./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_am2910_p2.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_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/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_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_am2910_p2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/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_711b5c4c-83a3-47f0-b289-b3e95db388cc/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 e4f52ed6ec31f3f509aad5ffadcb124384802bf78fade278b01364c8156e3d63 --- 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 02:35:06,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:35:06,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:35:06,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:35:06,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:35:06,766 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:35:06,769 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:35:06,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:35:06,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:35:06,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:35:06,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:35:06,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:35:06,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:35:06,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:35:06,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:35:06,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:35:06,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:35:06,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:35:06,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:35:06,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:35:06,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:35:06,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:35:06,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:35:06,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:35:06,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:35:06,807 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:35:06,807 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:35:06,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:35:06,809 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:35:06,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:35:06,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:35:06,812 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:35:06,813 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:35:06,814 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:35:06,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:35:06,816 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:35:06,817 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:35:06,817 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:35:06,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:35:06,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:35:06,819 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:35:06,820 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:35:06,845 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:35:06,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:35:06,846 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:35:06,846 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:35:06,847 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:35:06,847 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:35:06,848 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:35:06,848 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:35:06,848 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:35:06,849 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:35:06,849 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:35:06,849 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:35:06,850 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:35:06,850 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:35:06,851 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:35:06,851 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:35:06,851 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:35:06,852 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:35:06,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:35:06,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:35:06,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:35:06,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:35:06,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:35:06,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:35:06,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:35:06,855 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:35:06,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:35:06,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:35:06,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:35:06,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:35:06,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:35:06,857 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:35:06,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:35:06,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:35:06,858 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:35:06,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:35:06,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:35:06,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:35:06,859 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_711b5c4c-83a3-47f0-b289-b3e95db388cc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4f52ed6ec31f3f509aad5ffadcb124384802bf78fade278b01364c8156e3d63 [2022-11-03 02:35:07,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:35:07,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:35:07,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:35:07,210 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:35:07,214 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:35:07,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_am2910_p2.c [2022-11-03 02:35:07,315 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/data/8c23c16db/c651502c48414046ab899184e68dc8af/FLAG7c2130f74 [2022-11-03 02:35:07,984 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:35:07,984 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_am2910_p2.c [2022-11-03 02:35:08,002 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/data/8c23c16db/c651502c48414046ab899184e68dc8af/FLAG7c2130f74 [2022-11-03 02:35:08,289 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/data/8c23c16db/c651502c48414046ab899184e68dc8af [2022-11-03 02:35:08,292 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:35:08,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:35:08,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:35:08,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:35:08,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:35:08,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:35:08" (1/1) ... [2022-11-03 02:35:08,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fdcc026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:08, skipping insertion in model container [2022-11-03 02:35:08,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:35:08" (1/1) ... [2022-11-03 02:35:08,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:35:08,367 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:35:08,624 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_711b5c4c-83a3-47f0-b289-b3e95db388cc/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_am2910_p2.c[1107,1120] [2022-11-03 02:35:08,757 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:35:08,761 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:35:08,778 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_711b5c4c-83a3-47f0-b289-b3e95db388cc/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_am2910_p2.c[1107,1120] [2022-11-03 02:35:08,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:35:08,901 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:35:08,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:08 WrapperNode [2022-11-03 02:35:08,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:35:08,903 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:35:08,903 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:35:08,904 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:35:08,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:08" (1/1) ... [2022-11-03 02:35:08,941 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:08" (1/1) ... [2022-11-03 02:35:09,023 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 320 [2022-11-03 02:35:09,024 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:35:09,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:35:09,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:35:09,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:35:09,036 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:08" (1/1) ... [2022-11-03 02:35:09,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:08" (1/1) ... [2022-11-03 02:35:09,042 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:08" (1/1) ... [2022-11-03 02:35:09,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:08" (1/1) ... [2022-11-03 02:35:09,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:08" (1/1) ... [2022-11-03 02:35:09,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:08" (1/1) ... [2022-11-03 02:35:09,089 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:08" (1/1) ... [2022-11-03 02:35:09,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:08" (1/1) ... [2022-11-03 02:35:09,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:35:09,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:35:09,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:35:09,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:35:09,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:08" (1/1) ... [2022-11-03 02:35:09,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:35:09,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:09,168 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:35:09,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:35:09,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:35:09,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:35:09,353 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:35:09,355 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:35:10,160 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:35:10,344 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:35:10,345 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:35:10,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:35:10 BoogieIcfgContainer [2022-11-03 02:35:10,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:35:10,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:35:10,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:35:10,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:35:10,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:35:08" (1/3) ... [2022-11-03 02:35:10,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ae1e5ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:35:10, skipping insertion in model container [2022-11-03 02:35:10,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:08" (2/3) ... [2022-11-03 02:35:10,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ae1e5ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:35:10, skipping insertion in model container [2022-11-03 02:35:10,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:35:10" (3/3) ... [2022-11-03 02:35:10,359 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_arrays_am2910_p2.c [2022-11-03 02:35:10,385 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:35:10,386 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:35:10,452 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:35:10,463 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;@b1819fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:35:10,463 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:35:10,470 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 02:35:10,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:35:10,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:10,478 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:35:10,478 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:10,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:10,483 INFO L85 PathProgramCache]: Analyzing trace with hash 2869964, now seen corresponding path program 1 times [2022-11-03 02:35:10,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:10,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309056164] [2022-11-03 02:35:10,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:10,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:35:10,857 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:35:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:35:11,042 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:35:11,049 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:35:11,051 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:35:11,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:35:11,058 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:35:11,063 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:35:11,106 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:35:11,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:35:11 BoogieIcfgContainer [2022-11-03 02:35:11,123 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:35:11,125 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:35:11,125 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:35:11,125 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:35:11,127 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:35:10" (3/4) ... [2022-11-03 02:35:11,130 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:35:11,131 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:35:11,134 INFO L158 Benchmark]: Toolchain (without parser) took 2838.75ms. Allocated memory was 130.0MB in the beginning and 159.4MB in the end (delta: 29.4MB). Free memory was 97.6MB in the beginning and 90.1MB in the end (delta: 7.6MB). Peak memory consumption was 36.6MB. Max. memory is 16.1GB. [2022-11-03 02:35:11,134 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 83.9MB. Free memory was 38.7MB in the beginning and 38.7MB in the end (delta: 79.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:35:11,136 INFO L158 Benchmark]: CACSL2BoogieTranslator took 603.09ms. Allocated memory is still 130.0MB. Free memory was 97.3MB in the beginning and 99.5MB in the end (delta: -2.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:35:11,137 INFO L158 Benchmark]: Boogie Procedure Inliner took 120.57ms. Allocated memory is still 130.0MB. Free memory was 99.5MB in the beginning and 94.2MB in the end (delta: 5.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 02:35:11,144 INFO L158 Benchmark]: Boogie Preprocessor took 90.15ms. Allocated memory is still 130.0MB. Free memory was 94.2MB in the beginning and 91.6MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:35:11,144 INFO L158 Benchmark]: RCFGBuilder took 1232.63ms. Allocated memory was 130.0MB in the beginning and 159.4MB in the end (delta: 29.4MB). Free memory was 91.6MB in the beginning and 123.6MB in the end (delta: -32.0MB). Peak memory consumption was 43.8MB. Max. memory is 16.1GB. [2022-11-03 02:35:11,146 INFO L158 Benchmark]: TraceAbstraction took 772.12ms. Allocated memory is still 159.4MB. Free memory was 122.6MB in the beginning and 90.1MB in the end (delta: 32.5MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2022-11-03 02:35:11,147 INFO L158 Benchmark]: Witness Printer took 6.80ms. Allocated memory is still 159.4MB. Free memory is still 90.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:35:11,156 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 83.9MB. Free memory was 38.7MB in the beginning and 38.7MB in the end (delta: 79.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 603.09ms. Allocated memory is still 130.0MB. Free memory was 97.3MB in the beginning and 99.5MB in the end (delta: -2.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 120.57ms. Allocated memory is still 130.0MB. Free memory was 99.5MB in the beginning and 94.2MB in the end (delta: 5.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 90.15ms. Allocated memory is still 130.0MB. Free memory was 94.2MB in the beginning and 91.6MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1232.63ms. Allocated memory was 130.0MB in the beginning and 159.4MB in the end (delta: 29.4MB). Free memory was 91.6MB in the beginning and 123.6MB in the end (delta: -32.0MB). Peak memory consumption was 43.8MB. Max. memory is 16.1GB. * TraceAbstraction took 772.12ms. Allocated memory is still 159.4MB. Free memory was 122.6MB in the beginning and 90.1MB in the end (delta: 32.5MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Witness Printer took 6.80ms. Allocated memory is still 159.4MB. Free memory is still 90.1MB. 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 127, overapproximation of bitwiseOr at line 119, overapproximation of bitwiseAnd at line 96. 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_5 mask_SORT_5 = (SORT_5)-1 >> (sizeof(SORT_5) * 8 - 12); [L29] const SORT_5 msb_SORT_5 = (SORT_5)1 << (12 - 1); [L31] const SORT_7 mask_SORT_7 = (SORT_7)-1 >> (sizeof(SORT_7) * 8 - 4); [L32] const SORT_7 msb_SORT_7 = (SORT_7)1 << (4 - 1); [L34] const SORT_16 mask_SORT_16 = (SORT_16)-1 >> (sizeof(SORT_16) * 8 - 3); [L35] const SORT_16 msb_SORT_16 = (SORT_16)1 << (3 - 1); [L37] const SORT_1 var_12 = 0; [L38] const SORT_16 var_17 = 0; [L39] const SORT_16 var_20 = 6; [L40] const SORT_16 var_25 = 7; [L41] const SORT_1 var_30 = 1; [L42] const SORT_5 var_34 = 0; [L43] const SORT_7 var_39 = 0; [L44] const SORT_7 var_42 = 8; [L45] const SORT_7 var_44 = 9; [L46] const SORT_7 var_47 = 15; [L47] const SORT_7 var_55 = 12; [L48] const SORT_7 var_58 = 4; [L49] const SORT_7 var_64 = 10; [L50] const SORT_7 var_66 = 11; [L51] const SORT_7 var_69 = 13; [L52] const SORT_7 var_84 = 1; [L53] const SORT_7 var_89 = 5; [L54] const SORT_16 var_114 = 1; [L55] const SORT_16 var_116 = 5; [L56] const SORT_5 var_125 = 1; [L58] SORT_1 input_2; [L59] SORT_1 input_3; [L60] SORT_1 input_4; [L61] SORT_5 input_6; [L62] SORT_7 input_8; [L63] SORT_1 input_9; [L64] SORT_1 input_10; [L65] SORT_1 input_11; [L66] SORT_5 input_93; [L67] SORT_5 input_95; [L68] SORT_5 input_97; [L69] SORT_5 input_99; [L70] SORT_5 input_101; [L71] SORT_5 input_103; [L72] SORT_5 input_105; [L73] SORT_5 input_107; [L74] SORT_5 input_109; [L76] SORT_1 state_13 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L77] SORT_16 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_16; [L78] SORT_16 state_23 = __VERIFIER_nondet_uchar() & mask_SORT_16; [L79] SORT_5 state_35 = __VERIFIER_nondet_ushort() & mask_SORT_5; [L81] SORT_1 init_14_arg_1 = var_12; [L82] state_13 = init_14_arg_1 [L83] SORT_16 init_19_arg_1 = var_17; [L84] state_18 = init_19_arg_1 [L85] SORT_16 init_24_arg_1 = var_17; [L86] state_23 = init_24_arg_1 [L87] SORT_5 init_36_arg_1 = var_34; [L88] state_35 = init_36_arg_1 VAL [init_14_arg_1=0, init_19_arg_1=0, init_24_arg_1=0, init_36_arg_1=0, mask_SORT_1=1, mask_SORT_16=7, mask_SORT_5=4095, mask_SORT_7=15, msb_SORT_1=1, msb_SORT_16=4, msb_SORT_5=2048, msb_SORT_7=8, state_13=0, state_18=0, state_23=0, state_35=0, var_114=1, var_116=5, var_12=0, var_125=1, var_17=0, var_20=6, var_25=7, var_30=1, var_34=0, var_39=0, var_42=8, var_44=9, var_47=15, var_55=12, var_58=4, var_64=10, var_66=11, var_69=13, var_84=1, var_89=5] [L91] input_2 = __VERIFIER_nondet_uchar() [L92] input_3 = __VERIFIER_nondet_uchar() [L93] input_4 = __VERIFIER_nondet_uchar() [L94] input_6 = __VERIFIER_nondet_ushort() [L95] input_8 = __VERIFIER_nondet_uchar() [L96] input_8 = input_8 & mask_SORT_7 [L97] input_9 = __VERIFIER_nondet_uchar() [L98] input_10 = __VERIFIER_nondet_uchar() [L99] input_11 = __VERIFIER_nondet_uchar() [L100] input_93 = __VERIFIER_nondet_ushort() [L101] input_95 = __VERIFIER_nondet_ushort() [L102] input_97 = __VERIFIER_nondet_ushort() [L103] input_99 = __VERIFIER_nondet_ushort() [L104] input_101 = __VERIFIER_nondet_ushort() [L105] input_103 = __VERIFIER_nondet_ushort() [L106] input_105 = __VERIFIER_nondet_ushort() [L107] input_107 = __VERIFIER_nondet_ushort() [L108] input_109 = __VERIFIER_nondet_ushort() [L111] SORT_1 var_15_arg_0 = state_13; [L112] SORT_1 var_15_arg_1 = var_12; [L113] SORT_1 var_15 = var_15_arg_0 == var_15_arg_1; [L114] SORT_16 var_21_arg_0 = state_18; [L115] SORT_16 var_21_arg_1 = var_20; [L116] SORT_1 var_21 = var_21_arg_0 != var_21_arg_1; [L117] SORT_1 var_22_arg_0 = var_15; [L118] SORT_1 var_22_arg_1 = var_21; [L119] SORT_1 var_22 = var_22_arg_0 | var_22_arg_1; [L120] SORT_16 var_26_arg_0 = state_23; [L121] SORT_16 var_26_arg_1 = var_25; [L122] SORT_1 var_26 = var_26_arg_0 == var_26_arg_1; [L123] SORT_1 var_27_arg_0 = var_22; [L124] SORT_1 var_27_arg_1 = var_26; [L125] SORT_1 var_27 = var_27_arg_0 | var_27_arg_1; [L126] SORT_1 var_31_arg_0 = var_27; [L127] SORT_1 var_31 = ~var_31_arg_0; [L128] SORT_1 var_32_arg_0 = var_30; [L129] SORT_1 var_32_arg_1 = var_31; [L130] SORT_1 var_32 = var_32_arg_0 & var_32_arg_1; [L131] var_32 = var_32 & mask_SORT_1 [L132] SORT_1 bad_33_arg_0 = var_32; [L133] CALL __VERIFIER_assert(!(bad_33_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: 0.6s, 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, 0.3s 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 02:35:11,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/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_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/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_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_am2910_p2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/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_711b5c4c-83a3-47f0-b289-b3e95db388cc/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 e4f52ed6ec31f3f509aad5ffadcb124384802bf78fade278b01364c8156e3d63 --- 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 02:35:13,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:35:13,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:35:13,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:35:13,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:35:13,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:35:13,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:35:13,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:35:14,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:35:14,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:35:14,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:35:14,012 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:35:14,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:35:14,013 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:35:14,014 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:35:14,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:35:14,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:35:14,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:35:14,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:35:14,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:35:14,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:35:14,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:35:14,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:35:14,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:35:14,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:35:14,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:35:14,045 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:35:14,050 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:35:14,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:35:14,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:35:14,052 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:35:14,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:35:14,053 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:35:14,054 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:35:14,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:35:14,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:35:14,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:35:14,080 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:35:14,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:35:14,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:35:14,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:35:14,083 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:35:14,104 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:35:14,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:35:14,105 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:35:14,105 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:35:14,106 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:35:14,106 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:35:14,106 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:35:14,106 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:35:14,107 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:35:14,107 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:35:14,107 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:35:14,107 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:35:14,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:35:14,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:35:14,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:35:14,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:35:14,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:35:14,109 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:35:14,109 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:35:14,109 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:35:14,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:35:14,110 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:35:14,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:35:14,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:35:14,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:35:14,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:35:14,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:35:14,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:35:14,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:35:14,112 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:35:14,112 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:35:14,112 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:14,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:35:14,113 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:35:14,113 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:35:14,113 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_711b5c4c-83a3-47f0-b289-b3e95db388cc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4f52ed6ec31f3f509aad5ffadcb124384802bf78fade278b01364c8156e3d63 [2022-11-03 02:35:14,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:35:14,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:35:14,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:35:14,526 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:35:14,527 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:35:14,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_am2910_p2.c [2022-11-03 02:35:14,602 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/data/8b8f28023/069ecfee98b84b6db67784600be6b3fb/FLAGd45bc5712 [2022-11-03 02:35:15,298 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:35:15,299 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_am2910_p2.c [2022-11-03 02:35:15,317 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/data/8b8f28023/069ecfee98b84b6db67784600be6b3fb/FLAGd45bc5712 [2022-11-03 02:35:15,634 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/data/8b8f28023/069ecfee98b84b6db67784600be6b3fb [2022-11-03 02:35:15,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:35:15,638 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:35:15,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:35:15,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:35:15,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:35:15,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:35:15" (1/1) ... [2022-11-03 02:35:15,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60da3588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:15, skipping insertion in model container [2022-11-03 02:35:15,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:35:15" (1/1) ... [2022-11-03 02:35:15,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:35:15,683 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:35:15,839 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_711b5c4c-83a3-47f0-b289-b3e95db388cc/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_am2910_p2.c[1107,1120] [2022-11-03 02:35:16,010 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:35:16,015 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:35:16,029 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_711b5c4c-83a3-47f0-b289-b3e95db388cc/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_am2910_p2.c[1107,1120] [2022-11-03 02:35:16,088 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:35:16,103 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:35:16,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:16 WrapperNode [2022-11-03 02:35:16,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:35:16,105 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:35:16,106 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:35:16,106 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:35:16,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:16" (1/1) ... [2022-11-03 02:35:16,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:16" (1/1) ... [2022-11-03 02:35:16,170 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 320 [2022-11-03 02:35:16,170 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:35:16,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:35:16,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:35:16,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:35:16,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:16" (1/1) ... [2022-11-03 02:35:16,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:16" (1/1) ... [2022-11-03 02:35:16,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:16" (1/1) ... [2022-11-03 02:35:16,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:16" (1/1) ... [2022-11-03 02:35:16,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:16" (1/1) ... [2022-11-03 02:35:16,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:16" (1/1) ... [2022-11-03 02:35:16,204 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:16" (1/1) ... [2022-11-03 02:35:16,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:16" (1/1) ... [2022-11-03 02:35:16,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:35:16,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:35:16,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:35:16,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:35:16,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:16" (1/1) ... [2022-11-03 02:35:16,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:35:16,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:16,269 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:35:16,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:35:16,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:35:16,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:35:16,468 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:35:16,470 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:35:17,155 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:35:17,164 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:35:17,166 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:35:17,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:35:17 BoogieIcfgContainer [2022-11-03 02:35:17,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:35:17,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:35:17,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:35:17,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:35:17,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:35:15" (1/3) ... [2022-11-03 02:35:17,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f10607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:35:17, skipping insertion in model container [2022-11-03 02:35:17,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:16" (2/3) ... [2022-11-03 02:35:17,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f10607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:35:17, skipping insertion in model container [2022-11-03 02:35:17,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:35:17" (3/3) ... [2022-11-03 02:35:17,184 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_arrays_am2910_p2.c [2022-11-03 02:35:17,209 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:35:17,210 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:35:17,318 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:35:17,326 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;@375c67a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:35:17,327 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:35:17,332 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:17,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:35:17,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:17,340 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:35:17,340 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:17,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:17,347 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 02:35:17,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:17,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1708538440] [2022-11-03 02:35:17,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:17,363 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:17,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:17,367 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:17,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:35:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:17,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:35:17,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:17,836 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 02:35:17,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:17,838 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:17,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1708538440] [2022-11-03 02:35:17,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1708538440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:17,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:17,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:17,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868064279] [2022-11-03 02:35:17,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:17,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:17,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:17,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:17,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:17,880 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 02:35:17,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:17,991 INFO L93 Difference]: Finished difference Result 50 states and 75 transitions. [2022-11-03 02:35:17,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:35:17,995 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 02:35:17,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:18,003 INFO L225 Difference]: With dead ends: 50 [2022-11-03 02:35:18,004 INFO L226 Difference]: Without dead ends: 31 [2022-11-03 02:35:18,007 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 02:35:18,011 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:18,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 55 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:18,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-03 02:35:18,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2022-11-03 02:35:18,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:18,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-11-03 02:35:18,047 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 5 [2022-11-03 02:35:18,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:18,048 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-11-03 02:35:18,048 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 02:35:18,049 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-11-03 02:35:18,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:35:18,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:18,050 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:18,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:18,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:18,266 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:18,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:18,267 INFO L85 PathProgramCache]: Analyzing trace with hash -22920079, now seen corresponding path program 1 times [2022-11-03 02:35:18,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:18,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351859099] [2022-11-03 02:35:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:18,269 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:18,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:18,271 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:18,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:35:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:18,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:35:18,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:18,675 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 02:35:18,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:18,676 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:18,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351859099] [2022-11-03 02:35:18,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351859099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:18,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:18,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:35:18,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36436660] [2022-11-03 02:35:18,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:18,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:18,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:18,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:18,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:18,691 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 02:35:18,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:18,857 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2022-11-03 02:35:18,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:35:18,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2022-11-03 02:35:18,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:18,861 INFO L225 Difference]: With dead ends: 64 [2022-11-03 02:35:18,861 INFO L226 Difference]: Without dead ends: 49 [2022-11-03 02:35:18,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:35:18,865 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 59 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:18,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 93 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:18,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-03 02:35:18,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 25. [2022-11-03 02:35:18,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 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 02:35:18,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-11-03 02:35:18,880 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 18 [2022-11-03 02:35:18,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:18,880 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-11-03 02:35:18,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 02:35:18,885 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-11-03 02:35:18,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:35:18,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:18,887 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:18,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:19,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:19,107 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:19,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:19,108 INFO L85 PathProgramCache]: Analyzing trace with hash 657138291, now seen corresponding path program 1 times [2022-11-03 02:35:19,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:19,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2036398350] [2022-11-03 02:35:19,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:19,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:19,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:19,111 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:19,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:35:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:19,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:35:19,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:19,425 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 02:35:19,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:19,425 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:19,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2036398350] [2022-11-03 02:35:19,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2036398350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:19,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:19,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:35:19,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073916604] [2022-11-03 02:35:19,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:19,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:19,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:19,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:19,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:19,429 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 02:35:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:19,568 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2022-11-03 02:35:19,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:35:19,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2022-11-03 02:35:19,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:19,570 INFO L225 Difference]: With dead ends: 64 [2022-11-03 02:35:19,570 INFO L226 Difference]: Without dead ends: 49 [2022-11-03 02:35:19,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:35:19,572 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 51 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:19,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 88 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:19,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-03 02:35:19,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 27. [2022-11-03 02:35:19,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 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 02:35:19,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-11-03 02:35:19,591 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 18 [2022-11-03 02:35:19,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:19,592 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-11-03 02:35:19,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 02:35:19,592 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-11-03 02:35:19,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:35:19,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:19,593 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:19,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:19,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:19,809 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:19,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:19,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1862821643, now seen corresponding path program 1 times [2022-11-03 02:35:19,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:19,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142047961] [2022-11-03 02:35:19,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:19,812 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:19,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:19,813 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:19,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:35:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:20,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:35:20,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:20,254 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 02:35:20,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:20,812 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 02:35:20,812 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:20,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142047961] [2022-11-03 02:35:20,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142047961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:20,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [167274241] [2022-11-03 02:35:20,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:20,813 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:20,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:35:20,820 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:35:20,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-03 02:35:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:21,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:35:21,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:21,429 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 02:35:21,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:21,777 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 02:35:21,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [167274241] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:21,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934974166] [2022-11-03 02:35:21,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:21,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:21,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:21,788 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:21,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:35:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:21,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:35:21,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:22,145 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 02:35:22,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:22,494 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 02:35:22,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934974166] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:22,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:35:22,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7, 6, 7, 7] total 13 [2022-11-03 02:35:22,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915481944] [2022-11-03 02:35:22,495 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:35:22,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:35:22,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:22,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:35:22,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:35:22,497 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 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 02:35:22,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:22,717 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2022-11-03 02:35:22,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:35:22,719 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 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 18 [2022-11-03 02:35:22,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:22,720 INFO L225 Difference]: With dead ends: 46 [2022-11-03 02:35:22,720 INFO L226 Difference]: Without dead ends: 44 [2022-11-03 02:35:22,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:35:22,721 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 152 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:22,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 88 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-03 02:35:22,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-03 02:35:22,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2022-11-03 02:35:22,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 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 02:35:22,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-11-03 02:35:22,729 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 18 [2022-11-03 02:35:22,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:22,730 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-11-03 02:35:22,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 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 02:35:22,730 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-11-03 02:35:22,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:35:22,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:22,732 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:22,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:22,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:23,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:23,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:23,348 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:23,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:23,349 INFO L85 PathProgramCache]: Analyzing trace with hash -986733691, now seen corresponding path program 1 times [2022-11-03 02:35:23,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:23,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050966662] [2022-11-03 02:35:23,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:23,350 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:23,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:23,352 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:23,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:35:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:23,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:35:23,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:24,031 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:24,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:24,537 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:24,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050966662] [2022-11-03 02:35:24,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050966662] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:24,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1009706573] [2022-11-03 02:35:24,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:24,538 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:24,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:35:24,540 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:35:24,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-03 02:35:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:25,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:35:25,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:25,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:25,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1009706573] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:25,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490541767] [2022-11-03 02:35:25,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:25,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:25,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:25,435 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:25,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:35:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:25,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:35:25,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:25,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:25,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490541767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:25,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:35:25,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 22 [2022-11-03 02:35:25,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377746649] [2022-11-03 02:35:25,977 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:35:25,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 02:35:25,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:25,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 02:35:25,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:35:25,982 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 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 02:35:27,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:27,818 INFO L93 Difference]: Finished difference Result 183 states and 231 transitions. [2022-11-03 02:35:27,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 02:35:27,821 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 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 31 [2022-11-03 02:35:27,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:27,822 INFO L225 Difference]: With dead ends: 183 [2022-11-03 02:35:27,822 INFO L226 Difference]: Without dead ends: 168 [2022-11-03 02:35:27,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 167 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=665, Invalid=2197, Unknown=0, NotChecked=0, Total=2862 [2022-11-03 02:35:27,824 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 574 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 362 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:27,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 271 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 163 Invalid, 0 Unknown, 362 Unchecked, 0.5s Time] [2022-11-03 02:35:27,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-03 02:35:27,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 64. [2022-11-03 02:35:27,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 0 states have call successors, (0), 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 02:35:27,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2022-11-03 02:35:27,853 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 31 [2022-11-03 02:35:27,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:27,853 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2022-11-03 02:35:27,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 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 02:35:27,854 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2022-11-03 02:35:27,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:35:27,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:27,855 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:27,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:28,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:28,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:28,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:28,460 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:28,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:28,461 INFO L85 PathProgramCache]: Analyzing trace with hash -306675321, now seen corresponding path program 1 times [2022-11-03 02:35:28,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:28,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534541713] [2022-11-03 02:35:28,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:28,462 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:28,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:28,464 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:28,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:35:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:28,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 02:35:28,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:35:29,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:30,530 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:35:30,530 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:30,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534541713] [2022-11-03 02:35:30,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534541713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:30,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1105354296] [2022-11-03 02:35:30,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:30,531 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:30,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:35:30,533 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:35:30,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-03 02:35:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:31,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 02:35:31,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:31,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:33,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1105354296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:33,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685728034] [2022-11-03 02:35:33,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:33,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:33,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:33,543 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:33,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:35:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:33,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 02:35:33,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:34,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:36,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685728034] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:36,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:35:36,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 14, 14, 15, 15] total 49 [2022-11-03 02:35:36,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190696797] [2022-11-03 02:35:36,673 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:35:36,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 02:35:36,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:36,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 02:35:36,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2196, Unknown=0, NotChecked=0, Total=2352 [2022-11-03 02:35:36,676 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand has 49 states, 49 states have (on average 2.6122448979591835) internal successors, (128), 49 states have internal predecessors, (128), 0 states have call successors, (0), 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 02:35:42,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:42,590 INFO L93 Difference]: Finished difference Result 178 states and 231 transitions. [2022-11-03 02:35:42,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-03 02:35:42,590 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.6122448979591835) internal successors, (128), 49 states have internal predecessors, (128), 0 states have call successors, (0), 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 31 [2022-11-03 02:35:42,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:42,592 INFO L225 Difference]: With dead ends: 178 [2022-11-03 02:35:42,592 INFO L226 Difference]: Without dead ends: 142 [2022-11-03 02:35:42,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1755 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1777, Invalid=7153, Unknown=0, NotChecked=0, Total=8930 [2022-11-03 02:35:42,596 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 657 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 408 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:42,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [657 Valid, 276 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 176 Invalid, 0 Unknown, 408 Unchecked, 0.5s Time] [2022-11-03 02:35:42,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-03 02:35:42,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 66. [2022-11-03 02:35:42,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 65 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:42,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2022-11-03 02:35:42,609 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 31 [2022-11-03 02:35:42,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:42,609 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2022-11-03 02:35:42,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.6122448979591835) internal successors, (128), 49 states have internal predecessors, (128), 0 states have call successors, (0), 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 02:35:42,610 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2022-11-03 02:35:42,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:35:42,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:42,611 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:42,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:42,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:43,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2022-11-03 02:35:43,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:43,227 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:43,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:43,228 INFO L85 PathProgramCache]: Analyzing trace with hash 922287177, now seen corresponding path program 1 times [2022-11-03 02:35:43,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:43,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [12286495] [2022-11-03 02:35:43,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:43,229 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:43,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:43,231 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:43,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:35:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:43,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 02:35:43,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:35:43,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:43,833 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:43,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [12286495] [2022-11-03 02:35:43,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [12286495] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:43,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:43,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:35:43,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379671001] [2022-11-03 02:35:43,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:43,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:35:43,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:43,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:35:43,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:43,836 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:43,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:43,945 INFO L93 Difference]: Finished difference Result 166 states and 208 transitions. [2022-11-03 02:35:43,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:35:43,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 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 31 [2022-11-03 02:35:43,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:43,946 INFO L225 Difference]: With dead ends: 166 [2022-11-03 02:35:43,947 INFO L226 Difference]: Without dead ends: 108 [2022-11-03 02:35:43,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:35:43,948 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:43,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 91 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2022-11-03 02:35:43,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-03 02:35:43,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2022-11-03 02:35:43,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 67 states have internal predecessors, (86), 0 states have call successors, (0), 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 02:35:43,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2022-11-03 02:35:43,979 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 31 [2022-11-03 02:35:43,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:43,979 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2022-11-03 02:35:43,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:43,980 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2022-11-03 02:35:43,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:35:43,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:43,982 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:44,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-11-03 02:35:44,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:44,198 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:44,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:44,198 INFO L85 PathProgramCache]: Analyzing trace with hash 850313285, now seen corresponding path program 1 times [2022-11-03 02:35:44,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:44,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174375410] [2022-11-03 02:35:44,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:44,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:44,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:44,200 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:44,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:35:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:44,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:35:44,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:44,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:45,363 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:45,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174375410] [2022-11-03 02:35:45,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174375410] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:45,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2058417350] [2022-11-03 02:35:45,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:45,364 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:45,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:35:45,366 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:35:45,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-03 02:35:45,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:45,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:35:45,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:45,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:46,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2058417350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:46,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090948014] [2022-11-03 02:35:46,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:46,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:46,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:46,093 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:46,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 02:35:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:46,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:35:46,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:46,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:46,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090948014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:46,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:35:46,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 22 [2022-11-03 02:35:46,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954640328] [2022-11-03 02:35:46,666 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:35:46,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 02:35:46,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:46,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 02:35:46,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:35:46,668 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 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 02:35:47,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:47,405 INFO L93 Difference]: Finished difference Result 216 states and 271 transitions. [2022-11-03 02:35:47,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:35:47,406 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 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 31 [2022-11-03 02:35:47,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:47,408 INFO L225 Difference]: With dead ends: 216 [2022-11-03 02:35:47,408 INFO L226 Difference]: Without dead ends: 158 [2022-11-03 02:35:47,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:35:47,410 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 168 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:47,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 417 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 132 Invalid, 0 Unknown, 168 Unchecked, 0.2s Time] [2022-11-03 02:35:47,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-03 02:35:47,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 98. [2022-11-03 02:35:47,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.268041237113402) internal successors, (123), 97 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:47,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 123 transitions. [2022-11-03 02:35:47,428 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 123 transitions. Word has length 31 [2022-11-03 02:35:47,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:47,429 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 123 transitions. [2022-11-03 02:35:47,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 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 02:35:47,429 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 123 transitions. [2022-11-03 02:35:47,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:35:47,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:47,431 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:47,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:47,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:47,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:48,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:48,036 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:48,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:48,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1530371655, now seen corresponding path program 1 times [2022-11-03 02:35:48,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:48,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21054579] [2022-11-03 02:35:48,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:48,038 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:48,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:48,039 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:48,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:35:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:48,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:35:48,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:48,589 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:35:48,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:50,119 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:50,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21054579] [2022-11-03 02:35:50,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21054579] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:50,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [815232054] [2022-11-03 02:35:50,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:50,120 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:50,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:35:50,121 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:35:50,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 02:35:50,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:50,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:35:50,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:35:50,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:51,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [815232054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:51,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754992378] [2022-11-03 02:35:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:51,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:51,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:51,122 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:51,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 02:35:51,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:51,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 02:35:51,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:51,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:53,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754992378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:53,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:35:53,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13, 14, 15, 15] total 41 [2022-11-03 02:35:53,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067363774] [2022-11-03 02:35:53,543 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:35:53,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-03 02:35:53,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:53,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-03 02:35:53,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1502, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 02:35:53,545 INFO L87 Difference]: Start difference. First operand 98 states and 123 transitions. Second operand has 41 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 41 states have internal predecessors, (78), 0 states have call successors, (0), 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 02:35:54,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:54,882 INFO L93 Difference]: Finished difference Result 195 states and 244 transitions. [2022-11-03 02:35:54,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:35:54,884 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 41 states have internal predecessors, (78), 0 states have call successors, (0), 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 31 [2022-11-03 02:35:54,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:54,886 INFO L225 Difference]: With dead ends: 195 [2022-11-03 02:35:54,886 INFO L226 Difference]: Without dead ends: 193 [2022-11-03 02:35:54,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 139 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=490, Invalid=2590, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 02:35:54,891 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 221 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:54,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 429 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 160 Invalid, 0 Unknown, 198 Unchecked, 0.4s Time] [2022-11-03 02:35:54,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-03 02:35:54,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 85. [2022-11-03 02:35:54,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2738095238095237) internal successors, (107), 84 states have internal predecessors, (107), 0 states have call successors, (0), 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 02:35:54,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2022-11-03 02:35:54,930 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 31 [2022-11-03 02:35:54,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:54,931 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2022-11-03 02:35:54,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 41 states have internal predecessors, (78), 0 states have call successors, (0), 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 02:35:54,932 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2022-11-03 02:35:54,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:35:54,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:54,937 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:54,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:55,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:55,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-11-03 02:35:55,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:55,552 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:55,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:55,553 INFO L85 PathProgramCache]: Analyzing trace with hash 984326791, now seen corresponding path program 1 times [2022-11-03 02:35:55,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:55,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134606424] [2022-11-03 02:35:55,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:55,554 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:55,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:55,555 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:55,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:35:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:55,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 02:35:55,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:35:56,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:36:12,012 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:12,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134606424] [2022-11-03 02:36:12,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134606424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:12,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1161714345] [2022-11-03 02:36:12,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:12,013 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:12,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:36:12,014 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:36:12,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-03 02:36:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:12,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 02:36:12,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:12,988 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:12,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:14,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1161714345] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:14,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634166102] [2022-11-03 02:36:14,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:14,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:14,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:14,618 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:14,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-03 02:36:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:14,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:36:14,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:15,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:15,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634166102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:15,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:36:15,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 13, 13, 14, 14] total 32 [2022-11-03 02:36:15,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942692326] [2022-11-03 02:36:15,802 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:36:15,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-03 02:36:15,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:15,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-03 02:36:15,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:36:15,805 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand has 32 states, 32 states have (on average 3.34375) internal successors, (107), 32 states have internal predecessors, (107), 0 states have call successors, (0), 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 02:36:18,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:18,246 INFO L93 Difference]: Finished difference Result 216 states and 275 transitions. [2022-11-03 02:36:18,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-03 02:36:18,247 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.34375) internal successors, (107), 32 states have internal predecessors, (107), 0 states have call successors, (0), 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 31 [2022-11-03 02:36:18,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:18,248 INFO L225 Difference]: With dead ends: 216 [2022-11-03 02:36:18,248 INFO L226 Difference]: Without dead ends: 158 [2022-11-03 02:36:18,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=376, Invalid=2816, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 02:36:18,250 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 95 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:18,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 670 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 165 Invalid, 0 Unknown, 197 Unchecked, 0.3s Time] [2022-11-03 02:36:18,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-03 02:36:18,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 117. [2022-11-03 02:36:18,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.2758620689655173) internal successors, (148), 116 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:18,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 148 transitions. [2022-11-03 02:36:18,266 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 148 transitions. Word has length 31 [2022-11-03 02:36:18,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:18,266 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 148 transitions. [2022-11-03 02:36:18,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.34375) internal successors, (107), 32 states have internal predecessors, (107), 0 states have call successors, (0), 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 02:36:18,267 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 148 transitions. [2022-11-03 02:36:18,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:36:18,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:18,268 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:18,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:18,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:18,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:18,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:18,876 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:18,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:18,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1664385161, now seen corresponding path program 1 times [2022-11-03 02:36:18,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:18,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457836247] [2022-11-03 02:36:18,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:18,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:18,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:18,882 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:18,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:36:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:19,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:36:19,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:19,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:20,897 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:20,897 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:20,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457836247] [2022-11-03 02:36:20,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457836247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:20,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1742373514] [2022-11-03 02:36:20,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:20,898 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:20,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:36:20,900 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:36:20,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-03 02:36:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:21,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 02:36:21,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:21,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:23,255 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:23,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1742373514] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:23,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806543623] [2022-11-03 02:36:23,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:23,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:23,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:23,257 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:23,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-03 02:36:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:23,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:36:23,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:23,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:24,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806543623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:24,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:36:24,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 14, 14] total 42 [2022-11-03 02:36:24,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656945143] [2022-11-03 02:36:24,326 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:36:24,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 02:36:24,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:24,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 02:36:24,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1577, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 02:36:24,328 INFO L87 Difference]: Start difference. First operand 117 states and 148 transitions. Second operand has 42 states, 42 states have (on average 2.4285714285714284) internal successors, (102), 42 states have internal predecessors, (102), 0 states have call successors, (0), 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 02:36:25,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:25,205 INFO L93 Difference]: Finished difference Result 228 states and 290 transitions. [2022-11-03 02:36:25,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 02:36:25,207 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4285714285714284) internal successors, (102), 42 states have internal predecessors, (102), 0 states have call successors, (0), 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 31 [2022-11-03 02:36:25,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:25,208 INFO L225 Difference]: With dead ends: 228 [2022-11-03 02:36:25,209 INFO L226 Difference]: Without dead ends: 226 [2022-11-03 02:36:25,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=277, Invalid=2479, Unknown=0, NotChecked=0, Total=2756 [2022-11-03 02:36:25,211 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 116 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:25,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 671 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 118 Invalid, 0 Unknown, 168 Unchecked, 0.2s Time] [2022-11-03 02:36:25,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-11-03 02:36:25,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 130. [2022-11-03 02:36:25,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.2868217054263567) internal successors, (166), 129 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 02:36:25,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 166 transitions. [2022-11-03 02:36:25,239 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 166 transitions. Word has length 31 [2022-11-03 02:36:25,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:25,240 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 166 transitions. [2022-11-03 02:36:25,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.4285714285714284) internal successors, (102), 42 states have internal predecessors, (102), 0 states have call successors, (0), 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 02:36:25,240 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 166 transitions. [2022-11-03 02:36:25,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:36:25,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:25,241 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:25,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:25,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:25,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:25,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:25,842 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:25,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:25,843 INFO L85 PathProgramCache]: Analyzing trace with hash 963320583, now seen corresponding path program 1 times [2022-11-03 02:36:25,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:25,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369522677] [2022-11-03 02:36:25,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:25,844 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:25,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:25,845 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:25,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 02:36:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:26,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 02:36:26,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:26,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:36:26,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:36:28,512 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:28,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369522677] [2022-11-03 02:36:28,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369522677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:28,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [189370145] [2022-11-03 02:36:28,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:28,512 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:28,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:36:28,513 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:36:28,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-03 02:36:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:28,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 02:36:28,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:29,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:30,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [189370145] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:30,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010727719] [2022-11-03 02:36:30,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:30,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:30,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:30,876 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:30,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-03 02:36:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:31,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:36:31,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:31,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:31,916 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:31,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010727719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:31,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:36:31,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 13, 13, 14, 14] total 32 [2022-11-03 02:36:31,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447902633] [2022-11-03 02:36:31,917 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:36:31,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-03 02:36:31,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:31,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-03 02:36:31,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:36:31,919 INFO L87 Difference]: Start difference. First operand 130 states and 166 transitions. Second operand has 32 states, 32 states have (on average 3.34375) internal successors, (107), 32 states have internal predecessors, (107), 0 states have call successors, (0), 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 02:36:34,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:34,160 INFO L93 Difference]: Finished difference Result 264 states and 333 transitions. [2022-11-03 02:36:34,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-03 02:36:34,161 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.34375) internal successors, (107), 32 states have internal predecessors, (107), 0 states have call successors, (0), 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 31 [2022-11-03 02:36:34,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:34,162 INFO L225 Difference]: With dead ends: 264 [2022-11-03 02:36:34,162 INFO L226 Difference]: Without dead ends: 204 [2022-11-03 02:36:34,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=380, Invalid=3160, Unknown=0, NotChecked=0, Total=3540 [2022-11-03 02:36:34,164 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 141 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 362 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:34,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 806 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 199 Invalid, 0 Unknown, 362 Unchecked, 0.4s Time] [2022-11-03 02:36:34,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-03 02:36:34,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 126. [2022-11-03 02:36:34,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.28) internal successors, (160), 125 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:34,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 160 transitions. [2022-11-03 02:36:34,175 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 160 transitions. Word has length 31 [2022-11-03 02:36:34,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:34,176 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 160 transitions. [2022-11-03 02:36:34,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.34375) internal successors, (107), 32 states have internal predecessors, (107), 0 states have call successors, (0), 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 02:36:34,176 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 160 transitions. [2022-11-03 02:36:34,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:36:34,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:34,177 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:34,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-03 02:36:34,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2022-11-03 02:36:34,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:34,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:34,778 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:34,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:34,778 INFO L85 PathProgramCache]: Analyzing trace with hash -2078551163, now seen corresponding path program 1 times [2022-11-03 02:36:34,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:34,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986582950] [2022-11-03 02:36:34,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:34,779 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:34,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:34,780 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:34,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 02:36:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:35,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:36:35,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:35,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:36,695 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:36,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986582950] [2022-11-03 02:36:36,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986582950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:36,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1536478902] [2022-11-03 02:36:36,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:36,696 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:36,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:36:36,697 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:36:36,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-03 02:36:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:37,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 02:36:37,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:37,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:38,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1536478902] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:38,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774761140] [2022-11-03 02:36:38,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:38,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:38,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:38,938 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:38,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-03 02:36:39,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:39,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:36:39,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:39,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:40,071 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:40,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774761140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:40,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:36:40,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 14, 14] total 42 [2022-11-03 02:36:40,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600039201] [2022-11-03 02:36:40,072 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:36:40,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 02:36:40,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:40,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 02:36:40,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1577, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 02:36:40,074 INFO L87 Difference]: Start difference. First operand 126 states and 160 transitions. Second operand has 42 states, 42 states have (on average 2.4285714285714284) internal successors, (102), 42 states have internal predecessors, (102), 0 states have call successors, (0), 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 02:36:40,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:40,725 INFO L93 Difference]: Finished difference Result 182 states and 227 transitions. [2022-11-03 02:36:40,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 02:36:40,725 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4285714285714284) internal successors, (102), 42 states have internal predecessors, (102), 0 states have call successors, (0), 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 31 [2022-11-03 02:36:40,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:40,727 INFO L225 Difference]: With dead ends: 182 [2022-11-03 02:36:40,727 INFO L226 Difference]: Without dead ends: 180 [2022-11-03 02:36:40,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=239, Invalid=2311, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 02:36:40,729 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 108 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:40,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 483 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 162 Unchecked, 0.1s Time] [2022-11-03 02:36:40,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-03 02:36:40,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 126. [2022-11-03 02:36:40,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.28) internal successors, (160), 125 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:40,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 160 transitions. [2022-11-03 02:36:40,750 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 160 transitions. Word has length 31 [2022-11-03 02:36:40,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:40,750 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 160 transitions. [2022-11-03 02:36:40,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.4285714285714284) internal successors, (102), 42 states have internal predecessors, (102), 0 states have call successors, (0), 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 02:36:40,751 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 160 transitions. [2022-11-03 02:36:40,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:36:40,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:40,752 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:40,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:40,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-03 02:36:41,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:41,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:41,365 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:41,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:41,365 INFO L85 PathProgramCache]: Analyzing trace with hash 816954805, now seen corresponding path program 2 times [2022-11-03 02:36:41,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:41,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109189084] [2022-11-03 02:36:41,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:36:41,366 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:41,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:41,367 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:41,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 02:36:41,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:36:41,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:36:41,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 02:36:41,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:36:42,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:44,247 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:36:44,247 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:44,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109189084] [2022-11-03 02:36:44,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109189084] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:44,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1075530057] [2022-11-03 02:36:44,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:36:44,249 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:44,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:36:44,250 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:36:44,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-03 02:36:44,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:36:44,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:36:44,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 02:36:44,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:45,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:49,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1075530057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:49,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075055987] [2022-11-03 02:36:49,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:36:49,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:49,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:49,605 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:49,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-03 02:36:49,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:36:49,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:36:49,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-03 02:36:49,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:36:51,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:36:54,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075055987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:54,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:36:54,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 21, 21, 10, 8] total 55 [2022-11-03 02:36:54,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635486313] [2022-11-03 02:36:54,103 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:36:54,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-03 02:36:54,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:54,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-03 02:36:54,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2814, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 02:36:54,106 INFO L87 Difference]: Start difference. First operand 126 states and 160 transitions. Second operand has 55 states, 55 states have (on average 2.8727272727272726) internal successors, (158), 55 states have internal predecessors, (158), 0 states have call successors, (0), 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 02:36:58,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:58,492 INFO L93 Difference]: Finished difference Result 267 states and 339 transitions. [2022-11-03 02:36:58,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 02:36:58,493 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.8727272727272726) internal successors, (158), 55 states have internal predecessors, (158), 0 states have call successors, (0), 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 44 [2022-11-03 02:36:58,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:58,494 INFO L225 Difference]: With dead ends: 267 [2022-11-03 02:36:58,494 INFO L226 Difference]: Without dead ends: 209 [2022-11-03 02:36:58,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 205 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=568, Invalid=5438, Unknown=0, NotChecked=0, Total=6006 [2022-11-03 02:36:58,497 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 177 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:58,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 624 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 260 Invalid, 0 Unknown, 377 Unchecked, 0.5s Time] [2022-11-03 02:36:58,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-11-03 02:36:58,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 139. [2022-11-03 02:36:58,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.2681159420289856) internal successors, (175), 138 states have internal predecessors, (175), 0 states have call successors, (0), 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 02:36:58,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 175 transitions. [2022-11-03 02:36:58,514 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 175 transitions. Word has length 44 [2022-11-03 02:36:58,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:58,514 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 175 transitions. [2022-11-03 02:36:58,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.8727272727272726) internal successors, (158), 55 states have internal predecessors, (158), 0 states have call successors, (0), 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 02:36:58,515 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 175 transitions. [2022-11-03 02:36:58,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:36:58,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:58,516 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:58,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:58,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-03 02:36:58,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:59,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:59,139 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:59,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:59,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1562629363, now seen corresponding path program 1 times [2022-11-03 02:36:59,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:59,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2080562979] [2022-11-03 02:36:59,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:59,141 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:59,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:59,142 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:59,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 02:36:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:59,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-03 02:36:59,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:37:00,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:10,076 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:37:10,077 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:10,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2080562979] [2022-11-03 02:37:10,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2080562979] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:10,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1706575520] [2022-11-03 02:37:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:10,077 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:37:10,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:37:10,078 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:37:10,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-03 02:37:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:10,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:37:10,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:37:12,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:37:14,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1706575520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:14,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364331348] [2022-11-03 02:37:14,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:14,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:14,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:14,536 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:37:14,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-03 02:37:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:14,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:37:14,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:15,175 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:37:15,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:37:15,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364331348] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:15,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:37:15,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16, 16, 16, 16] total 58 [2022-11-03 02:37:15,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093862341] [2022-11-03 02:37:15,630 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:37:15,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-03 02:37:15,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:15,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-03 02:37:15,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3122, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 02:37:15,633 INFO L87 Difference]: Start difference. First operand 139 states and 175 transitions. Second operand has 58 states, 58 states have (on average 2.1551724137931036) internal successors, (125), 58 states have internal predecessors, (125), 0 states have call successors, (0), 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 02:38:32,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:32,987 INFO L93 Difference]: Finished difference Result 1517 states and 1831 transitions. [2022-11-03 02:38:32,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2022-11-03 02:38:32,988 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1551724137931036) internal successors, (125), 58 states have internal predecessors, (125), 0 states have call successors, (0), 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 44 [2022-11-03 02:38:32,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:32,994 INFO L225 Difference]: With dead ends: 1517 [2022-11-03 02:38:32,995 INFO L226 Difference]: Without dead ends: 1459 [2022-11-03 02:38:33,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 208 SyntacticMatches, 74 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 36866 ImplicationChecksByTransitivity, 84.1s TimeCoverageRelationStatistics Valid=8059, Invalid=71747, Unknown=0, NotChecked=0, Total=79806 [2022-11-03 02:38:33,008 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 959 mSDsluCounter, 4734 mSDsCounter, 0 mSdLazyCounter, 1680 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 4850 SdHoareTripleChecker+Invalid, 5258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3506 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:33,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [959 Valid, 4850 Invalid, 5258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1680 Invalid, 0 Unknown, 3506 Unchecked, 2.8s Time] [2022-11-03 02:38:33,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2022-11-03 02:38:33,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 430. [2022-11-03 02:38:33,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 1.2867132867132867) internal successors, (552), 429 states have internal predecessors, (552), 0 states have call successors, (0), 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 02:38:33,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 552 transitions. [2022-11-03 02:38:33,082 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 552 transitions. Word has length 44 [2022-11-03 02:38:33,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:33,082 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 552 transitions. [2022-11-03 02:38:33,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.1551724137931036) internal successors, (125), 58 states have internal predecessors, (125), 0 states have call successors, (0), 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 02:38:33,083 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 552 transitions. [2022-11-03 02:38:33,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:38:33,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:33,084 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:38:33,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-03 02:38:33,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:33,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:33,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:33,686 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:33,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:33,686 INFO L85 PathProgramCache]: Analyzing trace with hash 248543027, now seen corresponding path program 1 times [2022-11-03 02:38:33,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:33,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207175011] [2022-11-03 02:38:33,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:33,688 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:33,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:33,689 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:33,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 02:38:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:34,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:38:34,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:38:34,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:37,158 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:37,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207175011] [2022-11-03 02:38:37,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207175011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:37,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1904559090] [2022-11-03 02:38:37,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:37,159 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:37,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:38:37,160 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:38:37,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-03 02:38:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:37,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:38:37,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:38:38,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:38,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1904559090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:38,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787033103] [2022-11-03 02:38:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:38,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:38,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:38:38,598 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:38:38,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-03 02:38:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:38,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 02:38:38,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:38:39,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:38:40,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787033103] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:40,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:38:40,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 15, 22, 18, 18] total 49 [2022-11-03 02:38:40,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371956748] [2022-11-03 02:38:40,900 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:38:40,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 02:38:40,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:40,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 02:38:40,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2190, Unknown=0, NotChecked=0, Total=2352 [2022-11-03 02:38:40,902 INFO L87 Difference]: Start difference. First operand 430 states and 552 transitions. Second operand has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 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 02:38:44,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:44,109 INFO L93 Difference]: Finished difference Result 860 states and 1092 transitions. [2022-11-03 02:38:44,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-03 02:38:44,110 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 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 44 [2022-11-03 02:38:44,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:44,113 INFO L225 Difference]: With dead ends: 860 [2022-11-03 02:38:44,113 INFO L226 Difference]: Without dead ends: 858 [2022-11-03 02:38:44,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 208 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2359 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1158, Invalid=7962, Unknown=0, NotChecked=0, Total=9120 [2022-11-03 02:38:44,116 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 477 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 505 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:44,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 1173 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 237 Invalid, 0 Unknown, 505 Unchecked, 0.5s Time] [2022-11-03 02:38:44,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-11-03 02:38:44,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 516. [2022-11-03 02:38:44,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 1.2854368932038835) internal successors, (662), 515 states have internal predecessors, (662), 0 states have call successors, (0), 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 02:38:44,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 662 transitions. [2022-11-03 02:38:44,188 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 662 transitions. Word has length 44 [2022-11-03 02:38:44,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:44,188 INFO L495 AbstractCegarLoop]: Abstraction has 516 states and 662 transitions. [2022-11-03 02:38:44,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 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 02:38:44,189 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 662 transitions. [2022-11-03 02:38:44,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:38:44,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:44,190 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:38:44,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:44,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:44,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:44,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:44,797 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:44,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:44,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1696642869, now seen corresponding path program 1 times [2022-11-03 02:38:44,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:44,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307121167] [2022-11-03 02:38:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:44,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:44,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:44,800 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:44,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 02:38:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:45,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 02:38:45,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:38:46,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:39:11,763 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:11,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307121167] [2022-11-03 02:39:11,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307121167] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:11,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1592094328] [2022-11-03 02:39:11,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:11,764 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:11,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:39:11,766 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:39:11,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-03 02:39:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:12,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 02:39:12,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:13,338 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:13,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:16,904 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:16,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1592094328] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:16,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257949375] [2022-11-03 02:39:16,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:16,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:16,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:16,906 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:39:16,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-03 02:39:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:17,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-03 02:39:17,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:17,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:18,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257949375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:18,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:39:18,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 21, 21, 22, 22] total 48 [2022-11-03 02:39:18,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193993964] [2022-11-03 02:39:18,295 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:39:18,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 02:39:18,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:18,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 02:39:18,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2131, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 02:39:18,297 INFO L87 Difference]: Start difference. First operand 516 states and 662 transitions. Second operand has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 48 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:23,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:23,433 INFO L93 Difference]: Finished difference Result 936 states and 1204 transitions. [2022-11-03 02:39:23,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-03 02:39:23,434 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 48 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-03 02:39:23,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:23,436 INFO L225 Difference]: With dead ends: 936 [2022-11-03 02:39:23,436 INFO L226 Difference]: Without dead ends: 587 [2022-11-03 02:39:23,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=660, Invalid=7172, Unknown=0, NotChecked=0, Total=7832 [2022-11-03 02:39:23,439 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 131 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 511 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:23,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 1192 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 365 Invalid, 0 Unknown, 511 Unchecked, 0.6s Time] [2022-11-03 02:39:23,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-11-03 02:39:23,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 418. [2022-11-03 02:39:23,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.2709832134292567) internal successors, (530), 417 states have internal predecessors, (530), 0 states have call successors, (0), 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 02:39:23,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 530 transitions. [2022-11-03 02:39:23,516 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 530 transitions. Word has length 44 [2022-11-03 02:39:23,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:23,516 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 530 transitions. [2022-11-03 02:39:23,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 48 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:23,517 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 530 transitions. [2022-11-03 02:39:23,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:39:23,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:23,518 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:23,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:23,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:23,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:24,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:24,130 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:24,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:24,131 INFO L85 PathProgramCache]: Analyzing trace with hash -665170507, now seen corresponding path program 2 times [2022-11-03 02:39:24,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:24,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468413953] [2022-11-03 02:39:24,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:39:24,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:24,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:24,133 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:24,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 02:39:24,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:39:24,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:39:24,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-03 02:39:24,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:26,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:41,475 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:41,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468413953] [2022-11-03 02:39:41,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468413953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:41,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [260647697] [2022-11-03 02:39:41,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:39:41,475 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:41,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:39:41,476 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:39:41,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-03 02:39:41,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:39:41,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:39:42,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 02:39:42,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:44,984 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:44,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:52,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [260647697] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:52,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976841115] [2022-11-03 02:39:52,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:39:52,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:52,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:52,254 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:39:52,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-03 02:39:52,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:39:52,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:39:52,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 02:39:52,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:39:53,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:40:12,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976841115] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:12,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:40:12,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 21, 21, 6, 6] total 86 [2022-11-03 02:40:12,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535426007] [2022-11-03 02:40:12,630 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:40:12,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-03 02:40:12,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:40:12,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-03 02:40:12,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=7043, Unknown=0, NotChecked=0, Total=7310 [2022-11-03 02:40:12,632 INFO L87 Difference]: Start difference. First operand 418 states and 530 transitions. Second operand has 86 states, 86 states have (on average 2.395348837209302) internal successors, (206), 86 states have internal predecessors, (206), 0 states have call successors, (0), 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 02:40:23,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:23,617 INFO L93 Difference]: Finished difference Result 857 states and 1074 transitions. [2022-11-03 02:40:23,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-03 02:40:23,619 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.395348837209302) internal successors, (206), 86 states have internal predecessors, (206), 0 states have call successors, (0), 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 44 [2022-11-03 02:40:23,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:23,621 INFO L225 Difference]: With dead ends: 857 [2022-11-03 02:40:23,621 INFO L226 Difference]: Without dead ends: 677 [2022-11-03 02:40:23,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=2005, Invalid=17455, Unknown=0, NotChecked=0, Total=19460 [2022-11-03 02:40:23,624 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 826 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 979 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:23,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 1590 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 859 Invalid, 0 Unknown, 979 Unchecked, 1.3s Time] [2022-11-03 02:40:23,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-11-03 02:40:23,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 402. [2022-11-03 02:40:23,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.256857855361596) internal successors, (504), 401 states have internal predecessors, (504), 0 states have call successors, (0), 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 02:40:23,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 504 transitions. [2022-11-03 02:40:23,697 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 504 transitions. Word has length 44 [2022-11-03 02:40:23,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:23,698 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 504 transitions. [2022-11-03 02:40:23,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.395348837209302) internal successors, (206), 86 states have internal predecessors, (206), 0 states have call successors, (0), 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 02:40:23,698 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 504 transitions. [2022-11-03 02:40:23,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:40:23,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:23,700 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:23,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:23,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:24,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:24,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:24,305 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:24,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:24,305 INFO L85 PathProgramCache]: Analyzing trace with hash -884307851, now seen corresponding path program 1 times [2022-11-03 02:40:24,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:40:24,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586524077] [2022-11-03 02:40:24,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:24,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:40:24,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:40:24,307 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:40:24,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 02:40:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:24,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-03 02:40:24,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:25,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:28,233 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:40:28,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586524077] [2022-11-03 02:40:28,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586524077] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:28,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [269190540] [2022-11-03 02:40:28,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:28,233 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:28,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:40:28,234 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:40:28,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-03 02:40:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:28,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 02:40:28,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:30,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:32,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [269190540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:32,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426939224] [2022-11-03 02:40:32,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:32,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:32,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:32,656 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:32,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-03 02:40:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:32,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-03 02:40:32,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:33,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:34,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426939224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:34,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:40:34,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21, 21, 22, 22] total 67 [2022-11-03 02:40:34,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269447994] [2022-11-03 02:40:34,096 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:40:34,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-03 02:40:34,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:40:34,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-03 02:40:34,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=4192, Unknown=0, NotChecked=0, Total=4422 [2022-11-03 02:40:34,098 INFO L87 Difference]: Start difference. First operand 402 states and 504 transitions. Second operand has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 67 states have internal predecessors, (141), 0 states have call successors, (0), 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 02:40:36,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:36,024 INFO L93 Difference]: Finished difference Result 645 states and 807 transitions. [2022-11-03 02:40:36,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-03 02:40:36,025 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 67 states have internal predecessors, (141), 0 states have call successors, (0), 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 44 [2022-11-03 02:40:36,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:36,026 INFO L225 Difference]: With dead ends: 645 [2022-11-03 02:40:36,026 INFO L226 Difference]: Without dead ends: 643 [2022-11-03 02:40:36,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=499, Invalid=6811, Unknown=0, NotChecked=0, Total=7310 [2022-11-03 02:40:36,028 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 174 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 439 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:36,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 1208 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 242 Invalid, 0 Unknown, 439 Unchecked, 0.4s Time] [2022-11-03 02:40:36,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-11-03 02:40:36,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 404. [2022-11-03 02:40:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.2580645161290323) internal successors, (507), 403 states have internal predecessors, (507), 0 states have call successors, (0), 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 02:40:36,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 507 transitions. [2022-11-03 02:40:36,100 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 507 transitions. Word has length 44 [2022-11-03 02:40:36,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:36,100 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 507 transitions. [2022-11-03 02:40:36,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 67 states have internal predecessors, (141), 0 states have call successors, (0), 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 02:40:36,100 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 507 transitions. [2022-11-03 02:40:36,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:40:36,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:36,101 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:36,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:36,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:36,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:36,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:40:36,703 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:36,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:36,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1585372429, now seen corresponding path program 2 times [2022-11-03 02:40:36,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:40:36,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904138115] [2022-11-03 02:40:36,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:40:36,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:40:36,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:40:36,705 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:40:36,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-03 02:40:36,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:40:36,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:40:36,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-03 02:40:36,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:37,665 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:37,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:40,595 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:40,595 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:40:40,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904138115] [2022-11-03 02:40:40,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904138115] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:40,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [521648130] [2022-11-03 02:40:40,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:40:40,596 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:40,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:40:40,597 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:40:40,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-03 02:40:41,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:40:41,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:40:41,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 02:40:41,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:42,775 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:42,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:45,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [521648130] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:45,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549106124] [2022-11-03 02:40:45,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:40:45,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:45,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:45,053 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:45,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-03 02:40:45,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:40:45,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:40:45,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-03 02:40:45,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:40:48,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:01,480 WARN L234 SmtUtils]: Spent 58.42s on a formula simplification. DAG size of input: 807 DAG size of output: 660 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:47:13,166 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:47:13,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549106124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:13,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:47:13,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21, 21, 7, 7] total 75 [2022-11-03 02:47:13,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426598332] [2022-11-03 02:47:13,167 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:47:13,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-03 02:47:13,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:47:13,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-03 02:47:13,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=5304, Unknown=0, NotChecked=0, Total=5550 [2022-11-03 02:47:13,170 INFO L87 Difference]: Start difference. First operand 404 states and 507 transitions. Second operand has 75 states, 75 states have (on average 2.56) internal successors, (192), 75 states have internal predecessors, (192), 0 states have call successors, (0), 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 02:47:22,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:22,283 INFO L93 Difference]: Finished difference Result 640 states and 801 transitions. [2022-11-03 02:47:22,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-03 02:47:22,284 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.56) internal successors, (192), 75 states have internal predecessors, (192), 0 states have call successors, (0), 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 44 [2022-11-03 02:47:22,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:22,285 INFO L225 Difference]: With dead ends: 640 [2022-11-03 02:47:22,286 INFO L226 Difference]: Without dead ends: 550 [2022-11-03 02:47:22,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2805 ImplicationChecksByTransitivity, 79.7s TimeCoverageRelationStatistics Valid=745, Invalid=11687, Unknown=0, NotChecked=0, Total=12432 [2022-11-03 02:47:22,288 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 133 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 482 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:22,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 1212 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 288 Invalid, 0 Unknown, 482 Unchecked, 0.6s Time] [2022-11-03 02:47:22,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-11-03 02:47:22,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 400. [2022-11-03 02:47:22,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.2531328320802004) internal successors, (500), 399 states have internal predecessors, (500), 0 states have call successors, (0), 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 02:47:22,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 500 transitions. [2022-11-03 02:47:22,379 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 500 transitions. Word has length 44 [2022-11-03 02:47:22,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:22,380 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 500 transitions. [2022-11-03 02:47:22,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.56) internal successors, (192), 75 states have internal predecessors, (192), 0 states have call successors, (0), 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 02:47:22,380 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 500 transitions. [2022-11-03 02:47:22,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:47:22,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:22,381 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:22,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:22,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:22,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:22,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:47:22,996 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:22,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:22,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1462810633, now seen corresponding path program 1 times [2022-11-03 02:47:22,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:47:22,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250730281] [2022-11-03 02:47:22,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:22,998 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:47:22,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:47:23,000 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:47:23,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 02:47:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:23,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:47:23,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:47:24,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:29,172 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:47:29,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250730281] [2022-11-03 02:47:29,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250730281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:29,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [471731979] [2022-11-03 02:47:29,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:29,173 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:47:29,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:47:29,174 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:47:29,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-03 02:47:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:29,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 02:47:29,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:47:31,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:34,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [471731979] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:34,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148938892] [2022-11-03 02:47:34,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:34,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:34,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:34,363 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:34,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-03 02:47:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:34,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 02:47:34,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:47:35,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:36,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148938892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:36,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:47:36,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 20, 21, 21, 22] total 65 [2022-11-03 02:47:36,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574596459] [2022-11-03 02:47:36,155 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:47:36,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-03 02:47:36,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:47:36,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-03 02:47:36,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=3931, Unknown=0, NotChecked=0, Total=4160 [2022-11-03 02:47:36,158 INFO L87 Difference]: Start difference. First operand 400 states and 500 transitions. Second operand has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 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 02:47:41,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:41,824 INFO L93 Difference]: Finished difference Result 567 states and 703 transitions. [2022-11-03 02:47:41,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-03 02:47:41,825 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 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 44 [2022-11-03 02:47:41,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:41,828 INFO L225 Difference]: With dead ends: 567 [2022-11-03 02:47:41,828 INFO L226 Difference]: Without dead ends: 565 [2022-11-03 02:47:41,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 194 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2085 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=708, Invalid=8222, Unknown=0, NotChecked=0, Total=8930 [2022-11-03 02:47:41,830 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 188 mSDsluCounter, 1285 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 558 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:41,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 1326 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 271 Invalid, 0 Unknown, 558 Unchecked, 0.5s Time] [2022-11-03 02:47:41,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-11-03 02:47:41,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 424. [2022-11-03 02:47:41,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 1.2529550827423168) internal successors, (530), 423 states have internal predecessors, (530), 0 states have call successors, (0), 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 02:47:41,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 530 transitions. [2022-11-03 02:47:41,916 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 530 transitions. Word has length 44 [2022-11-03 02:47:41,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:41,917 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 530 transitions. [2022-11-03 02:47:41,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 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 02:47:41,917 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 530 transitions. [2022-11-03 02:47:41,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:47:41,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:41,919 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:41,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:42,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:42,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:42,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:42,536 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:42,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:42,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1819756917, now seen corresponding path program 3 times [2022-11-03 02:47:42,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:47:42,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874950756] [2022-11-03 02:47:42,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:47:42,538 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:47:42,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:47:42,539 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:47:42,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 02:47:42,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 02:47:42,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:42,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-03 02:47:42,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:43,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:46,666 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:47:46,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874950756] [2022-11-03 02:47:46,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874950756] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:46,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1751797566] [2022-11-03 02:47:46,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:47:46,667 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:47:46,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:47:46,668 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:47:46,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-03 02:47:47,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 02:47:47,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:47,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-03 02:47:47,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:47,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:48,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1751797566] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:48,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88496567] [2022-11-03 02:47:48,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:47:48,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:48,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:48,398 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:48,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-03 02:47:48,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 02:47:48,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:48,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-03 02:47:48,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:49,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:49,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88496567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:49,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:47:49,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 19, 18] total 35 [2022-11-03 02:47:49,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023577951] [2022-11-03 02:47:49,887 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:47:49,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 02:47:49,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:47:49,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 02:47:49,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1093, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:47:49,888 INFO L87 Difference]: Start difference. First operand 424 states and 530 transitions. Second operand has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 35 states have internal predecessors, (88), 0 states have call successors, (0), 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 02:47:56,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:56,495 INFO L93 Difference]: Finished difference Result 661 states and 819 transitions. [2022-11-03 02:47:56,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-03 02:47:56,496 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 35 states have internal predecessors, (88), 0 states have call successors, (0), 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 44 [2022-11-03 02:47:56,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:56,499 INFO L225 Difference]: With dead ends: 661 [2022-11-03 02:47:56,499 INFO L226 Difference]: Without dead ends: 659 [2022-11-03 02:47:56,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=717, Invalid=4253, Unknown=0, NotChecked=0, Total=4970 [2022-11-03 02:47:56,506 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 342 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 495 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:56,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 1019 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 184 Invalid, 0 Unknown, 495 Unchecked, 0.4s Time] [2022-11-03 02:47:56,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-11-03 02:47:56,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 469. [2022-11-03 02:47:56,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.2585470085470085) internal successors, (589), 468 states have internal predecessors, (589), 0 states have call successors, (0), 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 02:47:56,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 589 transitions. [2022-11-03 02:47:56,649 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 589 transitions. Word has length 44 [2022-11-03 02:47:56,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:56,649 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 589 transitions. [2022-11-03 02:47:56,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 35 states have internal predecessors, (88), 0 states have call successors, (0), 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 02:47:56,650 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 589 transitions. [2022-11-03 02:47:56,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:47:56,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:56,651 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:56,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:56,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:57,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:57,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:47:57,264 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:57,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:57,265 INFO L85 PathProgramCache]: Analyzing trace with hash 2038611635, now seen corresponding path program 2 times [2022-11-03 02:47:57,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:47:57,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496721471] [2022-11-03 02:47:57,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:47:57,266 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:47:57,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:47:57,267 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:47:57,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-03 02:47:57,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:47:57,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:57,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:47:57,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:58,543 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:58,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:01,951 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:01,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [496721471] [2022-11-03 02:48:01,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [496721471] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:01,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [473860217] [2022-11-03 02:48:01,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:48:01,951 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:01,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:01,952 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:01,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-11-03 02:48:02,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:48:02,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:02,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 02:48:02,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:48:04,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:48:05,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [473860217] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:05,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265707490] [2022-11-03 02:48:05,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:48:05,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:05,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:05,734 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:05,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-03 02:48:05,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:48:05,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:05,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 02:48:05,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:07,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:48:08,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265707490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:08,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:48:08,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 18, 18, 22, 18] total 66 [2022-11-03 02:48:08,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332762007] [2022-11-03 02:48:08,123 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:48:08,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-03 02:48:08,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:08,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-03 02:48:08,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=4012, Unknown=0, NotChecked=0, Total=4290 [2022-11-03 02:48:08,125 INFO L87 Difference]: Start difference. First operand 469 states and 589 transitions. Second operand has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 66 states have internal predecessors, (145), 0 states have call successors, (0), 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 02:48:15,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:15,027 INFO L93 Difference]: Finished difference Result 649 states and 807 transitions. [2022-11-03 02:48:15,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-03 02:48:15,028 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 66 states have internal predecessors, (145), 0 states have call successors, (0), 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 44 [2022-11-03 02:48:15,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:15,029 INFO L225 Difference]: With dead ends: 649 [2022-11-03 02:48:15,029 INFO L226 Difference]: Without dead ends: 647 [2022-11-03 02:48:15,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 189 SyntacticMatches, 6 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3505 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=970, Invalid=11462, Unknown=0, NotChecked=0, Total=12432 [2022-11-03 02:48:15,031 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 192 mSDsluCounter, 1971 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 2058 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 677 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:15,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 2058 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 412 Invalid, 0 Unknown, 677 Unchecked, 0.7s Time] [2022-11-03 02:48:15,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-11-03 02:48:15,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 484. [2022-11-03 02:48:15,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 1.2608695652173914) internal successors, (609), 483 states have internal predecessors, (609), 0 states have call successors, (0), 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 02:48:15,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 609 transitions. [2022-11-03 02:48:15,114 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 609 transitions. Word has length 44 [2022-11-03 02:48:15,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:15,114 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 609 transitions. [2022-11-03 02:48:15,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 66 states have internal predecessors, (145), 0 states have call successors, (0), 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 02:48:15,115 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 609 transitions. [2022-11-03 02:48:15,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:48:15,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:15,116 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:15,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:15,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:15,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:15,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:48:15,740 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:15,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:15,741 INFO L85 PathProgramCache]: Analyzing trace with hash -867399563, now seen corresponding path program 1 times [2022-11-03 02:48:15,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:15,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287190965] [2022-11-03 02:48:15,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:15,742 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:15,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:15,743 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:15,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-03 02:48:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:16,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:48:16,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:17,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:20,501 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:20,501 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:20,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287190965] [2022-11-03 02:48:20,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287190965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:20,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1006023436] [2022-11-03 02:48:20,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:20,503 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:20,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:20,504 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:20,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-11-03 02:48:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:21,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:48:21,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:21,541 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:21,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:22,218 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:22,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1006023436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:22,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77024960] [2022-11-03 02:48:22,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:22,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:22,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:22,221 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:22,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-03 02:48:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:22,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 02:48:22,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:22,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:23,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77024960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:23,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:48:23,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20, 20, 21, 21] total 40 [2022-11-03 02:48:23,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100697783] [2022-11-03 02:48:23,898 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:48:23,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:48:23,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:23,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:48:23,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1445, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:48:23,900 INFO L87 Difference]: Start difference. First operand 484 states and 609 transitions. Second operand has 40 states, 40 states have (on average 2.25) internal successors, (90), 40 states have internal predecessors, (90), 0 states have call successors, (0), 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 02:48:27,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:27,622 INFO L93 Difference]: Finished difference Result 587 states and 733 transitions. [2022-11-03 02:48:27,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-03 02:48:27,622 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.25) internal successors, (90), 40 states have internal predecessors, (90), 0 states have call successors, (0), 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 44 [2022-11-03 02:48:27,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:27,624 INFO L225 Difference]: With dead ends: 587 [2022-11-03 02:48:27,624 INFO L226 Difference]: Without dead ends: 585 [2022-11-03 02:48:27,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=316, Invalid=3466, Unknown=0, NotChecked=0, Total=3782 [2022-11-03 02:48:27,625 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 191 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 450 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:27,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 855 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 92 Invalid, 0 Unknown, 450 Unchecked, 0.2s Time] [2022-11-03 02:48:27,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-11-03 02:48:27,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 490. [2022-11-03 02:48:27,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.261758691206544) internal successors, (617), 489 states have internal predecessors, (617), 0 states have call successors, (0), 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 02:48:27,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 617 transitions. [2022-11-03 02:48:27,724 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 617 transitions. Word has length 44 [2022-11-03 02:48:27,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:27,724 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 617 transitions. [2022-11-03 02:48:27,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.25) internal successors, (90), 40 states have internal predecessors, (90), 0 states have call successors, (0), 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 02:48:27,725 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 617 transitions. [2022-11-03 02:48:27,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:48:27,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:27,726 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:27,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:27,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:28,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:28,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:28,328 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:28,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:28,328 INFO L85 PathProgramCache]: Analyzing trace with hash -888405771, now seen corresponding path program 1 times [2022-11-03 02:48:28,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:28,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820374969] [2022-11-03 02:48:28,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:28,329 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:28,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:28,330 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:28,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 02:48:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:28,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:48:28,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:29,640 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:29,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:33,169 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:33,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820374969] [2022-11-03 02:48:33,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820374969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:33,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [489087596] [2022-11-03 02:48:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:33,170 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:33,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:33,171 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:33,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-11-03 02:48:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:33,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:48:33,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:34,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:34,820 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:34,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [489087596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:34,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791273445] [2022-11-03 02:48:34,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:34,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:34,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:34,822 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:34,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-03 02:48:35,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:35,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 02:48:35,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:35,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:36,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791273445] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:36,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:48:36,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20, 20, 21, 21] total 40 [2022-11-03 02:48:36,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367247744] [2022-11-03 02:48:36,451 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:48:36,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:48:36,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:36,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:48:36,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1445, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:48:36,453 INFO L87 Difference]: Start difference. First operand 490 states and 617 transitions. Second operand has 40 states, 40 states have (on average 2.25) internal successors, (90), 40 states have internal predecessors, (90), 0 states have call successors, (0), 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 02:48:41,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:41,016 INFO L93 Difference]: Finished difference Result 588 states and 732 transitions. [2022-11-03 02:48:41,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-03 02:48:41,017 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.25) internal successors, (90), 40 states have internal predecessors, (90), 0 states have call successors, (0), 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 44 [2022-11-03 02:48:41,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:41,020 INFO L225 Difference]: With dead ends: 588 [2022-11-03 02:48:41,020 INFO L226 Difference]: Without dead ends: 586 [2022-11-03 02:48:41,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 218 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=323, Invalid=3967, Unknown=0, NotChecked=0, Total=4290 [2022-11-03 02:48:41,022 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 87 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 357 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:41,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 942 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 357 Unchecked, 0.2s Time] [2022-11-03 02:48:41,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-11-03 02:48:41,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 477. [2022-11-03 02:48:41,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.2584033613445378) internal successors, (599), 476 states have internal predecessors, (599), 0 states have call successors, (0), 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 02:48:41,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 599 transitions. [2022-11-03 02:48:41,105 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 599 transitions. Word has length 44 [2022-11-03 02:48:41,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:41,106 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 599 transitions. [2022-11-03 02:48:41,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.25) internal successors, (90), 40 states have internal predecessors, (90), 0 states have call successors, (0), 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 02:48:41,106 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 599 transitions. [2022-11-03 02:48:41,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 02:48:41,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:41,108 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:41,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:41,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:41,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (67)] Ended with exit code 0 [2022-11-03 02:48:41,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:41,724 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:41,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:41,725 INFO L85 PathProgramCache]: Analyzing trace with hash 514483527, now seen corresponding path program 2 times [2022-11-03 02:48:41,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:41,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826878060] [2022-11-03 02:48:41,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:48:41,726 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:41,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:41,727 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:41,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 02:48:42,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:48:42,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:42,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:48:42,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:48:42,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:48:45,855 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:45,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826878060] [2022-11-03 02:48:45,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826878060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:45,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [74179891] [2022-11-03 02:48:45,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:48:45,855 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:45,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:45,856 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:45,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-03 02:48:46,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:48:46,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:46,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:48:46,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:48:46,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:48:47,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [74179891] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:47,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61258253] [2022-11-03 02:48:47,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:48:47,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:47,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:47,745 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:47,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-03 02:48:48,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:48:48,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:48,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 02:48:48,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 5 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:48:49,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:51,043 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:48:51,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61258253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:51,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:48:51,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 15, 22, 24, 17] total 55 [2022-11-03 02:48:51,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143780296] [2022-11-03 02:48:51,044 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:48:51,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-03 02:48:51,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:51,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-03 02:48:51,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2757, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 02:48:51,047 INFO L87 Difference]: Start difference. First operand 477 states and 599 transitions. Second operand has 55 states, 55 states have (on average 2.8363636363636364) internal successors, (156), 55 states have internal predecessors, (156), 0 states have call successors, (0), 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 02:48:54,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:54,905 INFO L93 Difference]: Finished difference Result 839 states and 1038 transitions. [2022-11-03 02:48:54,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-03 02:48:54,906 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.8363636363636364) internal successors, (156), 55 states have internal predecessors, (156), 0 states have call successors, (0), 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 57 [2022-11-03 02:48:54,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:54,909 INFO L225 Difference]: With dead ends: 839 [2022-11-03 02:48:54,909 INFO L226 Difference]: Without dead ends: 837 [2022-11-03 02:48:54,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 283 SyntacticMatches, 5 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2955 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1695, Invalid=8607, Unknown=0, NotChecked=0, Total=10302 [2022-11-03 02:48:54,910 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 732 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 466 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:54,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [732 Valid, 617 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 313 Invalid, 0 Unknown, 466 Unchecked, 0.7s Time] [2022-11-03 02:48:54,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-11-03 02:48:55,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 374. [2022-11-03 02:48:55,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 1.2520107238605898) internal successors, (467), 373 states have internal predecessors, (467), 0 states have call successors, (0), 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 02:48:55,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 467 transitions. [2022-11-03 02:48:55,028 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 467 transitions. Word has length 57 [2022-11-03 02:48:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:55,028 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 467 transitions. [2022-11-03 02:48:55,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.8363636363636364) internal successors, (156), 55 states have internal predecessors, (156), 0 states have call successors, (0), 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 02:48:55,028 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 467 transitions. [2022-11-03 02:48:55,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 02:48:55,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:55,030 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:55,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:55,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:55,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:55,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:55,637 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:55,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:55,638 INFO L85 PathProgramCache]: Analyzing trace with hash 648497033, now seen corresponding path program 3 times [2022-11-03 02:48:55,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:55,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [405892610] [2022-11-03 02:48:55,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:48:55,639 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:55,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:55,640 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:55,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711b5c4c-83a3-47f0-b289-b3e95db388cc/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-03 02:48:55,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:48:55,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:55,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 02:48:55,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 48 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:48:57,122 INFO L328 TraceCheckSpWp]: Computing backward predicates...