=0, Total=29412 [2022-11-03 02:51:39,650 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 7267 mSDsluCounter, 4943 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7267 SdHoareTripleChecker+Valid, 5213 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:39,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7267 Valid, 5213 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1407 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:51:39,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3137 states. [2022-11-03 02:51:39,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3137 to 555. [2022-11-03 02:51:39,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.3176895306859207) internal successors, (730), 554 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:39,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 730 transitions. [2022-11-03 02:51:39,674 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 730 transitions. Word has length 100 [2022-11-03 02:51:39,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:39,674 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 730 transitions. [2022-11-03 02:51:39,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:39,675 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 730 transitions. [2022-11-03 02:51:39,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:51:39,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:39,676 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:39,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:39,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:39,886 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:39,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:39,886 INFO L85 PathProgramCache]: Analyzing trace with hash -775468795, now seen corresponding path program 1 times [2022-11-03 02:51:39,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:39,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738050347] [2022-11-03 02:51:39,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:39,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:39,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:39,888 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:39,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 02:51:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:40,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:51:40,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:40,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:42,067 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:42,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738050347] [2022-11-03 02:51:42,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738050347] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:42,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1659655475] [2022-11-03 02:51:42,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:42,068 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:42,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:51:42,072 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:51:42,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-03 02:51:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:42,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:51:42,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:43,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:44,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1659655475] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:44,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699782904] [2022-11-03 02:51:44,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:44,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:44,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:44,251 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:44,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-03 02:51:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:44,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:51:44,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:45,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:46,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699782904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:46,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:51:46,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 8] total 14 [2022-11-03 02:51:46,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472480874] [2022-11-03 02:51:46,171 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:51:46,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:51:46,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:46,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:51:46,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:51:46,173 INFO L87 Difference]: Start difference. First operand 555 states and 730 transitions. Second operand has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 14 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:46,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:46,327 INFO L93 Difference]: Finished difference Result 652 states and 863 transitions. [2022-11-03 02:51:46,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:51:46,328 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 14 states have internal predecessors, (202), 0 states have call successors, (0), 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 100 [2022-11-03 02:51:46,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:46,330 INFO L225 Difference]: With dead ends: 652 [2022-11-03 02:51:46,330 INFO L226 Difference]: Without dead ends: 650 [2022-11-03 02:51:46,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 578 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:51:46,331 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 283 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:46,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 1169 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 56 Unchecked, 0.0s Time] [2022-11-03 02:51:46,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-11-03 02:51:46,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 608. [2022-11-03 02:51:46,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 1.3261943986820428) internal successors, (805), 607 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:46,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 805 transitions. [2022-11-03 02:51:46,353 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 805 transitions. Word has length 100 [2022-11-03 02:51:46,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:46,353 INFO L495 AbstractCegarLoop]: Abstraction has 608 states and 805 transitions. [2022-11-03 02:51:46,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 14 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:46,354 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 805 transitions. [2022-11-03 02:51:46,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-03 02:51:46,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:46,356 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:46,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-11-03 02:51:46,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:46,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:46,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:46,961 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:46,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:46,962 INFO L85 PathProgramCache]: Analyzing trace with hash -2054251783, now seen corresponding path program 1 times [2022-11-03 02:51:46,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:46,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621616483] [2022-11-03 02:51:46,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:46,963 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:46,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:46,964 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:46,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 02:51:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:47,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:51:47,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:48,361 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:51:48,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:49,186 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:51:49,186 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:49,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621616483] [2022-11-03 02:51:49,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621616483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:49,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1553077715] [2022-11-03 02:51:49,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:49,187 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:49,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:51:49,190 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:51:49,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-03 02:51:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:49,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:51:49,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:50,002 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 02:51:50,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:50,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1553077715] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:50,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:51:50,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 19 [2022-11-03 02:51:50,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647134677] [2022-11-03 02:51:50,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:50,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:51:50,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:50,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:51:50,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:51:50,005 INFO L87 Difference]: Start difference. First operand 608 states and 805 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:50,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:50,180 INFO L93 Difference]: Finished difference Result 1818 states and 2438 transitions. [2022-11-03 02:51:50,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:51:50,180 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 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 195 [2022-11-03 02:51:50,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:50,183 INFO L225 Difference]: With dead ends: 1818 [2022-11-03 02:51:50,183 INFO L226 Difference]: Without dead ends: 1424 [2022-11-03 02:51:50,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 568 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:51:50,184 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 436 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:50,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 998 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:50,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2022-11-03 02:51:50,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 632. [2022-11-03 02:51:50,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 1.323296354992076) internal successors, (835), 631 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:50,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 835 transitions. [2022-11-03 02:51:50,217 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 835 transitions. Word has length 195 [2022-11-03 02:51:50,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:50,218 INFO L495 AbstractCegarLoop]: Abstraction has 632 states and 835 transitions. [2022-11-03 02:51:50,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:50,218 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 835 transitions. [2022-11-03 02:51:50,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-03 02:51:50,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:50,221 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:50,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:50,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:50,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:50,626 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:50,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:50,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1701163401, now seen corresponding path program 1 times [2022-11-03 02:51:50,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:50,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438373519] [2022-11-03 02:51:50,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:50,628 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:50,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:50,629 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:50,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 02:51:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:51,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:51:51,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:51:51,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:51:52,769 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:52,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438373519] [2022-11-03 02:51:52,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438373519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:52,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1459145634] [2022-11-03 02:51:52,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:52,770 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:52,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:51:52,771 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:51:52,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-03 02:51:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:53,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 02:51:53,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 68 proven. 23 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:51:54,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:51:55,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1459145634] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:51:55,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:51:55,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 9, 14] total 32 [2022-11-03 02:51:55,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178952223] [2022-11-03 02:51:55,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:55,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:51:55,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:55,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:51:55,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:51:55,288 INFO L87 Difference]: Start difference. First operand 632 states and 835 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 8 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:56,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:56,481 INFO L93 Difference]: Finished difference Result 2658 states and 3634 transitions. [2022-11-03 02:51:56,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:51:56,482 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 8 states have internal predecessors, (179), 0 states have call successors, (0), 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 195 [2022-11-03 02:51:56,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:56,485 INFO L225 Difference]: With dead ends: 2658 [2022-11-03 02:51:56,486 INFO L226 Difference]: Without dead ends: 2300 [2022-11-03 02:51:56,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 760 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=281, Invalid=1975, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 02:51:56,487 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 856 mSDsluCounter, 1685 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 2269 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:56,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 2269 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:51:56,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2022-11-03 02:51:56,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 650. [2022-11-03 02:51:56,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 1.3204930662557781) internal successors, (857), 649 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:56,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 857 transitions. [2022-11-03 02:51:56,517 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 857 transitions. Word has length 195 [2022-11-03 02:51:56,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:56,518 INFO L495 AbstractCegarLoop]: Abstraction has 650 states and 857 transitions. [2022-11-03 02:51:56,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 8 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:56,518 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 857 transitions. [2022-11-03 02:51:56,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-03 02:51:56,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:56,520 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:56,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:56,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:56,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:56,934 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:56,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:56,935 INFO L85 PathProgramCache]: Analyzing trace with hash -314377991, now seen corresponding path program 1 times [2022-11-03 02:51:56,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:56,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275557587] [2022-11-03 02:51:56,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:56,936 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:56,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:56,937 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:56,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 02:51:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:57,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:51:57,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:51:58,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:59,016 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:51:59,016 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:59,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275557587] [2022-11-03 02:51:59,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275557587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:59,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [19396432] [2022-11-03 02:51:59,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:59,017 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:59,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:51:59,021 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:51:59,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-03 02:51:59,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:59,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 02:51:59,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 44 proven. 47 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:52:01,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:52:01,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [19396432] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:52:01,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:52:01,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9, 15] total 34 [2022-11-03 02:52:01,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887870986] [2022-11-03 02:52:01,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:01,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:52:01,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:52:01,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:52:01,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 02:52:01,715 INFO L87 Difference]: Start difference. First operand 650 states and 857 transitions. Second operand has 9 states, 9 states have (on average 19.88888888888889) internal successors, (179), 9 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:03,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:03,403 INFO L93 Difference]: Finished difference Result 2536 states and 3398 transitions. [2022-11-03 02:52:03,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-03 02:52:03,404 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.88888888888889) internal successors, (179), 9 states have internal predecessors, (179), 0 states have call successors, (0), 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 195 [2022-11-03 02:52:03,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:03,409 INFO L225 Difference]: With dead ends: 2536 [2022-11-03 02:52:03,409 INFO L226 Difference]: Without dead ends: 2226 [2022-11-03 02:52:03,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 828 GetRequests, 770 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=444, Invalid=3096, Unknown=0, NotChecked=0, Total=3540 [2022-11-03 02:52:03,415 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 1032 mSDsluCounter, 2017 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 2569 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:03,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1032 Valid, 2569 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:52:03,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2022-11-03 02:52:03,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 772. [2022-11-03 02:52:03,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 1.3346303501945525) internal successors, (1029), 771 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:03,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1029 transitions. [2022-11-03 02:52:03,449 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1029 transitions. Word has length 195 [2022-11-03 02:52:03,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:03,450 INFO L495 AbstractCegarLoop]: Abstraction has 772 states and 1029 transitions. [2022-11-03 02:52:03,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.88888888888889) internal successors, (179), 9 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:03,450 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1029 transitions. [2022-11-03 02:52:03,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-03 02:52:03,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:03,452 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:03,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:03,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:03,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:52:03,875 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:03,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:03,875 INFO L85 PathProgramCache]: Analyzing trace with hash -2119816325, now seen corresponding path program 1 times [2022-11-03 02:52:03,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:52:03,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349247244] [2022-11-03 02:52:03,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:03,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:52:03,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:52:03,877 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:52:03,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 02:52:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:04,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:52:04,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:52:05,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:52:05,956 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:52:05,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349247244] [2022-11-03 02:52:05,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349247244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:05,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1802781810] [2022-11-03 02:52:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:05,969 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:52:05,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:52:05,970 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:52:05,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-03 02:52:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:06,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:52:06,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:09,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:14,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1802781810] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:14,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889092665] [2022-11-03 02:52:14,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:14,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:14,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:52:14,143 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:52:14,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-03 02:52:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:14,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:52:14,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 21 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:52:15,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 21 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:52:15,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889092665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:15,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:52:15,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 21, 21, 8, 8] total 57 [2022-11-03 02:52:15,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735313584] [2022-11-03 02:52:15,496 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:52:15,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-03 02:52:15,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:52:15,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-03 02:52:15,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2963, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 02:52:15,497 INFO L87 Difference]: Start difference. First operand 772 states and 1029 transitions. Second operand has 57 states, 57 states have (on average 16.017543859649123) internal successors, (913), 57 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:19,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:19,815 INFO L93 Difference]: Finished difference Result 1482 states and 1962 transitions. [2022-11-03 02:52:19,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-03 02:52:19,816 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 16.017543859649123) internal successors, (913), 57 states have internal predecessors, (913), 0 states have call successors, (0), 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 195 [2022-11-03 02:52:19,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:19,817 INFO L225 Difference]: With dead ends: 1482 [2022-11-03 02:52:19,817 INFO L226 Difference]: Without dead ends: 1127 [2022-11-03 02:52:19,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1222 GetRequests, 1120 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1927 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=837, Invalid=9669, Unknown=0, NotChecked=0, Total=10506 [2022-11-03 02:52:19,819 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 604 mSDsluCounter, 8365 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 8598 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 880 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:19,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 8598 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 326 Invalid, 0 Unknown, 880 Unchecked, 0.4s Time] [2022-11-03 02:52:19,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-11-03 02:52:19,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 988. [2022-11-03 02:52:19,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 987 states have (on average 1.3242147922998986) internal successors, (1307), 987 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:19,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1307 transitions. [2022-11-03 02:52:19,857 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1307 transitions. Word has length 195 [2022-11-03 02:52:19,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:19,857 INFO L495 AbstractCegarLoop]: Abstraction has 988 states and 1307 transitions. [2022-11-03 02:52:19,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 16.017543859649123) internal successors, (913), 57 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:19,858 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1307 transitions. [2022-11-03 02:52:19,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-03 02:52:19,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:19,860 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:19,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:20,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:20,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:20,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:20,480 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:20,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:20,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1603183239, now seen corresponding path program 1 times [2022-11-03 02:52:20,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:52:20,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363607689] [2022-11-03 02:52:20,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:20,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:52:20,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:52:20,484 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:52:20,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 02:52:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:20,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:52:20,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:52:21,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 70 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:52:23,064 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:52:23,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363607689] [2022-11-03 02:52:23,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363607689] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:23,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [573342870] [2022-11-03 02:52:23,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:23,065 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:52:23,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:52:23,066 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:52:23,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-03 02:52:23,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:23,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 02:52:23,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 13 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:27,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 13 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:34,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [573342870] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:34,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976596340] [2022-11-03 02:52:34,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:34,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:34,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:52:34,662 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:52:34,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-03 02:52:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:35,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 02:52:35,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:35,989 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 13 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:35,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 13 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:36,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976596340] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:36,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:52:36,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 46, 46, 25, 25] total 103 [2022-11-03 02:52:36,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730118007] [2022-11-03 02:52:36,510 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:52:36,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-11-03 02:52:36,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:52:36,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-11-03 02:52:36,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=9722, Unknown=0, NotChecked=0, Total=10506 [2022-11-03 02:52:36,516 INFO L87 Difference]: Start difference. First operand 988 states and 1307 transitions. Second operand has 103 states, 103 states have (on average 8.03883495145631) internal successors, (828), 103 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:03,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:03,776 INFO L93 Difference]: Finished difference Result 2550 states and 3339 transitions. [2022-11-03 02:53:03,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-11-03 02:53:03,777 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 8.03883495145631) internal successors, (828), 103 states have internal predecessors, (828), 0 states have call successors, (0), 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 195 [2022-11-03 02:53:03,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:03,778 INFO L225 Difference]: With dead ends: 2550 [2022-11-03 02:53:03,778 INFO L226 Difference]: Without dead ends: 1998 [2022-11-03 02:53:03,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1407 GetRequests, 1146 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15616 ImplicationChecksByTransitivity, 31.5s TimeCoverageRelationStatistics Valid=9213, Invalid=59693, Unknown=0, NotChecked=0, Total=68906 [2022-11-03 02:53:03,782 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 8521 mSDsluCounter, 15996 mSDsCounter, 0 mSdLazyCounter, 3570 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8521 SdHoareTripleChecker+Valid, 16221 SdHoareTripleChecker+Invalid, 4395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 3570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 623 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:03,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8521 Valid, 16221 Invalid, 4395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 3570 Invalid, 0 Unknown, 623 Unchecked, 4.0s Time] [2022-11-03 02:53:03,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2022-11-03 02:53:03,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 988. [2022-11-03 02:53:03,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 987 states have (on average 1.3221884498480243) internal successors, (1305), 987 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:03,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1305 transitions. [2022-11-03 02:53:03,819 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1305 transitions. Word has length 195 [2022-11-03 02:53:03,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:03,819 INFO L495 AbstractCegarLoop]: Abstraction has 988 states and 1305 transitions. [2022-11-03 02:53:03,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 8.03883495145631) internal successors, (828), 103 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:03,820 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1305 transitions. [2022-11-03 02:53:03,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-03 02:53:03,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:03,822 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:03,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:04,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:04,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:04,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:04,435 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:04,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:04,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1411920379, now seen corresponding path program 1 times [2022-11-03 02:53:04,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:04,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640376448] [2022-11-03 02:53:04,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:04,436 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:04,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:04,437 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:04,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 02:53:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:04,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 02:53:04,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 13 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:06,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 13 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:08,140 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:08,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640376448] [2022-11-03 02:53:08,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640376448] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:08,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [317249797] [2022-11-03 02:53:08,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:08,141 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:53:08,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:53:08,146 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:53:08,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-03 02:53:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:09,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 02:53:09,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 13 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:12,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 13 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:15,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [317249797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:15,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079157089] [2022-11-03 02:53:15,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:15,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:15,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:15,738 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:15,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d1fd634-ff99-4562-b221-10eb099f365d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-03 02:53:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:16,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 02:53:16,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 13 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:17,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 13 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:17,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079157089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:17,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:53:17,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 46, 46, 25, 25] total 89 [2022-11-03 02:53:17,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609048028] [2022-11-03 02:53:17,716 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:53:17,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-11-03 02:53:17,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:17,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-11-03 02:53:17,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=732, Invalid=7100, Unknown=0, NotChecked=0, Total=7832 [2022-11-03 02:53:17,720 INFO L87 Difference]: Start difference. First operand 988 states and 1305 transitions. Second operand has 89 states, 89 states have (on average 5.235955056179775) internal successors, (466), 89 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)