./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.diagonal_v.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_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/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_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.diagonal_v.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/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_983416e2-0bdc-4013-8bdd-08500eed6c50/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 4f767659aef273937b209b166fb1e0efe89714175079fa1bd2cb01c19aa1ec81 --- 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 02:10:41,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:10:41,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:10:41,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:10:41,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:10:41,657 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:10:41,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:10:41,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:10:41,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:10:41,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:10:41,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:10:41,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:10:41,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:10:41,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:10:41,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:10:41,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:10:41,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:10:41,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:10:41,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:10:41,705 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:10:41,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:10:41,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:10:41,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:10:41,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:10:41,724 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:10:41,729 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:10:41,730 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:10:41,731 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:10:41,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:10:41,734 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:10:41,734 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:10:41,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:10:41,740 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:10:41,742 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:10:41,743 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:10:41,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:10:41,744 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:10:41,745 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:10:41,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:10:41,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:10:41,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:10:41,750 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:10:41,801 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:10:41,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:10:41,802 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:10:41,802 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:10:41,803 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:10:41,803 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:10:41,803 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:10:41,804 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:10:41,804 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:10:41,804 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:10:41,804 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:10:41,805 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:10:41,805 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:10:41,805 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:10:41,805 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:10:41,805 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:10:41,806 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:10:41,806 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:10:41,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:10:41,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:10:41,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:10:41,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:10:41,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:10:41,808 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:10:41,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:10:41,808 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:10:41,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:10:41,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:10:41,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:10:41,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:10:41,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:10:41,810 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:10:41,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:10:41,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:10:41,811 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:10:41,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:10:41,811 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:10:41,811 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:10:41,811 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_983416e2-0bdc-4013-8bdd-08500eed6c50/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f767659aef273937b209b166fb1e0efe89714175079fa1bd2cb01c19aa1ec81 [2022-11-03 02:10:42,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:10:42,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:10:42,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:10:42,200 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:10:42,201 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:10:42,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.diagonal_v.c [2022-11-03 02:10:42,299 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/data/58989709f/30a6bc5cea6f4f77bff74cb558ff45bd/FLAG4fce0e3c7 [2022-11-03 02:10:42,818 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:10:42,818 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.diagonal_v.c [2022-11-03 02:10:42,827 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/data/58989709f/30a6bc5cea6f4f77bff74cb558ff45bd/FLAG4fce0e3c7 [2022-11-03 02:10:43,182 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/data/58989709f/30a6bc5cea6f4f77bff74cb558ff45bd [2022-11-03 02:10:43,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:10:43,188 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:10:43,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:10:43,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:10:43,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:10:43,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:10:43" (1/1) ... [2022-11-03 02:10:43,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23117fee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:43, skipping insertion in model container [2022-11-03 02:10:43,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:10:43" (1/1) ... [2022-11-03 02:10:43,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:10:43,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:10:43,529 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_983416e2-0bdc-4013-8bdd-08500eed6c50/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.diagonal_v.c[1107,1120] [2022-11-03 02:10:43,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:10:43,659 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:10:43,678 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_983416e2-0bdc-4013-8bdd-08500eed6c50/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.diagonal_v.c[1107,1120] [2022-11-03 02:10:43,746 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:10:43,763 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:10:43,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:43 WrapperNode [2022-11-03 02:10:43,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:10:43,765 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:10:43,765 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:10:43,765 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:10:43,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:43" (1/1) ... [2022-11-03 02:10:43,798 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:43" (1/1) ... [2022-11-03 02:10:43,861 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 165 [2022-11-03 02:10:43,862 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:10:43,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:10:43,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:10:43,864 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:10:43,874 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:43" (1/1) ... [2022-11-03 02:10:43,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:43" (1/1) ... [2022-11-03 02:10:43,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:43" (1/1) ... [2022-11-03 02:10:43,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:43" (1/1) ... [2022-11-03 02:10:43,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:43" (1/1) ... [2022-11-03 02:10:43,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:43" (1/1) ... [2022-11-03 02:10:43,927 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:43" (1/1) ... [2022-11-03 02:10:43,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:43" (1/1) ... [2022-11-03 02:10:43,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:10:43,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:10:43,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:10:43,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:10:43,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:43" (1/1) ... [2022-11-03 02:10:43,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:10:43,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:10:43,987 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:10:44,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:10:44,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:10:44,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:10:44,179 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:10:44,181 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:10:44,772 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:10:45,063 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:10:45,063 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:10:45,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:10:45 BoogieIcfgContainer [2022-11-03 02:10:45,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:10:45,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:10:45,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:10:45,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:10:45,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:10:43" (1/3) ... [2022-11-03 02:10:45,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@880a97b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:10:45, skipping insertion in model container [2022-11-03 02:10:45,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:43" (2/3) ... [2022-11-03 02:10:45,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@880a97b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:10:45, skipping insertion in model container [2022-11-03 02:10:45,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:10:45" (3/3) ... [2022-11-03 02:10:45,081 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.diagonal_v.c [2022-11-03 02:10:45,105 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:10:45,106 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:10:45,175 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:10:45,195 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;@1a43c30d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:10:45,196 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:10:45,201 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 02:10:45,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:10:45,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:45,214 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:10:45,215 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:45,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:45,224 INFO L85 PathProgramCache]: Analyzing trace with hash 2840173, now seen corresponding path program 1 times [2022-11-03 02:10:45,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:10:45,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955301169] [2022-11-03 02:10:45,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:45,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:10:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:10:45,507 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:10:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:10:45,613 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:10:45,616 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:10:45,618 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:10:45,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:10:45,627 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:10:45,632 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:10:45,662 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:10:45,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:10:45 BoogieIcfgContainer [2022-11-03 02:10:45,669 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:10:45,670 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:10:45,670 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:10:45,670 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:10:45,671 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:10:45" (3/4) ... [2022-11-03 02:10:45,674 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:10:45,674 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:10:45,675 INFO L158 Benchmark]: Toolchain (without parser) took 2487.24ms. Allocated memory is still 123.7MB. Free memory was 87.7MB in the beginning and 61.7MB in the end (delta: 26.0MB). Peak memory consumption was 26.0MB. Max. memory is 16.1GB. [2022-11-03 02:10:45,676 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 123.7MB. Free memory is still 104.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:10:45,677 INFO L158 Benchmark]: CACSL2BoogieTranslator took 573.91ms. Allocated memory is still 123.7MB. Free memory was 87.5MB in the beginning and 96.3MB in the end (delta: -8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:10:45,678 INFO L158 Benchmark]: Boogie Procedure Inliner took 97.22ms. Allocated memory is still 123.7MB. Free memory was 96.3MB in the beginning and 93.1MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:10:45,678 INFO L158 Benchmark]: Boogie Preprocessor took 83.69ms. Allocated memory is still 123.7MB. Free memory was 93.1MB in the beginning and 91.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:10:45,679 INFO L158 Benchmark]: RCFGBuilder took 1119.12ms. Allocated memory is still 123.7MB. Free memory was 91.0MB in the beginning and 81.4MB in the end (delta: 9.6MB). Peak memory consumption was 45.5MB. Max. memory is 16.1GB. [2022-11-03 02:10:45,680 INFO L158 Benchmark]: TraceAbstraction took 600.38ms. Allocated memory is still 123.7MB. Free memory was 80.6MB in the beginning and 62.3MB in the end (delta: 18.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-03 02:10:45,681 INFO L158 Benchmark]: Witness Printer took 4.41ms. Allocated memory is still 123.7MB. Free memory was 62.3MB in the beginning and 61.7MB in the end (delta: 618.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:10:45,685 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 123.7MB. Free memory is still 104.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 573.91ms. Allocated memory is still 123.7MB. Free memory was 87.5MB in the beginning and 96.3MB in the end (delta: -8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 97.22ms. Allocated memory is still 123.7MB. Free memory was 96.3MB in the beginning and 93.1MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 83.69ms. Allocated memory is still 123.7MB. Free memory was 93.1MB in the beginning and 91.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1119.12ms. Allocated memory is still 123.7MB. Free memory was 91.0MB in the beginning and 81.4MB in the end (delta: 9.6MB). Peak memory consumption was 45.5MB. Max. memory is 16.1GB. * TraceAbstraction took 600.38ms. Allocated memory is still 123.7MB. Free memory was 80.6MB in the beginning and 62.3MB in the end (delta: 18.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Witness Printer took 4.41ms. Allocated memory is still 123.7MB. Free memory was 62.3MB in the beginning and 61.7MB in the end (delta: 618.8kB). Peak memory consumption was 2.1MB. 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 60, overapproximation of bitwiseAnd at line 65. 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_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 4); [L29] const SORT_4 msb_SORT_4 = (SORT_4)1 << (4 - 1); [L31] const SORT_28 mask_SORT_28 = (SORT_28)-1 >> (sizeof(SORT_28) * 8 - 32); [L32] const SORT_28 msb_SORT_28 = (SORT_28)1 << (32 - 1); [L34] const SORT_4 var_5 = 1; [L35] const SORT_4 var_8 = 0; [L36] const SORT_1 var_15 = 1; [L37] const SORT_4 var_22 = 15; [L38] const SORT_28 var_30 = 1; [L40] SORT_1 input_2; [L41] SORT_1 input_3; [L43] SORT_4 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_4; [L44] SORT_4 state_9 = __VERIFIER_nondet_uchar() & mask_SORT_4; [L46] SORT_4 init_7_arg_1 = var_5; [L47] state_6 = init_7_arg_1 [L48] SORT_4 init_10_arg_1 = var_8; [L49] state_9 = init_10_arg_1 VAL [init_10_arg_1=0, init_7_arg_1=1, mask_SORT_1=1, mask_SORT_28=4294967295, mask_SORT_4=15, msb_SORT_1=1, msb_SORT_28=2147483648, msb_SORT_4=8, state_6=1, state_9=0, var_15=1, var_22=15, var_30=1, var_5=1, var_8=0] [L52] input_2 = __VERIFIER_nondet_uchar() [L53] input_3 = __VERIFIER_nondet_uchar() [L56] SORT_4 var_11_arg_0 = state_6; [L57] SORT_4 var_11_arg_1 = state_9; [L58] SORT_1 var_11 = var_11_arg_0 < var_11_arg_1; [L59] SORT_1 var_12_arg_0 = var_11; [L60] SORT_1 var_12 = ~var_12_arg_0; [L61] SORT_1 var_16_arg_0 = var_12; [L62] SORT_1 var_16 = ~var_16_arg_0; [L63] SORT_1 var_17_arg_0 = var_15; [L64] SORT_1 var_17_arg_1 = var_16; [L65] SORT_1 var_17 = var_17_arg_0 & var_17_arg_1; [L66] var_17 = var_17 & mask_SORT_1 [L67] SORT_1 bad_18_arg_0 = var_17; [L68] CALL __VERIFIER_assert(!(bad_18_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:10:45,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/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_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.diagonal_v.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/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_983416e2-0bdc-4013-8bdd-08500eed6c50/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 4f767659aef273937b209b166fb1e0efe89714175079fa1bd2cb01c19aa1ec81 --- 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 02:10:48,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:10:48,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:10:48,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:10:48,461 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:10:48,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:10:48,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:10:48,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:10:48,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:10:48,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:10:48,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:10:48,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:10:48,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:10:48,494 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:10:48,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:10:48,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:10:48,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:10:48,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:10:48,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:10:48,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:10:48,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:10:48,510 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:10:48,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:10:48,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:10:48,517 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:10:48,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:10:48,518 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:10:48,519 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:10:48,520 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:10:48,521 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:10:48,522 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:10:48,523 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:10:48,524 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:10:48,534 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:10:48,536 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:10:48,537 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:10:48,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:10:48,538 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:10:48,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:10:48,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:10:48,542 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:10:48,543 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:10:48,590 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:10:48,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:10:48,595 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:10:48,595 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:10:48,597 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:10:48,597 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:10:48,597 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:10:48,598 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:10:48,598 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:10:48,598 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:10:48,599 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:10:48,600 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:10:48,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:10:48,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:10:48,603 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:10:48,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:10:48,603 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:10:48,603 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:10:48,604 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:10:48,604 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:10:48,604 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:10:48,604 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:10:48,605 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:10:48,605 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:10:48,605 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:10:48,605 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:10:48,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:10:48,606 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:10:48,606 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:10:48,606 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:10:48,606 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:10:48,607 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:10:48,607 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:10:48,607 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:10:48,608 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:10:48,608 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_983416e2-0bdc-4013-8bdd-08500eed6c50/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f767659aef273937b209b166fb1e0efe89714175079fa1bd2cb01c19aa1ec81 [2022-11-03 02:10:49,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:10:49,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:10:49,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:10:49,108 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:10:49,109 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:10:49,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.diagonal_v.c [2022-11-03 02:10:49,204 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/data/2b9cd7b6b/c520abec0640447882f2d583406b68f4/FLAG5d5e9d4ab [2022-11-03 02:10:49,886 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:10:49,887 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.diagonal_v.c [2022-11-03 02:10:49,898 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/data/2b9cd7b6b/c520abec0640447882f2d583406b68f4/FLAG5d5e9d4ab [2022-11-03 02:10:50,196 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/data/2b9cd7b6b/c520abec0640447882f2d583406b68f4 [2022-11-03 02:10:50,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:10:50,201 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:10:50,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:10:50,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:10:50,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:10:50,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:10:50" (1/1) ... [2022-11-03 02:10:50,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@525259ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:50, skipping insertion in model container [2022-11-03 02:10:50,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:10:50" (1/1) ... [2022-11-03 02:10:50,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:10:50,260 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:10:50,477 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_983416e2-0bdc-4013-8bdd-08500eed6c50/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.diagonal_v.c[1107,1120] [2022-11-03 02:10:50,619 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:10:50,623 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:10:50,641 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_983416e2-0bdc-4013-8bdd-08500eed6c50/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.diagonal_v.c[1107,1120] [2022-11-03 02:10:50,714 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:10:50,729 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:10:50,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:50 WrapperNode [2022-11-03 02:10:50,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:10:50,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:10:50,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:10:50,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:10:50,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:50" (1/1) ... [2022-11-03 02:10:50,760 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:50" (1/1) ... [2022-11-03 02:10:50,806 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 165 [2022-11-03 02:10:50,807 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:10:50,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:10:50,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:10:50,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:10:50,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:50" (1/1) ... [2022-11-03 02:10:50,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:50" (1/1) ... [2022-11-03 02:10:50,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:50" (1/1) ... [2022-11-03 02:10:50,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:50" (1/1) ... [2022-11-03 02:10:50,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:50" (1/1) ... [2022-11-03 02:10:50,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:50" (1/1) ... [2022-11-03 02:10:50,868 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:50" (1/1) ... [2022-11-03 02:10:50,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:50" (1/1) ... [2022-11-03 02:10:50,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:10:50,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:10:50,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:10:50,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:10:50,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:50" (1/1) ... [2022-11-03 02:10:50,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:10:50,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:10:50,924 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:10:50,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:10:50,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:10:50,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:10:51,150 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:10:51,153 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:10:51,597 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:10:51,614 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:10:51,614 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:10:51,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:10:51 BoogieIcfgContainer [2022-11-03 02:10:51,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:10:51,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:10:51,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:10:51,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:10:51,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:10:50" (1/3) ... [2022-11-03 02:10:51,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bed6cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:10:51, skipping insertion in model container [2022-11-03 02:10:51,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:50" (2/3) ... [2022-11-03 02:10:51,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bed6cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:10:51, skipping insertion in model container [2022-11-03 02:10:51,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:10:51" (3/3) ... [2022-11-03 02:10:51,627 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.diagonal_v.c [2022-11-03 02:10:51,653 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:10:51,653 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:10:51,751 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:10:51,764 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;@52510be1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:10:51,765 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:10:51,770 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 02:10:51,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:10:51,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:51,779 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:10:51,780 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:51,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:51,787 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 02:10:51,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:51,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560678399] [2022-11-03 02:10:51,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:51,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:51,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:51,808 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:51,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:10:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:51,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:10:51,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:52,257 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 02:10:52,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:52,258 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:52,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [560678399] [2022-11-03 02:10:52,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [560678399] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:52,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:52,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:10:52,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566403595] [2022-11-03 02:10:52,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:52,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:10:52,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:52,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:10:52,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:10:52,336 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 02:10:52,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:52,459 INFO L93 Difference]: Finished difference Result 50 states and 75 transitions. [2022-11-03 02:10:52,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:10:52,464 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 02:10:52,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:52,479 INFO L225 Difference]: With dead ends: 50 [2022-11-03 02:10:52,480 INFO L226 Difference]: Without dead ends: 31 [2022-11-03 02:10:52,483 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 02:10:52,493 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 34 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:52,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:10:52,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-03 02:10:52,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2022-11-03 02:10:52,534 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 02:10:52,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-11-03 02:10:52,537 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 5 [2022-11-03 02:10:52,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:52,538 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-11-03 02:10:52,538 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 02:10:52,538 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-11-03 02:10:52,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:10:52,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:52,540 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 02:10:52,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:52,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:52,753 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:52,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:52,754 INFO L85 PathProgramCache]: Analyzing trace with hash -22920079, now seen corresponding path program 1 times [2022-11-03 02:10:52,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:52,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1953654583] [2022-11-03 02:10:52,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:52,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:52,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:52,759 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:52,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:10:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:52,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 02:10:52,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:53,590 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 02:10:53,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:54,497 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 02:10:54,498 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:54,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1953654583] [2022-11-03 02:10:54,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1953654583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:10:54,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2713044] [2022-11-03 02:10:54,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:54,504 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:10:54,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:10:54,507 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:10:54,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-03 02:10:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:54,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 02:10:54,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:55,077 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 02:10:55,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:55,325 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 02:10:55,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2713044] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:10:55,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719645973] [2022-11-03 02:10:55,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:55,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:10:55,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:10:55,329 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:10:55,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:10:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:55,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:10:55,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:55,923 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 02:10:55,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:56,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:56,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719645973] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:10:56,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:10:56,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 8, 8] total 30 [2022-11-03 02:10:56,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250631627] [2022-11-03 02:10:56,607 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:10:56,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 02:10:56,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:56,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 02:10:56,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:10:56,616 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 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 02:10:58,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:58,734 INFO L93 Difference]: Finished difference Result 93 states and 125 transitions. [2022-11-03 02:10:58,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 02:10:58,734 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 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 02:10:58,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:58,736 INFO L225 Difference]: With dead ends: 93 [2022-11-03 02:10:58,736 INFO L226 Difference]: Without dead ends: 91 [2022-11-03 02:10:58,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=684, Invalid=2072, Unknown=0, NotChecked=0, Total=2756 [2022-11-03 02:10:58,740 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 394 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:58,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 332 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 107 Invalid, 0 Unknown, 234 Unchecked, 0.3s Time] [2022-11-03 02:10:58,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-03 02:10:58,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 30. [2022-11-03 02:10:58,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 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 02:10:58,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2022-11-03 02:10:58,763 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 18 [2022-11-03 02:10:58,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:58,763 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2022-11-03 02:10:58,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 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 02:10:58,764 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2022-11-03 02:10:58,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:10:58,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:58,766 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 02:10:58,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:58,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:59,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:59,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:10:59,392 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:59,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:59,393 INFO L85 PathProgramCache]: Analyzing trace with hash -21073037, now seen corresponding path program 1 times [2022-11-03 02:10:59,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:59,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812666644] [2022-11-03 02:10:59,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:59,394 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:59,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:59,396 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:59,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:10:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:59,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:10:59,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:59,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:59,836 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:59,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812666644] [2022-11-03 02:10:59,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812666644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:59,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:59,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:10:59,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910373880] [2022-11-03 02:10:59,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:59,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:10:59,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:59,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:10:59,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:10:59,840 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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 02:10:59,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:59,880 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2022-11-03 02:10:59,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:10:59,884 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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 02:10:59,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:59,888 INFO L225 Difference]: With dead ends: 57 [2022-11-03 02:10:59,888 INFO L226 Difference]: Without dead ends: 42 [2022-11-03 02:10:59,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:10:59,893 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:59,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 74 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 28 Unchecked, 0.0s Time] [2022-11-03 02:10:59,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-03 02:10:59,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-03 02:10:59,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 states have internal predecessors, (56), 0 states have call successors, (0), 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 02:10:59,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 56 transitions. [2022-11-03 02:10:59,923 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 56 transitions. Word has length 18 [2022-11-03 02:10:59,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:59,924 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 56 transitions. [2022-11-03 02:10:59,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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 02:10:59,924 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 56 transitions. [2022-11-03 02:10:59,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:10:59,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:59,926 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 02:10:59,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:00,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:00,127 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:00,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:00,127 INFO L85 PathProgramCache]: Analyzing trace with hash 658985333, now seen corresponding path program 1 times [2022-11-03 02:11:00,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:00,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082678011] [2022-11-03 02:11:00,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:00,128 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:00,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:00,131 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:00,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:11:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:00,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 02:11:00,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:00,873 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 02:11:00,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:02,203 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 02:11:02,203 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:02,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082678011] [2022-11-03 02:11:02,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2082678011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:02,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [654804567] [2022-11-03 02:11:02,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:02,205 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:11:02,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:11:02,206 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:11:02,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-03 02:11:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:02,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 02:11:02,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:02,655 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 02:11:02,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:02,917 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 02:11:02,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [654804567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:02,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730394117] [2022-11-03 02:11:02,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:02,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:02,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:11:02,930 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:11:02,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:11:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:03,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 02:11:03,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:03,379 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 02:11:03,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:03,771 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 02:11:03,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730394117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:03,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:11:03,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 16, 16] total 30 [2022-11-03 02:11:03,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460333647] [2022-11-03 02:11:03,772 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:11:03,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 02:11:03,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:03,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 02:11:03,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:11:03,775 INFO L87 Difference]: Start difference. First operand 42 states and 56 transitions. Second operand has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 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 02:11:05,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:05,199 INFO L93 Difference]: Finished difference Result 95 states and 126 transitions. [2022-11-03 02:11:05,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 02:11:05,202 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 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 02:11:05,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:05,204 INFO L225 Difference]: With dead ends: 95 [2022-11-03 02:11:05,204 INFO L226 Difference]: Without dead ends: 93 [2022-11-03 02:11:05,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=260, Invalid=1462, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 02:11:05,206 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 239 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:05,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 553 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 263 Invalid, 0 Unknown, 324 Unchecked, 0.4s Time] [2022-11-03 02:11:05,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-03 02:11:05,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2022-11-03 02:11:05,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 52 states have internal predecessors, (71), 0 states have call successors, (0), 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 02:11:05,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 71 transitions. [2022-11-03 02:11:05,216 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 71 transitions. Word has length 18 [2022-11-03 02:11:05,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:05,217 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 71 transitions. [2022-11-03 02:11:05,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 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 02:11:05,217 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 71 transitions. [2022-11-03 02:11:05,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:11:05,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:05,218 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 02:11:05,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2022-11-03 02:11:05,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:05,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:05,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:05,822 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:05,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:05,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1860974601, now seen corresponding path program 1 times [2022-11-03 02:11:05,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:05,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1238633316] [2022-11-03 02:11:05,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:05,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:05,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:05,825 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:05,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:11:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:05,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:11:05,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:06,021 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 02:11:06,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:06,022 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:06,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1238633316] [2022-11-03 02:11:06,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1238633316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:06,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:06,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:11:06,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629329373] [2022-11-03 02:11:06,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:06,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:11:06,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:06,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:11:06,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:11:06,025 INFO L87 Difference]: Start difference. First operand 53 states and 71 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 02:11:06,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:06,081 INFO L93 Difference]: Finished difference Result 85 states and 114 transitions. [2022-11-03 02:11:06,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:11:06,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 02:11:06,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:06,083 INFO L225 Difference]: With dead ends: 85 [2022-11-03 02:11:06,083 INFO L226 Difference]: Without dead ends: 55 [2022-11-03 02:11:06,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 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 02:11:06,084 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:06,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 47 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 7 Unchecked, 0.0s Time] [2022-11-03 02:11:06,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-03 02:11:06,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-11-03 02:11:06,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 54 states have internal predecessors, (71), 0 states have call successors, (0), 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 02:11:06,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2022-11-03 02:11:06,093 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 18 [2022-11-03 02:11:06,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:06,094 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2022-11-03 02:11:06,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 02:11:06,094 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2022-11-03 02:11:06,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:11:06,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:06,095 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 02:11:06,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:06,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:06,316 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:06,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:06,317 INFO L85 PathProgramCache]: Analyzing trace with hash -42079245, now seen corresponding path program 1 times [2022-11-03 02:11:06,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:06,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404993292] [2022-11-03 02:11:06,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:06,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:06,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:06,319 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:06,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:11:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:06,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:11:06,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:06,437 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 02:11:06,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:06,438 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:06,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404993292] [2022-11-03 02:11:06,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404993292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:06,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:06,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:11:06,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757929446] [2022-11-03 02:11:06,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:06,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:11:06,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:06,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:11:06,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:11:06,441 INFO L87 Difference]: Start difference. First operand 55 states and 71 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 02:11:06,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:06,535 INFO L93 Difference]: Finished difference Result 129 states and 165 transitions. [2022-11-03 02:11:06,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:11:06,536 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 02:11:06,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:06,537 INFO L225 Difference]: With dead ends: 129 [2022-11-03 02:11:06,537 INFO L226 Difference]: Without dead ends: 93 [2022-11-03 02:11:06,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:11:06,539 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 61 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:06,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 74 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:11:06,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-03 02:11:06,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 55. [2022-11-03 02:11:06,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 54 states have internal predecessors, (69), 0 states have call successors, (0), 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 02:11:06,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2022-11-03 02:11:06,550 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 18 [2022-11-03 02:11:06,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:06,550 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2022-11-03 02:11:06,550 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 02:11:06,551 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2022-11-03 02:11:06,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:11:06,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:06,552 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 02:11:06,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-11-03 02:11:06,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:06,766 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:06,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:06,766 INFO L85 PathProgramCache]: Analyzing trace with hash 72179319, now seen corresponding path program 1 times [2022-11-03 02:11:06,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:06,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606943573] [2022-11-03 02:11:06,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:06,767 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:06,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:06,776 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:06,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:11:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:06,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:11:06,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:06,953 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 02:11:06,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:06,953 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:06,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606943573] [2022-11-03 02:11:06,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606943573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:06,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:06,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:11:06,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583533733] [2022-11-03 02:11:06,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:06,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:11:06,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:06,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:11:06,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:11:06,957 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 02:11:06,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:06,997 INFO L93 Difference]: Finished difference Result 87 states and 111 transitions. [2022-11-03 02:11:06,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:11:06,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 02:11:06,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:06,999 INFO L225 Difference]: With dead ends: 87 [2022-11-03 02:11:06,999 INFO L226 Difference]: Without dead ends: 49 [2022-11-03 02:11:07,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 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 02:11:07,000 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:07,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 51 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 5 Unchecked, 0.0s Time] [2022-11-03 02:11:07,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-03 02:11:07,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-03 02:11:07,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 0 states have call successors, (0), 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 02:11:07,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-11-03 02:11:07,008 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 18 [2022-11-03 02:11:07,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:07,009 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-11-03 02:11:07,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 02:11:07,009 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-11-03 02:11:07,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:11:07,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:07,010 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 02:11:07,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:07,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:07,230 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:07,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:07,231 INFO L85 PathProgramCache]: Analyzing trace with hash -386092917, now seen corresponding path program 1 times [2022-11-03 02:11:07,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:07,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182481548] [2022-11-03 02:11:07,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:07,232 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:07,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:07,236 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:07,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:11:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:07,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 02:11:07,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:08,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:09,916 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:09,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182481548] [2022-11-03 02:11:09,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [182481548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:09,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1932607783] [2022-11-03 02:11:09,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:09,917 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:11:09,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:11:09,922 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:11:09,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-03 02:11:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:10,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 02:11:10,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:10,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:10,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1932607783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:10,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133829986] [2022-11-03 02:11:10,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:10,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:10,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:11:10,992 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:11:11,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:11:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:11,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 02:11:11,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:11,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:11,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133829986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:11,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:11:11,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 15, 15] total 28 [2022-11-03 02:11:11,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566348058] [2022-11-03 02:11:11,950 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:11:11,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:11:11,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:11,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:11:11,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:11:11,955 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 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 02:11:13,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:13,477 INFO L93 Difference]: Finished difference Result 106 states and 135 transitions. [2022-11-03 02:11:13,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 02:11:13,478 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 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 02:11:13,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:13,479 INFO L225 Difference]: With dead ends: 106 [2022-11-03 02:11:13,479 INFO L226 Difference]: Without dead ends: 91 [2022-11-03 02:11:13,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 02:11:13,481 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 119 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:13,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 361 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 138 Invalid, 0 Unknown, 204 Unchecked, 0.3s Time] [2022-11-03 02:11:13,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-03 02:11:13,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 55. [2022-11-03 02:11:13,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 54 states have internal predecessors, (69), 0 states have call successors, (0), 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 02:11:13,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2022-11-03 02:11:13,489 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 31 [2022-11-03 02:11:13,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:13,490 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2022-11-03 02:11:13,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 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 02:11:13,490 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2022-11-03 02:11:13,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:11:13,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:13,491 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 02:11:13,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2022-11-03 02:11:13,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:13,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:14,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:14,095 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:14,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:14,096 INFO L85 PathProgramCache]: Analyzing trace with hash 293965453, now seen corresponding path program 1 times [2022-11-03 02:11:14,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:14,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843881419] [2022-11-03 02:11:14,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:14,097 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:14,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:14,098 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:14,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:11:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:14,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-03 02:11:14,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:15,673 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 02:11:15,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:18,828 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 02:11:18,829 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:18,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843881419] [2022-11-03 02:11:18,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843881419] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:18,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1776297367] [2022-11-03 02:11:18,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:18,830 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:11:18,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:11:18,832 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:11:18,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-03 02:11:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:19,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-03 02:11:19,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:19,636 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 02:11:19,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:20,098 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 02:11:20,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1776297367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:20,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043277715] [2022-11-03 02:11:20,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:20,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:20,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:11:20,100 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:11:20,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 02:11:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:20,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-03 02:11:20,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:20,844 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 02:11:20,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:21,500 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 02:11:21,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043277715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:21,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:11:21,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22, 22, 23, 23] total 44 [2022-11-03 02:11:21,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337417325] [2022-11-03 02:11:21,501 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:11:21,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 02:11:21,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:21,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 02:11:21,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1764, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 02:11:21,504 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 states have internal predecessors, (64), 0 states have call successors, (0), 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 02:11:36,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:36,122 INFO L93 Difference]: Finished difference Result 215 states and 278 transitions. [2022-11-03 02:11:36,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-03 02:11:36,123 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 states have internal predecessors, (64), 0 states have call successors, (0), 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 02:11:36,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:36,125 INFO L225 Difference]: With dead ends: 215 [2022-11-03 02:11:36,125 INFO L226 Difference]: Without dead ends: 213 [2022-11-03 02:11:36,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 138 SyntacticMatches, 4 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2919 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=1245, Invalid=11865, Unknown=0, NotChecked=0, Total=13110 [2022-11-03 02:11:36,131 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 414 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 2372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1578 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:36,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 1163 Invalid, 2372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 724 Invalid, 0 Unknown, 1578 Unchecked, 1.2s Time] [2022-11-03 02:11:36,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-11-03 02:11:36,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 96. [2022-11-03 02:11:36,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.3157894736842106) internal successors, (125), 95 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 02:11:36,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 125 transitions. [2022-11-03 02:11:36,147 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 125 transitions. Word has length 31 [2022-11-03 02:11:36,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:36,148 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 125 transitions. [2022-11-03 02:11:36,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 states have internal predecessors, (64), 0 states have call successors, (0), 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 02:11:36,148 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 125 transitions. [2022-11-03 02:11:36,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:11:36,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:36,150 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 02:11:36,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:36,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:36,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:36,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:36,753 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:36,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:36,754 INFO L85 PathProgramCache]: Analyzing trace with hash 2068972815, now seen corresponding path program 1 times [2022-11-03 02:11:36,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:36,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413240793] [2022-11-03 02:11:36,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:36,755 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:36,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:36,757 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:36,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:11:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:36,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:11:36,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:37,272 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:37,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:37,842 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:37,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413240793] [2022-11-03 02:11:37,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413240793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:37,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1738987321] [2022-11-03 02:11:37,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:37,843 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:11:37,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:11:37,846 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:11:37,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-03 02:11:38,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:38,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:11:38,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:38,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:38,582 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:38,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1738987321] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:38,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103578276] [2022-11-03 02:11:38,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:38,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:38,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:11:38,586 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:11:38,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 02:11:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:38,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-03 02:11:38,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:40,530 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 02:11:40,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:43,780 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 02:11:43,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103578276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:43,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:11:43,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 21, 21] total 54 [2022-11-03 02:11:43,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852549701] [2022-11-03 02:11:43,781 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:11:43,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-03 02:11:43,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:43,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-03 02:11:43,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2717, Unknown=0, NotChecked=0, Total=2862 [2022-11-03 02:11:43,783 INFO L87 Difference]: Start difference. First operand 96 states and 125 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 54 states have internal predecessors, (113), 0 states have call successors, (0), 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 02:11:54,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:54,985 INFO L93 Difference]: Finished difference Result 261 states and 343 transitions. [2022-11-03 02:11:54,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-03 02:11:54,985 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 54 states have internal predecessors, (113), 0 states have call successors, (0), 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 02:11:54,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:54,987 INFO L225 Difference]: With dead ends: 261 [2022-11-03 02:11:54,987 INFO L226 Difference]: Without dead ends: 207 [2022-11-03 02:11:54,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=849, Invalid=8853, Unknown=0, NotChecked=0, Total=9702 [2022-11-03 02:11:54,991 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 315 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 962 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:54,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 833 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 328 Invalid, 0 Unknown, 962 Unchecked, 0.6s Time] [2022-11-03 02:11:54,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-03 02:11:55,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 121. [2022-11-03 02:11:55,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.275) internal successors, (153), 120 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:55,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 153 transitions. [2022-11-03 02:11:55,012 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 153 transitions. Word has length 31 [2022-11-03 02:11:55,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:55,013 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 153 transitions. [2022-11-03 02:11:55,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 54 states have internal predecessors, (113), 0 states have call successors, (0), 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 02:11:55,013 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 153 transitions. [2022-11-03 02:11:55,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:11:55,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:55,015 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 02:11:55,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:55,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2022-11-03 02:11:55,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:55,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:55,631 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:55,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:55,632 INFO L85 PathProgramCache]: Analyzing trace with hash -407099125, now seen corresponding path program 1 times [2022-11-03 02:11:55,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:55,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081160951] [2022-11-03 02:11:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:55,633 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:55,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:55,635 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:55,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:11:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:55,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-03 02:11:55,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:56,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:56,534 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:56,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081160951] [2022-11-03 02:11:56,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081160951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:56,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [332283157] [2022-11-03 02:11:56,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:56,535 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:11:56,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:11:56,538 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:11:56,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-03 02:11:56,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:56,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:11:56,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:56,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:57,018 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:57,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [332283157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:57,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456447591] [2022-11-03 02:11:57,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:57,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:57,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:11:57,020 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:11:57,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-03 02:11:57,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:57,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:11:57,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:57,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:57,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456447591] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:57,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:11:57,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 8, 8] total 27 [2022-11-03 02:11:57,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858741452] [2022-11-03 02:11:57,567 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:11:57,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 02:11:57,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:57,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 02:11:57,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:11:57,568 INFO L87 Difference]: Start difference. First operand 121 states and 153 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:58,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:58,781 INFO L93 Difference]: Finished difference Result 247 states and 313 transitions. [2022-11-03 02:11:58,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 02:11:58,782 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-03 02:11:58,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:58,783 INFO L225 Difference]: With dead ends: 247 [2022-11-03 02:11:58,783 INFO L226 Difference]: Without dead ends: 192 [2022-11-03 02:11:58,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=571, Invalid=1591, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 02:11:58,790 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 373 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:58,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 315 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:11:58,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-03 02:11:58,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 121. [2022-11-03 02:11:58,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.2333333333333334) internal successors, (148), 120 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 02:11:58,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 148 transitions. [2022-11-03 02:11:58,834 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 148 transitions. Word has length 31 [2022-11-03 02:11:58,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:58,839 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 148 transitions. [2022-11-03 02:11:58,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:58,840 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 148 transitions. [2022-11-03 02:11:58,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:11:58,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:58,841 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 02:11:58,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2022-11-03 02:11:59,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:59,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-11-03 02:11:59,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:59,446 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:59,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:59,447 INFO L85 PathProgramCache]: Analyzing trace with hash -292840561, now seen corresponding path program 1 times [2022-11-03 02:11:59,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:59,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793662210] [2022-11-03 02:11:59,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:59,448 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:59,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:59,449 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:59,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 02:11:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:59,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:11:59,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:59,942 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:59,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:00,477 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:00,477 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:00,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793662210] [2022-11-03 02:12:00,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793662210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:12:00,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1386978973] [2022-11-03 02:12:00,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:00,478 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:12:00,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:12:00,479 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:12:00,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-03 02:12:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:00,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:12:00,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:00,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:01,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1386978973] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:12:01,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774406244] [2022-11-03 02:12:01,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:01,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:12:01,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:12:01,135 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:12:01,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-03 02:12:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:01,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:12:01,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:01,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:01,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774406244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:12:01,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:12:01,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 17 [2022-11-03 02:12:01,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113059044] [2022-11-03 02:12:01,660 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:12:01,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:12:01,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:12:01,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:12:01,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:12:01,661 INFO L87 Difference]: Start difference. First operand 121 states and 148 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 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 02:12:02,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:02,208 INFO L93 Difference]: Finished difference Result 180 states and 221 transitions. [2022-11-03 02:12:02,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:12:02,209 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 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 02:12:02,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:02,210 INFO L225 Difference]: With dead ends: 180 [2022-11-03 02:12:02,210 INFO L226 Difference]: Without dead ends: 123 [2022-11-03 02:12:02,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:12:02,212 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 84 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:02,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 201 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 100 Unchecked, 0.1s Time] [2022-11-03 02:12:02,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-03 02:12:02,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2022-11-03 02:12:02,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.2155172413793103) internal successors, (141), 116 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 02:12:02,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2022-11-03 02:12:02,229 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 31 [2022-11-03 02:12:02,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:02,230 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2022-11-03 02:12:02,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 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 02:12:02,230 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2022-11-03 02:12:02,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:12:02,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:02,231 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 02:12:02,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:02,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:02,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:02,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:12:02,838 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:02,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:02,838 INFO L85 PathProgramCache]: Analyzing trace with hash 512820171, now seen corresponding path program 1 times [2022-11-03 02:12:02,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:12:02,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087684402] [2022-11-03 02:12:02,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:02,839 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:12:02,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:12:02,840 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:12:02,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 02:12:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:02,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:12:02,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:12:03,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:12:03,133 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:03,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087684402] [2022-11-03 02:12:03,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087684402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:03,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:03,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:12:03,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871158555] [2022-11-03 02:12:03,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:03,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:12:03,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:12:03,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:12:03,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:12:03,135 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 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 02:12:03,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:03,376 INFO L93 Difference]: Finished difference Result 157 states and 193 transitions. [2022-11-03 02:12:03,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:12:03,377 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 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 02:12:03,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:03,378 INFO L225 Difference]: With dead ends: 157 [2022-11-03 02:12:03,378 INFO L226 Difference]: Without dead ends: 121 [2022-11-03 02:12:03,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:12:03,379 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:03,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 100 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-11-03 02:12:03,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-03 02:12:03,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-03 02:12:03,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.2083333333333333) internal successors, (145), 120 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 02:12:03,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 145 transitions. [2022-11-03 02:12:03,395 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 145 transitions. Word has length 31 [2022-11-03 02:12:03,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:03,396 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 145 transitions. [2022-11-03 02:12:03,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 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 02:12:03,397 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 145 transitions. [2022-11-03 02:12:03,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:12:03,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:03,398 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 02:12:03,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:03,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:12:03,613 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:03,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:03,613 INFO L85 PathProgramCache]: Analyzing trace with hash 2131737349, now seen corresponding path program 2 times [2022-11-03 02:12:03,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:12:03,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838261596] [2022-11-03 02:12:03,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:12:03,614 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:12:03,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:12:03,616 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:12:03,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:12:03,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:12:03,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:12:03,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-03 02:12:03,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:05,133 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 02:12:05,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:08,769 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 02:12:08,769 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:08,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838261596] [2022-11-03 02:12:08,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838261596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:12:08,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [303936095] [2022-11-03 02:12:08,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:12:08,770 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:12:08,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:12:08,771 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:12:08,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-03 02:12:09,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:12:09,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:12:09,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-03 02:12:09,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:09,487 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 02:12:09,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:09,920 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 02:12:09,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [303936095] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:12:09,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187289746] [2022-11-03 02:12:09,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:12:09,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:12:09,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:12:09,922 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:12:09,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-03 02:12:10,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:12:10,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:12:10,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-03 02:12:10,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:10,504 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 02:12:10,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:10,904 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 02:12:10,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187289746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:12:10,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:12:10,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22, 22, 22, 22] total 42 [2022-11-03 02:12:10,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794812323] [2022-11-03 02:12:10,905 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:12:10,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 02:12:10,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:12:10,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 02:12:10,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 02:12:10,907 INFO L87 Difference]: Start difference. First operand 121 states and 145 transitions. Second operand has 42 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 0 states have call successors, (0), 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 02:12:13,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:13,927 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2022-11-03 02:12:13,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-03 02:12:13,928 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 0 states have call successors, (0), 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 02:12:13,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:13,929 INFO L225 Difference]: With dead ends: 160 [2022-11-03 02:12:13,929 INFO L226 Difference]: Without dead ends: 158 [2022-11-03 02:12:13,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=523, Invalid=3637, Unknown=0, NotChecked=0, Total=4160 [2022-11-03 02:12:13,932 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 163 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 464 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:13,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 769 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 360 Invalid, 0 Unknown, 464 Unchecked, 0.5s Time] [2022-11-03 02:12:13,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-03 02:12:13,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 134. [2022-11-03 02:12:13,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.218045112781955) internal successors, (162), 133 states have internal predecessors, (162), 0 states have call successors, (0), 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 02:12:13,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 162 transitions. [2022-11-03 02:12:13,949 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 162 transitions. Word has length 31 [2022-11-03 02:12:13,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:13,949 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 162 transitions. [2022-11-03 02:12:13,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 0 states have call successors, (0), 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 02:12:13,950 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 162 transitions. [2022-11-03 02:12:13,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:12:13,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:13,950 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 02:12:13,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-11-03 02:12:14,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:14,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:14,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:12:14,552 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:14,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:14,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1483171577, now seen corresponding path program 2 times [2022-11-03 02:12:14,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:12:14,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [70050857] [2022-11-03 02:12:14,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:12:14,553 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:12:14,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:12:14,554 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:12:14,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 02:12:14,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:12:14,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:12:14,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 02:12:14,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:15,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:18,356 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:18,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [70050857] [2022-11-03 02:12:18,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [70050857] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:12:18,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2003958197] [2022-11-03 02:12:18,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:12:18,357 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:12:18,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:12:18,358 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:12:18,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-03 02:12:18,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:12:18,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:12:18,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 02:12:18,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:20,552 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 02:12:20,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:25,890 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 02:12:25,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2003958197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:12:25,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494987604] [2022-11-03 02:12:25,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:12:25,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:12:25,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:12:25,892 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:12:25,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-03 02:12:25,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:12:25,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:12:25,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 02:12:25,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:26,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:26,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:26,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494987604] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:12:26,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:12:26,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 25, 25, 19, 19] total 75 [2022-11-03 02:12:26,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247702995] [2022-11-03 02:12:26,635 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:12:26,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-03 02:12:26,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:12:26,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-03 02:12:26,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=5273, Unknown=0, NotChecked=0, Total=5550 [2022-11-03 02:12:26,638 INFO L87 Difference]: Start difference. First operand 134 states and 162 transitions. Second operand has 75 states, 75 states have (on average 1.4266666666666667) internal successors, (107), 75 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 02:12:42,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:42,859 INFO L93 Difference]: Finished difference Result 236 states and 296 transitions. [2022-11-03 02:12:42,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-03 02:12:42,860 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.4266666666666667) internal successors, (107), 75 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 02:12:42,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:42,861 INFO L225 Difference]: With dead ends: 236 [2022-11-03 02:12:42,862 INFO L226 Difference]: Without dead ends: 217 [2022-11-03 02:12:42,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 108 SyntacticMatches, 6 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3368 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=1469, Invalid=15043, Unknown=0, NotChecked=0, Total=16512 [2022-11-03 02:12:42,867 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 374 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 2253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1466 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:42,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 1104 Invalid, 2253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 748 Invalid, 0 Unknown, 1466 Unchecked, 1.0s Time] [2022-11-03 02:12:42,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-03 02:12:42,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 155. [2022-11-03 02:12:42,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.2337662337662338) internal successors, (190), 154 states have internal predecessors, (190), 0 states have call successors, (0), 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 02:12:42,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 190 transitions. [2022-11-03 02:12:42,890 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 190 transitions. Word has length 31 [2022-11-03 02:12:42,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:42,890 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 190 transitions. [2022-11-03 02:12:42,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.4266666666666667) internal successors, (107), 75 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 02:12:42,891 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 190 transitions. [2022-11-03 02:12:42,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:12:42,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:42,892 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 02:12:42,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:43,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:43,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:43,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:12:43,512 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:43,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:43,513 INFO L85 PathProgramCache]: Analyzing trace with hash 293682827, now seen corresponding path program 1 times [2022-11-03 02:12:43,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:12:43,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614419499] [2022-11-03 02:12:43,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:43,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:12:43,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:12:43,514 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:12:43,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 02:12:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:43,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:12:43,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:43,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:44,709 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:44,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614419499] [2022-11-03 02:12:44,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614419499] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:12:44,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [19635830] [2022-11-03 02:12:44,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:44,710 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:12:44,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:12:44,711 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:12:44,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-03 02:12:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:44,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:12:44,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:45,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:45,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [19635830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:12:45,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298125529] [2022-11-03 02:12:45,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:45,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:12:45,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:12:45,322 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:12:45,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-03 02:12:45,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:45,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 02:12:45,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:47,378 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 02:12:47,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:51,623 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 02:12:51,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298125529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:12:51,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:12:51,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 24, 24] total 66 [2022-11-03 02:12:51,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347333885] [2022-11-03 02:12:51,624 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:12:51,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-03 02:12:51,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:12:51,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-03 02:12:51,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=4118, Unknown=0, NotChecked=0, Total=4290 [2022-11-03 02:12:51,626 INFO L87 Difference]: Start difference. First operand 155 states and 190 transitions. Second operand has 66 states, 66 states have (on average 1.7121212121212122) internal successors, (113), 66 states have internal predecessors, (113), 0 states have call successors, (0), 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 02:13:02,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:02,174 INFO L93 Difference]: Finished difference Result 231 states and 285 transitions. [2022-11-03 02:13:02,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-03 02:13:02,175 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.7121212121212122) internal successors, (113), 66 states have internal predecessors, (113), 0 states have call successors, (0), 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 02:13:02,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:02,176 INFO L225 Difference]: With dead ends: 231 [2022-11-03 02:13:02,176 INFO L226 Difference]: Without dead ends: 205 [2022-11-03 02:13:02,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 117 SyntacticMatches, 6 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=1147, Invalid=11063, Unknown=0, NotChecked=0, Total=12210 [2022-11-03 02:13:02,178 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 355 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1104 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:02,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 1088 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 435 Invalid, 0 Unknown, 1104 Unchecked, 0.6s Time] [2022-11-03 02:13:02,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-03 02:13:02,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 155. [2022-11-03 02:13:02,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.2142857142857142) internal successors, (187), 154 states have internal predecessors, (187), 0 states have call successors, (0), 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 02:13:02,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 187 transitions. [2022-11-03 02:13:02,194 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 187 transitions. Word has length 31 [2022-11-03 02:13:02,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:02,194 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 187 transitions. [2022-11-03 02:13:02,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.7121212121212122) internal successors, (113), 66 states have internal predecessors, (113), 0 states have call successors, (0), 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 02:13:02,195 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 187 transitions. [2022-11-03 02:13:02,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:13:02,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:02,195 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 02:13:02,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:02,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:02,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:02,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:13:02,797 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:02,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:02,797 INFO L85 PathProgramCache]: Analyzing trace with hash 2112578183, now seen corresponding path program 1 times [2022-11-03 02:13:02,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:02,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1291343172] [2022-11-03 02:13:02,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:02,798 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:02,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:02,805 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:02,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 02:13:02,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:02,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 02:13:02,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:03,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:04,165 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:04,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1291343172] [2022-11-03 02:13:04,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1291343172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:04,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [966632622] [2022-11-03 02:13:04,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:04,166 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:13:04,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:13:04,167 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:13:04,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-03 02:13:04,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:04,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:13:04,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:04,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:04,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [966632622] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:04,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147904552] [2022-11-03 02:13:04,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:04,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:13:04,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:13:04,661 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:13:04,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-03 02:13:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:04,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 02:13:04,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:04,956 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:04,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:05,026 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:05,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147904552] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:05,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:13:05,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16, 16, 16, 16] total 28 [2022-11-03 02:13:05,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086294248] [2022-11-03 02:13:05,028 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:13:05,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:13:05,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:05,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:13:05,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:13:05,029 INFO L87 Difference]: Start difference. First operand 155 states and 187 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 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 02:13:07,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:07,727 INFO L93 Difference]: Finished difference Result 238 states and 284 transitions. [2022-11-03 02:13:07,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 02:13:07,728 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 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 02:13:07,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:07,729 INFO L225 Difference]: With dead ends: 238 [2022-11-03 02:13:07,729 INFO L226 Difference]: Without dead ends: 202 [2022-11-03 02:13:07,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=497, Invalid=2259, Unknown=0, NotChecked=0, Total=2756 [2022-11-03 02:13:07,730 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 279 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:07,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 378 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:13:07,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-03 02:13:07,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 155. [2022-11-03 02:13:07,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.1948051948051948) internal successors, (184), 154 states have internal predecessors, (184), 0 states have call successors, (0), 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 02:13:07,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2022-11-03 02:13:07,755 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 31 [2022-11-03 02:13:07,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:07,755 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2022-11-03 02:13:07,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 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 02:13:07,756 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2022-11-03 02:13:07,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:13:07,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:07,757 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 02:13:07,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:07,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:08,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2022-11-03 02:13:08,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:13:08,372 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:08,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:08,373 INFO L85 PathProgramCache]: Analyzing trace with hash -2068130549, now seen corresponding path program 1 times [2022-11-03 02:13:08,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:08,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28243892] [2022-11-03 02:13:08,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:08,373 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:08,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:08,374 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:08,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 02:13:08,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:08,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:13:08,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:08,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:09,712 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:09,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28243892] [2022-11-03 02:13:09,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [28243892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:09,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1664577600] [2022-11-03 02:13:09,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:09,713 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:13:09,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:13:09,714 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:13:09,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-03 02:13:09,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:09,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:13:09,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:10,081 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:10,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:10,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1664577600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:10,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643678058] [2022-11-03 02:13:10,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:10,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:13:10,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:13:10,265 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:13:10,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-03 02:13:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:10,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:13:10,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:10,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:10,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:10,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643678058] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:10,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:13:10,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 23 [2022-11-03 02:13:10,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958271771] [2022-11-03 02:13:10,777 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:13:10,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 02:13:10,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:10,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 02:13:10,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:13:10,778 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 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 02:13:11,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:11,320 INFO L93 Difference]: Finished difference Result 241 states and 288 transitions. [2022-11-03 02:13:11,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 02:13:11,321 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 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 02:13:11,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:11,322 INFO L225 Difference]: With dead ends: 241 [2022-11-03 02:13:11,322 INFO L226 Difference]: Without dead ends: 207 [2022-11-03 02:13:11,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:13:11,324 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:11,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 328 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 69 Invalid, 0 Unknown, 195 Unchecked, 0.1s Time] [2022-11-03 02:13:11,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-03 02:13:11,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 151. [2022-11-03 02:13:11,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.1866666666666668) internal successors, (178), 150 states have internal predecessors, (178), 0 states have call successors, (0), 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 02:13:11,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 178 transitions. [2022-11-03 02:13:11,343 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 178 transitions. Word has length 31 [2022-11-03 02:13:11,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:11,344 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 178 transitions. [2022-11-03 02:13:11,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 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 02:13:11,344 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 178 transitions. [2022-11-03 02:13:11,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:13:11,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:11,345 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 02:13:11,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-11-03 02:13:11,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2022-11-03 02:13:11,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:11,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:13:11,953 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:11,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:11,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1105025141, now seen corresponding path program 3 times [2022-11-03 02:13:11,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:11,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865982975] [2022-11-03 02:13:11,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:13:11,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:11,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:11,955 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:11,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 02:13:12,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:13:12,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:13:12,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-03 02:13:12,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:14,217 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 02:13:14,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:18,516 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 02:13:18,516 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:18,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865982975] [2022-11-03 02:13:18,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1865982975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:18,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [251113877] [2022-11-03 02:13:18,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:13:18,517 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:13:18,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:13:18,518 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:13:18,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-03 02:13:18,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:13:18,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:13:18,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-03 02:13:18,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:20,806 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 02:13:20,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:24,585 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 02:13:24,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [251113877] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:24,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391670055] [2022-11-03 02:13:24,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:13:24,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:13:24,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:13:24,587 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:13:24,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-03 02:13:24,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:13:24,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:13:24,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-03 02:13:24,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:25,635 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 02:13:25,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:27,137 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 02:13:27,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391670055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:27,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:13:27,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20, 20, 20, 20] total 56 [2022-11-03 02:13:27,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531772515] [2022-11-03 02:13:27,138 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:13:27,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-03 02:13:27,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:27,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-03 02:13:27,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=2764, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 02:13:27,140 INFO L87 Difference]: Start difference. First operand 151 states and 178 transitions. Second operand has 56 states, 56 states have (on average 2.25) internal successors, (126), 56 states have internal predecessors, (126), 0 states have call successors, (0), 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 02:13:33,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:33,834 INFO L93 Difference]: Finished difference Result 253 states and 304 transitions. [2022-11-03 02:13:33,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-03 02:13:33,835 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.25) internal successors, (126), 56 states have internal predecessors, (126), 0 states have call successors, (0), 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 02:13:33,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:33,837 INFO L225 Difference]: With dead ends: 253 [2022-11-03 02:13:33,837 INFO L226 Difference]: Without dead ends: 251 [2022-11-03 02:13:33,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 209 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=910, Invalid=6922, Unknown=0, NotChecked=0, Total=7832 [2022-11-03 02:13:33,839 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 78 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:33,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 551 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 328 Unchecked, 0.0s Time] [2022-11-03 02:13:33,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-11-03 02:13:33,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 193. [2022-11-03 02:13:33,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.203125) internal successors, (231), 192 states have internal predecessors, (231), 0 states have call successors, (0), 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 02:13:33,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 231 transitions. [2022-11-03 02:13:33,863 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 231 transitions. Word has length 44 [2022-11-03 02:13:33,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:33,864 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 231 transitions. [2022-11-03 02:13:33,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.25) internal successors, (126), 56 states have internal predecessors, (126), 0 states have call successors, (0), 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 02:13:33,864 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 231 transitions. [2022-11-03 02:13:33,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:13:33,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:33,865 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 02:13:33,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2022-11-03 02:13:34,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:34,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:34,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:13:34,469 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:34,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:34,470 INFO L85 PathProgramCache]: Analyzing trace with hash 737073845, now seen corresponding path program 2 times [2022-11-03 02:13:34,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:34,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138192450] [2022-11-03 02:13:34,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:13:34,471 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:34,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:34,472 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:34,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 02:13:34,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:13:34,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:13:34,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 02:13:34,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:35,259 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 02:13:35,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:37,079 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 02:13:37,079 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:37,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138192450] [2022-11-03 02:13:37,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138192450] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:37,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1874957616] [2022-11-03 02:13:37,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:13:37,080 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:13:37,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:13:37,090 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:13:37,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-03 02:13:37,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:13:37,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:13:37,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 02:13:37,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:37,671 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 02:13:37,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:38,045 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 02:13:38,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1874957616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:38,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481876126] [2022-11-03 02:13:38,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:13:38,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:13:38,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:13:38,047 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:13:38,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-03 02:13:38,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:13:38,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:13:38,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 02:13:38,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:38,435 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 02:13:38,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:38,815 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 02:13:38,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481876126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:38,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:13:38,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 15, 15] total 28 [2022-11-03 02:13:38,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664401063] [2022-11-03 02:13:38,816 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:13:38,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:13:38,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:38,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:13:38,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:13:38,817 INFO L87 Difference]: Start difference. First operand 193 states and 231 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 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 02:13:40,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:40,289 INFO L93 Difference]: Finished difference Result 306 states and 378 transitions. [2022-11-03 02:13:40,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 02:13:40,290 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 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 02:13:40,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:40,291 INFO L225 Difference]: With dead ends: 306 [2022-11-03 02:13:40,292 INFO L226 Difference]: Without dead ends: 212 [2022-11-03 02:13:40,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 230 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=289, Invalid=1691, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 02:13:40,293 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 119 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:40,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 506 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 153 Invalid, 0 Unknown, 302 Unchecked, 0.3s Time] [2022-11-03 02:13:40,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-11-03 02:13:40,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 180. [2022-11-03 02:13:40,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.2011173184357542) internal successors, (215), 179 states have internal predecessors, (215), 0 states have call successors, (0), 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 02:13:40,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 215 transitions. [2022-11-03 02:13:40,316 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 215 transitions. Word has length 44 [2022-11-03 02:13:40,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:40,316 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 215 transitions. [2022-11-03 02:13:40,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 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 02:13:40,317 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 215 transitions. [2022-11-03 02:13:40,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:13:40,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:40,317 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 02:13:40,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:40,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:40,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Ended with exit code 0 [2022-11-03 02:13:40,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:13:40,921 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:40,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:40,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1352170259, now seen corresponding path program 4 times [2022-11-03 02:13:40,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:40,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252266603] [2022-11-03 02:13:40,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:13:40,922 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:40,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:40,923 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:40,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 02:13:41,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:13:41,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:13:41,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-03 02:13:41,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:43,958 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 02:13:43,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:51,360 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 02:13:51,360 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:51,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252266603] [2022-11-03 02:13:51,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1252266603] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:51,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1084057877] [2022-11-03 02:13:51,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:13:51,361 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:13:51,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:13:51,362 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:13:51,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-03 02:13:51,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:13:51,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:13:51,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-03 02:13:51,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:52,558 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 02:13:52,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:53,275 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 02:13:53,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1084057877] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:53,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332388856] [2022-11-03 02:13:53,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:13:53,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:13:53,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:13:53,277 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:13:53,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-03 02:13:53,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:13:53,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:13:53,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 105 conjunts are in the unsatisfiable core [2022-11-03 02:13:53,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:54,500 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 02:13:54,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:55,638 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 02:13:55,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332388856] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:55,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:13:55,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29, 29, 30, 30] total 58 [2022-11-03 02:13:55,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151791523] [2022-11-03 02:13:55,640 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:13:55,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-03 02:13:55,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:55,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-03 02:13:55,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=2924, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 02:13:55,642 INFO L87 Difference]: Start difference. First operand 180 states and 215 transitions. Second operand has 58 states, 58 states have (on average 1.5517241379310345) internal successors, (90), 58 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 02:14:08,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:08,140 INFO L93 Difference]: Finished difference Result 260 states and 316 transitions. [2022-11-03 02:14:08,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-03 02:14:08,141 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.5517241379310345) internal successors, (90), 58 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 02:14:08,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:08,142 INFO L225 Difference]: With dead ends: 260 [2022-11-03 02:14:08,143 INFO L226 Difference]: Without dead ends: 258 [2022-11-03 02:14:08,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=1346, Invalid=9996, Unknown=0, NotChecked=0, Total=11342 [2022-11-03 02:14:08,145 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 313 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 830 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:08,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 794 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 543 Invalid, 0 Unknown, 830 Unchecked, 0.9s Time] [2022-11-03 02:14:08,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-11-03 02:14:08,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 206. [2022-11-03 02:14:08,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.2146341463414634) internal successors, (249), 205 states have internal predecessors, (249), 0 states have call successors, (0), 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 02:14:08,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 249 transitions. [2022-11-03 02:14:08,177 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 249 transitions. Word has length 44 [2022-11-03 02:14:08,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:08,178 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 249 transitions. [2022-11-03 02:14:08,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.5517241379310345) internal successors, (90), 58 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 02:14:08,178 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 249 transitions. [2022-11-03 02:14:08,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:14:08,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:08,179 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 02:14:08,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:08,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:08,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:08,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:14:08,797 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:08,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:08,797 INFO L85 PathProgramCache]: Analyzing trace with hash -672111889, now seen corresponding path program 5 times [2022-11-03 02:14:08,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:08,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146364813] [2022-11-03 02:14:08,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 02:14:08,798 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:08,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:08,799 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:08,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 02:14:08,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-03 02:14:08,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:14:08,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:14:08,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:14:09,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:14:09,612 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:09,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146364813] [2022-11-03 02:14:09,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146364813] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:14:09,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:14:09,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 13 [2022-11-03 02:14:09,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348047128] [2022-11-03 02:14:09,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:09,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:14:09,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:09,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:14:09,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:14:09,616 INFO L87 Difference]: Start difference. First operand 206 states and 249 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:09,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:09,956 INFO L93 Difference]: Finished difference Result 311 states and 387 transitions. [2022-11-03 02:14:09,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:14:09,962 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-03 02:14:09,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:09,963 INFO L225 Difference]: With dead ends: 311 [2022-11-03 02:14:09,963 INFO L226 Difference]: Without dead ends: 238 [2022-11-03 02:14:09,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:14:09,965 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 60 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:09,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 79 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:14:09,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-03 02:14:09,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 190. [2022-11-03 02:14:09,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.1957671957671958) internal successors, (226), 189 states have internal predecessors, (226), 0 states have call successors, (0), 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 02:14:09,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 226 transitions. [2022-11-03 02:14:09,996 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 226 transitions. Word has length 44 [2022-11-03 02:14:09,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:09,997 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 226 transitions. [2022-11-03 02:14:09,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:09,997 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 226 transitions. [2022-11-03 02:14:09,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:14:09,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:09,998 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 02:14:10,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:10,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:10,205 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:10,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:10,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1371329425, now seen corresponding path program 2 times [2022-11-03 02:14:10,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:10,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60931846] [2022-11-03 02:14:10,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:14:10,207 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:10,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:10,208 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:10,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 02:14:10,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:14:10,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:14:10,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 02:14:10,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:11,714 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:11,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:13,967 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:13,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60931846] [2022-11-03 02:14:13,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60931846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:13,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [77681148] [2022-11-03 02:14:13,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:14:13,968 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:14:13,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:14:13,969 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:14:13,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-03 02:14:14,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:14:14,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:14:14,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-03 02:14:14,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:19,598 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 02:14:19,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:29,064 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 02:14:29,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [77681148] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:29,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744763078] [2022-11-03 02:14:29,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:14:29,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:14:29,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:14:29,066 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:14:29,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-03 02:14:29,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:14:29,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:14:29,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 02:14:29,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:29,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:29,765 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:29,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744763078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:29,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:14:29,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 31, 31, 23, 23] total 100 [2022-11-03 02:14:29,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002270898] [2022-11-03 02:14:29,766 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:14:29,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-11-03 02:14:29,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:29,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-11-03 02:14:29,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=9490, Unknown=0, NotChecked=0, Total=9900 [2022-11-03 02:14:29,768 INFO L87 Difference]: Start difference. First operand 190 states and 226 transitions. Second operand has 100 states, 100 states have (on average 1.58) internal successors, (158), 100 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 02:14:52,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:52,661 INFO L93 Difference]: Finished difference Result 250 states and 299 transitions. [2022-11-03 02:14:52,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-03 02:14:52,662 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.58) internal successors, (158), 100 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 02:14:52,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:52,663 INFO L225 Difference]: With dead ends: 250 [2022-11-03 02:14:52,663 INFO L226 Difference]: Without dead ends: 220 [2022-11-03 02:14:52,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5376 ImplicationChecksByTransitivity, 37.5s TimeCoverageRelationStatistics Valid=1730, Invalid=20322, Unknown=0, NotChecked=0, Total=22052 [2022-11-03 02:14:52,666 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 437 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 2314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1080 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:52,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 762 Invalid, 2314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1028 Invalid, 0 Unknown, 1080 Unchecked, 1.8s Time] [2022-11-03 02:14:52,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-03 02:14:52,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 203. [2022-11-03 02:14:52,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.1782178217821782) internal successors, (238), 202 states have internal predecessors, (238), 0 states have call successors, (0), 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 02:14:52,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 238 transitions. [2022-11-03 02:14:52,707 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 238 transitions. Word has length 44 [2022-11-03 02:14:52,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:52,707 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 238 transitions. [2022-11-03 02:14:52,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.58) internal successors, (158), 100 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 02:14:52,708 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 238 transitions. [2022-11-03 02:14:52,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:14:52,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:52,709 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 02:14:52,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:52,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:53,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2022-11-03 02:14:53,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:14:53,324 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:53,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:53,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1257070861, now seen corresponding path program 3 times [2022-11-03 02:14:53,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:53,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270819440] [2022-11-03 02:14:53,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:14:53,325 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:53,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:53,326 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:53,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 02:14:53,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:14:53,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:14:53,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 02:14:53,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:14:53,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:14:55,046 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:55,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270819440] [2022-11-03 02:14:55,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270819440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:55,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1710982128] [2022-11-03 02:14:55,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:14:55,046 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:14:55,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:14:55,047 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:14:55,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-03 02:14:55,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:14:55,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:14:55,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:14:55,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:14:55,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:56,583 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:14:56,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1710982128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:56,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107297236] [2022-11-03 02:14:56,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:14:56,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:14:56,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:14:56,585 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:14:56,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-03 02:14:56,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:14:56,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:14:56,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:14:56,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:57,028 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:14:57,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:14:58,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107297236] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:58,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:14:58,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 10] total 17 [2022-11-03 02:14:58,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683304430] [2022-11-03 02:14:58,056 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:14:58,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:14:58,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:58,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:14:58,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:14:58,058 INFO L87 Difference]: Start difference. First operand 203 states and 238 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 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 02:14:59,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:59,585 INFO L93 Difference]: Finished difference Result 394 states and 469 transitions. [2022-11-03 02:14:59,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:14:59,586 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 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 02:14:59,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:59,588 INFO L225 Difference]: With dead ends: 394 [2022-11-03 02:14:59,588 INFO L226 Difference]: Without dead ends: 343 [2022-11-03 02:14:59,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 241 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:14:59,589 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 124 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:59,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 283 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 167 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2022-11-03 02:14:59,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-11-03 02:14:59,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 207. [2022-11-03 02:14:59,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.174757281553398) internal successors, (242), 206 states have internal predecessors, (242), 0 states have call successors, (0), 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 02:14:59,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 242 transitions. [2022-11-03 02:14:59,627 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 242 transitions. Word has length 44 [2022-11-03 02:14:59,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:59,628 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 242 transitions. [2022-11-03 02:14:59,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 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 02:14:59,628 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 242 transitions. [2022-11-03 02:14:59,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:14:59,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:59,629 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 02:14:59,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:59,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:00,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:00,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:00,242 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:00,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:00,242 INFO L85 PathProgramCache]: Analyzing trace with hash 280714101, now seen corresponding path program 6 times [2022-11-03 02:15:00,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:00,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813097535] [2022-11-03 02:15:00,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 02:15:00,243 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:00,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:00,244 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:00,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-03 02:15:00,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-03 02:15:00,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:15:00,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-03 02:15:00,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:02,289 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 02:15:02,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:09,297 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 02:15:09,298 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:09,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813097535] [2022-11-03 02:15:09,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813097535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:09,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1239766964] [2022-11-03 02:15:09,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 02:15:09,298 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:09,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:15:09,299 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:15:09,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-11-03 02:15:09,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-03 02:15:09,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:15:09,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-03 02:15:09,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:10,195 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 02:15:10,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:10,963 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 02:15:10,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1239766964] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:10,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585075578] [2022-11-03 02:15:10,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 02:15:10,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:10,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:10,965 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:10,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-03 02:15:11,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-03 02:15:11,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:15:11,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-03 02:15:11,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:15:13,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:28,668 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:15:28,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585075578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:28,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:15:28,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24, 24, 17, 17] total 72 [2022-11-03 02:15:28,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650376302] [2022-11-03 02:15:28,669 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:15:28,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-03 02:15:28,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:28,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-03 02:15:28,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=4676, Unknown=2, NotChecked=0, Total=5112 [2022-11-03 02:15:28,671 INFO L87 Difference]: Start difference. First operand 207 states and 242 transitions. Second operand has 72 states, 72 states have (on average 2.2222222222222223) internal successors, (160), 72 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 02:15:43,394 WARN L234 SmtUtils]: Spent 6.39s on a formula simplification that was a NOOP. DAG size: 96 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:15:59,407 WARN L234 SmtUtils]: Spent 6.38s on a formula simplification that was a NOOP. DAG size: 99 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:16:32,088 WARN L234 SmtUtils]: Spent 5.05s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:17:23,622 WARN L234 SmtUtils]: Spent 7.28s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:17:36,522 WARN L234 SmtUtils]: Spent 6.16s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:18:19,820 WARN L234 SmtUtils]: Spent 6.00s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:18:37,834 WARN L234 SmtUtils]: Spent 5.04s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:19:14,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:14,934 INFO L93 Difference]: Finished difference Result 385 states and 476 transitions. [2022-11-03 02:19:14,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-03 02:19:14,934 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.2222222222222223) internal successors, (160), 72 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-03 02:19:14,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:14,936 INFO L225 Difference]: With dead ends: 385 [2022-11-03 02:19:14,936 INFO L226 Difference]: Without dead ends: 383 [2022-11-03 02:19:14,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 190 SyntacticMatches, 8 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4098 ImplicationChecksByTransitivity, 250.0s TimeCoverageRelationStatistics Valid=1919, Invalid=17502, Unknown=39, NotChecked=0, Total=19460 [2022-11-03 02:19:14,941 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 401 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 928 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:14,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 1063 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 335 Invalid, 0 Unknown, 928 Unchecked, 0.5s Time] [2022-11-03 02:19:14,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-11-03 02:19:14,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 293. [2022-11-03 02:19:14,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.2157534246575343) internal successors, (355), 292 states have internal predecessors, (355), 0 states have call successors, (0), 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 02:19:14,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 355 transitions. [2022-11-03 02:19:14,982 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 355 transitions. Word has length 44 [2022-11-03 02:19:14,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:14,982 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 355 transitions. [2022-11-03 02:19:14,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.2222222222222223) internal successors, (160), 72 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 02:19:14,983 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 355 transitions. [2022-11-03 02:19:14,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:19:14,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:14,984 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 02:19:14,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (61)] Ended with exit code 0 [2022-11-03 02:19:15,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-11-03 02:19:15,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-11-03 02:19:15,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:19:15,588 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:15,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:15,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1557340421, now seen corresponding path program 2 times [2022-11-03 02:19:15,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:19:15,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631556878] [2022-11-03 02:19:15,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:19:15,589 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:19:15,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:19:15,590 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:19:15,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-03 02:19:15,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:19:15,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:19:15,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 02:19:15,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:17,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:20,349 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:19:20,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631556878] [2022-11-03 02:19:20,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631556878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:20,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1224897913] [2022-11-03 02:19:20,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:19:20,349 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:19:20,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:19:20,350 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:19:20,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-11-03 02:19:20,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:19:20,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:19:20,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-03 02:19:20,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:25,517 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 02:19:25,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:35,417 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 02:19:35,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1224897913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:35,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221735107] [2022-11-03 02:19:35,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:19:35,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:35,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:35,420 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:35,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-03 02:19:35,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:19:35,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:19:35,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-03 02:19:35,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:36,431 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 02:19:36,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:37,246 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 02:19:37,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221735107] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:37,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:19:37,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 28, 28, 28, 28] total 83 [2022-11-03 02:19:37,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990504842] [2022-11-03 02:19:37,248 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:37,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-03 02:19:37,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:19:37,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-03 02:19:37,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=6364, Unknown=0, NotChecked=0, Total=6806 [2022-11-03 02:19:37,252 INFO L87 Difference]: Start difference. First operand 293 states and 355 transitions. Second operand has 83 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 83 states have internal predecessors, (162), 0 states have call successors, (0), 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 02:20:25,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:20:25,062 INFO L93 Difference]: Finished difference Result 668 states and 838 transitions. [2022-11-03 02:20:25,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-03 02:20:25,069 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 83 states have internal predecessors, (162), 0 states have call successors, (0), 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 02:20:25,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:20:25,071 INFO L225 Difference]: With dead ends: 668 [2022-11-03 02:20:25,071 INFO L226 Difference]: Without dead ends: 500 [2022-11-03 02:20:25,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 176 SyntacticMatches, 7 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5434 ImplicationChecksByTransitivity, 63.5s TimeCoverageRelationStatistics Valid=1876, Invalid=23246, Unknown=0, NotChecked=0, Total=25122 [2022-11-03 02:20:25,075 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 385 mSDsluCounter, 1809 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 1841 SdHoareTripleChecker+Invalid, 2185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1560 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:20:25,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 1841 Invalid, 2185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 597 Invalid, 0 Unknown, 1560 Unchecked, 1.2s Time] [2022-11-03 02:20:25,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-11-03 02:20:25,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 405. [2022-11-03 02:20:25,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.2277227722772277) internal successors, (496), 404 states have internal predecessors, (496), 0 states have call successors, (0), 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 02:20:25,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 496 transitions. [2022-11-03 02:20:25,141 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 496 transitions. Word has length 44 [2022-11-03 02:20:25,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:20:25,142 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 496 transitions. [2022-11-03 02:20:25,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 83 states have internal predecessors, (162), 0 states have call successors, (0), 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 02:20:25,142 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 496 transitions. [2022-11-03 02:20:25,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:20:25,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:20:25,143 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 02:20:25,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:25,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Ended with exit code 0 [2022-11-03 02:20:25,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:25,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:20:25,758 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:20:25,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:20:25,758 INFO L85 PathProgramCache]: Analyzing trace with hash 261554935, now seen corresponding path program 3 times [2022-11-03 02:20:25,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:20:25,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813026148] [2022-11-03 02:20:25,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:20:25,759 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:20:25,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:20:25,760 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:20:25,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 02:20:25,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:20:25,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:20:25,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-03 02:20:25,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:20:27,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:20:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:20:33,049 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:20:33,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813026148] [2022-11-03 02:20:33,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813026148] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:20:33,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [259614790] [2022-11-03 02:20:33,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:20:33,050 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:20:33,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:20:33,051 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:20:33,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-11-03 02:20:33,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:20:33,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:20:33,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-03 02:20:33,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:20:34,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:20:40,407 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:20:40,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [259614790] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:20:40,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636791152] [2022-11-03 02:20:40,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:20:40,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:20:40,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:20:40,413 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:20:40,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-03 02:20:40,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:20:40,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:20:40,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 02:20:40,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:20:42,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:20:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:20:44,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636791152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:20:44,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:20:44,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 13, 21, 12, 12] total 51 [2022-11-03 02:20:44,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361808172] [2022-11-03 02:20:44,651 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:20:44,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-03 02:20:44,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:20:44,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-03 02:20:44,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=2207, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 02:20:44,653 INFO L87 Difference]: Start difference. First operand 405 states and 496 transitions. Second operand has 51 states, 51 states have (on average 2.843137254901961) internal successors, (145), 51 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 02:20:48,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:20:48,115 INFO L93 Difference]: Finished difference Result 670 states and 840 transitions. [2022-11-03 02:20:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-03 02:20:48,116 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.843137254901961) internal successors, (145), 51 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 02:20:48,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:20:48,118 INFO L225 Difference]: With dead ends: 670 [2022-11-03 02:20:48,119 INFO L226 Difference]: Without dead ends: 525 [2022-11-03 02:20:48,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 212 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=805, Invalid=4165, Unknown=0, NotChecked=0, Total=4970 [2022-11-03 02:20:48,120 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 168 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:20:48,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 466 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 263 Unchecked, 0.1s Time] [2022-11-03 02:20:48,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-11-03 02:20:48,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 495. [2022-11-03 02:20:48,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 1.2044534412955465) internal successors, (595), 494 states have internal predecessors, (595), 0 states have call successors, (0), 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 02:20:48,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 595 transitions. [2022-11-03 02:20:48,220 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 595 transitions. Word has length 44 [2022-11-03 02:20:48,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:20:48,221 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 595 transitions. [2022-11-03 02:20:48,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.843137254901961) internal successors, (145), 51 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 02:20:48,221 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 595 transitions. [2022-11-03 02:20:48,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:20:48,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:20:48,222 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 02:20:48,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (67)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:48,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:48,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:48,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:20:48,826 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:20:48,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:20:48,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1494575887, now seen corresponding path program 7 times [2022-11-03 02:20:48,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:20:48,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993868177] [2022-11-03 02:20:48,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:20:48,827 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:20:48,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:20:48,828 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:20:48,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 02:20:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:48,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-03 02:20:48,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:52,973 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 02:20:52,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:02,961 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 02:21:02,962 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:21:02,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993868177] [2022-11-03 02:21:02,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993868177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:02,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [673198319] [2022-11-03 02:21:02,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:21:02,962 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:21:02,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:21:02,967 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:21:02,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-03 02:21:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:03,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-03 02:21:03,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:04,259 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 02:21:04,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:05,023 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 02:21:05,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [673198319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:05,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284722104] [2022-11-03 02:21:05,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:21:05,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:05,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:05,025 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:05,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-03 02:21:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:05,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-03 02:21:05,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:06,502 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 02:21:06,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:07,844 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 02:21:07,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284722104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:07,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:21:07,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33, 33, 34, 34] total 66 [2022-11-03 02:21:07,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807113279] [2022-11-03 02:21:07,845 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:07,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-03 02:21:07,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:21:07,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-03 02:21:07,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=3851, Unknown=0, NotChecked=0, Total=4290 [2022-11-03 02:21:07,847 INFO L87 Difference]: Start difference. First operand 495 states and 595 transitions. Second operand has 66 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 66 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 02:21:35,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:35,145 INFO L93 Difference]: Finished difference Result 569 states and 680 transitions. [2022-11-03 02:21:35,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-03 02:21:35,145 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 66 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 02:21:35,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:35,147 INFO L225 Difference]: With dead ends: 569 [2022-11-03 02:21:35,147 INFO L226 Difference]: Without dead ends: 567 [2022-11-03 02:21:35,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 194 SyntacticMatches, 2 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 38.9s TimeCoverageRelationStatistics Valid=1709, Invalid=15583, Unknown=0, NotChecked=0, Total=17292 [2022-11-03 02:21:35,151 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 344 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1140 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:35,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 931 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 835 Invalid, 0 Unknown, 1140 Unchecked, 1.7s Time] [2022-11-03 02:21:35,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-11-03 02:21:35,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 534. [2022-11-03 02:21:35,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 1.200750469043152) internal successors, (640), 533 states have internal predecessors, (640), 0 states have call successors, (0), 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 02:21:35,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 640 transitions. [2022-11-03 02:21:35,230 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 640 transitions. Word has length 44 [2022-11-03 02:21:35,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:35,230 INFO L495 AbstractCegarLoop]: Abstraction has 534 states and 640 transitions. [2022-11-03 02:21:35,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 66 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 02:21:35,231 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 640 transitions. [2022-11-03 02:21:35,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 02:21:35,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:35,232 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 02:21:35,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:35,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:35,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:35,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:35,841 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:21:35,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:35,841 INFO L85 PathProgramCache]: Analyzing trace with hash -721461745, now seen corresponding path program 3 times [2022-11-03 02:21:35,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:21:35,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002474823] [2022-11-03 02:21:35,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:21:35,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:21:35,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:21:35,843 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:21:35,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-03 02:21:35,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:21:35,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:21:35,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:21:35,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:36,584 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 02:21:36,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 02:21:36,864 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:21:36,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002474823] [2022-11-03 02:21:36,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002474823] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:21:36,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:21:36,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-03 02:21:36,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750079645] [2022-11-03 02:21:36,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:21:36,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:21:36,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:21:36,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:21:36,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:21:36,866 INFO L87 Difference]: Start difference. First operand 534 states and 640 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 02:21:37,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:37,077 INFO L93 Difference]: Finished difference Result 1035 states and 1269 transitions. [2022-11-03 02:21:37,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:21:37,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 02:21:37,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:37,080 INFO L225 Difference]: With dead ends: 1035 [2022-11-03 02:21:37,080 INFO L226 Difference]: Without dead ends: 738 [2022-11-03 02:21:37,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:21:37,081 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 76 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:37,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 54 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:21:37,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2022-11-03 02:21:37,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 532. [2022-11-03 02:21:37,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 1.167608286252354) internal successors, (620), 531 states have internal predecessors, (620), 0 states have call successors, (0), 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 02:21:37,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 620 transitions. [2022-11-03 02:21:37,177 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 620 transitions. Word has length 57 [2022-11-03 02:21:37,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:37,177 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 620 transitions. [2022-11-03 02:21:37,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 02:21:37,178 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 620 transitions. [2022-11-03 02:21:37,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 02:21:37,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:37,179 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 02:21:37,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:37,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:21:37,380 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:21:37,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:37,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1308267759, now seen corresponding path program 1 times [2022-11-03 02:21:37,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:21:37,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678096496] [2022-11-03 02:21:37,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:37,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:21:37,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:21:37,382 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:21:37,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-03 02:21:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:37,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-03 02:21:37,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:39,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:43,135 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:21:43,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678096496] [2022-11-03 02:21:43,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678096496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:43,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [886182516] [2022-11-03 02:21:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:43,136 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:21:43,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:21:43,137 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:21:43,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2022-11-03 02:21:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:43,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-03 02:21:43,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:44,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:45,137 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:45,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [886182516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:45,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036518694] [2022-11-03 02:21:45,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:45,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:45,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:45,138 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:45,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-03 02:21:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:45,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-03 02:21:45,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:46,450 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 17 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:46,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 17 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:47,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036518694] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:47,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:21:47,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 19, 19] total 38 [2022-11-03 02:21:47,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515352171] [2022-11-03 02:21:47,250 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:47,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 02:21:47,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:21:47,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 02:21:47,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1183, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:21:47,251 INFO L87 Difference]: Start difference. First operand 532 states and 620 transitions. Second operand has 38 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 38 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:01,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:01,549 INFO L93 Difference]: Finished difference Result 1037 states and 1228 transitions. [2022-11-03 02:22:01,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-03 02:22:01,550 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 38 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-03 02:22:01,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:01,551 INFO L225 Difference]: With dead ends: 1037 [2022-11-03 02:22:01,551 INFO L226 Difference]: Without dead ends: 899 [2022-11-03 02:22:01,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 310 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=1308, Invalid=7064, Unknown=0, NotChecked=0, Total=8372 [2022-11-03 02:22:01,553 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 449 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 844 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:01,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 938 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 384 Invalid, 0 Unknown, 844 Unchecked, 0.9s Time] [2022-11-03 02:22:01,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-11-03 02:22:01,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 637. [2022-11-03 02:22:01,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 1.1572327044025157) internal successors, (736), 636 states have internal predecessors, (736), 0 states have call successors, (0), 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 02:22:01,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 736 transitions. [2022-11-03 02:22:01,675 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 736 transitions. Word has length 57 [2022-11-03 02:22:01,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:01,675 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 736 transitions. [2022-11-03 02:22:01,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 38 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:01,676 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 736 transitions. [2022-11-03 02:22:01,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 02:22:01,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:01,677 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-03 02:22:01,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:01,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:02,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (74)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:02,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:22:02,291 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:02,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:02,292 INFO L85 PathProgramCache]: Analyzing trace with hash -677856377, now seen corresponding path program 4 times [2022-11-03 02:22:02,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:22:02,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584287339] [2022-11-03 02:22:02,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:22:02,292 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:22:02,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:22:02,293 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:22:02,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-03 02:22:02,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:22:02,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:22:02,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-03 02:22:02,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:05,655 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 29 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:22:05,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:22:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 29 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:22:11,667 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:22:11,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584287339] [2022-11-03 02:22:11,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584287339] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:22:11,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [85519095] [2022-11-03 02:22:11,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:22:11,667 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:22:11,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:22:11,673 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:22:11,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2022-11-03 02:22:11,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:22:11,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:22:12,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-03 02:22:12,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 29 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:22:12,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:22:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 29 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:22:13,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [85519095] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:22:13,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709707611] [2022-11-03 02:22:13,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:22:13,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:13,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:13,124 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:13,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-11-03 02:22:13,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:22:13,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:22:13,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 02:22:13,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:16,137 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:22:16,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:22:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 29 proven. 44 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:22:20,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709707611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:22:20,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:22:20,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 30, 14, 15] total 76 [2022-11-03 02:22:20,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198497992] [2022-11-03 02:22:20,147 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:22:20,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-03 02:22:20,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:22:20,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-03 02:22:20,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=5336, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 02:22:20,149 INFO L87 Difference]: Start difference. First operand 637 states and 736 transitions. Second operand has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 76 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:23:17,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:23:17,852 INFO L93 Difference]: Finished difference Result 1141 states and 1334 transitions. [2022-11-03 02:23:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-11-03 02:23:17,852 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 76 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-03 02:23:17,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:23:17,854 INFO L225 Difference]: With dead ends: 1141 [2022-11-03 02:23:17,854 INFO L226 Difference]: Without dead ends: 1072 [2022-11-03 02:23:17,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 280 SyntacticMatches, 2 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9024 ImplicationChecksByTransitivity, 66.5s TimeCoverageRelationStatistics Valid=5705, Invalid=33301, Unknown=0, NotChecked=0, Total=39006 [2022-11-03 02:23:17,859 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 787 mSDsluCounter, 1720 mSDsCounter, 0 mSdLazyCounter, 1807 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 3540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 1807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1399 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:23:17,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 1751 Invalid, 3540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 1807 Invalid, 0 Unknown, 1399 Unchecked, 4.6s Time] [2022-11-03 02:23:17,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2022-11-03 02:23:17,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 741. [2022-11-03 02:23:17,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 1.162162162162162) internal successors, (860), 740 states have internal predecessors, (860), 0 states have call successors, (0), 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 02:23:17,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 860 transitions. [2022-11-03 02:23:17,981 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 860 transitions. Word has length 57 [2022-11-03 02:23:17,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:23:17,982 INFO L495 AbstractCegarLoop]: Abstraction has 741 states and 860 transitions. [2022-11-03 02:23:17,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 76 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:23:17,982 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 860 transitions. [2022-11-03 02:23:17,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 02:23:17,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:23:17,983 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:23:18,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-11-03 02:23:18,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-03 02:23:18,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (77)] Forceful destruction successful, exit code 0 [2022-11-03 02:23:18,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:23:18,599 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:23:18,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:23:18,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1211409549, now seen corresponding path program 2 times [2022-11-03 02:23:18,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:23:18,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412060365] [2022-11-03 02:23:18,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:23:18,601 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:23:18,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:23:18,601 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:23:18,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-03 02:23:18,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:23:18,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:23:18,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-03 02:23:18,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:23:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:23:21,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:23:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:23:26,036 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:23:26,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412060365] [2022-11-03 02:23:26,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412060365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:23:26,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [676261968] [2022-11-03 02:23:26,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:23:26,037 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:23:26,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:23:26,038 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:23:26,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2022-11-03 02:23:26,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:23:26,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:23:26,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-03 02:23:26,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:23:27,225 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:23:27,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:23:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:23:27,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [676261968] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:23:27,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567327323] [2022-11-03 02:23:27,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:23:27,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:23:27,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:23:27,917 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:23:27,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-11-03 02:23:28,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:23:28,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:23:28,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-03 02:23:28,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:23:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 17 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:23:29,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:23:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 17 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:23:30,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567327323] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:23:30,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:23:30,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22, 22, 22, 22] total 44 [2022-11-03 02:23:30,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066992045] [2022-11-03 02:23:30,140 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:23:30,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 02:23:30,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:23:30,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 02:23:30,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1765, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 02:23:30,142 INFO L87 Difference]: Start difference. First operand 741 states and 860 transitions. Second operand has 44 states, 44 states have (on average 2.659090909090909) internal successors, (117), 44 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:23:43,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:23:43,735 INFO L93 Difference]: Finished difference Result 1065 states and 1251 transitions. [2022-11-03 02:23:43,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-03 02:23:43,736 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.659090909090909) internal successors, (117), 44 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-03 02:23:43,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:23:43,738 INFO L225 Difference]: With dead ends: 1065 [2022-11-03 02:23:43,738 INFO L226 Difference]: Without dead ends: 975 [2022-11-03 02:23:43,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 294 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1659 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=801, Invalid=8705, Unknown=0, NotChecked=0, Total=9506 [2022-11-03 02:23:43,739 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 220 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 1510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1164 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:23:43,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 653 Invalid, 1510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 319 Invalid, 0 Unknown, 1164 Unchecked, 0.8s Time] [2022-11-03 02:23:43,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-11-03 02:23:43,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 739. [2022-11-03 02:23:43,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 1.1598915989159893) internal successors, (856), 738 states have internal predecessors, (856), 0 states have call successors, (0), 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 02:23:43,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 856 transitions. [2022-11-03 02:23:43,857 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 856 transitions. Word has length 57 [2022-11-03 02:23:43,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:23:43,858 INFO L495 AbstractCegarLoop]: Abstraction has 739 states and 856 transitions. [2022-11-03 02:23:43,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.659090909090909) internal successors, (117), 44 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:23:43,858 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 856 transitions. [2022-11-03 02:23:43,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 02:23:43,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:23:43,859 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-03 02:23:43,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2022-11-03 02:23:44,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (80)] Forceful destruction successful, exit code 0 [2022-11-03 02:23:44,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-11-03 02:23:44,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:23:44,466 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:23:44,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:23:44,466 INFO L85 PathProgramCache]: Analyzing trace with hash 974187149, now seen corresponding path program 8 times [2022-11-03 02:23:44,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:23:44,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243426190] [2022-11-03 02:23:44,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:23:44,467 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:23:44,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:23:44,467 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:23:44,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-03 02:23:44,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:23:44,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:23:44,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 129 conjunts are in the unsatisfiable core [2022-11-03 02:23:44,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:23:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:23:50,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:24:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:24:04,357 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:24:04,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243426190] [2022-11-03 02:24:04,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243426190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:24:04,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [885225543] [2022-11-03 02:24:04,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:24:04,357 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:24:04,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:24:04,358 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:24:04,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (83)] Waiting until timeout for monitored process [2022-11-03 02:24:04,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:24:04,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:24:04,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 129 conjunts are in the unsatisfiable core [2022-11-03 02:24:04,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:24:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:24:06,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:24:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:24:07,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [885225543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:24:07,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421345520] [2022-11-03 02:24:07,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:24:07,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:24:07,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:24:07,252 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:24:07,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-11-03 02:24:07,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:24:07,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:24:07,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 129 conjunts are in the unsatisfiable core [2022-11-03 02:24:07,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:24:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:24:08,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:24:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:24:09,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421345520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:24:09,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:24:09,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36, 36, 36, 36] total 70 [2022-11-03 02:24:09,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895350499] [2022-11-03 02:24:09,989 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:24:09,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-03 02:24:09,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:24:09,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-03 02:24:09,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=4349, Unknown=0, NotChecked=0, Total=4830 [2022-11-03 02:24:09,990 INFO L87 Difference]: Start difference. First operand 739 states and 856 transitions. Second operand has 70 states, 70 states have (on average 1.6) internal successors, (112), 70 states have internal predecessors, (112), 0 states have call successors, (0), 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 02:24:36,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:24:36,866 INFO L93 Difference]: Finished difference Result 847 states and 979 transitions. [2022-11-03 02:24:36,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-11-03 02:24:36,867 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.6) internal successors, (112), 70 states have internal predecessors, (112), 0 states have call successors, (0), 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 02:24:36,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:24:36,870 INFO L225 Difference]: With dead ends: 847 [2022-11-03 02:24:36,870 INFO L226 Difference]: Without dead ends: 845 [2022-11-03 02:24:36,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 271 SyntacticMatches, 4 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3014 ImplicationChecksByTransitivity, 42.8s TimeCoverageRelationStatistics Valid=2085, Invalid=16547, Unknown=0, NotChecked=0, Total=18632 [2022-11-03 02:24:36,872 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 483 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 2425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1620 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:24:36,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 1214 Invalid, 2425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 775 Invalid, 0 Unknown, 1620 Unchecked, 1.6s Time] [2022-11-03 02:24:36,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-11-03 02:24:36,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 766. [2022-11-03 02:24:36,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 1.1542483660130718) internal successors, (883), 765 states have internal predecessors, (883), 0 states have call successors, (0), 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 02:24:36,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 883 transitions. [2022-11-03 02:24:36,981 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 883 transitions. Word has length 57 [2022-11-03 02:24:36,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:24:36,981 INFO L495 AbstractCegarLoop]: Abstraction has 766 states and 883 transitions. [2022-11-03 02:24:36,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.6) internal successors, (112), 70 states have internal predecessors, (112), 0 states have call successors, (0), 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 02:24:36,981 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 883 transitions. [2022-11-03 02:24:36,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 02:24:36,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:24:36,982 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-03 02:24:37,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-11-03 02:24:37,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (83)] Forceful destruction successful, exit code 0 [2022-11-03 02:24:37,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-03 02:24:37,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:24:37,584 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:24:37,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:24:37,584 INFO L85 PathProgramCache]: Analyzing trace with hash -801102839, now seen corresponding path program 9 times [2022-11-03 02:24:37,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:24:37,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485694974] [2022-11-03 02:24:37,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:24:37,585 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:24:37,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:24:37,586 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:24:37,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-03 02:24:37,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:24:37,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:24:37,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-03 02:24:37,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:24:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:24:39,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:24:42,804 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:24:42,804 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:24:42,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485694974] [2022-11-03 02:24:42,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485694974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:24:42,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1890795753] [2022-11-03 02:24:42,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:24:42,804 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:24:42,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:24:42,806 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:24:42,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (86)] Waiting until timeout for monitored process [2022-11-03 02:24:43,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:24:43,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:24:43,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-03 02:24:43,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:24:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:24:44,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:24:45,378 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:24:45,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1890795753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:24:45,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863649585] [2022-11-03 02:24:45,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:24:45,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:24:45,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:24:45,379 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:24:45,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-11-03 02:24:45,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:24:45,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:24:45,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-03 02:24:45,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:24:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:24:47,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:24:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:24:49,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863649585] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:24:49,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:24:49,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 15, 15] total 42 [2022-11-03 02:24:49,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752649267] [2022-11-03 02:24:49,872 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:24:49,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 02:24:49,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:24:49,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 02:24:49,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1592, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 02:24:49,873 INFO L87 Difference]: Start difference. First operand 766 states and 883 transitions. Second operand has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 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 02:24:53,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:24:53,905 INFO L93 Difference]: Finished difference Result 980 states and 1136 transitions. [2022-11-03 02:24:53,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:24:53,905 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 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 02:24:53,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:24:53,909 INFO L225 Difference]: With dead ends: 980 [2022-11-03 02:24:53,909 INFO L226 Difference]: Without dead ends: 978 [2022-11-03 02:24:53,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 291 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=300, Invalid=2670, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 02:24:53,910 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:24:53,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 475 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 236 Unchecked, 0.0s Time] [2022-11-03 02:24:53,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-11-03 02:24:54,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 794. [2022-11-03 02:24:54,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 1.1639344262295082) internal successors, (923), 793 states have internal predecessors, (923), 0 states have call successors, (0), 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 02:24:54,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 923 transitions. [2022-11-03 02:24:54,046 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 923 transitions. Word has length 57 [2022-11-03 02:24:54,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:24:54,046 INFO L495 AbstractCegarLoop]: Abstraction has 794 states and 923 transitions. [2022-11-03 02:24:54,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 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 02:24:54,046 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 923 transitions. [2022-11-03 02:24:54,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 02:24:54,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:24:54,047 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 02:24:54,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (86)] Forceful destruction successful, exit code 0 [2022-11-03 02:24:54,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-11-03 02:24:54,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-11-03 02:24:54,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:24:54,648 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:24:54,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:24:54,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1069003921, now seen corresponding path program 3 times [2022-11-03 02:24:54,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:24:54,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950651159] [2022-11-03 02:24:54,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:24:54,649 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:24:54,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:24:54,650 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:24:54,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-03 02:24:54,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 02:24:54,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:24:54,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-03 02:24:54,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:24:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:24:57,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:25:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:03,941 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:25:03,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950651159] [2022-11-03 02:25:03,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950651159] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:25:03,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [756132395] [2022-11-03 02:25:03,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:25:03,941 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:25:03,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:25:03,942 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:25:03,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2022-11-03 02:25:04,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 02:25:04,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:25:04,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-03 02:25:04,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:05,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:25:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:05,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [756132395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:25:05,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718196532] [2022-11-03 02:25:05,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:25:05,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:05,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:05,874 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:05,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_983416e2-0bdc-4013-8bdd-08500eed6c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-11-03 02:25:06,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 02:25:06,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:25:06,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-03 02:25:06,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 17 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:07,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:25:08,000 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 17 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:08,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718196532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:25:08,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:25:08,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 25, 25, 25] total 50 [2022-11-03 02:25:08,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099386375] [2022-11-03 02:25:08,000 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:25:08,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-03 02:25:08,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:25:08,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-03 02:25:08,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 02:25:08,002 INFO L87 Difference]: Start difference. First operand 794 states and 923 transitions. Second operand has 50 states, 50 states have (on average 2.34) internal successors, (117), 50 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)