./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p13.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_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/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_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/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_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/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 9bc94cc4f04f42a02c430702607b95c2238394c1df663fb93b573f51c6467ee0 --- 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 02:53:13,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:53:13,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:53:13,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:53:13,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:53:13,539 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:53:13,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:53:13,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:53:13,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:53:13,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:53:13,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:53:13,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:53:13,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:53:13,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:53:13,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:53:13,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:53:13,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:53:13,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:53:13,565 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:53:13,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:53:13,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:53:13,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:53:13,580 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:53:13,581 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:53:13,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:53:13,589 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:53:13,590 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:53:13,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:53:13,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:53:13,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:53:13,594 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:53:13,595 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:53:13,597 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:53:13,598 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:53:13,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:53:13,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:53:13,600 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:53:13,600 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:53:13,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:53:13,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:53:13,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:53:13,603 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:53:13,643 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:53:13,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:53:13,644 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:53:13,644 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:53:13,645 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:53:13,645 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:53:13,645 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:53:13,645 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:53:13,646 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:53:13,646 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:53:13,647 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:53:13,647 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:53:13,647 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:53:13,647 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:53:13,648 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:53:13,648 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:53:13,648 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:53:13,648 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:53:13,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:53:13,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:53:13,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:53:13,650 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:53:13,650 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:53:13,650 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:53:13,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:53:13,650 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:53:13,651 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:53:13,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:53:13,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:53:13,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:53:13,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:53:13,652 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:53:13,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:53:13,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:53:13,653 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:53:13,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:53:13,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:53:13,653 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:53:13,653 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_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9bc94cc4f04f42a02c430702607b95c2238394c1df663fb93b573f51c6467ee0 [2022-11-03 02:53:13,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:53:13,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:53:13,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:53:13,945 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:53:13,946 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:53:13,947 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p13.c [2022-11-03 02:53:14,024 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/data/abbd331ef/548bf5d4c2384ed08b940fcd26703ea0/FLAG5dadb042e [2022-11-03 02:53:14,527 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:53:14,541 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p13.c [2022-11-03 02:53:14,553 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/data/abbd331ef/548bf5d4c2384ed08b940fcd26703ea0/FLAG5dadb042e [2022-11-03 02:53:14,860 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/data/abbd331ef/548bf5d4c2384ed08b940fcd26703ea0 [2022-11-03 02:53:14,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:53:14,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:53:14,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:53:14,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:53:14,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:53:14,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:53:14" (1/1) ... [2022-11-03 02:53:14,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39b33e3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:14, skipping insertion in model container [2022-11-03 02:53:14,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:53:14" (1/1) ... [2022-11-03 02:53:14,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:53:14,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:53:15,174 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_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p13.c[1107,1120] [2022-11-03 02:53:15,461 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:53:15,464 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:53:15,475 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_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p13.c[1107,1120] [2022-11-03 02:53:15,596 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:53:15,608 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:53:15,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:15 WrapperNode [2022-11-03 02:53:15,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:53:15,615 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:53:15,616 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:53:15,616 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:53:15,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:15" (1/1) ... [2022-11-03 02:53:15,670 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:15" (1/1) ... [2022-11-03 02:53:15,804 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1396 [2022-11-03 02:53:15,804 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:53:15,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:53:15,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:53:15,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:53:15,815 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:15" (1/1) ... [2022-11-03 02:53:15,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:15" (1/1) ... [2022-11-03 02:53:15,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:15" (1/1) ... [2022-11-03 02:53:15,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:15" (1/1) ... [2022-11-03 02:53:15,880 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:15" (1/1) ... [2022-11-03 02:53:15,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:15" (1/1) ... [2022-11-03 02:53:15,895 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:15" (1/1) ... [2022-11-03 02:53:15,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:15" (1/1) ... [2022-11-03 02:53:15,918 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:53:15,919 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:53:15,919 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:53:15,919 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:53:15,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:15" (1/1) ... [2022-11-03 02:53:15,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:53:15,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:15,971 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:53:15,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:53:16,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:53:16,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:53:16,392 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:53:16,394 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:53:17,818 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:53:21,303 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:53:21,303 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:53:21,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:53:21 BoogieIcfgContainer [2022-11-03 02:53:21,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:53:21,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:53:21,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:53:21,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:53:21,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:53:14" (1/3) ... [2022-11-03 02:53:21,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3110b25e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:53:21, skipping insertion in model container [2022-11-03 02:53:21,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:15" (2/3) ... [2022-11-03 02:53:21,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3110b25e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:53:21, skipping insertion in model container [2022-11-03 02:53:21,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:53:21" (3/3) ... [2022-11-03 02:53:21,316 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_arrays_vsaR_p13.c [2022-11-03 02:53:21,338 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:53:21,338 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:53:21,400 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:53:21,418 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;@54df04e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:53:21,419 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:53:21,423 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 02:53:21,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:53:21,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:21,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:53:21,433 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:21,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:21,440 INFO L85 PathProgramCache]: Analyzing trace with hash 19940207, now seen corresponding path program 1 times [2022-11-03 02:53:21,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:21,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597273024] [2022-11-03 02:53:21,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:21,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:53:21,878 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:53:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:53:22,169 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:53:22,171 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:53:22,172 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:53:22,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:53:22,179 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:53:22,184 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:53:22,221 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:53:22,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:53:22 BoogieIcfgContainer [2022-11-03 02:53:22,238 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:53:22,240 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:53:22,241 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:53:22,241 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:53:22,242 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:53:21" (3/4) ... [2022-11-03 02:53:22,245 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:53:22,245 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:53:22,248 INFO L158 Benchmark]: Toolchain (without parser) took 7380.99ms. Allocated memory was 142.6MB in the beginning and 457.2MB in the end (delta: 314.6MB). Free memory was 106.2MB in the beginning and 278.8MB in the end (delta: -172.6MB). Peak memory consumption was 141.5MB. Max. memory is 16.1GB. [2022-11-03 02:53:22,249 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 98.6MB. Free memory was 53.8MB in the beginning and 53.7MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:53:22,250 INFO L158 Benchmark]: CACSL2BoogieTranslator took 743.18ms. Allocated memory is still 142.6MB. Free memory was 106.0MB in the beginning and 89.7MB in the end (delta: 16.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-03 02:53:22,250 INFO L158 Benchmark]: Boogie Procedure Inliner took 188.87ms. Allocated memory is still 142.6MB. Free memory was 89.7MB in the beginning and 72.3MB in the end (delta: 17.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-03 02:53:22,256 INFO L158 Benchmark]: Boogie Preprocessor took 113.27ms. Allocated memory is still 142.6MB. Free memory was 72.3MB in the beginning and 63.2MB in the end (delta: 9.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 02:53:22,256 INFO L158 Benchmark]: RCFGBuilder took 5387.98ms. Allocated memory was 142.6MB in the beginning and 457.2MB in the end (delta: 314.6MB). Free memory was 63.2MB in the beginning and 333.3MB in the end (delta: -270.1MB). Peak memory consumption was 247.5MB. Max. memory is 16.1GB. [2022-11-03 02:53:22,258 INFO L158 Benchmark]: TraceAbstraction took 929.46ms. Allocated memory is still 457.2MB. Free memory was 333.3MB in the beginning and 278.8MB in the end (delta: 54.5MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. [2022-11-03 02:53:22,258 INFO L158 Benchmark]: Witness Printer took 5.81ms. Allocated memory is still 457.2MB. Free memory is still 278.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:53:22,266 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 98.6MB. Free memory was 53.8MB in the beginning and 53.7MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 743.18ms. Allocated memory is still 142.6MB. Free memory was 106.0MB in the beginning and 89.7MB in the end (delta: 16.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 188.87ms. Allocated memory is still 142.6MB. Free memory was 89.7MB in the beginning and 72.3MB in the end (delta: 17.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 113.27ms. Allocated memory is still 142.6MB. Free memory was 72.3MB in the beginning and 63.2MB in the end (delta: 9.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * RCFGBuilder took 5387.98ms. Allocated memory was 142.6MB in the beginning and 457.2MB in the end (delta: 314.6MB). Free memory was 63.2MB in the beginning and 333.3MB in the end (delta: -270.1MB). Peak memory consumption was 247.5MB. Max. memory is 16.1GB. * TraceAbstraction took 929.46ms. Allocated memory is still 457.2MB. Free memory was 333.3MB in the beginning and 278.8MB in the end (delta: 54.5MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. * Witness Printer took 5.81ms. Allocated memory is still 457.2MB. Free memory is still 278.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 163, overapproximation of bitwiseOr at line 176, overapproximation of bitwiseAnd at line 149. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 5); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (5 - 1); [L31] const SORT_5 mask_SORT_5 = (SORT_5)-1 >> (sizeof(SORT_5) * 8 - 12); [L32] const SORT_5 msb_SORT_5 = (SORT_5)1 << (12 - 1); [L34] const SORT_7 mask_SORT_7 = (SORT_7)-1 >> (sizeof(SORT_7) * 8 - 3); [L35] const SORT_7 msb_SORT_7 = (SORT_7)1 << (3 - 1); [L37] const SORT_80 mask_SORT_80 = (SORT_80)-1 >> (sizeof(SORT_80) * 8 - 32); [L38] const SORT_80 msb_SORT_80 = (SORT_80)1 << (32 - 1); [L40] const SORT_91 mask_SORT_91 = (SORT_91)-1 >> (sizeof(SORT_91) * 8 - 4); [L41] const SORT_91 msb_SORT_91 = (SORT_91)1 << (4 - 1); [L43] const SORT_176 mask_SORT_176 = (SORT_176)-1 >> (sizeof(SORT_176) * 8 - 2); [L44] const SORT_176 msb_SORT_176 = (SORT_176)1 << (2 - 1); [L46] const SORT_7 var_8 = 0; [L47] const SORT_5 var_12 = 0; [L48] const SORT_7 var_16 = 2; [L49] const SORT_1 var_19 = 0; [L50] const SORT_3 var_23 = 0; [L51] const SORT_1 var_39 = 1; [L52] const SORT_7 var_59 = 1; [L53] const SORT_7 var_64 = 4; [L54] const SORT_7 var_66 = 5; [L55] const SORT_7 var_70 = 3; [L56] const SORT_80 var_82 = 0; [L57] const SORT_7 var_108 = 7; [L58] const SORT_7 var_113 = 6; [L59] const SORT_3 var_140 = 2; [L60] const SORT_3 var_185 = 31; [L62] SORT_1 input_2; [L63] SORT_3 input_4; [L64] SORT_5 input_6; [L65] SORT_3 input_173; [L66] SORT_3 input_174; [L67] SORT_3 input_175; [L68] SORT_3 input_184; [L69] SORT_3 input_194; [L70] SORT_3 input_195; [L71] SORT_3 input_196; [L72] SORT_3 input_199; [L73] SORT_3 input_218; [L74] SORT_3 input_219; [L75] SORT_3 input_220; [L76] SORT_3 input_223; [L77] SORT_3 input_225; [L78] SORT_176 input_239; [L79] SORT_176 input_240; [L80] SORT_176 input_241; [L82] SORT_7 state_9 = __VERIFIER_nondet_uchar() & mask_SORT_7; [L83] SORT_5 state_13 = __VERIFIER_nondet_ushort() & mask_SORT_5; [L84] SORT_1 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L85] SORT_3 state_24 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L86] SORT_3 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L87] SORT_3 state_32 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L88] SORT_3 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L89] SORT_3 state_45 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L90] SORT_3 state_47 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L91] SORT_3 state_49 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L92] SORT_3 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L93] SORT_3 state_53 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L94] SORT_3 state_55 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L96] SORT_7 init_10_arg_1 = var_8; [L97] state_9 = init_10_arg_1 [L98] SORT_5 init_14_arg_1 = var_12; [L99] state_13 = init_14_arg_1 [L100] SORT_1 init_21_arg_1 = var_19; [L101] state_20 = init_21_arg_1 [L102] SORT_3 init_25_arg_1 = var_23; [L103] state_24 = init_25_arg_1 [L104] SORT_3 init_27_arg_1 = var_23; [L105] state_26 = init_27_arg_1 [L106] SORT_3 init_33_arg_1 = var_23; [L107] state_32 = init_33_arg_1 [L108] SORT_3 init_44_arg_1 = var_23; [L109] state_43 = init_44_arg_1 [L110] SORT_3 init_46_arg_1 = var_23; [L111] state_45 = init_46_arg_1 [L112] SORT_3 init_48_arg_1 = var_23; [L113] state_47 = init_48_arg_1 [L114] SORT_3 init_50_arg_1 = var_23; [L115] state_49 = init_50_arg_1 [L116] SORT_3 init_52_arg_1 = var_23; [L117] state_51 = init_52_arg_1 [L118] SORT_3 init_54_arg_1 = var_23; [L119] state_53 = init_54_arg_1 [L120] SORT_3 init_56_arg_1 = var_23; [L121] state_55 = init_56_arg_1 VAL [init_10_arg_1=0, init_14_arg_1=0, init_21_arg_1=0, init_25_arg_1=0, init_27_arg_1=0, init_33_arg_1=0, init_44_arg_1=0, init_46_arg_1=0, init_48_arg_1=0, init_50_arg_1=0, init_52_arg_1=0, init_54_arg_1=0, init_56_arg_1=0, mask_SORT_1=1, mask_SORT_176=3, mask_SORT_3=31, mask_SORT_5=4095, mask_SORT_7=7, mask_SORT_80=4294967295, mask_SORT_91=15, msb_SORT_1=1, msb_SORT_176=2, msb_SORT_3=16, msb_SORT_5=2048, msb_SORT_7=4, msb_SORT_80=2147483648, msb_SORT_91=8, state_13=0, state_20=0, state_24=0, state_26=0, state_32=0, state_43=0, state_45=0, state_47=0, state_49=0, state_51=0, state_53=0, state_55=0, state_9=0, var_108=7, var_113=6, var_12=0, var_140=2, var_16=2, var_185=31, var_19=0, var_23=0, var_39=1, var_59=1, var_64=4, var_66=5, var_70=3, var_8=0, var_82=0] [L124] input_2 = __VERIFIER_nondet_uchar() [L125] input_4 = __VERIFIER_nondet_uchar() [L126] input_6 = __VERIFIER_nondet_ushort() [L127] input_173 = __VERIFIER_nondet_uchar() [L128] input_174 = __VERIFIER_nondet_uchar() [L129] input_175 = __VERIFIER_nondet_uchar() [L130] input_184 = __VERIFIER_nondet_uchar() [L131] input_194 = __VERIFIER_nondet_uchar() [L132] input_195 = __VERIFIER_nondet_uchar() [L133] input_196 = __VERIFIER_nondet_uchar() [L134] input_199 = __VERIFIER_nondet_uchar() [L135] input_218 = __VERIFIER_nondet_uchar() [L136] input_219 = __VERIFIER_nondet_uchar() [L137] input_220 = __VERIFIER_nondet_uchar() [L138] input_223 = __VERIFIER_nondet_uchar() [L139] input_225 = __VERIFIER_nondet_uchar() [L140] input_239 = __VERIFIER_nondet_uchar() [L141] input_240 = __VERIFIER_nondet_uchar() [L142] input_241 = __VERIFIER_nondet_uchar() [L145] SORT_7 var_11_arg_0 = state_9; [L146] SORT_1 var_11 = var_11_arg_0 >> 2; [L147] SORT_5 var_15_arg_0 = state_13; [L148] SORT_7 var_15 = var_15_arg_0 >> 9; [L149] var_15 = var_15 & mask_SORT_7 [L150] SORT_7 var_17_arg_0 = var_15; [L151] SORT_7 var_17_arg_1 = var_16; [L152] SORT_1 var_17 = var_17_arg_0 == var_17_arg_1; [L153] SORT_1 var_18_arg_0 = var_11; [L154] SORT_1 var_18_arg_1 = var_17; [L155] SORT_1 var_18 = var_18_arg_0 & var_18_arg_1; [L156] SORT_1 var_22_arg_0 = var_18; [L157] SORT_1 var_22_arg_1 = state_20; [L158] SORT_1 var_22 = var_22_arg_0 & var_22_arg_1; [L159] SORT_3 var_28_arg_0 = state_24; [L160] SORT_3 var_28_arg_1 = state_26; [L161] SORT_1 var_28 = var_28_arg_0 == var_28_arg_1; [L162] SORT_1 var_29_arg_0 = var_28; [L163] SORT_1 var_29 = ~var_29_arg_0; [L164] SORT_1 var_30_arg_0 = var_22; [L165] SORT_1 var_30_arg_1 = var_29; [L166] SORT_1 var_30 = var_30_arg_0 & var_30_arg_1; [L167] SORT_1 var_31_arg_0 = var_30; [L168] SORT_1 var_31 = ~var_31_arg_0; [L169] SORT_3 var_34_arg_0 = state_32; [L170] SORT_3 var_34_arg_1 = state_26; [L171] SORT_1 var_34 = var_34_arg_0 == var_34_arg_1; [L172] SORT_1 var_35_arg_0 = var_34; [L173] SORT_1 var_35 = ~var_35_arg_0; [L174] SORT_1 var_36_arg_0 = var_31; [L175] SORT_1 var_36_arg_1 = var_35; [L176] SORT_1 var_36 = var_36_arg_0 | var_36_arg_1; [L177] SORT_1 var_40_arg_0 = var_36; [L178] SORT_1 var_40 = ~var_40_arg_0; [L179] SORT_1 var_41_arg_0 = var_39; [L180] SORT_1 var_41_arg_1 = var_40; [L181] SORT_1 var_41 = var_41_arg_0 & var_41_arg_1; [L182] var_41 = var_41 & mask_SORT_1 [L183] SORT_1 bad_42_arg_0 = var_41; [L184] CALL __VERIFIER_assert(!(bad_42_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: 0.8s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:53:22,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/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_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/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_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/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 9bc94cc4f04f42a02c430702607b95c2238394c1df663fb93b573f51c6467ee0 --- 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 02:53:24,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:53:24,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:53:24,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:53:24,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:53:24,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:53:24,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:53:24,787 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:53:24,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:53:24,796 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:53:24,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:53:24,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:53:24,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:53:24,808 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:53:24,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:53:24,811 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:53:24,812 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:53:24,813 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:53:24,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:53:24,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:53:24,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:53:24,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:53:24,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:53:24,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:53:24,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:53:24,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:53:24,841 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:53:24,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:53:24,842 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:53:24,843 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:53:24,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:53:24,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:53:24,844 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:53:24,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:53:24,846 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:53:24,846 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:53:24,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:53:24,859 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:53:24,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:53:24,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:53:24,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:53:24,863 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:53:24,904 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:53:24,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:53:24,906 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:53:24,906 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:53:24,907 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:53:24,908 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:53:24,908 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:53:24,908 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:53:24,908 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:53:24,909 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:53:24,910 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:53:24,910 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:53:24,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:53:24,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:53:24,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:53:24,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:53:24,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:53:24,913 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:53:24,913 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:53:24,913 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:53:24,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:53:24,914 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:53:24,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:53:24,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:53:24,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:53:24,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:53:24,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:53:24,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:53:24,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:53:24,915 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:53:24,916 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:53:24,916 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:53:24,916 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:53:24,916 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:53:24,917 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:53:24,917 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_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9bc94cc4f04f42a02c430702607b95c2238394c1df663fb93b573f51c6467ee0 [2022-11-03 02:53:25,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:53:25,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:53:25,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:53:25,269 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:53:25,270 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:53:25,271 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p13.c [2022-11-03 02:53:25,344 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/data/8110d95a1/51a54c16427447a3994e23a1bdaf6003/FLAG6d2c4f523 [2022-11-03 02:53:25,931 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:53:25,932 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p13.c [2022-11-03 02:53:25,947 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/data/8110d95a1/51a54c16427447a3994e23a1bdaf6003/FLAG6d2c4f523 [2022-11-03 02:53:26,186 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/data/8110d95a1/51a54c16427447a3994e23a1bdaf6003 [2022-11-03 02:53:26,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:53:26,191 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:53:26,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:53:26,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:53:26,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:53:26,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:53:26" (1/1) ... [2022-11-03 02:53:26,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@458979f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26, skipping insertion in model container [2022-11-03 02:53:26,202 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:53:26" (1/1) ... [2022-11-03 02:53:26,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:53:26,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:53:26,506 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_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p13.c[1107,1120] [2022-11-03 02:53:26,790 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:53:26,797 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:53:26,811 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_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p13.c[1107,1120] [2022-11-03 02:53:26,945 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:53:26,958 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:53:26,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26 WrapperNode [2022-11-03 02:53:26,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:53:26,959 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:53:26,960 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:53:26,960 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:53:26,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26" (1/1) ... [2022-11-03 02:53:27,012 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26" (1/1) ... [2022-11-03 02:53:27,112 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1396 [2022-11-03 02:53:27,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:53:27,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:53:27,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:53:27,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:53:27,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26" (1/1) ... [2022-11-03 02:53:27,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26" (1/1) ... [2022-11-03 02:53:27,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26" (1/1) ... [2022-11-03 02:53:27,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26" (1/1) ... [2022-11-03 02:53:27,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26" (1/1) ... [2022-11-03 02:53:27,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26" (1/1) ... [2022-11-03 02:53:27,252 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26" (1/1) ... [2022-11-03 02:53:27,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26" (1/1) ... [2022-11-03 02:53:27,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:53:27,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:53:27,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:53:27,282 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:53:27,283 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26" (1/1) ... [2022-11-03 02:53:27,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:53:27,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:27,315 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:53:27,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:53:27,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:53:27,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:53:27,656 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:53:27,669 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:53:28,788 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:53:28,797 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:53:28,798 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:53:28,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:53:28 BoogieIcfgContainer [2022-11-03 02:53:28,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:53:28,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:53:28,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:53:28,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:53:28,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:53:26" (1/3) ... [2022-11-03 02:53:28,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@443f23a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:53:28, skipping insertion in model container [2022-11-03 02:53:28,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:26" (2/3) ... [2022-11-03 02:53:28,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@443f23a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:53:28, skipping insertion in model container [2022-11-03 02:53:28,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:53:28" (3/3) ... [2022-11-03 02:53:28,810 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_arrays_vsaR_p13.c [2022-11-03 02:53:28,830 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:53:28,830 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:53:28,900 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:53:28,907 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;@14a1b464, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:53:28,908 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:53:28,913 INFO L276 IsEmpty]: Start isEmpty. Operand has 185 states, 183 states have (on average 1.4972677595628416) internal successors, (274), 184 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:28,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:53:28,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:28,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:53:28,920 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:28,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:28,926 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 02:53:28,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:28,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1027346312] [2022-11-03 02:53:28,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:28,940 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:28,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:28,948 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:28,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:53:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:29,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:53:29,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:29,369 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 02:53:29,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:29,371 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:29,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1027346312] [2022-11-03 02:53:29,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1027346312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:29,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:29,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:53:29,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482808665] [2022-11-03 02:53:29,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:29,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:53:29,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:29,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:53:29,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:53:29,411 INFO L87 Difference]: Start difference. First operand has 185 states, 183 states have (on average 1.4972677595628416) internal successors, (274), 184 states have internal predecessors, (274), 0 states have call successors, (0), 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 02:53:29,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:29,778 INFO L93 Difference]: Finished difference Result 542 states and 813 transitions. [2022-11-03 02:53:29,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:53:29,781 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 02:53:29,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:29,793 INFO L225 Difference]: With dead ends: 542 [2022-11-03 02:53:29,794 INFO L226 Difference]: Without dead ends: 359 [2022-11-03 02:53:29,797 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 02:53:29,804 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 525 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:29,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 736 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:53:29,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-11-03 02:53:29,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 183. [2022-11-03 02:53:29,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:29,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 270 transitions. [2022-11-03 02:53:29,851 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 270 transitions. Word has length 5 [2022-11-03 02:53:29,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:29,851 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 270 transitions. [2022-11-03 02:53:29,851 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 02:53:29,852 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 270 transitions. [2022-11-03 02:53:29,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:29,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:29,859 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:29,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:30,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:30,072 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:30,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:30,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1686520099, now seen corresponding path program 1 times [2022-11-03 02:53:30,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:30,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363548075] [2022-11-03 02:53:30,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:30,076 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:30,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:30,077 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:30,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:53:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:30,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:53:30,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:30,812 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 02:53:30,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:30,813 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:30,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363548075] [2022-11-03 02:53:30,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363548075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:30,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:30,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:53:30,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398297476] [2022-11-03 02:53:30,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:30,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:53:30,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:30,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:53:30,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:53:30,817 INFO L87 Difference]: Start difference. First operand 183 states and 270 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:31,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:31,014 INFO L93 Difference]: Finished difference Result 715 states and 1062 transitions. [2022-11-03 02:53:31,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:53:31,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:31,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:31,018 INFO L225 Difference]: With dead ends: 715 [2022-11-03 02:53:31,018 INFO L226 Difference]: Without dead ends: 536 [2022-11-03 02:53:31,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 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 02:53:31,021 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 783 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:31,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [783 Valid, 1005 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:53:31,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-11-03 02:53:31,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 185. [2022-11-03 02:53:31,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.4782608695652173) internal successors, (272), 184 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 272 transitions. [2022-11-03 02:53:31,036 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 272 transitions. Word has length 182 [2022-11-03 02:53:31,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:31,037 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 272 transitions. [2022-11-03 02:53:31,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:31,037 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 272 transitions. [2022-11-03 02:53:31,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:31,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:31,042 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:31,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:31,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:31,274 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:31,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:31,275 INFO L85 PathProgramCache]: Analyzing trace with hash -87371041, now seen corresponding path program 1 times [2022-11-03 02:53:31,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:31,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497964152] [2022-11-03 02:53:31,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:31,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:31,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:31,279 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:31,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:53:31,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:31,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:53:31,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:32,022 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 02:53:32,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:32,022 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:32,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497964152] [2022-11-03 02:53:32,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497964152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:32,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:32,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:53:32,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994468082] [2022-11-03 02:53:32,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:32,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:53:32,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:32,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:53:32,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:53:32,026 INFO L87 Difference]: Start difference. First operand 185 states and 272 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:32,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:32,176 INFO L93 Difference]: Finished difference Result 544 states and 805 transitions. [2022-11-03 02:53:32,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:53:32,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:32,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:32,179 INFO L225 Difference]: With dead ends: 544 [2022-11-03 02:53:32,179 INFO L226 Difference]: Without dead ends: 365 [2022-11-03 02:53:32,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 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 02:53:32,181 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 521 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:32,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 766 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:53:32,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-11-03 02:53:32,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 187. [2022-11-03 02:53:32,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.4731182795698925) internal successors, (274), 186 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:32,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 274 transitions. [2022-11-03 02:53:32,191 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 274 transitions. Word has length 182 [2022-11-03 02:53:32,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:32,192 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 274 transitions. [2022-11-03 02:53:32,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:32,192 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 274 transitions. [2022-11-03 02:53:32,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:32,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:32,197 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:32,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:32,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:32,414 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:32,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:32,415 INFO L85 PathProgramCache]: Analyzing trace with hash -106912163, now seen corresponding path program 1 times [2022-11-03 02:53:32,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:32,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722277493] [2022-11-03 02:53:32,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:32,417 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:32,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:32,422 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:32,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:53:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:33,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:53:33,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:33,116 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 02:53:33,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:33,117 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:33,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722277493] [2022-11-03 02:53:33,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722277493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:33,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:33,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:53:33,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672257070] [2022-11-03 02:53:33,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:33,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:33,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:33,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:33,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:33,120 INFO L87 Difference]: Start difference. First operand 187 states and 274 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:33,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:33,273 INFO L93 Difference]: Finished difference Result 716 states and 1061 transitions. [2022-11-03 02:53:33,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:53:33,274 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:33,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:33,276 INFO L225 Difference]: With dead ends: 716 [2022-11-03 02:53:33,277 INFO L226 Difference]: Without dead ends: 537 [2022-11-03 02:53:33,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:53:33,278 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 1033 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1033 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:33,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1033 Valid, 1543 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:53:33,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-11-03 02:53:33,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 189. [2022-11-03 02:53:33,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.4680851063829787) internal successors, (276), 188 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:33,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 276 transitions. [2022-11-03 02:53:33,288 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 276 transitions. Word has length 182 [2022-11-03 02:53:33,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:33,289 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 276 transitions. [2022-11-03 02:53:33,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:33,290 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 276 transitions. [2022-11-03 02:53:33,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:33,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:33,292 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:33,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:33,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:33,510 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:33,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:33,510 INFO L85 PathProgramCache]: Analyzing trace with hash 420481887, now seen corresponding path program 1 times [2022-11-03 02:53:33,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:33,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741820696] [2022-11-03 02:53:33,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:33,512 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:33,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:33,513 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:33,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:53:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:34,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:53:34,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:34,232 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 02:53:34,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:34,232 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:34,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741820696] [2022-11-03 02:53:34,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741820696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:34,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:34,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:53:34,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465744784] [2022-11-03 02:53:34,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:34,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:53:34,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:34,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:53:34,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:53:34,245 INFO L87 Difference]: Start difference. First operand 189 states and 276 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:34,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:34,779 INFO L93 Difference]: Finished difference Result 724 states and 1070 transitions. [2022-11-03 02:53:34,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:53:34,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:34,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:34,782 INFO L225 Difference]: With dead ends: 724 [2022-11-03 02:53:34,782 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 02:53:34,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:53:34,783 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 1295 mSDsluCounter, 1671 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1295 SdHoareTripleChecker+Valid, 1903 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:34,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1295 Valid, 1903 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:53:34,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 02:53:34,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 191. [2022-11-03 02:53:34,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.4631578947368422) internal successors, (278), 190 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:34,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 278 transitions. [2022-11-03 02:53:34,792 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 278 transitions. Word has length 182 [2022-11-03 02:53:34,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:34,792 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 278 transitions. [2022-11-03 02:53:34,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:34,793 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 278 transitions. [2022-11-03 02:53:34,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:34,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:34,804 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:34,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:35,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:35,022 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:35,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:35,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1069074657, now seen corresponding path program 1 times [2022-11-03 02:53:35,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:35,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [79049450] [2022-11-03 02:53:35,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:35,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:35,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:35,025 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:35,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:53:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:35,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:53:35,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:35,669 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 02:53:35,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:35,669 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:35,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [79049450] [2022-11-03 02:53:35,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [79049450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:35,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:35,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:53:35,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209189556] [2022-11-03 02:53:35,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:35,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:53:35,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:35,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:53:35,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:53:35,673 INFO L87 Difference]: Start difference. First operand 191 states and 278 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:35,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:35,933 INFO L93 Difference]: Finished difference Result 724 states and 1069 transitions. [2022-11-03 02:53:35,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:53:35,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:35,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:35,939 INFO L225 Difference]: With dead ends: 724 [2022-11-03 02:53:35,939 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 02:53:35,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:53:35,941 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 1292 mSDsluCounter, 1760 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 2016 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:35,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1292 Valid, 2016 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:53:35,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 02:53:35,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 193. [2022-11-03 02:53:35,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.4583333333333333) internal successors, (280), 192 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:35,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 280 transitions. [2022-11-03 02:53:35,948 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 280 transitions. Word has length 182 [2022-11-03 02:53:35,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:35,949 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 280 transitions. [2022-11-03 02:53:35,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:35,949 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 280 transitions. [2022-11-03 02:53:35,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:35,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:35,951 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:35,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:36,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:36,165 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:36,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:36,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1159134947, now seen corresponding path program 1 times [2022-11-03 02:53:36,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:36,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142182763] [2022-11-03 02:53:36,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:36,167 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:36,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:36,168 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:36,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:53:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:36,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:53:36,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:36,739 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 02:53:36,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:36,740 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:36,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142182763] [2022-11-03 02:53:36,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142182763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:36,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:36,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:53:36,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604683122] [2022-11-03 02:53:36,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:36,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:36,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:36,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:36,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:36,742 INFO L87 Difference]: Start difference. First operand 193 states and 280 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:36,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:36,968 INFO L93 Difference]: Finished difference Result 724 states and 1068 transitions. [2022-11-03 02:53:36,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:53:36,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:36,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:36,970 INFO L225 Difference]: With dead ends: 724 [2022-11-03 02:53:36,970 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 02:53:36,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:53:36,972 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 1021 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:36,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1021 Valid, 1514 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:53:36,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 02:53:36,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 197. [2022-11-03 02:53:36,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.4540816326530612) internal successors, (285), 196 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 285 transitions. [2022-11-03 02:53:36,980 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 285 transitions. Word has length 182 [2022-11-03 02:53:36,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:36,980 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 285 transitions. [2022-11-03 02:53:36,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:36,981 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 285 transitions. [2022-11-03 02:53:36,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:36,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:36,983 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:37,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:37,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:37,201 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:37,201 INFO L85 PathProgramCache]: Analyzing trace with hash -764115483, now seen corresponding path program 1 times [2022-11-03 02:53:37,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:37,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671786552] [2022-11-03 02:53:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:37,202 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:37,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:37,203 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:37,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:53:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:37,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:53:37,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:37,828 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 02:53:37,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:37,829 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:37,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671786552] [2022-11-03 02:53:37,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671786552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:37,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:37,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:53:37,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043630142] [2022-11-03 02:53:37,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:37,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:53:37,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:37,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:53:37,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:53:37,832 INFO L87 Difference]: Start difference. First operand 197 states and 285 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:37,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:37,952 INFO L93 Difference]: Finished difference Result 715 states and 1056 transitions. [2022-11-03 02:53:37,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:53:37,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:37,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:37,956 INFO L225 Difference]: With dead ends: 715 [2022-11-03 02:53:37,956 INFO L226 Difference]: Without dead ends: 536 [2022-11-03 02:53:37,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 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 02:53:37,959 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 742 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:37,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 1029 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:53:37,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-11-03 02:53:37,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 199. [2022-11-03 02:53:37,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.4494949494949494) internal successors, (287), 198 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:37,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 287 transitions. [2022-11-03 02:53:37,970 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 287 transitions. Word has length 182 [2022-11-03 02:53:37,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:37,970 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 287 transitions. [2022-11-03 02:53:37,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:37,971 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 287 transitions. [2022-11-03 02:53:37,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:37,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:37,974 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:37,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:38,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:38,193 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:38,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:38,193 INFO L85 PathProgramCache]: Analyzing trace with hash -265558681, now seen corresponding path program 1 times [2022-11-03 02:53:38,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:38,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169002060] [2022-11-03 02:53:38,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:38,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:38,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:38,198 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:38,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:53:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:38,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:53:38,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:38,872 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 02:53:38,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:38,873 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:38,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169002060] [2022-11-03 02:53:38,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169002060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:38,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:38,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:53:38,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111036227] [2022-11-03 02:53:38,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:38,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:38,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:38,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:38,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:38,875 INFO L87 Difference]: Start difference. First operand 199 states and 287 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:39,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:39,034 INFO L93 Difference]: Finished difference Result 734 states and 1081 transitions. [2022-11-03 02:53:39,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:53:39,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:39,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:39,037 INFO L225 Difference]: With dead ends: 734 [2022-11-03 02:53:39,037 INFO L226 Difference]: Without dead ends: 555 [2022-11-03 02:53:39,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:53:39,039 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 1021 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:39,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1021 Valid, 1539 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:53:39,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-11-03 02:53:39,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 203. [2022-11-03 02:53:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.4455445544554455) internal successors, (292), 202 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:39,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 292 transitions. [2022-11-03 02:53:39,063 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 292 transitions. Word has length 182 [2022-11-03 02:53:39,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:39,064 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 292 transitions. [2022-11-03 02:53:39,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:39,064 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 292 transitions. [2022-11-03 02:53:39,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:39,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:39,067 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:39,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:39,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:39,281 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:39,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:39,281 INFO L85 PathProgramCache]: Analyzing trace with hash 401823209, now seen corresponding path program 1 times [2022-11-03 02:53:39,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:39,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666391479] [2022-11-03 02:53:39,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:39,283 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:39,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:39,284 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:39,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:53:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:39,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:53:39,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:39,966 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 02:53:39,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:39,966 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:39,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666391479] [2022-11-03 02:53:39,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666391479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:39,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:39,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:53:39,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896367092] [2022-11-03 02:53:39,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:39,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:39,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:39,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:39,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:39,969 INFO L87 Difference]: Start difference. First operand 203 states and 292 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:40,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:40,174 INFO L93 Difference]: Finished difference Result 734 states and 1080 transitions. [2022-11-03 02:53:40,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:53:40,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:40,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:40,177 INFO L225 Difference]: With dead ends: 734 [2022-11-03 02:53:40,177 INFO L226 Difference]: Without dead ends: 555 [2022-11-03 02:53:40,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:53:40,178 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 1014 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1014 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:40,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1014 Valid, 1516 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:53:40,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-11-03 02:53:40,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 205. [2022-11-03 02:53:40,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.4411764705882353) internal successors, (294), 204 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:40,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 294 transitions. [2022-11-03 02:53:40,186 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 294 transitions. Word has length 182 [2022-11-03 02:53:40,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:40,187 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 294 transitions. [2022-11-03 02:53:40,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:40,187 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 294 transitions. [2022-11-03 02:53:40,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:40,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:40,190 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:40,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:40,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:40,401 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:40,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:40,402 INFO L85 PathProgramCache]: Analyzing trace with hash 746651371, now seen corresponding path program 1 times [2022-11-03 02:53:40,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:40,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354194672] [2022-11-03 02:53:40,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:40,403 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:40,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:40,405 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:40,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:53:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:40,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:53:40,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:41,088 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 02:53:41,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:41,088 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:41,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354194672] [2022-11-03 02:53:41,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354194672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:41,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:41,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:53:41,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893807884] [2022-11-03 02:53:41,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:41,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:41,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:41,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:41,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:41,092 INFO L87 Difference]: Start difference. First operand 205 states and 294 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:41,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:41,255 INFO L93 Difference]: Finished difference Result 734 states and 1079 transitions. [2022-11-03 02:53:41,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:53:41,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:41,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:41,258 INFO L225 Difference]: With dead ends: 734 [2022-11-03 02:53:41,258 INFO L226 Difference]: Without dead ends: 555 [2022-11-03 02:53:41,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:53:41,260 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 1007 mSDsluCounter, 1246 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1007 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:41,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1007 Valid, 1528 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:53:41,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-11-03 02:53:41,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 207. [2022-11-03 02:53:41,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.4368932038834952) internal successors, (296), 206 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:41,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 296 transitions. [2022-11-03 02:53:41,268 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 296 transitions. Word has length 182 [2022-11-03 02:53:41,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:41,268 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 296 transitions. [2022-11-03 02:53:41,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:41,269 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 296 transitions. [2022-11-03 02:53:41,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:41,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:41,271 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:41,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:41,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:41,490 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:41,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:41,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1022820243, now seen corresponding path program 1 times [2022-11-03 02:53:41,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:41,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557971294] [2022-11-03 02:53:41,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:41,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:41,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:41,493 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:41,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:53:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:41,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:53:41,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:42,082 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 02:53:42,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:42,083 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:42,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557971294] [2022-11-03 02:53:42,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557971294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:42,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:42,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:53:42,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671489918] [2022-11-03 02:53:42,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:42,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:42,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:42,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:42,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:42,085 INFO L87 Difference]: Start difference. First operand 207 states and 296 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:42,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:42,232 INFO L93 Difference]: Finished difference Result 734 states and 1078 transitions. [2022-11-03 02:53:42,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:53:42,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:42,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:42,235 INFO L225 Difference]: With dead ends: 734 [2022-11-03 02:53:42,235 INFO L226 Difference]: Without dead ends: 555 [2022-11-03 02:53:42,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:53:42,237 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 1000 mSDsluCounter, 1244 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 1530 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:42,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1000 Valid, 1530 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:53:42,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-11-03 02:53:42,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 209. [2022-11-03 02:53:42,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.4326923076923077) internal successors, (298), 208 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:42,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 298 transitions. [2022-11-03 02:53:42,244 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 298 transitions. Word has length 182 [2022-11-03 02:53:42,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:42,244 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 298 transitions. [2022-11-03 02:53:42,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:42,245 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 298 transitions. [2022-11-03 02:53:42,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:42,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:42,247 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:42,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:42,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:42,461 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:42,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:42,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1866955375, now seen corresponding path program 1 times [2022-11-03 02:53:42,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:42,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [968091280] [2022-11-03 02:53:42,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:42,462 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:42,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:42,463 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:42,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:53:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:42,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:53:42,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:43,078 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 02:53:43,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:43,078 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:43,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [968091280] [2022-11-03 02:53:43,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [968091280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:43,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:43,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:53:43,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19224950] [2022-11-03 02:53:43,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:43,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:43,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:43,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:43,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:43,081 INFO L87 Difference]: Start difference. First operand 209 states and 298 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:43,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:43,230 INFO L93 Difference]: Finished difference Result 734 states and 1077 transitions. [2022-11-03 02:53:43,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:53:43,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:43,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:43,233 INFO L225 Difference]: With dead ends: 734 [2022-11-03 02:53:43,233 INFO L226 Difference]: Without dead ends: 555 [2022-11-03 02:53:43,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:53:43,234 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 993 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:43,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [993 Valid, 1522 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:53:43,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-11-03 02:53:43,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 211. [2022-11-03 02:53:43,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.4285714285714286) internal successors, (300), 210 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:43,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 300 transitions. [2022-11-03 02:53:43,242 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 300 transitions. Word has length 182 [2022-11-03 02:53:43,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:43,242 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 300 transitions. [2022-11-03 02:53:43,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:43,243 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 300 transitions. [2022-11-03 02:53:43,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:43,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:43,245 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:43,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:43,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:43,462 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:43,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:43,462 INFO L85 PathProgramCache]: Analyzing trace with hash -981431055, now seen corresponding path program 1 times [2022-11-03 02:53:43,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:43,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141272324] [2022-11-03 02:53:43,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:43,463 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:43,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:43,464 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:43,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:53:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:43,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:53:43,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:44,132 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 02:53:44,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:44,133 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:44,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141272324] [2022-11-03 02:53:44,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141272324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:44,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:44,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:53:44,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844418310] [2022-11-03 02:53:44,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:44,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:44,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:44,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:44,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:44,136 INFO L87 Difference]: Start difference. First operand 211 states and 300 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:44,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:44,298 INFO L93 Difference]: Finished difference Result 716 states and 1051 transitions. [2022-11-03 02:53:44,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:53:44,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:44,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:44,303 INFO L225 Difference]: With dead ends: 716 [2022-11-03 02:53:44,303 INFO L226 Difference]: Without dead ends: 537 [2022-11-03 02:53:44,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:53:44,305 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 948 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:44,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [948 Valid, 1488 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:53:44,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-11-03 02:53:44,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 215. [2022-11-03 02:53:44,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.425233644859813) internal successors, (305), 214 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:44,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 305 transitions. [2022-11-03 02:53:44,313 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 305 transitions. Word has length 182 [2022-11-03 02:53:44,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:44,315 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 305 transitions. [2022-11-03 02:53:44,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:44,315 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 305 transitions. [2022-11-03 02:53:44,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:44,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:44,318 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:44,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:44,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:44,532 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:44,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:44,532 INFO L85 PathProgramCache]: Analyzing trace with hash 949694579, now seen corresponding path program 1 times [2022-11-03 02:53:44,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:44,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615092540] [2022-11-03 02:53:44,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:44,534 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:44,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:44,535 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:44,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:53:45,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:45,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:53:45,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:45,251 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 02:53:45,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:45,252 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:45,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615092540] [2022-11-03 02:53:45,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615092540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:45,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:45,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:53:45,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629342880] [2022-11-03 02:53:45,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:45,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:53:45,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:45,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:53:45,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:53:45,254 INFO L87 Difference]: Start difference. First operand 215 states and 305 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:45,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:45,510 INFO L93 Difference]: Finished difference Result 750 states and 1099 transitions. [2022-11-03 02:53:45,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:53:45,511 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:45,513 INFO L225 Difference]: With dead ends: 750 [2022-11-03 02:53:45,513 INFO L226 Difference]: Without dead ends: 571 [2022-11-03 02:53:45,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:53:45,514 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 1254 mSDsluCounter, 1685 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1254 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:45,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1254 Valid, 1972 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:53:45,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-11-03 02:53:45,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 217. [2022-11-03 02:53:45,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.4212962962962963) internal successors, (307), 216 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:45,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 307 transitions. [2022-11-03 02:53:45,522 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 307 transitions. Word has length 182 [2022-11-03 02:53:45,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:45,522 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 307 transitions. [2022-11-03 02:53:45,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:45,523 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 307 transitions. [2022-11-03 02:53:45,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:45,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:45,524 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:45,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:45,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:45,737 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:45,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:45,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1448293259, now seen corresponding path program 1 times [2022-11-03 02:53:45,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:45,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46525470] [2022-11-03 02:53:45,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:45,739 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:45,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:45,740 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:45,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:53:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:46,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:53:46,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:46,447 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 02:53:46,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:46,447 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:46,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46525470] [2022-11-03 02:53:46,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46525470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:46,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:46,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:53:46,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249146121] [2022-11-03 02:53:46,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:46,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:53:46,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:46,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:53:46,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:53:46,450 INFO L87 Difference]: Start difference. First operand 217 states and 307 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:46,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:46,916 INFO L93 Difference]: Finished difference Result 724 states and 1059 transitions. [2022-11-03 02:53:46,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:53:46,921 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:46,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:46,925 INFO L225 Difference]: With dead ends: 724 [2022-11-03 02:53:46,925 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 02:53:46,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:53:46,928 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 1187 mSDsluCounter, 1538 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:46,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1187 Valid, 1804 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:53:46,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 02:53:46,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 221. [2022-11-03 02:53:46,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.4181818181818182) internal successors, (312), 220 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:46,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 312 transitions. [2022-11-03 02:53:46,941 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 312 transitions. Word has length 182 [2022-11-03 02:53:46,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:46,941 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 312 transitions. [2022-11-03 02:53:46,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:46,941 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 312 transitions. [2022-11-03 02:53:46,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:46,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:46,943 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:46,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:47,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:47,160 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:47,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:47,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1604273801, now seen corresponding path program 1 times [2022-11-03 02:53:47,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:47,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532262337] [2022-11-03 02:53:47,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:47,162 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:47,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:47,163 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:47,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:53:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:47,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:53:47,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:47,724 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 02:53:47,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:47,724 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:47,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532262337] [2022-11-03 02:53:47,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532262337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:47,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:47,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:53:47,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653694434] [2022-11-03 02:53:47,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:47,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:53:47,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:47,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:53:47,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:53:47,727 INFO L87 Difference]: Start difference. First operand 221 states and 312 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:47,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:47,939 INFO L93 Difference]: Finished difference Result 724 states and 1058 transitions. [2022-11-03 02:53:47,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:53:47,940 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:47,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:47,941 INFO L225 Difference]: With dead ends: 724 [2022-11-03 02:53:47,941 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 02:53:47,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:53:47,943 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 1184 mSDsluCounter, 1626 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 1916 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:47,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1184 Valid, 1916 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:53:47,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 02:53:47,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 223. [2022-11-03 02:53:47,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.4144144144144144) internal successors, (314), 222 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:47,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 314 transitions. [2022-11-03 02:53:47,949 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 314 transitions. Word has length 182 [2022-11-03 02:53:47,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:47,950 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 314 transitions. [2022-11-03 02:53:47,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:47,950 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 314 transitions. [2022-11-03 02:53:47,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:47,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:47,951 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:47,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:48,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:48,168 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:48,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:48,169 INFO L85 PathProgramCache]: Analyzing trace with hash 902823673, now seen corresponding path program 1 times [2022-11-03 02:53:48,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:48,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811090508] [2022-11-03 02:53:48,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:48,170 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:48,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:48,172 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:48,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:53:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:48,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:53:48,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:48,775 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 02:53:48,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:48,776 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:48,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811090508] [2022-11-03 02:53:48,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811090508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:48,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:48,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:53:48,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715317876] [2022-11-03 02:53:48,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:48,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:48,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:48,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:48,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:48,781 INFO L87 Difference]: Start difference. First operand 223 states and 314 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:48,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:48,971 INFO L93 Difference]: Finished difference Result 734 states and 1072 transitions. [2022-11-03 02:53:48,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:53:48,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:48,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:48,974 INFO L225 Difference]: With dead ends: 734 [2022-11-03 02:53:48,974 INFO L226 Difference]: Without dead ends: 555 [2022-11-03 02:53:48,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:53:48,975 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 943 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:48,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [943 Valid, 1472 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:53:48,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-11-03 02:53:48,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 227. [2022-11-03 02:53:48,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.4115044247787611) internal successors, (319), 226 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:48,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 319 transitions. [2022-11-03 02:53:48,984 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 319 transitions. Word has length 182 [2022-11-03 02:53:48,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:48,984 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 319 transitions. [2022-11-03 02:53:48,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:48,984 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 319 transitions. [2022-11-03 02:53:48,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:48,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:48,986 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:49,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:49,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:49,204 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:49,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:49,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1993190021, now seen corresponding path program 1 times [2022-11-03 02:53:49,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:49,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071447781] [2022-11-03 02:53:49,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:49,206 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:49,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:49,207 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:49,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:53:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:49,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:53:49,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:49,769 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 02:53:49,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:49,770 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:49,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071447781] [2022-11-03 02:53:49,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071447781] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:49,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:49,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:53:49,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024099713] [2022-11-03 02:53:49,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:49,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:53:49,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:49,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:53:49,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:53:49,772 INFO L87 Difference]: Start difference. First operand 227 states and 319 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:49,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:49,846 INFO L93 Difference]: Finished difference Result 715 states and 1045 transitions. [2022-11-03 02:53:49,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:53:49,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:49,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:49,851 INFO L225 Difference]: With dead ends: 715 [2022-11-03 02:53:49,851 INFO L226 Difference]: Without dead ends: 536 [2022-11-03 02:53:49,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 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 02:53:49,853 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 651 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:49,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 1021 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:53:49,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-11-03 02:53:49,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 231. [2022-11-03 02:53:49,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.4086956521739131) internal successors, (324), 230 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:49,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 324 transitions. [2022-11-03 02:53:49,862 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 324 transitions. Word has length 182 [2022-11-03 02:53:49,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:49,862 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 324 transitions. [2022-11-03 02:53:49,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:49,863 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 324 transitions. [2022-11-03 02:53:49,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:49,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:49,864 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:49,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-11-03 02:53:50,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:50,082 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:50,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:50,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1756904701, now seen corresponding path program 1 times [2022-11-03 02:53:50,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:50,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474983921] [2022-11-03 02:53:50,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:50,083 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:50,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:50,084 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:50,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:53:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:50,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:53:50,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:50,758 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 02:53:50,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:50,758 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:50,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474983921] [2022-11-03 02:53:50,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474983921] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:50,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:50,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:53:50,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079857608] [2022-11-03 02:53:50,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:50,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:50,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:50,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:50,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:50,761 INFO L87 Difference]: Start difference. First operand 231 states and 324 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:50,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:50,951 INFO L93 Difference]: Finished difference Result 766 states and 1118 transitions. [2022-11-03 02:53:50,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:53:50,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:50,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:50,954 INFO L225 Difference]: With dead ends: 766 [2022-11-03 02:53:50,954 INFO L226 Difference]: Without dead ends: 587 [2022-11-03 02:53:50,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:53:50,955 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 978 mSDsluCounter, 1195 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 1504 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:50,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [978 Valid, 1504 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:53:50,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-11-03 02:53:50,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 235. [2022-11-03 02:53:50,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.4059829059829059) internal successors, (329), 234 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:50,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 329 transitions. [2022-11-03 02:53:50,963 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 329 transitions. Word has length 182 [2022-11-03 02:53:50,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:50,964 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 329 transitions. [2022-11-03 02:53:50,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:50,964 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 329 transitions. [2022-11-03 02:53:50,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:50,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:50,965 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:50,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:51,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:51,184 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:51,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:51,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1322399103, now seen corresponding path program 1 times [2022-11-03 02:53:51,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:51,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955580805] [2022-11-03 02:53:51,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:51,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:51,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:51,186 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:51,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:53:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:51,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:53:51,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:51,861 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 02:53:51,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:51,862 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:51,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955580805] [2022-11-03 02:53:51,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955580805] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:51,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:51,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:53:51,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042091050] [2022-11-03 02:53:51,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:51,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:53:51,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:51,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:53:51,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:53:51,864 INFO L87 Difference]: Start difference. First operand 235 states and 329 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:52,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:52,098 INFO L93 Difference]: Finished difference Result 715 states and 1043 transitions. [2022-11-03 02:53:52,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:53:52,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:52,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:52,101 INFO L225 Difference]: With dead ends: 715 [2022-11-03 02:53:52,101 INFO L226 Difference]: Without dead ends: 536 [2022-11-03 02:53:52,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 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 02:53:52,102 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 633 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:52,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 949 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:53:52,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-11-03 02:53:52,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 237. [2022-11-03 02:53:52,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.402542372881356) internal successors, (331), 236 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:52,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 331 transitions. [2022-11-03 02:53:52,110 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 331 transitions. Word has length 182 [2022-11-03 02:53:52,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:52,111 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 331 transitions. [2022-11-03 02:53:52,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:52,111 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 331 transitions. [2022-11-03 02:53:52,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:52,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:52,112 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:52,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:52,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:52,325 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:52,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:52,325 INFO L85 PathProgramCache]: Analyzing trace with hash 615802497, now seen corresponding path program 1 times [2022-11-03 02:53:52,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:52,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867906624] [2022-11-03 02:53:52,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:52,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:52,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:52,327 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:52,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:53:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:52,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:53:52,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:53,020 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 02:53:53,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:53,020 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:53,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867906624] [2022-11-03 02:53:53,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867906624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:53,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:53,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:53:53,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741758117] [2022-11-03 02:53:53,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:53,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:53,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:53,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:53,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:53,023 INFO L87 Difference]: Start difference. First operand 237 states and 331 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:53,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:53,284 INFO L93 Difference]: Finished difference Result 772 states and 1125 transitions. [2022-11-03 02:53:53,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:53:53,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:53,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:53,287 INFO L225 Difference]: With dead ends: 772 [2022-11-03 02:53:53,287 INFO L226 Difference]: Without dead ends: 593 [2022-11-03 02:53:53,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:53:53,288 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 973 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 1466 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:53,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [973 Valid, 1466 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:53:53,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-11-03 02:53:53,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 239. [2022-11-03 02:53:53,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.3991596638655461) internal successors, (333), 238 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:53,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 333 transitions. [2022-11-03 02:53:53,298 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 333 transitions. Word has length 182 [2022-11-03 02:53:53,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:53,298 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 333 transitions. [2022-11-03 02:53:53,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:53,298 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 333 transitions. [2022-11-03 02:53:53,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:53,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:53,299 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:53,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-03 02:53:53,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:53,500 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:53,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:53,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1477636099, now seen corresponding path program 1 times [2022-11-03 02:53:53,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:53,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681617948] [2022-11-03 02:53:53,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:53,502 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:53,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:53,502 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:53,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:53:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:53,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:53:53,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:54,146 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 02:53:54,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:54,146 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:54,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681617948] [2022-11-03 02:53:54,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681617948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:54,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:54,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:53:54,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864916222] [2022-11-03 02:53:54,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:54,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:54,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:54,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:54,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:54,148 INFO L87 Difference]: Start difference. First operand 239 states and 333 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:54,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:54,406 INFO L93 Difference]: Finished difference Result 772 states and 1124 transitions. [2022-11-03 02:53:54,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:53:54,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:54,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:54,408 INFO L225 Difference]: With dead ends: 772 [2022-11-03 02:53:54,408 INFO L226 Difference]: Without dead ends: 593 [2022-11-03 02:53:54,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:53:54,409 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 966 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 1462 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:54,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [966 Valid, 1462 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:53:54,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-11-03 02:53:54,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 241. [2022-11-03 02:53:54,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.3958333333333333) internal successors, (335), 240 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:54,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 335 transitions. [2022-11-03 02:53:54,417 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 335 transitions. Word has length 182 [2022-11-03 02:53:54,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:54,418 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 335 transitions. [2022-11-03 02:53:54,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:54,418 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 335 transitions. [2022-11-03 02:53:54,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:54,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:54,419 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:54,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-11-03 02:53:54,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:54,633 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:54,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:54,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1965683205, now seen corresponding path program 1 times [2022-11-03 02:53:54,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:54,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847883111] [2022-11-03 02:53:54,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:54,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:54,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:54,635 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:54,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 02:53:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:55,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:53:55,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:55,316 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 02:53:55,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:55,317 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:55,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847883111] [2022-11-03 02:53:55,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847883111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:55,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:55,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:53:55,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856112777] [2022-11-03 02:53:55,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:55,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:55,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:55,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:55,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:55,319 INFO L87 Difference]: Start difference. First operand 241 states and 335 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:55,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:55,488 INFO L93 Difference]: Finished difference Result 772 states and 1123 transitions. [2022-11-03 02:53:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:53:55,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:55,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:55,489 INFO L225 Difference]: With dead ends: 772 [2022-11-03 02:53:55,490 INFO L226 Difference]: Without dead ends: 593 [2022-11-03 02:53:55,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:53:55,491 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 961 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 1496 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:55,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [961 Valid, 1496 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:53:55,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-11-03 02:53:55,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 243. [2022-11-03 02:53:55,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.3925619834710743) internal successors, (337), 242 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:55,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 337 transitions. [2022-11-03 02:53:55,498 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 337 transitions. Word has length 182 [2022-11-03 02:53:55,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:55,498 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 337 transitions. [2022-11-03 02:53:55,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:55,499 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 337 transitions. [2022-11-03 02:53:55,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:55,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:55,500 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:55,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:55,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:55,717 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:55,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:55,717 INFO L85 PathProgramCache]: Analyzing trace with hash 683510919, now seen corresponding path program 1 times [2022-11-03 02:53:55,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:55,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [658994385] [2022-11-03 02:53:55,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:55,718 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:55,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:55,720 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:55,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:53:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:56,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:53:56,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:56,401 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 02:53:56,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:56,402 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:56,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [658994385] [2022-11-03 02:53:56,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [658994385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:56,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:56,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:53:56,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885145933] [2022-11-03 02:53:56,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:56,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:53:56,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:56,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:53:56,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:53:56,404 INFO L87 Difference]: Start difference. First operand 243 states and 337 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:56,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:56,633 INFO L93 Difference]: Finished difference Result 715 states and 1039 transitions. [2022-11-03 02:53:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:53:56,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:56,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:56,637 INFO L225 Difference]: With dead ends: 715 [2022-11-03 02:53:56,637 INFO L226 Difference]: Without dead ends: 536 [2022-11-03 02:53:56,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 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 02:53:56,638 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 609 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:56,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 945 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:53:56,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-11-03 02:53:56,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 245. [2022-11-03 02:53:56,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.389344262295082) internal successors, (339), 244 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:56,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 339 transitions. [2022-11-03 02:53:56,646 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 339 transitions. Word has length 182 [2022-11-03 02:53:56,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:56,646 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 339 transitions. [2022-11-03 02:53:56,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:56,647 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 339 transitions. [2022-11-03 02:53:56,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:56,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:56,648 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:56,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:56,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:56,861 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:56,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:56,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1038491767, now seen corresponding path program 1 times [2022-11-03 02:53:56,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:56,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819806260] [2022-11-03 02:53:56,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:56,862 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:56,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:56,863 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:56,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 02:53:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:57,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:53:57,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:57,556 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 02:53:57,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:57,556 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:57,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819806260] [2022-11-03 02:53:57,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819806260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:57,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:57,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:53:57,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714923337] [2022-11-03 02:53:57,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:57,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:57,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:57,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:57,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:57,559 INFO L87 Difference]: Start difference. First operand 245 states and 339 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:57,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:57,820 INFO L93 Difference]: Finished difference Result 780 states and 1133 transitions. [2022-11-03 02:53:57,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:53:57,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:57,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:57,822 INFO L225 Difference]: With dead ends: 780 [2022-11-03 02:53:57,822 INFO L226 Difference]: Without dead ends: 601 [2022-11-03 02:53:57,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:53:57,823 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 961 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:57,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [961 Valid, 1461 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:53:57,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-11-03 02:53:57,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 247. [2022-11-03 02:53:57,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.386178861788618) internal successors, (341), 246 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:57,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 341 transitions. [2022-11-03 02:53:57,830 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 341 transitions. Word has length 182 [2022-11-03 02:53:57,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:57,831 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 341 transitions. [2022-11-03 02:53:57,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:57,831 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 341 transitions. [2022-11-03 02:53:57,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:57,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:57,832 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:57,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-03 02:53:58,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:58,046 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:58,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:58,047 INFO L85 PathProgramCache]: Analyzing trace with hash 890440459, now seen corresponding path program 1 times [2022-11-03 02:53:58,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:58,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1368915596] [2022-11-03 02:53:58,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:58,048 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:58,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:58,050 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:58,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 02:53:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:58,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:53:58,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:58,735 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 02:53:58,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:58,735 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:58,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1368915596] [2022-11-03 02:53:58,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1368915596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:58,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:58,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:53:58,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842615747] [2022-11-03 02:53:58,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:58,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:58,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:58,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:58,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:58,740 INFO L87 Difference]: Start difference. First operand 247 states and 341 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:58,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:58,997 INFO L93 Difference]: Finished difference Result 780 states and 1132 transitions. [2022-11-03 02:53:59,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:53:59,013 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:53:59,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:59,015 INFO L225 Difference]: With dead ends: 780 [2022-11-03 02:53:59,015 INFO L226 Difference]: Without dead ends: 601 [2022-11-03 02:53:59,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:53:59,017 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 954 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 1457 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:59,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [954 Valid, 1457 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:53:59,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-11-03 02:53:59,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 249. [2022-11-03 02:53:59,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.3830645161290323) internal successors, (343), 248 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:59,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 343 transitions. [2022-11-03 02:53:59,026 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 343 transitions. Word has length 182 [2022-11-03 02:53:59,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:59,027 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 343 transitions. [2022-11-03 02:53:59,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:59,027 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 343 transitions. [2022-11-03 02:53:59,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:53:59,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:59,028 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:59,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:59,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:59,246 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:59,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:59,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1677381875, now seen corresponding path program 1 times [2022-11-03 02:53:59,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:59,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097567265] [2022-11-03 02:53:59,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:59,247 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:59,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:59,248 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:59,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:53:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:59,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:53:59,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:59,926 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 02:53:59,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:59,927 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:59,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097567265] [2022-11-03 02:53:59,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1097567265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:59,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:59,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:53:59,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328155650] [2022-11-03 02:53:59,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:59,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:59,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:59,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:59,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:59,929 INFO L87 Difference]: Start difference. First operand 249 states and 343 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:00,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:00,099 INFO L93 Difference]: Finished difference Result 788 states and 1143 transitions. [2022-11-03 02:54:00,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:54:00,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:00,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:00,101 INFO L225 Difference]: With dead ends: 788 [2022-11-03 02:54:00,101 INFO L226 Difference]: Without dead ends: 609 [2022-11-03 02:54:00,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:54:00,103 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 949 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:00,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [949 Valid, 1493 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:54:00,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-11-03 02:54:00,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 257. [2022-11-03 02:54:00,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.3828125) internal successors, (354), 256 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:00,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 354 transitions. [2022-11-03 02:54:00,110 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 354 transitions. Word has length 182 [2022-11-03 02:54:00,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:00,111 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 354 transitions. [2022-11-03 02:54:00,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:00,111 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 354 transitions. [2022-11-03 02:54:00,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:00,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:00,112 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:00,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:00,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:00,328 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:00,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:00,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1558940401, now seen corresponding path program 1 times [2022-11-03 02:54:00,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:00,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133572040] [2022-11-03 02:54:00,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:00,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:00,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:00,331 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:00,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 02:54:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:00,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:54:00,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:01,257 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 02:54:01,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:01,257 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:01,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133572040] [2022-11-03 02:54:01,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133572040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:01,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:01,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:54:01,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961810954] [2022-11-03 02:54:01,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:01,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:54:01,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:01,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:54:01,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:54:01,260 INFO L87 Difference]: Start difference. First operand 257 states and 354 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:01,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:01,421 INFO L93 Difference]: Finished difference Result 715 states and 1035 transitions. [2022-11-03 02:54:01,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:54:01,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:01,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:01,424 INFO L225 Difference]: With dead ends: 715 [2022-11-03 02:54:01,424 INFO L226 Difference]: Without dead ends: 536 [2022-11-03 02:54:01,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 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 02:54:01,425 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 570 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:01,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 992 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:54:01,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-11-03 02:54:01,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 259. [2022-11-03 02:54:01,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.37984496124031) internal successors, (356), 258 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:01,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 356 transitions. [2022-11-03 02:54:01,444 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 356 transitions. Word has length 182 [2022-11-03 02:54:01,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:01,445 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 356 transitions. [2022-11-03 02:54:01,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:01,445 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 356 transitions. [2022-11-03 02:54:01,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:01,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:01,446 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:01,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:01,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:01,664 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:01,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:01,665 INFO L85 PathProgramCache]: Analyzing trace with hash 702632849, now seen corresponding path program 1 times [2022-11-03 02:54:01,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:01,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781144015] [2022-11-03 02:54:01,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:01,666 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:01,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:01,667 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:01,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 02:54:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:02,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:54:02,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:02,323 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 02:54:02,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:02,323 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:02,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781144015] [2022-11-03 02:54:02,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781144015] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:02,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:02,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:54:02,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144191807] [2022-11-03 02:54:02,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:02,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:54:02,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:02,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:54:02,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:54:02,325 INFO L87 Difference]: Start difference. First operand 259 states and 356 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:02,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:02,758 INFO L93 Difference]: Finished difference Result 724 states and 1045 transitions. [2022-11-03 02:54:02,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:54:02,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:02,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:02,760 INFO L225 Difference]: With dead ends: 724 [2022-11-03 02:54:02,761 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 02:54:02,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:54:02,762 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 1045 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 1673 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:02,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1045 Valid, 1673 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:54:02,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 02:54:02,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 261. [2022-11-03 02:54:02,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.376923076923077) internal successors, (358), 260 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:02,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 358 transitions. [2022-11-03 02:54:02,770 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 358 transitions. Word has length 182 [2022-11-03 02:54:02,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:02,770 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 358 transitions. [2022-11-03 02:54:02,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:02,771 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 358 transitions. [2022-11-03 02:54:02,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:02,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:02,772 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:02,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-03 02:54:02,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:02,989 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:02,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:02,989 INFO L85 PathProgramCache]: Analyzing trace with hash -604509549, now seen corresponding path program 1 times [2022-11-03 02:54:02,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:02,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485413813] [2022-11-03 02:54:02,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:02,991 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:02,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:02,992 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:03,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 02:54:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:03,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:54:03,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:03,635 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 02:54:03,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:03,635 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:03,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485413813] [2022-11-03 02:54:03,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485413813] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:03,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:03,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:54:03,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388598401] [2022-11-03 02:54:03,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:03,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:54:03,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:03,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:54:03,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:54:03,637 INFO L87 Difference]: Start difference. First operand 261 states and 358 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:03,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:03,849 INFO L93 Difference]: Finished difference Result 724 states and 1044 transitions. [2022-11-03 02:54:03,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:54:03,849 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:03,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:03,850 INFO L225 Difference]: With dead ends: 724 [2022-11-03 02:54:03,850 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 02:54:03,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:54:03,852 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 1042 mSDsluCounter, 1448 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1042 SdHoareTripleChecker+Valid, 1784 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:03,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1042 Valid, 1784 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:54:03,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 02:54:03,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 263. [2022-11-03 02:54:03,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.3740458015267176) internal successors, (360), 262 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:03,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 360 transitions. [2022-11-03 02:54:03,859 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 360 transitions. Word has length 182 [2022-11-03 02:54:03,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:03,860 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 360 transitions. [2022-11-03 02:54:03,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:03,860 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 360 transitions. [2022-11-03 02:54:03,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:03,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:03,862 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:03,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:04,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:04,080 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:04,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:04,080 INFO L85 PathProgramCache]: Analyzing trace with hash 426531349, now seen corresponding path program 1 times [2022-11-03 02:54:04,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:04,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072780389] [2022-11-03 02:54:04,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:04,082 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:04,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:04,083 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:04,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 02:54:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:04,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:54:04,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:05,142 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 02:54:05,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:05,143 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:05,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072780389] [2022-11-03 02:54:05,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2072780389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:05,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:05,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:54:05,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126554143] [2022-11-03 02:54:05,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:05,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:54:05,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:05,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:54:05,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:54:05,145 INFO L87 Difference]: Start difference. First operand 263 states and 360 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:05,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:05,361 INFO L93 Difference]: Finished difference Result 794 states and 1148 transitions. [2022-11-03 02:54:05,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:54:05,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:05,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:05,364 INFO L225 Difference]: With dead ends: 794 [2022-11-03 02:54:05,364 INFO L226 Difference]: Without dead ends: 615 [2022-11-03 02:54:05,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:54:05,366 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 923 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:05,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 1482 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:54:05,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-11-03 02:54:05,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 267. [2022-11-03 02:54:05,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.3721804511278195) internal successors, (365), 266 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:05,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 365 transitions. [2022-11-03 02:54:05,375 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 365 transitions. Word has length 182 [2022-11-03 02:54:05,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:05,375 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 365 transitions. [2022-11-03 02:54:05,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:05,375 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 365 transitions. [2022-11-03 02:54:05,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:05,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:05,377 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:05,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:05,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:05,596 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:05,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:05,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1777916567, now seen corresponding path program 1 times [2022-11-03 02:54:05,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:05,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332820519] [2022-11-03 02:54:05,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:05,598 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:05,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:05,599 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:05,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 02:54:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:06,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:54:06,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:06,293 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 02:54:06,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:06,294 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:06,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332820519] [2022-11-03 02:54:06,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332820519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:06,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:06,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:54:06,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608066591] [2022-11-03 02:54:06,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:06,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:54:06,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:06,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:54:06,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:54:06,297 INFO L87 Difference]: Start difference. First operand 267 states and 365 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:06,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:06,728 INFO L93 Difference]: Finished difference Result 724 states and 1042 transitions. [2022-11-03 02:54:06,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:54:06,729 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:06,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:06,732 INFO L225 Difference]: With dead ends: 724 [2022-11-03 02:54:06,732 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 02:54:06,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:54:06,734 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 1011 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 1641 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:06,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1011 Valid, 1641 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:54:06,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 02:54:06,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 271. [2022-11-03 02:54:06,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.3703703703703705) internal successors, (370), 270 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:06,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 370 transitions. [2022-11-03 02:54:06,741 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 370 transitions. Word has length 182 [2022-11-03 02:54:06,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:06,742 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 370 transitions. [2022-11-03 02:54:06,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:06,742 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 370 transitions. [2022-11-03 02:54:06,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:06,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:06,744 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:06,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:06,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:06,963 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:06,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:06,963 INFO L85 PathProgramCache]: Analyzing trace with hash -162665447, now seen corresponding path program 1 times [2022-11-03 02:54:06,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:06,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060575083] [2022-11-03 02:54:06,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:06,965 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:06,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:06,966 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:06,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 02:54:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:07,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:54:07,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:07,622 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 02:54:07,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:07,623 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:07,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060575083] [2022-11-03 02:54:07,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060575083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:07,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:07,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:54:07,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114204135] [2022-11-03 02:54:07,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:07,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:54:07,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:07,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:54:07,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:54:07,626 INFO L87 Difference]: Start difference. First operand 271 states and 370 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:07,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:07,882 INFO L93 Difference]: Finished difference Result 724 states and 1041 transitions. [2022-11-03 02:54:07,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:54:07,882 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:07,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:07,885 INFO L225 Difference]: With dead ends: 724 [2022-11-03 02:54:07,885 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 02:54:07,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:54:07,886 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 1008 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:07,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1008 Valid, 1751 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:54:07,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 02:54:07,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 273. [2022-11-03 02:54:07,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.3676470588235294) internal successors, (372), 272 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:07,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 372 transitions. [2022-11-03 02:54:07,893 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 372 transitions. Word has length 182 [2022-11-03 02:54:07,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:07,893 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 372 transitions. [2022-11-03 02:54:07,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:07,894 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 372 transitions. [2022-11-03 02:54:07,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:07,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:07,895 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:07,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-03 02:54:08,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:08,109 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:08,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:08,109 INFO L85 PathProgramCache]: Analyzing trace with hash -933399013, now seen corresponding path program 1 times [2022-11-03 02:54:08,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:08,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658624989] [2022-11-03 02:54:08,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:08,111 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:08,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:08,113 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:08,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 02:54:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:08,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:54:08,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:08,961 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 02:54:08,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:08,962 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:08,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658624989] [2022-11-03 02:54:08,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658624989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:08,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:08,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:54:08,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449880924] [2022-11-03 02:54:08,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:08,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:54:08,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:08,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:54:08,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:54:08,964 INFO L87 Difference]: Start difference. First operand 273 states and 372 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:09,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:09,169 INFO L93 Difference]: Finished difference Result 802 states and 1157 transitions. [2022-11-03 02:54:09,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:54:09,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:09,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:09,173 INFO L225 Difference]: With dead ends: 802 [2022-11-03 02:54:09,173 INFO L226 Difference]: Without dead ends: 623 [2022-11-03 02:54:09,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:54:09,174 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 915 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:09,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [915 Valid, 1474 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:54:09,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-11-03 02:54:09,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 275. [2022-11-03 02:54:09,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.364963503649635) internal successors, (374), 274 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:09,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 374 transitions. [2022-11-03 02:54:09,181 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 374 transitions. Word has length 182 [2022-11-03 02:54:09,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:09,181 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 374 transitions. [2022-11-03 02:54:09,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:09,182 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 374 transitions. [2022-11-03 02:54:09,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:09,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:09,183 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:09,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-03 02:54:09,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:09,397 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:09,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:09,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1519675235, now seen corresponding path program 1 times [2022-11-03 02:54:09,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:09,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844264943] [2022-11-03 02:54:09,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:09,398 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:09,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:09,399 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:09,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 02:54:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:09,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:54:09,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:10,480 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 02:54:10,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:10,480 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:10,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844264943] [2022-11-03 02:54:10,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844264943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:10,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:10,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:54:10,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735493763] [2022-11-03 02:54:10,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:10,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:54:10,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:10,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:54:10,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:54:10,483 INFO L87 Difference]: Start difference. First operand 275 states and 374 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:10,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:10,643 INFO L93 Difference]: Finished difference Result 715 states and 1028 transitions. [2022-11-03 02:54:10,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:54:10,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:10,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:10,645 INFO L225 Difference]: With dead ends: 715 [2022-11-03 02:54:10,645 INFO L226 Difference]: Without dead ends: 536 [2022-11-03 02:54:10,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 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 02:54:10,646 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 518 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:10,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 985 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:54:10,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-11-03 02:54:10,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 277. [2022-11-03 02:54:10,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.3623188405797102) internal successors, (376), 276 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:10,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 376 transitions. [2022-11-03 02:54:10,650 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 376 transitions. Word has length 182 [2022-11-03 02:54:10,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:10,651 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 376 transitions. [2022-11-03 02:54:10,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:10,651 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 376 transitions. [2022-11-03 02:54:10,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:10,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:10,652 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:10,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-03 02:54:10,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:10,852 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:10,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:10,853 INFO L85 PathProgramCache]: Analyzing trace with hash 356807583, now seen corresponding path program 1 times [2022-11-03 02:54:10,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:10,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834806553] [2022-11-03 02:54:10,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:10,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:10,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:10,855 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:10,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 02:54:11,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:11,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:54:11,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:11,527 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 02:54:11,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:11,528 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:11,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834806553] [2022-11-03 02:54:11,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834806553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:11,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:11,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:54:11,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102050358] [2022-11-03 02:54:11,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:11,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:54:11,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:11,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:54:11,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:54:11,530 INFO L87 Difference]: Start difference. First operand 277 states and 376 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:11,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:11,742 INFO L93 Difference]: Finished difference Result 724 states and 1038 transitions. [2022-11-03 02:54:11,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:54:11,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:11,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:11,746 INFO L225 Difference]: With dead ends: 724 [2022-11-03 02:54:11,746 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 02:54:11,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:54:11,747 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 984 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 1730 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:11,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [984 Valid, 1730 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:54:11,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 02:54:11,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 279. [2022-11-03 02:54:11,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.3597122302158273) internal successors, (378), 278 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:11,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 378 transitions. [2022-11-03 02:54:11,752 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 378 transitions. Word has length 182 [2022-11-03 02:54:11,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:11,752 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 378 transitions. [2022-11-03 02:54:11,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:11,753 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 378 transitions. [2022-11-03 02:54:11,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:11,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:11,754 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:11,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-03 02:54:11,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:11,969 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:11,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:11,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1681663777, now seen corresponding path program 1 times [2022-11-03 02:54:11,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:11,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832158742] [2022-11-03 02:54:11,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:11,971 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:11,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:11,972 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:11,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 02:54:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:12,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:54:12,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:12,899 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 02:54:12,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:12,900 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:12,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832158742] [2022-11-03 02:54:12,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832158742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:12,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:12,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:54:12,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757015608] [2022-11-03 02:54:12,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:12,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:54:12,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:12,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:54:12,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:54:12,905 INFO L87 Difference]: Start difference. First operand 279 states and 378 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:13,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:13,122 INFO L93 Difference]: Finished difference Result 812 states and 1169 transitions. [2022-11-03 02:54:13,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:54:13,123 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:13,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:13,124 INFO L225 Difference]: With dead ends: 812 [2022-11-03 02:54:13,124 INFO L226 Difference]: Without dead ends: 633 [2022-11-03 02:54:13,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:54:13,125 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 913 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 913 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:13,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [913 Valid, 1476 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:54:13,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-11-03 02:54:13,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 281. [2022-11-03 02:54:13,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.3571428571428572) internal successors, (380), 280 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:13,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 380 transitions. [2022-11-03 02:54:13,132 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 380 transitions. Word has length 182 [2022-11-03 02:54:13,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:13,133 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 380 transitions. [2022-11-03 02:54:13,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:13,133 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 380 transitions. [2022-11-03 02:54:13,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:13,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:13,134 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:13,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-03 02:54:13,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:13,349 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:13,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:13,349 INFO L85 PathProgramCache]: Analyzing trace with hash 623825699, now seen corresponding path program 1 times [2022-11-03 02:54:13,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:13,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360817197] [2022-11-03 02:54:13,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:13,351 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:13,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:13,352 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:13,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 02:54:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:13,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:54:13,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:14,491 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 02:54:14,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:14,491 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:14,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360817197] [2022-11-03 02:54:14,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360817197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:14,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:14,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:54:14,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690377018] [2022-11-03 02:54:14,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:14,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:54:14,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:14,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:54:14,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:54:14,494 INFO L87 Difference]: Start difference. First operand 281 states and 380 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:14,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:14,695 INFO L93 Difference]: Finished difference Result 812 states and 1168 transitions. [2022-11-03 02:54:14,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:54:14,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:14,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:14,697 INFO L225 Difference]: With dead ends: 812 [2022-11-03 02:54:14,697 INFO L226 Difference]: Without dead ends: 633 [2022-11-03 02:54:14,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:54:14,698 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 899 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:14,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 1484 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:54:14,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-11-03 02:54:14,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 285. [2022-11-03 02:54:14,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.3556338028169015) internal successors, (385), 284 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 385 transitions. [2022-11-03 02:54:14,704 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 385 transitions. Word has length 182 [2022-11-03 02:54:14,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:14,705 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 385 transitions. [2022-11-03 02:54:14,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:14,705 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 385 transitions. [2022-11-03 02:54:14,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:14,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:14,706 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:14,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:14,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:14,907 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:14,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:14,907 INFO L85 PathProgramCache]: Analyzing trace with hash 650891301, now seen corresponding path program 1 times [2022-11-03 02:54:14,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:14,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152629357] [2022-11-03 02:54:14,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:14,908 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:14,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:14,910 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:14,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 02:54:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:15,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:54:15,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:15,565 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 02:54:15,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:15,565 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:15,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152629357] [2022-11-03 02:54:15,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152629357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:15,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:15,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:54:15,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151050036] [2022-11-03 02:54:15,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:15,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:54:15,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:15,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:54:15,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:54:15,567 INFO L87 Difference]: Start difference. First operand 285 states and 385 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:15,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:15,785 INFO L93 Difference]: Finished difference Result 724 states and 1035 transitions. [2022-11-03 02:54:15,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:54:15,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:15,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:15,791 INFO L225 Difference]: With dead ends: 724 [2022-11-03 02:54:15,791 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 02:54:15,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:54:15,792 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 955 mSDsluCounter, 1340 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:15,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [955 Valid, 1703 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:54:15,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 02:54:15,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 287. [2022-11-03 02:54:15,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.3531468531468531) internal successors, (387), 286 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 387 transitions. [2022-11-03 02:54:15,798 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 387 transitions. Word has length 182 [2022-11-03 02:54:15,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:15,798 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 387 transitions. [2022-11-03 02:54:15,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:15,799 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 387 transitions. [2022-11-03 02:54:15,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:15,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:15,800 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:15,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-11-03 02:54:16,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:16,013 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:16,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:16,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1909971545, now seen corresponding path program 1 times [2022-11-03 02:54:16,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:16,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136104488] [2022-11-03 02:54:16,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:16,014 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:16,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:16,015 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:16,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 02:54:16,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:16,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:54:16,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:16,842 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 02:54:16,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:16,843 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:16,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136104488] [2022-11-03 02:54:16,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136104488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:16,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:16,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:54:16,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898326416] [2022-11-03 02:54:16,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:16,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:54:16,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:16,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:54:16,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:54:16,848 INFO L87 Difference]: Start difference. First operand 287 states and 387 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:17,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:17,040 INFO L93 Difference]: Finished difference Result 820 states and 1178 transitions. [2022-11-03 02:54:17,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:54:17,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:17,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:17,043 INFO L225 Difference]: With dead ends: 820 [2022-11-03 02:54:17,043 INFO L226 Difference]: Without dead ends: 641 [2022-11-03 02:54:17,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:54:17,044 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 902 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:17,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [902 Valid, 1472 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:54:17,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-11-03 02:54:17,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 289. [2022-11-03 02:54:17,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.3506944444444444) internal successors, (389), 288 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:17,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 389 transitions. [2022-11-03 02:54:17,051 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 389 transitions. Word has length 182 [2022-11-03 02:54:17,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:17,052 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 389 transitions. [2022-11-03 02:54:17,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:17,052 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 389 transitions. [2022-11-03 02:54:17,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:17,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:17,054 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:17,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:17,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:17,272 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:17,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:17,272 INFO L85 PathProgramCache]: Analyzing trace with hash 473953193, now seen corresponding path program 1 times [2022-11-03 02:54:17,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:17,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028656819] [2022-11-03 02:54:17,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:17,274 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:17,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:17,275 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:17,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 02:54:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:17,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:54:17,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:18,262 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 02:54:18,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:18,263 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:18,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028656819] [2022-11-03 02:54:18,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028656819] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:18,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:18,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:54:18,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769823259] [2022-11-03 02:54:18,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:18,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:54:18,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:18,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:54:18,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:54:18,265 INFO L87 Difference]: Start difference. First operand 289 states and 389 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:19,271 INFO L93 Difference]: Finished difference Result 1254 states and 1809 transitions. [2022-11-03 02:54:19,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:54:19,271 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:19,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:19,275 INFO L225 Difference]: With dead ends: 1254 [2022-11-03 02:54:19,278 INFO L226 Difference]: Without dead ends: 1075 [2022-11-03 02:54:19,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:54:19,280 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 2437 mSDsluCounter, 3530 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2437 SdHoareTripleChecker+Valid, 3894 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:19,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2437 Valid, 3894 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:54:19,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-11-03 02:54:19,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 339. [2022-11-03 02:54:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.3402366863905326) internal successors, (453), 338 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:19,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 453 transitions. [2022-11-03 02:54:19,292 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 453 transitions. Word has length 182 [2022-11-03 02:54:19,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:19,292 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 453 transitions. [2022-11-03 02:54:19,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:19,293 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 453 transitions. [2022-11-03 02:54:19,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:19,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:19,294 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:19,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:19,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:19,501 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:19,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:19,501 INFO L85 PathProgramCache]: Analyzing trace with hash -493397461, now seen corresponding path program 1 times [2022-11-03 02:54:19,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:19,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [143552210] [2022-11-03 02:54:19,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:19,503 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:19,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:19,504 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:19,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 02:54:19,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:20,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:54:20,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:54:20,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:20,586 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:20,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [143552210] [2022-11-03 02:54:20,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [143552210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:20,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:20,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:54:20,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107643379] [2022-11-03 02:54:20,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:20,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:54:20,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:20,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:54:20,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:54:20,589 INFO L87 Difference]: Start difference. First operand 339 states and 453 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:20,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:20,796 INFO L93 Difference]: Finished difference Result 898 states and 1280 transitions. [2022-11-03 02:54:20,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:54:20,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:20,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:20,801 INFO L225 Difference]: With dead ends: 898 [2022-11-03 02:54:20,801 INFO L226 Difference]: Without dead ends: 693 [2022-11-03 02:54:20,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:54:20,802 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 839 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:20,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [839 Valid, 1447 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:54:20,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-11-03 02:54:20,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 345. [2022-11-03 02:54:20,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.3372093023255813) internal successors, (460), 344 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:20,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 460 transitions. [2022-11-03 02:54:20,812 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 460 transitions. Word has length 182 [2022-11-03 02:54:20,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:20,813 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 460 transitions. [2022-11-03 02:54:20,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:20,813 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 460 transitions. [2022-11-03 02:54:20,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:20,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:20,815 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:20,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:21,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:21,029 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:21,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:21,029 INFO L85 PathProgramCache]: Analyzing trace with hash -986023635, now seen corresponding path program 1 times [2022-11-03 02:54:21,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:21,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791307475] [2022-11-03 02:54:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:21,030 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:21,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:21,031 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:21,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 02:54:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:21,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:54:21,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:21,750 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 02:54:21,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:21,750 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:21,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791307475] [2022-11-03 02:54:21,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791307475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:21,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:21,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:54:21,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492076827] [2022-11-03 02:54:21,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:21,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:54:21,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:21,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:54:21,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:54:21,752 INFO L87 Difference]: Start difference. First operand 345 states and 460 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:22,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:22,193 INFO L93 Difference]: Finished difference Result 828 states and 1174 transitions. [2022-11-03 02:54:22,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:54:22,194 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:22,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:22,196 INFO L225 Difference]: With dead ends: 828 [2022-11-03 02:54:22,196 INFO L226 Difference]: Without dead ends: 623 [2022-11-03 02:54:22,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:54:22,197 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 921 mSDsluCounter, 1212 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 1562 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:22,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [921 Valid, 1562 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:54:22,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-11-03 02:54:22,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 347. [2022-11-03 02:54:22,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.3352601156069364) internal successors, (462), 346 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:22,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 462 transitions. [2022-11-03 02:54:22,206 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 462 transitions. Word has length 182 [2022-11-03 02:54:22,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:22,207 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 462 transitions. [2022-11-03 02:54:22,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:22,207 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 462 transitions. [2022-11-03 02:54:22,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:22,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:22,208 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:22,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-03 02:54:22,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:22,427 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:22,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:22,427 INFO L85 PathProgramCache]: Analyzing trace with hash 2092789935, now seen corresponding path program 1 times [2022-11-03 02:54:22,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:22,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789424990] [2022-11-03 02:54:22,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:22,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:22,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:22,430 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:22,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 02:54:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:22,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:54:22,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:23,326 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 02:54:23,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:23,327 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:23,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789424990] [2022-11-03 02:54:23,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789424990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:23,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:23,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:54:23,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371861923] [2022-11-03 02:54:23,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:23,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:54:23,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:23,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:54:23,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:54:23,329 INFO L87 Difference]: Start difference. First operand 347 states and 462 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:23,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:23,566 INFO L93 Difference]: Finished difference Result 958 states and 1367 transitions. [2022-11-03 02:54:23,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:54:23,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:23,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:23,575 INFO L225 Difference]: With dead ends: 958 [2022-11-03 02:54:23,580 INFO L226 Difference]: Without dead ends: 753 [2022-11-03 02:54:23,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:54:23,582 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 886 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 1465 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:23,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [886 Valid, 1465 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:54:23,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-11-03 02:54:23,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 351. [2022-11-03 02:54:23,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.3342857142857143) internal successors, (467), 350 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:23,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 467 transitions. [2022-11-03 02:54:23,593 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 467 transitions. Word has length 182 [2022-11-03 02:54:23,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:23,594 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 467 transitions. [2022-11-03 02:54:23,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:23,594 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 467 transitions. [2022-11-03 02:54:23,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:23,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:23,595 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:23,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:23,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:23,814 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:23,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:23,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1675393329, now seen corresponding path program 1 times [2022-11-03 02:54:23,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:23,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415804143] [2022-11-03 02:54:23,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:23,816 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:23,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:23,817 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:23,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 02:54:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:24,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:54:24,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:24,931 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 02:54:24,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:24,931 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:24,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415804143] [2022-11-03 02:54:24,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415804143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:24,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:24,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:54:24,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222500884] [2022-11-03 02:54:24,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:24,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:54:24,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:24,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:54:24,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:54:24,933 INFO L87 Difference]: Start difference. First operand 351 states and 467 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:25,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:25,210 INFO L93 Difference]: Finished difference Result 907 states and 1290 transitions. [2022-11-03 02:54:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:54:25,211 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:25,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:25,221 INFO L225 Difference]: With dead ends: 907 [2022-11-03 02:54:25,221 INFO L226 Difference]: Without dead ends: 702 [2022-11-03 02:54:25,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:54:25,222 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 1074 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1074 SdHoareTripleChecker+Valid, 1886 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:25,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1074 Valid, 1886 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:54:25,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-11-03 02:54:25,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 353. [2022-11-03 02:54:25,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.3323863636363635) internal successors, (469), 352 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:25,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 469 transitions. [2022-11-03 02:54:25,231 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 469 transitions. Word has length 182 [2022-11-03 02:54:25,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:25,232 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 469 transitions. [2022-11-03 02:54:25,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:25,232 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 469 transitions. [2022-11-03 02:54:25,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:25,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:25,233 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:25,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:25,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:25,452 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:25,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:25,452 INFO L85 PathProgramCache]: Analyzing trace with hash -657999309, now seen corresponding path program 1 times [2022-11-03 02:54:25,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:25,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437900721] [2022-11-03 02:54:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:25,453 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:25,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:25,454 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:25,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 02:54:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:25,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:54:25,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:26,182 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 02:54:26,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:26,183 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:26,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437900721] [2022-11-03 02:54:26,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437900721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:26,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:26,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:54:26,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581733281] [2022-11-03 02:54:26,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:26,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:54:26,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:26,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:54:26,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:54:26,185 INFO L87 Difference]: Start difference. First operand 353 states and 469 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:26,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:26,605 INFO L93 Difference]: Finished difference Result 828 states and 1171 transitions. [2022-11-03 02:54:26,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:54:26,606 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:26,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:26,607 INFO L225 Difference]: With dead ends: 828 [2022-11-03 02:54:26,608 INFO L226 Difference]: Without dead ends: 623 [2022-11-03 02:54:26,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:54:26,609 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 887 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 1530 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:26,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [887 Valid, 1530 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:54:26,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-11-03 02:54:26,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 357. [2022-11-03 02:54:26,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.3314606741573034) internal successors, (474), 356 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:26,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 474 transitions. [2022-11-03 02:54:26,618 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 474 transitions. Word has length 182 [2022-11-03 02:54:26,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:26,618 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 474 transitions. [2022-11-03 02:54:26,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:26,618 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 474 transitions. [2022-11-03 02:54:26,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:26,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:26,620 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:26,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-11-03 02:54:26,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:26,838 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:26,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:26,839 INFO L85 PathProgramCache]: Analyzing trace with hash 602917941, now seen corresponding path program 1 times [2022-11-03 02:54:26,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:26,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434835396] [2022-11-03 02:54:26,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:26,840 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:26,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:26,841 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:26,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 02:54:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:27,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:54:27,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:27,511 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 02:54:27,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:27,512 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:27,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434835396] [2022-11-03 02:54:27,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434835396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:27,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:27,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:54:27,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496347793] [2022-11-03 02:54:27,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:27,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:54:27,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:27,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:54:27,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:54:27,513 INFO L87 Difference]: Start difference. First operand 357 states and 474 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:27,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:27,726 INFO L93 Difference]: Finished difference Result 828 states and 1170 transitions. [2022-11-03 02:54:27,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:54:27,727 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:27,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:27,728 INFO L225 Difference]: With dead ends: 828 [2022-11-03 02:54:27,728 INFO L226 Difference]: Without dead ends: 623 [2022-11-03 02:54:27,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:54:27,729 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 884 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:27,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 1636 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:54:27,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-11-03 02:54:27,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 359. [2022-11-03 02:54:27,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.329608938547486) internal successors, (476), 358 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:27,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 476 transitions. [2022-11-03 02:54:27,738 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 476 transitions. Word has length 182 [2022-11-03 02:54:27,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:27,739 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 476 transitions. [2022-11-03 02:54:27,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:27,739 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 476 transitions. [2022-11-03 02:54:27,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:27,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:27,740 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:27,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:27,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:27,960 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:27,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:27,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1989703351, now seen corresponding path program 1 times [2022-11-03 02:54:27,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:27,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557370534] [2022-11-03 02:54:27,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:27,962 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:27,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:27,962 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:27,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 02:54:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:28,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:54:28,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:28,850 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 02:54:28,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:28,850 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:28,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557370534] [2022-11-03 02:54:28,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557370534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:28,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:28,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:54:28,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151406086] [2022-11-03 02:54:28,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:28,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:54:28,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:28,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:54:28,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:54:28,852 INFO L87 Difference]: Start difference. First operand 359 states and 476 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:29,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:29,056 INFO L93 Difference]: Finished difference Result 966 states and 1375 transitions. [2022-11-03 02:54:29,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:54:29,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:29,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:29,058 INFO L225 Difference]: With dead ends: 966 [2022-11-03 02:54:29,058 INFO L226 Difference]: Without dead ends: 761 [2022-11-03 02:54:29,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:54:29,059 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 868 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 1457 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:29,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [868 Valid, 1457 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:54:29,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-11-03 02:54:29,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 361. [2022-11-03 02:54:29,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.3277777777777777) internal successors, (478), 360 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:29,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 478 transitions. [2022-11-03 02:54:29,069 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 478 transitions. Word has length 182 [2022-11-03 02:54:29,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:29,070 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 478 transitions. [2022-11-03 02:54:29,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:29,070 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 478 transitions. [2022-11-03 02:54:29,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:29,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:29,071 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:29,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:29,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:29,285 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:29,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:29,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1861363271, now seen corresponding path program 1 times [2022-11-03 02:54:29,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:29,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063411312] [2022-11-03 02:54:29,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:29,287 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:29,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:29,288 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:29,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-03 02:54:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:29,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:54:29,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:30,409 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 02:54:30,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:30,409 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:30,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063411312] [2022-11-03 02:54:30,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063411312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:30,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:30,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:54:30,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100728721] [2022-11-03 02:54:30,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:30,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:54:30,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:30,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:54:30,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:54:30,412 INFO L87 Difference]: Start difference. First operand 361 states and 478 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:30,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:30,624 INFO L93 Difference]: Finished difference Result 927 states and 1316 transitions. [2022-11-03 02:54:30,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:54:30,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:30,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:30,626 INFO L225 Difference]: With dead ends: 927 [2022-11-03 02:54:30,626 INFO L226 Difference]: Without dead ends: 722 [2022-11-03 02:54:30,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:54:30,626 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 814 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:30,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [814 Valid, 1435 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:54:30,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-11-03 02:54:30,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 363. [2022-11-03 02:54:30,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 1.3259668508287292) internal successors, (480), 362 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:30,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 480 transitions. [2022-11-03 02:54:30,633 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 480 transitions. Word has length 182 [2022-11-03 02:54:30,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:30,634 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 480 transitions. [2022-11-03 02:54:30,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:30,634 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 480 transitions. [2022-11-03 02:54:30,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:30,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:30,636 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:30,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:30,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:30,856 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:30,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:30,856 INFO L85 PathProgramCache]: Analyzing trace with hash 405017915, now seen corresponding path program 1 times [2022-11-03 02:54:30,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:30,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22022303] [2022-11-03 02:54:30,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:30,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:30,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:30,859 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:30,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 02:54:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:31,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:54:31,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:31,561 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 02:54:31,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:31,562 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:31,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22022303] [2022-11-03 02:54:31,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22022303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:31,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:31,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:54:31,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146631765] [2022-11-03 02:54:31,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:31,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:54:31,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:31,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:54:31,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:54:31,565 INFO L87 Difference]: Start difference. First operand 363 states and 480 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:31,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:31,787 INFO L93 Difference]: Finished difference Result 828 states and 1167 transitions. [2022-11-03 02:54:31,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:54:31,787 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:31,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:31,789 INFO L225 Difference]: With dead ends: 828 [2022-11-03 02:54:31,789 INFO L226 Difference]: Without dead ends: 623 [2022-11-03 02:54:31,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:54:31,790 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 860 mSDsluCounter, 1223 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:31,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 1615 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:54:31,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-11-03 02:54:31,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 365. [2022-11-03 02:54:31,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.3241758241758241) internal successors, (482), 364 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 482 transitions. [2022-11-03 02:54:31,800 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 482 transitions. Word has length 182 [2022-11-03 02:54:31,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:31,800 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 482 transitions. [2022-11-03 02:54:31,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:31,801 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 482 transitions. [2022-11-03 02:54:31,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:31,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:31,802 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:31,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-11-03 02:54:32,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:32,017 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:32,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:32,017 INFO L85 PathProgramCache]: Analyzing trace with hash 389499197, now seen corresponding path program 1 times [2022-11-03 02:54:32,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:32,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449717485] [2022-11-03 02:54:32,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:32,018 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:32,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:32,019 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:32,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 02:54:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:32,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:54:32,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:33,081 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 02:54:33,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:33,082 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:33,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449717485] [2022-11-03 02:54:33,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449717485] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:33,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:33,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:54:33,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722753927] [2022-11-03 02:54:33,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:33,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:54:33,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:33,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:54:33,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:54:33,084 INFO L87 Difference]: Start difference. First operand 365 states and 482 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:33,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:33,963 INFO L93 Difference]: Finished difference Result 1354 states and 1937 transitions. [2022-11-03 02:54:33,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:54:33,963 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:33,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:33,965 INFO L225 Difference]: With dead ends: 1354 [2022-11-03 02:54:33,965 INFO L226 Difference]: Without dead ends: 1149 [2022-11-03 02:54:33,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:54:33,967 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 2872 mSDsluCounter, 3526 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2872 SdHoareTripleChecker+Valid, 3955 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:33,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2872 Valid, 3955 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:54:33,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-11-03 02:54:33,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 413. [2022-11-03 02:54:33,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.3203883495145632) internal successors, (544), 412 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:33,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 544 transitions. [2022-11-03 02:54:33,977 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 544 transitions. Word has length 182 [2022-11-03 02:54:33,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:33,978 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 544 transitions. [2022-11-03 02:54:33,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:33,978 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 544 transitions. [2022-11-03 02:54:33,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:33,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:33,979 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:33,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Ended with exit code 0 [2022-11-03 02:54:34,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:34,193 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:34,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:34,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1282985535, now seen corresponding path program 1 times [2022-11-03 02:54:34,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:34,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326970983] [2022-11-03 02:54:34,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:34,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:34,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:34,196 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:34,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 02:54:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:34,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:54:34,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:35,191 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 02:54:35,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:35,192 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:35,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326970983] [2022-11-03 02:54:35,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326970983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:35,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:35,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:54:35,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318017950] [2022-11-03 02:54:35,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:35,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:54:35,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:35,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:54:35,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:54:35,193 INFO L87 Difference]: Start difference. First operand 413 states and 544 transitions. Second operand has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:36,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:36,168 INFO L93 Difference]: Finished difference Result 1606 states and 2294 transitions. [2022-11-03 02:54:36,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:54:36,168 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:36,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:36,170 INFO L225 Difference]: With dead ends: 1606 [2022-11-03 02:54:36,170 INFO L226 Difference]: Without dead ends: 1375 [2022-11-03 02:54:36,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:54:36,172 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 2756 mSDsluCounter, 2418 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2756 SdHoareTripleChecker+Valid, 2858 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:36,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2756 Valid, 2858 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:54:36,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2022-11-03 02:54:36,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 493. [2022-11-03 02:54:36,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 1.3252032520325203) internal successors, (652), 492 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:36,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 652 transitions. [2022-11-03 02:54:36,193 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 652 transitions. Word has length 182 [2022-11-03 02:54:36,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:36,193 INFO L495 AbstractCegarLoop]: Abstraction has 493 states and 652 transitions. [2022-11-03 02:54:36,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:36,194 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 652 transitions. [2022-11-03 02:54:36,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:36,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:36,195 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:36,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:36,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:36,416 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:36,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:36,416 INFO L85 PathProgramCache]: Analyzing trace with hash 385592257, now seen corresponding path program 1 times [2022-11-03 02:54:36,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:36,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846921459] [2022-11-03 02:54:36,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:36,418 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:36,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:36,419 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:36,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 02:54:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:36,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:54:36,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:37,467 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 02:54:37,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:37,467 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:37,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846921459] [2022-11-03 02:54:37,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846921459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:37,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:37,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:54:37,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608163321] [2022-11-03 02:54:37,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:37,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:54:37,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:37,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:54:37,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:54:37,469 INFO L87 Difference]: Start difference. First operand 493 states and 652 transitions. Second operand has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:38,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:38,356 INFO L93 Difference]: Finished difference Result 1666 states and 2379 transitions. [2022-11-03 02:54:38,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:54:38,357 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:38,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:38,359 INFO L225 Difference]: With dead ends: 1666 [2022-11-03 02:54:38,359 INFO L226 Difference]: Without dead ends: 1377 [2022-11-03 02:54:38,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:54:38,360 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 2748 mSDsluCounter, 2436 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2748 SdHoareTripleChecker+Valid, 2883 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:38,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2748 Valid, 2883 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:54:38,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2022-11-03 02:54:38,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 495. [2022-11-03 02:54:38,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 1.3238866396761133) internal successors, (654), 494 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:38,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 654 transitions. [2022-11-03 02:54:38,369 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 654 transitions. Word has length 182 [2022-11-03 02:54:38,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:38,370 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 654 transitions. [2022-11-03 02:54:38,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:38,370 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 654 transitions. [2022-11-03 02:54:38,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:38,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:38,371 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:38,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-11-03 02:54:38,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:38,591 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:38,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:38,591 INFO L85 PathProgramCache]: Analyzing trace with hash 809238979, now seen corresponding path program 1 times [2022-11-03 02:54:38,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:38,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271246352] [2022-11-03 02:54:38,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:38,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:38,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:38,594 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:38,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 02:54:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:39,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:54:39,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:39,580 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 02:54:39,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:39,580 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:39,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271246352] [2022-11-03 02:54:39,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271246352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:39,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:39,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:54:39,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043764321] [2022-11-03 02:54:39,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:39,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:54:39,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:39,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:54:39,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:54:39,582 INFO L87 Difference]: Start difference. First operand 495 states and 654 transitions. Second operand has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:40,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:40,483 INFO L93 Difference]: Finished difference Result 1670 states and 2382 transitions. [2022-11-03 02:54:40,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:54:40,483 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:40,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:40,485 INFO L225 Difference]: With dead ends: 1670 [2022-11-03 02:54:40,485 INFO L226 Difference]: Without dead ends: 1379 [2022-11-03 02:54:40,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:54:40,486 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 2742 mSDsluCounter, 2446 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2742 SdHoareTripleChecker+Valid, 2898 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:40,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2742 Valid, 2898 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:54:40,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2022-11-03 02:54:40,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 497. [2022-11-03 02:54:40,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 1.3225806451612903) internal successors, (656), 496 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:40,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 656 transitions. [2022-11-03 02:54:40,500 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 656 transitions. Word has length 182 [2022-11-03 02:54:40,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:40,500 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 656 transitions. [2022-11-03 02:54:40,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:40,501 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 656 transitions. [2022-11-03 02:54:40,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:40,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:40,502 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:40,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:40,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:40,721 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:40,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:40,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1036128187, now seen corresponding path program 1 times [2022-11-03 02:54:40,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:40,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375605889] [2022-11-03 02:54:40,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:40,723 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:40,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:40,724 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:40,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 02:54:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:41,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:54:41,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:41,745 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 02:54:41,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:41,745 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:41,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375605889] [2022-11-03 02:54:41,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375605889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:41,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:41,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:54:41,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805069670] [2022-11-03 02:54:41,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:41,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:54:41,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:41,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:54:41,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:54:41,747 INFO L87 Difference]: Start difference. First operand 497 states and 656 transitions. Second operand has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:42,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:42,655 INFO L93 Difference]: Finished difference Result 1674 states and 2385 transitions. [2022-11-03 02:54:42,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:54:42,655 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:42,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:42,657 INFO L225 Difference]: With dead ends: 1674 [2022-11-03 02:54:42,657 INFO L226 Difference]: Without dead ends: 1381 [2022-11-03 02:54:42,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:54:42,658 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 2736 mSDsluCounter, 2456 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2736 SdHoareTripleChecker+Valid, 2913 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:42,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2736 Valid, 2913 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:54:42,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2022-11-03 02:54:42,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 499. [2022-11-03 02:54:42,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 1.321285140562249) internal successors, (658), 498 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:42,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 658 transitions. [2022-11-03 02:54:42,671 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 658 transitions. Word has length 182 [2022-11-03 02:54:42,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:42,671 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 658 transitions. [2022-11-03 02:54:42,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:42,672 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 658 transitions. [2022-11-03 02:54:42,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:42,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:42,673 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:42,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:42,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:42,889 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:42,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:42,889 INFO L85 PathProgramCache]: Analyzing trace with hash -376596665, now seen corresponding path program 1 times [2022-11-03 02:54:42,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:42,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004371332] [2022-11-03 02:54:42,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:42,890 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:42,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:42,892 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:42,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-03 02:54:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:43,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:54:43,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:44,108 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 02:54:44,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:44,109 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:44,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004371332] [2022-11-03 02:54:44,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004371332] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:44,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:44,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:54:44,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335074524] [2022-11-03 02:54:44,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:44,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:54:44,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:44,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:54:44,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:54:44,110 INFO L87 Difference]: Start difference. First operand 499 states and 658 transitions. Second operand has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:45,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:45,043 INFO L93 Difference]: Finished difference Result 1678 states and 2388 transitions. [2022-11-03 02:54:45,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:54:45,043 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:45,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:45,045 INFO L225 Difference]: With dead ends: 1678 [2022-11-03 02:54:45,045 INFO L226 Difference]: Without dead ends: 1383 [2022-11-03 02:54:45,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:54:45,048 INFO L413 NwaCegarLoop]: 462 mSDtfsCounter, 2730 mSDsluCounter, 2466 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2730 SdHoareTripleChecker+Valid, 2928 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:45,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2730 Valid, 2928 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:54:45,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2022-11-03 02:54:45,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 501. [2022-11-03 02:54:45,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.32) internal successors, (660), 500 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:45,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 660 transitions. [2022-11-03 02:54:45,062 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 660 transitions. Word has length 182 [2022-11-03 02:54:45,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:45,063 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 660 transitions. [2022-11-03 02:54:45,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:45,063 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 660 transitions. [2022-11-03 02:54:45,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:45,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:45,065 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:45,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-11-03 02:54:45,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:45,281 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:45,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:45,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1220602167, now seen corresponding path program 1 times [2022-11-03 02:54:45,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:45,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1414892288] [2022-11-03 02:54:45,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:45,282 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:45,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:45,283 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:45,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 02:54:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:45,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:54:45,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:46,332 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 02:54:46,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:46,332 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:46,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1414892288] [2022-11-03 02:54:46,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1414892288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:46,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:46,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:54:46,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095891851] [2022-11-03 02:54:46,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:46,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:54:46,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:46,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:54:46,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:54:46,335 INFO L87 Difference]: Start difference. First operand 501 states and 660 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:47,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:47,483 INFO L93 Difference]: Finished difference Result 1818 states and 2593 transitions. [2022-11-03 02:54:47,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:54:47,483 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:47,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:47,485 INFO L225 Difference]: With dead ends: 1818 [2022-11-03 02:54:47,485 INFO L226 Difference]: Without dead ends: 1521 [2022-11-03 02:54:47,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:54:47,486 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 3020 mSDsluCounter, 3154 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3020 SdHoareTripleChecker+Valid, 3627 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:47,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3020 Valid, 3627 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:54:47,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2022-11-03 02:54:47,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 505. [2022-11-03 02:54:47,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.3194444444444444) internal successors, (665), 504 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:47,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 665 transitions. [2022-11-03 02:54:47,506 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 665 transitions. Word has length 182 [2022-11-03 02:54:47,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:47,506 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 665 transitions. [2022-11-03 02:54:47,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:47,506 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 665 transitions. [2022-11-03 02:54:47,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:47,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:47,508 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:47,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-11-03 02:54:47,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:47,717 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:47,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:47,717 INFO L85 PathProgramCache]: Analyzing trace with hash -519002293, now seen corresponding path program 1 times [2022-11-03 02:54:47,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:47,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297862234] [2022-11-03 02:54:47,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:47,718 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:47,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:47,719 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:47,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-03 02:54:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:48,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:54:48,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:48,812 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 02:54:48,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:48,813 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:48,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297862234] [2022-11-03 02:54:48,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297862234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:48,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:48,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:54:48,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637979542] [2022-11-03 02:54:48,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:48,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:54:48,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:48,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:54:48,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:54:48,815 INFO L87 Difference]: Start difference. First operand 505 states and 665 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:49,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:49,976 INFO L93 Difference]: Finished difference Result 1830 states and 2607 transitions. [2022-11-03 02:54:49,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:54:49,977 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:49,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:49,978 INFO L225 Difference]: With dead ends: 1830 [2022-11-03 02:54:49,979 INFO L226 Difference]: Without dead ends: 1529 [2022-11-03 02:54:49,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:54:49,980 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 3017 mSDsluCounter, 3167 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3017 SdHoareTripleChecker+Valid, 3645 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:49,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3017 Valid, 3645 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:54:49,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2022-11-03 02:54:49,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 507. [2022-11-03 02:54:49,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 1.3181818181818181) internal successors, (667), 506 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:49,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 667 transitions. [2022-11-03 02:54:49,995 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 667 transitions. Word has length 182 [2022-11-03 02:54:49,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:49,995 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 667 transitions. [2022-11-03 02:54:49,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:49,995 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 667 transitions. [2022-11-03 02:54:49,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:49,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:49,997 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:50,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:50,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:50,209 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:50,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:50,209 INFO L85 PathProgramCache]: Analyzing trace with hash 867201101, now seen corresponding path program 1 times [2022-11-03 02:54:50,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:50,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485020599] [2022-11-03 02:54:50,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:50,211 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:50,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:50,215 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:50,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 02:54:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:50,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:54:50,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:51,280 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 02:54:51,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:51,280 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:51,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485020599] [2022-11-03 02:54:51,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485020599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:51,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:51,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:54:51,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706794017] [2022-11-03 02:54:51,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:51,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:54:51,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:51,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:54:51,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:54:51,282 INFO L87 Difference]: Start difference. First operand 507 states and 667 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:52,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:52,436 INFO L93 Difference]: Finished difference Result 1840 states and 2618 transitions. [2022-11-03 02:54:52,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:54:52,437 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:52,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:52,439 INFO L225 Difference]: With dead ends: 1840 [2022-11-03 02:54:52,439 INFO L226 Difference]: Without dead ends: 1537 [2022-11-03 02:54:52,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:54:52,441 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 3014 mSDsluCounter, 3180 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3014 SdHoareTripleChecker+Valid, 3663 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:52,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3014 Valid, 3663 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:54:52,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2022-11-03 02:54:52,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 509. [2022-11-03 02:54:52,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 1.3169291338582678) internal successors, (669), 508 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:52,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 669 transitions. [2022-11-03 02:54:52,457 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 669 transitions. Word has length 182 [2022-11-03 02:54:52,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:52,457 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 669 transitions. [2022-11-03 02:54:52,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:52,458 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 669 transitions. [2022-11-03 02:54:52,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:52,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:52,459 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:52,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:52,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:52,674 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:52,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:52,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1504538161, now seen corresponding path program 1 times [2022-11-03 02:54:52,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:52,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823471058] [2022-11-03 02:54:52,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:52,676 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:52,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:52,678 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:52,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-03 02:54:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:53,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:54:53,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:53,767 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 02:54:53,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:53,767 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:53,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823471058] [2022-11-03 02:54:53,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823471058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:53,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:53,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:54:53,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993784751] [2022-11-03 02:54:53,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:53,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:54:53,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:53,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:54:53,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:54:53,769 INFO L87 Difference]: Start difference. First operand 509 states and 669 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:54,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:54,917 INFO L93 Difference]: Finished difference Result 1850 states and 2629 transitions. [2022-11-03 02:54:54,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:54:54,918 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:54,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:54,920 INFO L225 Difference]: With dead ends: 1850 [2022-11-03 02:54:54,920 INFO L226 Difference]: Without dead ends: 1545 [2022-11-03 02:54:54,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:54:54,922 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 3011 mSDsluCounter, 3193 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3011 SdHoareTripleChecker+Valid, 3681 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:54,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3011 Valid, 3681 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:54:54,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2022-11-03 02:54:54,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 511. [2022-11-03 02:54:54,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 1.315686274509804) internal successors, (671), 510 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:54,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 671 transitions. [2022-11-03 02:54:54,935 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 671 transitions. Word has length 182 [2022-11-03 02:54:54,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:54,935 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 671 transitions. [2022-11-03 02:54:54,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:54,936 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 671 transitions. [2022-11-03 02:54:54,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:54,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:54,937 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:54,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:55,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:55,157 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:55,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:55,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1363989551, now seen corresponding path program 1 times [2022-11-03 02:54:55,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:55,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1493110183] [2022-11-03 02:54:55,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:55,159 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:55,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:55,161 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:55,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-03 02:54:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:55,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:54:55,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:56,445 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 02:54:56,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:56,445 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:56,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1493110183] [2022-11-03 02:54:56,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1493110183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:56,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:56,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:54:56,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674737725] [2022-11-03 02:54:56,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:56,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:54:56,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:56,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:54:56,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:54:56,448 INFO L87 Difference]: Start difference. First operand 511 states and 671 transitions. Second operand has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:57,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:57,445 INFO L93 Difference]: Finished difference Result 1702 states and 2409 transitions. [2022-11-03 02:54:57,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:54:57,446 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:54:57,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:57,448 INFO L225 Difference]: With dead ends: 1702 [2022-11-03 02:54:57,449 INFO L226 Difference]: Without dead ends: 1395 [2022-11-03 02:54:57,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:54:57,450 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 2698 mSDsluCounter, 2528 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2698 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:57,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2698 Valid, 3021 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:54:57,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2022-11-03 02:54:57,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 513. [2022-11-03 02:54:57,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.314453125) internal successors, (673), 512 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:57,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 673 transitions. [2022-11-03 02:54:57,465 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 673 transitions. Word has length 182 [2022-11-03 02:54:57,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:57,466 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 673 transitions. [2022-11-03 02:54:57,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:57,466 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 673 transitions. [2022-11-03 02:54:57,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:54:57,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:57,467 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:57,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-03 02:54:57,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:57,687 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:57,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:57,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1125539411, now seen corresponding path program 1 times [2022-11-03 02:54:57,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:57,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1073899235] [2022-11-03 02:54:57,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:57,689 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:57,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:57,690 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:57,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-03 02:54:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:58,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:54:58,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:58,814 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 02:54:58,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:54:58,814 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:58,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1073899235] [2022-11-03 02:54:58,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1073899235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:58,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:58,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:54:58,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817487861] [2022-11-03 02:54:58,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:58,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:54:58,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:58,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:54:58,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:54:58,816 INFO L87 Difference]: Start difference. First operand 513 states and 673 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:00,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:00,014 INFO L93 Difference]: Finished difference Result 1840 states and 2611 transitions. [2022-11-03 02:55:00,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:55:00,014 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:55:00,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:00,017 INFO L225 Difference]: With dead ends: 1840 [2022-11-03 02:55:00,017 INFO L226 Difference]: Without dead ends: 1531 [2022-11-03 02:55:00,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:55:00,018 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 2985 mSDsluCounter, 3214 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2985 SdHoareTripleChecker+Valid, 3712 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:00,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2985 Valid, 3712 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:55:00,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2022-11-03 02:55:00,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 515. [2022-11-03 02:55:00,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.3132295719844358) internal successors, (675), 514 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:00,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 675 transitions. [2022-11-03 02:55:00,035 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 675 transitions. Word has length 182 [2022-11-03 02:55:00,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:00,035 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 675 transitions. [2022-11-03 02:55:00,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:00,035 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 675 transitions. [2022-11-03 02:55:00,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:55:00,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:00,037 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:00,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-11-03 02:55:00,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:55:00,245 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:00,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:00,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1548241237, now seen corresponding path program 1 times [2022-11-03 02:55:00,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:00,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [898761671] [2022-11-03 02:55:00,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:00,246 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:00,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:00,248 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:00,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-03 02:55:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:00,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:55:00,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:01,348 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 02:55:01,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:55:01,349 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:55:01,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [898761671] [2022-11-03 02:55:01,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [898761671] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:55:01,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:55:01,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:55:01,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664210053] [2022-11-03 02:55:01,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:55:01,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:55:01,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:01,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:55:01,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:55:01,351 INFO L87 Difference]: Start difference. First operand 515 states and 675 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:02,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:02,531 INFO L93 Difference]: Finished difference Result 1850 states and 2622 transitions. [2022-11-03 02:55:02,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:55:02,532 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:55:02,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:02,535 INFO L225 Difference]: With dead ends: 1850 [2022-11-03 02:55:02,535 INFO L226 Difference]: Without dead ends: 1539 [2022-11-03 02:55:02,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:55:02,537 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 2982 mSDsluCounter, 3227 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2982 SdHoareTripleChecker+Valid, 3730 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:02,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2982 Valid, 3730 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:55:02,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2022-11-03 02:55:02,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 517. [2022-11-03 02:55:02,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.312015503875969) internal successors, (677), 516 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:02,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 677 transitions. [2022-11-03 02:55:02,553 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 677 transitions. Word has length 182 [2022-11-03 02:55:02,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:02,553 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 677 transitions. [2022-11-03 02:55:02,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:02,554 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 677 transitions. [2022-11-03 02:55:02,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:55:02,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:02,555 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:02,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Ended with exit code 0 [2022-11-03 02:55:02,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:55:02,775 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:02,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:02,776 INFO L85 PathProgramCache]: Analyzing trace with hash -140702505, now seen corresponding path program 1 times [2022-11-03 02:55:02,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:02,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542952622] [2022-11-03 02:55:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:02,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:02,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:02,779 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:02,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 02:55:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:03,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:55:03,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:03,954 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 02:55:03,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:55:03,954 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:55:03,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542952622] [2022-11-03 02:55:03,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542952622] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:55:03,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:55:03,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:55:03,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183740818] [2022-11-03 02:55:03,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:55:03,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:55:03,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:03,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:55:03,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:55:03,956 INFO L87 Difference]: Start difference. First operand 517 states and 677 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:05,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:05,178 INFO L93 Difference]: Finished difference Result 1860 states and 2633 transitions. [2022-11-03 02:55:05,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:55:05,179 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:55:05,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:05,181 INFO L225 Difference]: With dead ends: 1860 [2022-11-03 02:55:05,181 INFO L226 Difference]: Without dead ends: 1547 [2022-11-03 02:55:05,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:55:05,182 INFO L413 NwaCegarLoop]: 508 mSDtfsCounter, 2979 mSDsluCounter, 3240 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2979 SdHoareTripleChecker+Valid, 3748 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:05,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2979 Valid, 3748 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:55:05,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2022-11-03 02:55:05,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 519. [2022-11-03 02:55:05,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 1.3108108108108107) internal successors, (679), 518 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:05,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 679 transitions. [2022-11-03 02:55:05,195 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 679 transitions. Word has length 182 [2022-11-03 02:55:05,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:05,196 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 679 transitions. [2022-11-03 02:55:05,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:05,196 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 679 transitions. [2022-11-03 02:55:05,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:55:05,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:05,197 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:05,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-11-03 02:55:05,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:55:05,413 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:05,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:05,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1729050407, now seen corresponding path program 1 times [2022-11-03 02:55:05,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:05,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32983683] [2022-11-03 02:55:05,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:05,414 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:05,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:05,415 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:05,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-03 02:55:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:05,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:55:05,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:06,555 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 02:55:06,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:55:06,555 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:55:06,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32983683] [2022-11-03 02:55:06,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32983683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:55:06,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:55:06,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:55:06,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770266895] [2022-11-03 02:55:06,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:55:06,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:55:06,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:06,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:55:06,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:55:06,557 INFO L87 Difference]: Start difference. First operand 519 states and 679 transitions. Second operand has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:07,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:07,693 INFO L93 Difference]: Finished difference Result 1720 states and 2424 transitions. [2022-11-03 02:55:07,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:55:07,693 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:55:07,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:07,695 INFO L225 Difference]: With dead ends: 1720 [2022-11-03 02:55:07,695 INFO L226 Difference]: Without dead ends: 1405 [2022-11-03 02:55:07,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:55:07,696 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 2672 mSDsluCounter, 2580 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2672 SdHoareTripleChecker+Valid, 3099 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:07,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2672 Valid, 3099 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:55:07,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2022-11-03 02:55:07,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 523. [2022-11-03 02:55:07,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 1.3103448275862069) internal successors, (684), 522 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:07,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 684 transitions. [2022-11-03 02:55:07,710 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 684 transitions. Word has length 182 [2022-11-03 02:55:07,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:07,710 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 684 transitions. [2022-11-03 02:55:07,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:07,710 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 684 transitions. [2022-11-03 02:55:07,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:55:07,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:07,711 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:07,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:07,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:55:07,912 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:07,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:07,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1979110875, now seen corresponding path program 1 times [2022-11-03 02:55:07,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:07,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562131864] [2022-11-03 02:55:07,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:07,914 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:07,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:07,915 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:07,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-03 02:55:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:08,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:55:08,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:09,046 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 02:55:09,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:55:09,046 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:55:09,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562131864] [2022-11-03 02:55:09,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562131864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:55:09,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:55:09,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:55:09,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092831590] [2022-11-03 02:55:09,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:55:09,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:55:09,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:09,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:55:09,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:55:09,048 INFO L87 Difference]: Start difference. First operand 523 states and 684 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:10,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:10,229 INFO L93 Difference]: Finished difference Result 1860 states and 2629 transitions. [2022-11-03 02:55:10,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:55:10,229 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:55:10,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:10,231 INFO L225 Difference]: With dead ends: 1860 [2022-11-03 02:55:10,232 INFO L226 Difference]: Without dead ends: 1541 [2022-11-03 02:55:10,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:55:10,233 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 2955 mSDsluCounter, 3276 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2955 SdHoareTripleChecker+Valid, 3800 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:10,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2955 Valid, 3800 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:55:10,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2022-11-03 02:55:10,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 525. [2022-11-03 02:55:10,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 1.3091603053435115) internal successors, (686), 524 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:10,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 686 transitions. [2022-11-03 02:55:10,249 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 686 transitions. Word has length 182 [2022-11-03 02:55:10,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:10,250 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 686 transitions. [2022-11-03 02:55:10,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:10,250 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 686 transitions. [2022-11-03 02:55:10,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:55:10,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:10,251 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:10,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:10,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:55:10,471 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:10,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:10,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1614791843, now seen corresponding path program 1 times [2022-11-03 02:55:10,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:10,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830000061] [2022-11-03 02:55:10,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:10,473 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:10,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:10,474 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:10,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 02:55:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:10,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:55:10,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:11,599 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 02:55:11,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:55:11,600 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:55:11,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830000061] [2022-11-03 02:55:11,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830000061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:55:11,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:55:11,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:55:11,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927547357] [2022-11-03 02:55:11,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:55:11,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:55:11,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:11,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:55:11,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:55:11,602 INFO L87 Difference]: Start difference. First operand 525 states and 686 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:12,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:12,794 INFO L93 Difference]: Finished difference Result 1870 states and 2640 transitions. [2022-11-03 02:55:12,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:55:12,795 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:55:12,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:12,797 INFO L225 Difference]: With dead ends: 1870 [2022-11-03 02:55:12,797 INFO L226 Difference]: Without dead ends: 1549 [2022-11-03 02:55:12,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:55:12,798 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 2952 mSDsluCounter, 3289 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2952 SdHoareTripleChecker+Valid, 3818 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:12,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2952 Valid, 3818 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:55:12,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1549 states. [2022-11-03 02:55:12,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1549 to 527. [2022-11-03 02:55:12,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 1.3079847908745248) internal successors, (688), 526 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:12,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 688 transitions. [2022-11-03 02:55:12,812 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 688 transitions. Word has length 182 [2022-11-03 02:55:12,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:12,812 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 688 transitions. [2022-11-03 02:55:12,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:12,813 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 688 transitions. [2022-11-03 02:55:12,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:55:12,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:12,814 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:12,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-03 02:55:13,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:55:13,017 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:13,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:13,017 INFO L85 PathProgramCache]: Analyzing trace with hash -934733473, now seen corresponding path program 1 times [2022-11-03 02:55:13,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:13,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538729640] [2022-11-03 02:55:13,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:13,019 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:13,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:13,020 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:13,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-03 02:55:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:13,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:55:13,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:14,140 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 02:55:14,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:55:14,140 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:55:14,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538729640] [2022-11-03 02:55:14,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538729640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:55:14,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:55:14,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:55:14,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774412926] [2022-11-03 02:55:14,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:55:14,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:55:14,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:14,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:55:14,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:55:14,142 INFO L87 Difference]: Start difference. First operand 527 states and 688 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:15,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:15,356 INFO L93 Difference]: Finished difference Result 1880 states and 2651 transitions. [2022-11-03 02:55:15,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:55:15,357 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:55:15,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:15,359 INFO L225 Difference]: With dead ends: 1880 [2022-11-03 02:55:15,359 INFO L226 Difference]: Without dead ends: 1557 [2022-11-03 02:55:15,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:55:15,360 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 2949 mSDsluCounter, 3302 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2949 SdHoareTripleChecker+Valid, 3836 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:15,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2949 Valid, 3836 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:55:15,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2022-11-03 02:55:15,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 529. [2022-11-03 02:55:15,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 1.3068181818181819) internal successors, (690), 528 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:15,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 690 transitions. [2022-11-03 02:55:15,376 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 690 transitions. Word has length 182 [2022-11-03 02:55:15,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:15,376 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 690 transitions. [2022-11-03 02:55:15,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:15,377 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 690 transitions. [2022-11-03 02:55:15,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:55:15,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:15,381 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:15,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:15,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:55:15,601 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:15,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:15,601 INFO L85 PathProgramCache]: Analyzing trace with hash 840273889, now seen corresponding path program 1 times [2022-11-03 02:55:15,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:15,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769257266] [2022-11-03 02:55:15,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:15,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:15,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:15,604 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:15,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-03 02:55:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:16,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:55:16,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:16,749 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 02:55:16,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:55:16,750 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:55:16,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769257266] [2022-11-03 02:55:16,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769257266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:55:16,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:55:16,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:55:16,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692169686] [2022-11-03 02:55:16,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:55:16,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:55:16,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:16,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:55:16,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:55:16,751 INFO L87 Difference]: Start difference. First operand 529 states and 690 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:17,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:17,953 INFO L93 Difference]: Finished difference Result 1890 states and 2662 transitions. [2022-11-03 02:55:17,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:55:17,953 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 02:55:17,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:17,954 INFO L225 Difference]: With dead ends: 1890 [2022-11-03 02:55:17,954 INFO L226 Difference]: Without dead ends: 1565 [2022-11-03 02:55:17,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:55:17,955 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 2946 mSDsluCounter, 3315 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2946 SdHoareTripleChecker+Valid, 3854 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:17,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2946 Valid, 3854 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:55:17,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2022-11-03 02:55:17,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 531. [2022-11-03 02:55:17,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.3056603773584905) internal successors, (692), 530 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:17,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 692 transitions. [2022-11-03 02:55:17,965 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 692 transitions. Word has length 182 [2022-11-03 02:55:17,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:17,966 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 692 transitions. [2022-11-03 02:55:17,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:17,966 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 692 transitions. [2022-11-03 02:55:17,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:55:17,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:17,967 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:17,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-03 02:55:18,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:55:18,169 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:18,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:18,169 INFO L85 PathProgramCache]: Analyzing trace with hash 842120931, now seen corresponding path program 1 times [2022-11-03 02:55:18,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:18,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239909805] [2022-11-03 02:55:18,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:18,170 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:18,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:18,171 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:18,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-03 02:55:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:18,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:55:18,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:55:19,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:55:20,641 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:55:20,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239909805] [2022-11-03 02:55:20,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239909805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:20,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1103531964] [2022-11-03 02:55:20,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:20,642 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:55:20,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:55:20,648 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:55:20,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2022-11-03 02:55:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:21,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:55:21,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:55:22,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:55:23,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1103531964] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:23,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8449368] [2022-11-03 02:55:23,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:23,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:55:23,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:55:23,466 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:55:23,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-11-03 02:55:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:23,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:55:23,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:55:24,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:25,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:55:25,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8449368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:25,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:55:25,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 8] total 14 [2022-11-03 02:55:25,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013439644] [2022-11-03 02:55:25,937 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:55:25,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:55:25,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:25,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:55:25,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:55:25,940 INFO L87 Difference]: Start difference. First operand 531 states and 692 transitions. Second operand has 14 states, 14 states have (on average 26.142857142857142) internal successors, (366), 14 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:26,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:26,557 INFO L93 Difference]: Finished difference Result 1184 states and 1622 transitions. [2022-11-03 02:55:26,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:55:26,557 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 26.142857142857142) internal successors, (366), 14 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 02:55:26,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:26,558 INFO L225 Difference]: With dead ends: 1184 [2022-11-03 02:55:26,558 INFO L226 Difference]: Without dead ends: 1182 [2022-11-03 02:55:26,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1093 GetRequests, 1069 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:55:26,559 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 2489 mSDsluCounter, 1683 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2489 SdHoareTripleChecker+Valid, 2142 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:26,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2489 Valid, 2142 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 133 Invalid, 0 Unknown, 215 Unchecked, 0.4s Time] [2022-11-03 02:55:26,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2022-11-03 02:55:26,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 856. [2022-11-03 02:55:26,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 1.352046783625731) internal successors, (1156), 855 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:26,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1156 transitions. [2022-11-03 02:55:26,574 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1156 transitions. Word has length 182 [2022-11-03 02:55:26,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:26,574 INFO L495 AbstractCegarLoop]: Abstraction has 856 states and 1156 transitions. [2022-11-03 02:55:26,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 26.142857142857142) internal successors, (366), 14 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:26,574 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1156 transitions. [2022-11-03 02:55:26,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 02:55:26,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:26,577 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:26,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:26,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-11-03 02:55:26,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (73)] Ended with exit code 0 [2022-11-03 02:55:27,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:55:27,178 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:27,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:27,179 INFO L85 PathProgramCache]: Analyzing trace with hash -613634109, now seen corresponding path program 1 times [2022-11-03 02:55:27,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:27,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713441806] [2022-11-03 02:55:27,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:27,181 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:27,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:27,182 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:27,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-03 02:55:27,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:28,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:55:28,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:55:28,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:55:29,616 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:55:29,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713441806] [2022-11-03 02:55:29,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713441806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:29,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [545095228] [2022-11-03 02:55:29,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:29,617 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:55:29,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:55:29,621 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:55:29,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (76)] Waiting until timeout for monitored process [2022-11-03 02:55:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:30,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:55:30,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:55:31,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:55:31,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [545095228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:55:31,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:55:31,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 02:55:31,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397703727] [2022-11-03 02:55:31,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:55:31,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:55:31,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:31,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:55:31,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:55:31,012 INFO L87 Difference]: Start difference. First operand 856 states and 1156 transitions. Second operand has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 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 02:55:31,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:31,198 INFO L93 Difference]: Finished difference Result 3016 states and 4188 transitions. [2022-11-03 02:55:31,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:55:31,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 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) Word has length 359 [2022-11-03 02:55:31,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:31,201 INFO L225 Difference]: With dead ends: 3016 [2022-11-03 02:55:31,201 INFO L226 Difference]: Without dead ends: 2364 [2022-11-03 02:55:31,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1063 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:55:31,203 INFO L413 NwaCegarLoop]: 692 mSDtfsCounter, 865 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 1519 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:31,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [865 Valid, 1519 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:55:31,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2022-11-03 02:55:31,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 916. [2022-11-03 02:55:31,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 1.3595628415300547) internal successors, (1244), 915 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:31,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1244 transitions. [2022-11-03 02:55:31,221 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1244 transitions. Word has length 359 [2022-11-03 02:55:31,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:31,221 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1244 transitions. [2022-11-03 02:55:31,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 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 02:55:31,221 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1244 transitions. [2022-11-03 02:55:31,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 02:55:31,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:31,223 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:31,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (75)] Ended with exit code 0 [2022-11-03 02:55:31,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (76)] Ended with exit code 0 [2022-11-03 02:55:31,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:55:31,624 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:31,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:31,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1040188607, now seen corresponding path program 1 times [2022-11-03 02:55:31,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:31,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009891252] [2022-11-03 02:55:31,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:31,626 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:31,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:31,627 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:31,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-03 02:55:32,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:32,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:55:32,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:55:33,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:55:33,943 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:55:33,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009891252] [2022-11-03 02:55:33,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1009891252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:33,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1302327698] [2022-11-03 02:55:33,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:33,944 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:55:33,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:55:33,945 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:55:33,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2022-11-03 02:55:35,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:35,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:55:35,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:55:35,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:55:35,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1302327698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:55:35,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:55:35,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 02:55:35,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111096839] [2022-11-03 02:55:35,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:55:35,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:55:35,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:35,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:55:35,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:55:35,309 INFO L87 Difference]: Start difference. First operand 916 states and 1244 transitions. Second operand has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 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 02:55:35,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:35,483 INFO L93 Difference]: Finished difference Result 3090 states and 4297 transitions. [2022-11-03 02:55:35,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:55:35,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 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) Word has length 359 [2022-11-03 02:55:35,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:35,486 INFO L225 Difference]: With dead ends: 3090 [2022-11-03 02:55:35,487 INFO L226 Difference]: Without dead ends: 2378 [2022-11-03 02:55:35,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1063 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:55:35,488 INFO L413 NwaCegarLoop]: 695 mSDtfsCounter, 866 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:35,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 1537 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:55:35,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2022-11-03 02:55:35,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 944. [2022-11-03 02:55:35,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 1.3616118769883352) internal successors, (1284), 943 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:35,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1284 transitions. [2022-11-03 02:55:35,514 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1284 transitions. Word has length 359 [2022-11-03 02:55:35,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:35,514 INFO L495 AbstractCegarLoop]: Abstraction has 944 states and 1284 transitions. [2022-11-03 02:55:35,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 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 02:55:35,515 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1284 transitions. [2022-11-03 02:55:35,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 02:55:35,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:35,518 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:35,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-11-03 02:55:35,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (78)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:35,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:55:35,942 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:35,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:35,943 INFO L85 PathProgramCache]: Analyzing trace with hash -92136641, now seen corresponding path program 1 times [2022-11-03 02:55:35,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:35,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426387486] [2022-11-03 02:55:35,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:35,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:35,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:35,946 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:35,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-03 02:55:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:36,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:55:36,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:55:37,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:38,060 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:55:38,060 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:55:38,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426387486] [2022-11-03 02:55:38,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1426387486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:38,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [750796064] [2022-11-03 02:55:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:38,061 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:55:38,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:55:38,062 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:55:38,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2022-11-03 02:55:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:39,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:55:39,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-03 02:55:39,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:55:39,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [750796064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:55:39,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:55:39,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 02:55:39,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541774006] [2022-11-03 02:55:39,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:55:39,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:55:39,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:39,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:55:39,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:55:39,427 INFO L87 Difference]: Start difference. First operand 944 states and 1284 transitions. Second operand has 5 states, 5 states have (on average 59.6) internal successors, (298), 5 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:39,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:39,541 INFO L93 Difference]: Finished difference Result 3006 states and 4221 transitions. [2022-11-03 02:55:39,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:55:39,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 59.6) internal successors, (298), 5 states have internal predecessors, (298), 0 states have call successors, (0), 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 359 [2022-11-03 02:55:39,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:39,543 INFO L225 Difference]: With dead ends: 3006 [2022-11-03 02:55:39,544 INFO L226 Difference]: Without dead ends: 2244 [2022-11-03 02:55:39,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1063 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:55:39,545 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 1472 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1472 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:39,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1472 Valid, 1296 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:55:39,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2022-11-03 02:55:39,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 972. [2022-11-03 02:55:39,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.357363542739444) internal successors, (1318), 971 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:39,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1318 transitions. [2022-11-03 02:55:39,588 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1318 transitions. Word has length 359 [2022-11-03 02:55:39,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:39,589 INFO L495 AbstractCegarLoop]: Abstraction has 972 states and 1318 transitions. [2022-11-03 02:55:39,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.6) internal successors, (298), 5 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:39,589 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1318 transitions. [2022-11-03 02:55:39,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 02:55:39,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:39,592 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:39,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:39,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (80)] Ended with exit code 0 [2022-11-03 02:55:39,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:55:39,997 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:39,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:39,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1059487295, now seen corresponding path program 1 times [2022-11-03 02:55:39,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:39,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828476106] [2022-11-03 02:55:39,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:39,999 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:39,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:40,000 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:40,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-03 02:55:40,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:40,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:55:40,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:55:41,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:55:42,206 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:55:42,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828476106] [2022-11-03 02:55:42,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828476106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:42,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [239713237] [2022-11-03 02:55:42,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:42,207 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:55:42,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:55:42,208 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:55:42,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2022-11-03 02:55:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:43,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:55:43,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:55:43,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:55:43,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [239713237] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:55:43,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:55:43,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 02:55:43,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741093208] [2022-11-03 02:55:43,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:55:43,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:55:43,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:43,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:55:43,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:55:43,629 INFO L87 Difference]: Start difference. First operand 972 states and 1318 transitions. Second operand has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:43,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:43,825 INFO L93 Difference]: Finished difference Result 3670 states and 5155 transitions. [2022-11-03 02:55:43,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:55:43,826 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 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 359 [2022-11-03 02:55:43,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:43,847 INFO L225 Difference]: With dead ends: 3670 [2022-11-03 02:55:43,847 INFO L226 Difference]: Without dead ends: 2910 [2022-11-03 02:55:43,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1063 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:55:43,849 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 884 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:43,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 1615 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:55:43,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2022-11-03 02:55:43,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 1376. [2022-11-03 02:55:43,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 1.3847272727272728) internal successors, (1904), 1375 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:43,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 1904 transitions. [2022-11-03 02:55:43,898 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 1904 transitions. Word has length 359 [2022-11-03 02:55:43,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:43,899 INFO L495 AbstractCegarLoop]: Abstraction has 1376 states and 1904 transitions. [2022-11-03 02:55:43,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:43,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 1904 transitions. [2022-11-03 02:55:43,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 02:55:43,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:43,903 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:43,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (82)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:44,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:44,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:55:44,311 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:44,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:44,312 INFO L85 PathProgramCache]: Analyzing trace with hash 626692543, now seen corresponding path program 1 times [2022-11-03 02:55:44,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:44,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885434984] [2022-11-03 02:55:44,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:44,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:44,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:44,314 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:44,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-03 02:55:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:45,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:55:45,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:55:45,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:46,450 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:55:46,450 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:55:46,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885434984] [2022-11-03 02:55:46,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885434984] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:46,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [332858793] [2022-11-03 02:55:46,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:46,451 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:55:46,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:55:46,453 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:55:46,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (84)] Waiting until timeout for monitored process [2022-11-03 02:55:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:47,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:55:47,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-03 02:55:47,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:55:47,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [332858793] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:55:47,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:55:47,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 02:55:47,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541379993] [2022-11-03 02:55:47,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:55:47,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:55:47,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:47,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:55:47,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:55:47,840 INFO L87 Difference]: Start difference. First operand 1376 states and 1904 transitions. Second operand has 5 states, 5 states have (on average 59.6) internal successors, (298), 5 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:47,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:47,989 INFO L93 Difference]: Finished difference Result 5064 states and 7170 transitions. [2022-11-03 02:55:47,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:55:47,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 59.6) internal successors, (298), 5 states have internal predecessors, (298), 0 states have call successors, (0), 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 359 [2022-11-03 02:55:47,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:47,995 INFO L225 Difference]: With dead ends: 5064 [2022-11-03 02:55:47,995 INFO L226 Difference]: Without dead ends: 3900 [2022-11-03 02:55:47,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1063 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:55:47,998 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 1414 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1414 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:47,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1414 Valid, 1362 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:55:48,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3900 states. [2022-11-03 02:55:48,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3900 to 1328. [2022-11-03 02:55:48,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 1.389600602863602) internal successors, (1844), 1327 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 1844 transitions. [2022-11-03 02:55:48,038 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 1844 transitions. Word has length 359 [2022-11-03 02:55:48,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:48,039 INFO L495 AbstractCegarLoop]: Abstraction has 1328 states and 1844 transitions. [2022-11-03 02:55:48,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.6) internal successors, (298), 5 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:48,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 1844 transitions. [2022-11-03 02:55:48,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 02:55:48,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:48,043 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:48,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:48,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (84)] Ended with exit code 0 [2022-11-03 02:55:48,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:55:48,457 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:48,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:48,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1520178881, now seen corresponding path program 1 times [2022-11-03 02:55:48,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:48,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286323936] [2022-11-03 02:55:48,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:48,460 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:48,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:48,462 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:48,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-03 02:55:49,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:49,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:55:49,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:55:50,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:55:50,540 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:55:50,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286323936] [2022-11-03 02:55:50,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286323936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:50,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [463979136] [2022-11-03 02:55:50,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:50,541 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:55:50,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:55:50,543 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:55:50,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (86)] Waiting until timeout for monitored process [2022-11-03 02:55:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:52,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:55:52,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 131 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:55:52,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:53,206 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 146 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:55:53,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [463979136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:53,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684772090] [2022-11-03 02:55:53,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:53,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:55:53,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:55:53,208 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:55:53,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-11-03 02:55:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:53,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:55:53,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:54,945 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 169 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:55:54,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 169 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:55:56,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684772090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:56,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:55:56,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 7, 7] total 30 [2022-11-03 02:55:56,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923691032] [2022-11-03 02:55:56,242 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:55:56,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 02:55:56,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:56,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 02:55:56,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:55:56,245 INFO L87 Difference]: Start difference. First operand 1328 states and 1844 transitions. Second operand has 30 states, 30 states have (on average 38.733333333333334) internal successors, (1162), 30 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:56:17,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:56:17,446 INFO L93 Difference]: Finished difference Result 16877 states and 23897 transitions. [2022-11-03 02:56:17,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-11-03 02:56:17,446 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 38.733333333333334) internal successors, (1162), 30 states have internal predecessors, (1162), 0 states have call successors, (0), 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 359 [2022-11-03 02:56:17,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:56:17,459 INFO L225 Difference]: With dead ends: 16877 [2022-11-03 02:56:17,459 INFO L226 Difference]: Without dead ends: 15753 [2022-11-03 02:56:17,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2279 GetRequests, 2121 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7988 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=3682, Invalid=21758, Unknown=0, NotChecked=0, Total=25440 [2022-11-03 02:56:17,463 INFO L413 NwaCegarLoop]: 2342 mSDtfsCounter, 8560 mSDsluCounter, 49855 mSDsCounter, 0 mSdLazyCounter, 7195 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8560 SdHoareTripleChecker+Valid, 52197 SdHoareTripleChecker+Invalid, 9982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 7195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2686 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:56:17,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8560 Valid, 52197 Invalid, 9982 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [101 Valid, 7195 Invalid, 0 Unknown, 2686 Unchecked, 8.9s Time] [2022-11-03 02:56:17,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15753 states. [2022-11-03 02:56:17,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15753 to 1856. [2022-11-03 02:56:17,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1855 states have (on average 1.3940700808625337) internal successors, (2586), 1855 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:56:17,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 2586 transitions. [2022-11-03 02:56:17,565 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 2586 transitions. Word has length 359 [2022-11-03 02:56:17,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:56:17,566 INFO L495 AbstractCegarLoop]: Abstraction has 1856 states and 2586 transitions. [2022-11-03 02:56:17,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 38.733333333333334) internal successors, (1162), 30 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:56:17,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 2586 transitions. [2022-11-03 02:56:17,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 02:56:17,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:56:17,570 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:56:17,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-11-03 02:56:17,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (86)] Ended with exit code 0 [2022-11-03 02:56:18,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-11-03 02:56:18,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:56:18,185 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:56:18,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:56:18,185 INFO L85 PathProgramCache]: Analyzing trace with hash 978335817, now seen corresponding path program 1 times [2022-11-03 02:56:18,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:56:18,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822838774] [2022-11-03 02:56:18,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:56:18,187 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:56:18,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:56:18,188 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:56:18,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-03 02:56:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:56:18,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:56:18,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:56:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:56:20,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:56:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:56:24,374 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:56:24,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822838774] [2022-11-03 02:56:24,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822838774] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:56:24,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1345701695] [2022-11-03 02:56:24,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:56:24,374 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:56:24,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:56:24,375 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:56:24,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2022-11-03 02:56:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:56:25,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:56:25,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:56:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:56:25,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:56:25,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1345701695] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:56:25,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:56:25,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 02:56:25,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836403707] [2022-11-03 02:56:25,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:56:25,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:56:25,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:56:25,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:56:25,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:56:25,699 INFO L87 Difference]: Start difference. First operand 1856 states and 2586 transitions. Second operand has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:56:25,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:56:25,850 INFO L93 Difference]: Finished difference Result 4526 states and 6383 transitions. [2022-11-03 02:56:25,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:56:25,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 359 [2022-11-03 02:56:25,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:56:25,853 INFO L225 Difference]: With dead ends: 4526 [2022-11-03 02:56:25,854 INFO L226 Difference]: Without dead ends: 3009 [2022-11-03 02:56:25,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:56:25,855 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 1310 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1310 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:56:25,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1310 Valid, 1046 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:56:25,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2022-11-03 02:56:25,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 1856. [2022-11-03 02:56:25,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1855 states have (on average 1.3897574123989218) internal successors, (2578), 1855 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:56:25,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 2578 transitions. [2022-11-03 02:56:25,903 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 2578 transitions. Word has length 359 [2022-11-03 02:56:25,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:56:25,904 INFO L495 AbstractCegarLoop]: Abstraction has 1856 states and 2578 transitions. [2022-11-03 02:56:25,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:56:25,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 2578 transitions. [2022-11-03 02:56:25,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 02:56:25,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:56:25,907 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:56:25,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Forceful destruction successful, exit code 0 [2022-11-03 02:56:26,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (89)] Ended with exit code 0 [2022-11-03 02:56:26,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:56:26,330 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:56:26,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:56:26,331 INFO L85 PathProgramCache]: Analyzing trace with hash -809534005, now seen corresponding path program 1 times [2022-11-03 02:56:26,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:56:26,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413416957] [2022-11-03 02:56:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:56:26,333 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:56:26,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:56:26,334 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:56:26,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-03 02:56:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:56:27,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:56:27,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:56:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:56:28,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:56:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:56:32,369 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:56:32,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413416957] [2022-11-03 02:56:32,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413416957] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:56:32,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [612499414] [2022-11-03 02:56:32,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:56:32,369 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:56:32,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:56:32,370 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:56:32,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (91)] Waiting until timeout for monitored process [2022-11-03 02:56:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:56:33,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:56:33,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:56:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:56:33,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:56:33,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [612499414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:56:33,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:56:33,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 02:56:33,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235784556] [2022-11-03 02:56:33,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:56:33,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:56:33,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:56:33,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:56:33,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:56:33,740 INFO L87 Difference]: Start difference. First operand 1856 states and 2578 transitions. Second operand has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:56:33,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:56:33,890 INFO L93 Difference]: Finished difference Result 4644 states and 6539 transitions. [2022-11-03 02:56:33,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:56:33,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 359 [2022-11-03 02:56:33,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:56:33,894 INFO L225 Difference]: With dead ends: 4644 [2022-11-03 02:56:33,894 INFO L226 Difference]: Without dead ends: 3135 [2022-11-03 02:56:33,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:56:33,896 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 1340 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:56:33,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1340 Valid, 1032 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:56:33,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2022-11-03 02:56:33,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 1856. [2022-11-03 02:56:33,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1855 states have (on average 1.3881401617250675) internal successors, (2575), 1855 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:56:33,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 2575 transitions. [2022-11-03 02:56:33,938 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 2575 transitions. Word has length 359 [2022-11-03 02:56:33,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:56:33,938 INFO L495 AbstractCegarLoop]: Abstraction has 1856 states and 2575 transitions. [2022-11-03 02:56:33,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:56:33,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 2575 transitions. [2022-11-03 02:56:33,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 02:56:33,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:56:33,940 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:56:33,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (90)] Ended with exit code 0 [2022-11-03 02:56:34,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (91)] Forceful destruction successful, exit code 0 [2022-11-03 02:56:34,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:56:34,341 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:56:34,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:56:34,342 INFO L85 PathProgramCache]: Analyzing trace with hash 221506893, now seen corresponding path program 1 times [2022-11-03 02:56:34,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:56:34,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099623349] [2022-11-03 02:56:34,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:56:34,343 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:56:34,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:56:34,344 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:56:34,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-03 02:56:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:56:35,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:56:35,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:56:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:56:36,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:56:40,407 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:56:40,407 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:56:40,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099623349] [2022-11-03 02:56:40,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099623349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:56:40,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1246827714] [2022-11-03 02:56:40,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:56:40,407 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:56:40,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:56:40,408 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:56:40,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2022-11-03 02:56:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:56:41,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:56:41,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:56:41,767 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:56:41,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:56:41,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1246827714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:56:41,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:56:41,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 02:56:41,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142623772] [2022-11-03 02:56:41,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:56:41,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:56:41,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:56:41,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:56:41,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:56:41,769 INFO L87 Difference]: Start difference. First operand 1856 states and 2575 transitions. Second operand has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:56:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:56:41,911 INFO L93 Difference]: Finished difference Result 4693 states and 6601 transitions. [2022-11-03 02:56:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:56:41,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 359 [2022-11-03 02:56:41,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:56:41,915 INFO L225 Difference]: With dead ends: 4693 [2022-11-03 02:56:41,915 INFO L226 Difference]: Without dead ends: 3184 [2022-11-03 02:56:41,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:56:41,918 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 1344 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1344 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:56:41,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1344 Valid, 1029 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:56:41,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2022-11-03 02:56:41,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 1856. [2022-11-03 02:56:41,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1855 states have (on average 1.3849056603773584) internal successors, (2569), 1855 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:56:41,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 2569 transitions. [2022-11-03 02:56:41,969 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 2569 transitions. Word has length 359 [2022-11-03 02:56:41,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:56:41,970 INFO L495 AbstractCegarLoop]: Abstraction has 1856 states and 2569 transitions. [2022-11-03 02:56:41,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:56:41,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 2569 transitions. [2022-11-03 02:56:41,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 02:56:41,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:56:41,974 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:56:41,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (93)] Forceful destruction successful, exit code 0 [2022-11-03 02:56:42,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Forceful destruction successful, exit code 0 [2022-11-03 02:56:42,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:56:42,382 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:56:42,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:56:42,383 INFO L85 PathProgramCache]: Analyzing trace with hash -549226673, now seen corresponding path program 1 times [2022-11-03 02:56:42,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:56:42,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981860440] [2022-11-03 02:56:42,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:56:42,384 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:56:42,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:56:42,385 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:56:42,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-03 02:56:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:56:43,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:56:43,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:56:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:56:44,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:56:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:56:48,482 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:56:48,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981860440] [2022-11-03 02:56:48,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [981860440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:56:48,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1887135116] [2022-11-03 02:56:48,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:56:48,483 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:56:48,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:56:48,486 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:56:48,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (95)] Waiting until timeout for monitored process [2022-11-03 02:56:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:56:49,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:56:49,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:56:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:56:49,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:56:49,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1887135116] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:56:49,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:56:49,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 02:56:49,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315974431] [2022-11-03 02:56:49,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:56:49,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:56:49,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:56:49,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:56:49,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:56:49,877 INFO L87 Difference]: Start difference. First operand 1856 states and 2569 transitions. Second operand has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:56:50,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:56:50,030 INFO L93 Difference]: Finished difference Result 4729 states and 6637 transitions. [2022-11-03 02:56:50,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:56:50,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 359 [2022-11-03 02:56:50,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:56:50,034 INFO L225 Difference]: With dead ends: 4729 [2022-11-03 02:56:50,035 INFO L226 Difference]: Without dead ends: 3220 [2022-11-03 02:56:50,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:56:50,037 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 1346 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1346 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:56:50,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1346 Valid, 1026 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:56:50,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2022-11-03 02:56:50,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 1856. [2022-11-03 02:56:50,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1855 states have (on average 1.3816711590296495) internal successors, (2563), 1855 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:56:50,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 2563 transitions. [2022-11-03 02:56:50,091 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 2563 transitions. Word has length 359 [2022-11-03 02:56:50,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:56:50,092 INFO L495 AbstractCegarLoop]: Abstraction has 1856 states and 2563 transitions. [2022-11-03 02:56:50,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:56:50,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 2563 transitions. [2022-11-03 02:56:50,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 02:56:50,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:56:50,096 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:56:50,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Forceful destruction successful, exit code 0 [2022-11-03 02:56:50,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (95)] Forceful destruction successful, exit code 0 [2022-11-03 02:56:50,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:56:50,522 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:56:50,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:56:50,522 INFO L85 PathProgramCache]: Analyzing trace with hash 775629521, now seen corresponding path program 1 times [2022-11-03 02:56:50,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:56:50,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210602751] [2022-11-03 02:56:50,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:56:50,524 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:56:50,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:56:50,525 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:56:50,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-11-03 02:56:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:56:51,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:56:51,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:56:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:56:53,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:56:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:56:57,020 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:56:57,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [210602751] [2022-11-03 02:56:57,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [210602751] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:56:57,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1981701149] [2022-11-03 02:56:57,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:56:57,020 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:56:57,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:56:57,022 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:56:57,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (97)] Waiting until timeout for monitored process [2022-11-03 02:56:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:56:58,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:56:58,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:56:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:56:58,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:56:58,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1981701149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:56:58,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:56:58,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 02:56:58,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979022197] [2022-11-03 02:56:58,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:56:58,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:56:58,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:56:58,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:56:58,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:56:58,495 INFO L87 Difference]: Start difference. First operand 1856 states and 2563 transitions. Second operand has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:56:58,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:56:58,647 INFO L93 Difference]: Finished difference Result 4777 states and 6691 transitions. [2022-11-03 02:56:58,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:56:58,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 359 [2022-11-03 02:56:58,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:56:58,651 INFO L225 Difference]: With dead ends: 4777 [2022-11-03 02:56:58,651 INFO L226 Difference]: Without dead ends: 3268 [2022-11-03 02:56:58,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:56:58,652 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 1349 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1349 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:56:58,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1349 Valid, 1023 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:56:58,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3268 states. [2022-11-03 02:56:58,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3268 to 1856. [2022-11-03 02:56:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1855 states have (on average 1.3784366576819407) internal successors, (2557), 1855 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:56:58,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 2557 transitions. [2022-11-03 02:56:58,686 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 2557 transitions. Word has length 359 [2022-11-03 02:56:58,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:56:58,686 INFO L495 AbstractCegarLoop]: Abstraction has 1856 states and 2557 transitions. [2022-11-03 02:56:58,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:56:58,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 2557 transitions. [2022-11-03 02:56:58,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 02:56:58,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:56:58,688 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:56:58,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Ended with exit code 0 [2022-11-03 02:56:58,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (97)] Forceful destruction successful, exit code 0 [2022-11-03 02:56:59,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:56:59,089 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:56:59,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:56:59,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1785233325, now seen corresponding path program 1 times [2022-11-03 02:56:59,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:56:59,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471184557] [2022-11-03 02:56:59,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:56:59,092 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:56:59,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:56:59,093 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:56:59,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-03 02:56:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:56:59,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:56:59,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:57:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:57:01,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:57:05,561 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:57:05,561 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:57:05,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471184557] [2022-11-03 02:57:05,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471184557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:57:05,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [502649373] [2022-11-03 02:57:05,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:57:05,562 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:57:05,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:57:05,563 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:57:05,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (99)] Waiting until timeout for monitored process [2022-11-03 02:57:06,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:57:06,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:57:06,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:57:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:57:06,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:57:06,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [502649373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:57:07,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:57:07,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 02:57:07,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743865581] [2022-11-03 02:57:07,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:57:07,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:57:07,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:57:07,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:57:07,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:57:07,003 INFO L87 Difference]: Start difference. First operand 1856 states and 2557 transitions. Second operand has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:57:07,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:57:07,150 INFO L93 Difference]: Finished difference Result 4995 states and 6989 transitions. [2022-11-03 02:57:07,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:57:07,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 359 [2022-11-03 02:57:07,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:57:07,154 INFO L225 Difference]: With dead ends: 4995 [2022-11-03 02:57:07,154 INFO L226 Difference]: Without dead ends: 3486 [2022-11-03 02:57:07,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:57:07,156 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 1361 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:57:07,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1361 Valid, 1018 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:57:07,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2022-11-03 02:57:07,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 1936. [2022-11-03 02:57:07,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1936 states, 1935 states have (on average 1.3772609819121446) internal successors, (2665), 1935 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:57:07,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 2665 transitions. [2022-11-03 02:57:07,208 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 2665 transitions. Word has length 359 [2022-11-03 02:57:07,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:57:07,208 INFO L495 AbstractCegarLoop]: Abstraction has 1936 states and 2665 transitions. [2022-11-03 02:57:07,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:57:07,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 2665 transitions. [2022-11-03 02:57:07,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 02:57:07,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:57:07,213 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:57:07,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Forceful destruction successful, exit code 0 [2022-11-03 02:57:07,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (99)] Forceful destruction successful, exit code 0 [2022-11-03 02:57:07,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:57:07,629 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:57:07,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:57:07,629 INFO L85 PathProgramCache]: Analyzing trace with hash -398447915, now seen corresponding path program 1 times [2022-11-03 02:57:07,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:57:07,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1731896830] [2022-11-03 02:57:07,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:57:07,631 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:57:07,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:57:07,632 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:57:07,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-03 02:57:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:57:08,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:57:08,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:57:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:57:10,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:57:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:57:14,040 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:57:14,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1731896830] [2022-11-03 02:57:14,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1731896830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:57:14,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [205741439] [2022-11-03 02:57:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:57:14,041 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:57:14,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:57:14,044 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:57:14,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (101)] Waiting until timeout for monitored process [2022-11-03 02:57:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:57:15,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:57:15,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:57:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:57:15,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:57:15,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [205741439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:57:15,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:57:15,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 02:57:15,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422641868] [2022-11-03 02:57:15,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:57:15,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:57:15,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:57:15,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:57:15,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:57:15,552 INFO L87 Difference]: Start difference. First operand 1936 states and 2665 transitions. Second operand has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:57:15,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:57:15,708 INFO L93 Difference]: Finished difference Result 5147 states and 7181 transitions. [2022-11-03 02:57:15,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:57:15,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 359 [2022-11-03 02:57:15,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:57:15,712 INFO L225 Difference]: With dead ends: 5147 [2022-11-03 02:57:15,712 INFO L226 Difference]: Without dead ends: 3558 [2022-11-03 02:57:15,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:57:15,714 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 1363 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1363 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:57:15,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1363 Valid, 1015 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:57:15,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3558 states. [2022-11-03 02:57:15,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3558 to 1984. [2022-11-03 02:57:15,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1983 states have (on average 1.3741805345436209) internal successors, (2725), 1983 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:57:15,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 2725 transitions. [2022-11-03 02:57:15,749 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 2725 transitions. Word has length 359 [2022-11-03 02:57:15,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:57:15,750 INFO L495 AbstractCegarLoop]: Abstraction has 1984 states and 2725 transitions. [2022-11-03 02:57:15,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:57:15,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 2725 transitions. [2022-11-03 02:57:15,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 02:57:15,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:57:15,752 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:57:15,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (101)] Ended with exit code 0 [2022-11-03 02:57:15,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Ended with exit code 0 [2022-11-03 02:57:16,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:57:16,153 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:57:16,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:57:16,154 INFO L85 PathProgramCache]: Analyzing trace with hash -413966633, now seen corresponding path program 1 times [2022-11-03 02:57:16,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:57:16,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [968475429] [2022-11-03 02:57:16,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:57:16,156 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:57:16,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:57:16,157 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:57:16,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2022-11-03 02:57:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:57:16,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:57:16,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:57:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:57:18,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:57:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:57:22,381 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:57:22,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [968475429] [2022-11-03 02:57:22,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [968475429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:57:22,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [930051863] [2022-11-03 02:57:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:57:22,381 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:57:22,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:57:22,383 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:57:22,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (103)] Waiting until timeout for monitored process [2022-11-03 02:57:23,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:57:24,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:57:24,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:57:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 43 proven. 33 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 02:57:25,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:57:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 43 proven. 33 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 02:57:26,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [930051863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:57:26,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013686498] [2022-11-03 02:57:26,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:57:26,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:57:26,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:57:26,599 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:57:26,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-11-03 02:57:27,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:57:27,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:57:27,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:57:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 159 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:57:28,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:57:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 159 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:57:29,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013686498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:57:29,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:57:29,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 11, 11, 6, 6] total 32 [2022-11-03 02:57:29,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202821652] [2022-11-03 02:57:29,181 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:57:29,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-03 02:57:29,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:57:29,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-03 02:57:29,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:57:29,184 INFO L87 Difference]: Start difference. First operand 1984 states and 2725 transitions. Second operand has 32 states, 32 states have (on average 43.125) internal successors, (1380), 32 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:58:13,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:58:13,681 INFO L93 Difference]: Finished difference Result 57411 states and 81490 transitions. [2022-11-03 02:58:13,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 280 states. [2022-11-03 02:58:13,682 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 43.125) internal successors, (1380), 32 states have internal predecessors, (1380), 0 states have call successors, (0), 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 359 [2022-11-03 02:58:13,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:58:13,724 INFO L225 Difference]: With dead ends: 57411 [2022-11-03 02:58:13,724 INFO L226 Difference]: Without dead ends: 55746 [2022-11-03 02:58:13,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2426 GetRequests, 2118 SyntacticMatches, 0 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36859 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=14533, Invalid=81257, Unknown=0, NotChecked=0, Total=95790 [2022-11-03 02:58:13,739 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 25334 mSDsluCounter, 9194 mSDsCounter, 0 mSdLazyCounter, 2246 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25334 SdHoareTripleChecker+Valid, 9728 SdHoareTripleChecker+Invalid, 7570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 2246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4869 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:58:13,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25334 Valid, 9728 Invalid, 7570 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [455 Valid, 2246 Invalid, 0 Unknown, 4869 Unchecked, 3.8s Time] [2022-11-03 02:58:13,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55746 states. [2022-11-03 02:58:13,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55746 to 2228. [2022-11-03 02:58:13,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2227 states have (on average 1.3740458015267176) internal successors, (3060), 2227 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:58:13,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 3060 transitions. [2022-11-03 02:58:13,951 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 3060 transitions. Word has length 359 [2022-11-03 02:58:13,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:58:13,951 INFO L495 AbstractCegarLoop]: Abstraction has 2228 states and 3060 transitions. [2022-11-03 02:58:13,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 43.125) internal successors, (1380), 32 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:58:13,951 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 3060 transitions. [2022-11-03 02:58:13,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 02:58:13,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:58:13,955 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:58:13,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (103)] Forceful destruction successful, exit code 0 [2022-11-03 02:58:14,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (102)] Forceful destruction successful, exit code 0 [2022-11-03 02:58:14,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-11-03 02:58:14,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:58:14,556 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:58:14,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:58:14,557 INFO L85 PathProgramCache]: Analyzing trace with hash 4614749, now seen corresponding path program 1 times [2022-11-03 02:58:14,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:58:14,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784031783] [2022-11-03 02:58:14,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:58:14,559 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:58:14,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:58:14,560 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:58:14,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2022-11-03 02:58:15,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:58:15,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:58:15,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:58:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 167 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:58:17,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:58:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 167 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:58:20,978 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:58:20,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784031783] [2022-11-03 02:58:20,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784031783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:58:20,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1284000752] [2022-11-03 02:58:20,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:58:20,979 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:58:20,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:58:20,980 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:58:20,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (106)] Waiting until timeout for monitored process [2022-11-03 02:58:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:58:22,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:58:22,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:58:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:58:22,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:58:22,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1284000752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:58:22,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:58:22,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 02:58:22,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586930056] [2022-11-03 02:58:22,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:58:22,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:58:22,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:58:22,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:58:22,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:58:22,278 INFO L87 Difference]: Start difference. First operand 2228 states and 3060 transitions. Second operand has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:58:22,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:58:22,446 INFO L93 Difference]: Finished difference Result 7981 states and 11155 transitions. [2022-11-03 02:58:22,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:58:22,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 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 359 [2022-11-03 02:58:22,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:58:22,453 INFO L225 Difference]: With dead ends: 7981 [2022-11-03 02:58:22,453 INFO L226 Difference]: Without dead ends: 6094 [2022-11-03 02:58:22,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:58:22,457 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 1309 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1309 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:58:22,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1309 Valid, 1071 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:58:22,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6094 states. [2022-11-03 02:58:22,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6094 to 2516. [2022-11-03 02:58:22,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2516 states, 2515 states have (on average 1.3801192842942347) internal successors, (3471), 2515 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:58:22,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2516 states to 2516 states and 3471 transitions. [2022-11-03 02:58:22,520 INFO L78 Accepts]: Start accepts. Automaton has 2516 states and 3471 transitions. Word has length 359 [2022-11-03 02:58:22,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:58:22,520 INFO L495 AbstractCegarLoop]: Abstraction has 2516 states and 3471 transitions. [2022-11-03 02:58:22,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:58:22,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2516 states and 3471 transitions. [2022-11-03 02:58:22,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 02:58:22,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:58:22,524 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:58:22,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (105)] Ended with exit code 0 [2022-11-03 02:58:22,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (106)] Forceful destruction successful, exit code 0 [2022-11-03 02:58:22,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:58:22,925 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:58:22,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:58:22,925 INFO L85 PathProgramCache]: Analyzing trace with hash -151365793, now seen corresponding path program 1 times [2022-11-03 02:58:22,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:58:22,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099363047] [2022-11-03 02:58:22,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:58:22,927 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:58:22,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:58:22,928 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:58:22,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-03 02:58:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:58:23,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:58:23,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:58:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 167 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:58:25,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:58:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 167 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:58:29,584 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:58:29,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099363047] [2022-11-03 02:58:29,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099363047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:58:29,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [659610080] [2022-11-03 02:58:29,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:58:29,585 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:58:29,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:58:29,586 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:58:29,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (108)] Waiting until timeout for monitored process [2022-11-03 02:58:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:58:30,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:58:30,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:58:30,952 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:58:30,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:58:30,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [659610080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:58:30,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:58:30,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 02:58:30,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844259100] [2022-11-03 02:58:30,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:58:30,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:58:30,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:58:30,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:58:30,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:58:30,955 INFO L87 Difference]: Start difference. First operand 2516 states and 3471 transitions. Second operand has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:58:31,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:58:31,128 INFO L93 Difference]: Finished difference Result 8488 states and 11865 transitions. [2022-11-03 02:58:31,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:58:31,129 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 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 359 [2022-11-03 02:58:31,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:58:31,135 INFO L225 Difference]: With dead ends: 8488 [2022-11-03 02:58:31,135 INFO L226 Difference]: Without dead ends: 6357 [2022-11-03 02:58:31,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:58:31,139 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 1339 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1339 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:58:31,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1339 Valid, 1057 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:58:31,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6357 states. [2022-11-03 02:58:31,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6357 to 2756. [2022-11-03 02:58:31,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2756 states, 2755 states have (on average 1.385480943738657) internal successors, (3817), 2755 states have internal predecessors, (3817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:58:31,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 3817 transitions. [2022-11-03 02:58:31,191 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 3817 transitions. Word has length 359 [2022-11-03 02:58:31,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:58:31,191 INFO L495 AbstractCegarLoop]: Abstraction has 2756 states and 3817 transitions. [2022-11-03 02:58:31,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:58:31,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 3817 transitions. [2022-11-03 02:58:31,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 02:58:31,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:58:31,195 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:58:31,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Ended with exit code 0 [2022-11-03 02:58:31,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (108)] Ended with exit code 0 [2022-11-03 02:58:31,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:58:31,595 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:58:31,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:58:31,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1458508191, now seen corresponding path program 1 times [2022-11-03 02:58:31,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:58:31,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424545654] [2022-11-03 02:58:31,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:58:31,598 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:58:31,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:58:31,598 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:58:31,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-11-03 02:58:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:58:32,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:58:32,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:58:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 167 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:58:34,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:58:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 167 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:58:38,221 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:58:38,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424545654] [2022-11-03 02:58:38,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424545654] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:58:38,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1094392360] [2022-11-03 02:58:38,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:58:38,222 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:58:38,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:58:38,223 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:58:38,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (110)] Waiting until timeout for monitored process [2022-11-03 02:58:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:58:39,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:58:39,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:58:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:58:39,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:58:39,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1094392360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:58:39,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:58:39,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 02:58:39,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468813718] [2022-11-03 02:58:39,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:58:39,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:58:39,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:58:39,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:58:39,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:58:39,617 INFO L87 Difference]: Start difference. First operand 2756 states and 3817 transitions. Second operand has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:58:39,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:58:39,803 INFO L93 Difference]: Finished difference Result 8788 states and 12284 transitions. [2022-11-03 02:58:39,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:58:39,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 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 359 [2022-11-03 02:58:39,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:58:39,808 INFO L225 Difference]: With dead ends: 8788 [2022-11-03 02:58:39,808 INFO L226 Difference]: Without dead ends: 6427 [2022-11-03 02:58:39,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:58:39,811 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 1343 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1343 SdHoareTripleChecker+Valid, 1054 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:58:39,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1343 Valid, 1054 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:58:39,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6427 states. [2022-11-03 02:58:39,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6427 to 2836. [2022-11-03 02:58:39,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2836 states, 2835 states have (on average 1.384126984126984) internal successors, (3924), 2835 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:58:39,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2836 states to 2836 states and 3924 transitions. [2022-11-03 02:58:39,862 INFO L78 Accepts]: Start accepts. Automaton has 2836 states and 3924 transitions. Word has length 359 [2022-11-03 02:58:39,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:58:39,863 INFO L495 AbstractCegarLoop]: Abstraction has 2836 states and 3924 transitions. [2022-11-03 02:58:39,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:58:39,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2836 states and 3924 transitions. [2022-11-03 02:58:39,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 02:58:39,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:58:39,866 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:58:39,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (110)] Forceful destruction successful, exit code 0 [2022-11-03 02:58:40,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (109)] Forceful destruction successful, exit code 0 [2022-11-03 02:58:40,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:58:40,266 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:58:40,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:58:40,267 INFO L85 PathProgramCache]: Analyzing trace with hash 895877091, now seen corresponding path program 1 times [2022-11-03 02:58:40,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:58:40,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363386327] [2022-11-03 02:58:40,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:58:40,269 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:58:40,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:58:40,270 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:58:40,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2022-11-03 02:58:41,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:58:41,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:58:41,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:58:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 167 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:58:43,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:58:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 167 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:58:47,154 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:58:47,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363386327] [2022-11-03 02:58:47,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363386327] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:58:47,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [7129066] [2022-11-03 02:58:47,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:58:47,154 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:58:47,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:58:47,155 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:58:47,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (112)] Waiting until timeout for monitored process [2022-11-03 02:58:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:58:48,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:58:48,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:58:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:58:48,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:58:48,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [7129066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:58:48,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:58:48,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 02:58:48,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830150456] [2022-11-03 02:58:48,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:58:48,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:58:48,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:58:48,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:58:48,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:58:48,659 INFO L87 Difference]: Start difference. First operand 2836 states and 3924 transitions. Second operand has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:58:48,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:58:48,858 INFO L93 Difference]: Finished difference Result 9178 states and 12789 transitions. [2022-11-03 02:58:48,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:58:48,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 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 359 [2022-11-03 02:58:48,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:58:48,865 INFO L225 Difference]: With dead ends: 9178 [2022-11-03 02:58:48,866 INFO L226 Difference]: Without dead ends: 6737 [2022-11-03 02:58:48,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:58:48,870 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 1361 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:58:48,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1361 Valid, 1044 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:58:48,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6737 states. [2022-11-03 02:58:48,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6737 to 3180. [2022-11-03 02:58:48,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3180 states, 3179 states have (on average 1.3787354513998114) internal successors, (4383), 3179 states have internal predecessors, (4383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:58:48,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3180 states to 3180 states and 4383 transitions. [2022-11-03 02:58:48,931 INFO L78 Accepts]: Start accepts. Automaton has 3180 states and 4383 transitions. Word has length 359 [2022-11-03 02:58:48,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:58:48,931 INFO L495 AbstractCegarLoop]: Abstraction has 3180 states and 4383 transitions. [2022-11-03 02:58:48,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:58:48,932 INFO L276 IsEmpty]: Start isEmpty. Operand 3180 states and 4383 transitions. [2022-11-03 02:58:48,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 02:58:48,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:58:48,935 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:58:48,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (112)] Forceful destruction successful, exit code 0 [2022-11-03 02:58:49,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (111)] Ended with exit code 0 [2022-11-03 02:58:49,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:58:49,335 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:58:49,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:58:49,336 INFO L85 PathProgramCache]: Analyzing trace with hash -320276635, now seen corresponding path program 1 times [2022-11-03 02:58:49,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:58:49,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751750895] [2022-11-03 02:58:49,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:58:49,338 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:58:49,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:58:49,339 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:58:49,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2022-11-03 02:58:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:58:50,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:58:50,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:58:52,074 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 167 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:58:52,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:58:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 167 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:58:56,236 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:58:56,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751750895] [2022-11-03 02:58:56,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751750895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:58:56,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [593457963] [2022-11-03 02:58:56,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:58:56,237 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:58:56,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:58:56,238 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:58:56,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (114)] Waiting until timeout for monitored process [2022-11-03 02:58:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:58:57,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:58:57,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:58:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:58:57,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:58:57,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [593457963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:58:57,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:58:57,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 02:58:57,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689439345] [2022-11-03 02:58:57,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:58:57,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:58:57,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:58:57,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:58:57,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:58:57,725 INFO L87 Difference]: Start difference. First operand 3180 states and 4383 transitions. Second operand has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:58:57,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:58:57,895 INFO L93 Difference]: Finished difference Result 9792 states and 13587 transitions. [2022-11-03 02:58:57,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:58:57,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 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 359 [2022-11-03 02:58:57,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:58:57,901 INFO L225 Difference]: With dead ends: 9792 [2022-11-03 02:58:57,901 INFO L226 Difference]: Without dead ends: 7007 [2022-11-03 02:58:57,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:58:57,904 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 1365 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1365 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:58:57,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1365 Valid, 1041 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:58:57,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7007 states. [2022-11-03 02:58:57,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7007 to 3450. [2022-11-03 02:58:57,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3450 states, 3449 states have (on average 1.3769208466222094) internal successors, (4749), 3449 states have internal predecessors, (4749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:58:57,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3450 states to 3450 states and 4749 transitions. [2022-11-03 02:58:57,967 INFO L78 Accepts]: Start accepts. Automaton has 3450 states and 4749 transitions. Word has length 359 [2022-11-03 02:58:57,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:58:57,968 INFO L495 AbstractCegarLoop]: Abstraction has 3450 states and 4749 transitions. [2022-11-03 02:58:57,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:58:57,968 INFO L276 IsEmpty]: Start isEmpty. Operand 3450 states and 4749 transitions. [2022-11-03 02:58:57,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 02:58:57,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:58:57,971 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:58:57,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (113)] Ended with exit code 0 [2022-11-03 02:58:58,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (114)] Ended with exit code 0 [2022-11-03 02:58:58,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:58:58,372 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:58:58,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:58:58,373 INFO L85 PathProgramCache]: Analyzing trace with hash 940640615, now seen corresponding path program 1 times [2022-11-03 02:58:58,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:58:58,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071343186] [2022-11-03 02:58:58,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:58:58,374 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:58:58,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:58:58,375 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:58:58,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2022-11-03 02:58:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:58:59,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:58:59,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:59:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 167 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:59:01,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:59:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 167 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:59:05,285 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:59:05,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071343186] [2022-11-03 02:59:05,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071343186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:59:05,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2120343815] [2022-11-03 02:59:05,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:59:05,286 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:59:05,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:59:05,287 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:59:05,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (116)] Waiting until timeout for monitored process [2022-11-03 02:59:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:59:06,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:59:06,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:59:08,312 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 41 proven. 35 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 02:59:08,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:59:09,843 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 41 proven. 35 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 02:59:09,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2120343815] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:59:09,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163485410] [2022-11-03 02:59:09,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:59:09,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:59:09,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:59:09,848 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:59:09,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-11-03 02:59:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:59:10,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:59:10,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:59:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 157 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:59:11,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:59:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 157 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:59:12,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163485410] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:59:12,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:59:12,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 11, 11, 6, 6] total 33 [2022-11-03 02:59:12,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767185276] [2022-11-03 02:59:12,556 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:59:12,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-03 02:59:12,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:59:12,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-03 02:59:12,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 02:59:12,558 INFO L87 Difference]: Start difference. First operand 3450 states and 4749 transitions. Second operand has 33 states, 33 states have (on average 42.42424242424242) internal successors, (1400), 33 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:59:57,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:59:57,656 INFO L93 Difference]: Finished difference Result 69062 states and 96074 transitions. [2022-11-03 02:59:57,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2022-11-03 02:59:57,657 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 42.42424242424242) internal successors, (1400), 33 states have internal predecessors, (1400), 0 states have call successors, (0), 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 359 [2022-11-03 02:59:57,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:59:57,694 INFO L225 Difference]: With dead ends: 69062 [2022-11-03 02:59:57,695 INFO L226 Difference]: Without dead ends: 65955 [2022-11-03 02:59:57,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2411 GetRequests, 2126 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29580 ImplicationChecksByTransitivity, 38.1s TimeCoverageRelationStatistics Valid=12639, Invalid=69443, Unknown=0, NotChecked=0, Total=82082 [2022-11-03 02:59:57,704 INFO L413 NwaCegarLoop]: 1110 mSDtfsCounter, 20228 mSDsluCounter, 14758 mSDsCounter, 0 mSdLazyCounter, 2703 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20228 SdHoareTripleChecker+Valid, 15868 SdHoareTripleChecker+Invalid, 9302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 2703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6327 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:59:57,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20228 Valid, 15868 Invalid, 9302 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [272 Valid, 2703 Invalid, 0 Unknown, 6327 Unchecked, 4.8s Time] [2022-11-03 02:59:57,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65955 states. [2022-11-03 02:59:57,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65955 to 3498. [2022-11-03 02:59:57,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3498 states, 3497 states have (on average 1.3711752931083787) internal successors, (4795), 3497 states have internal predecessors, (4795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:59:57,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3498 states to 3498 states and 4795 transitions. [2022-11-03 02:59:57,932 INFO L78 Accepts]: Start accepts. Automaton has 3498 states and 4795 transitions. Word has length 359 [2022-11-03 02:59:57,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:59:57,932 INFO L495 AbstractCegarLoop]: Abstraction has 3498 states and 4795 transitions. [2022-11-03 02:59:57,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 42.42424242424242) internal successors, (1400), 33 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:59:57,932 INFO L276 IsEmpty]: Start isEmpty. Operand 3498 states and 4795 transitions. [2022-11-03 02:59:57,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 02:59:57,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:59:57,936 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:59:57,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (116)] Forceful destruction successful, exit code 0 [2022-11-03 02:59:58,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (115)] Ended with exit code 0 [2022-11-03 02:59:58,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-11-03 02:59:58,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:59:58,537 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:59:58,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:59:58,537 INFO L85 PathProgramCache]: Analyzing trace with hash 301389549, now seen corresponding path program 1 times [2022-11-03 02:59:58,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:59:58,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394701965] [2022-11-03 02:59:58,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:59:58,539 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:59:58,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:59:58,540 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:59:58,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2022-11-03 02:59:59,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:59:59,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:59:59,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:00:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 165 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:00:00,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:00:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 165 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:00:00,735 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:00:00,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394701965] [2022-11-03 03:00:00,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394701965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:00:00,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1573106161] [2022-11-03 03:00:00,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:00:00,736 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:00:00,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:00:00,737 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:00:00,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (119)] Waiting until timeout for monitored process [2022-11-03 03:00:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:00:02,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:00:02,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:00:02,196 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:00:02,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:00:02,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1573106161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:00:02,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:00:02,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 17 [2022-11-03 03:00:02,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872719284] [2022-11-03 03:00:02,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:00:02,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:00:02,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:00:02,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:00:02,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:00:02,198 INFO L87 Difference]: Start difference. First operand 3498 states and 4795 transitions. Second operand has 5 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:00:02,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:00:02,400 INFO L93 Difference]: Finished difference Result 14267 states and 19588 transitions. [2022-11-03 03:00:02,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:00:02,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 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 359 [2022-11-03 03:00:02,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:00:02,408 INFO L225 Difference]: With dead ends: 14267 [2022-11-03 03:00:02,408 INFO L226 Difference]: Without dead ends: 10815 [2022-11-03 03:00:02,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1062 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:00:02,412 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 842 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:00:02,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 1575 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:00:02,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10815 states. [2022-11-03 03:00:02,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10815 to 4168. [2022-11-03 03:00:02,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4168 states, 4167 states have (on average 1.3707703383729302) internal successors, (5712), 4167 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:00:02,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5712 transitions. [2022-11-03 03:00:02,490 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5712 transitions. Word has length 359 [2022-11-03 03:00:02,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:00:02,490 INFO L495 AbstractCegarLoop]: Abstraction has 4168 states and 5712 transitions. [2022-11-03 03:00:02,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:00:02,490 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5712 transitions. [2022-11-03 03:00:02,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:00:02,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:00:02,493 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:00:02,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (119)] Ended with exit code 0 [2022-11-03 03:00:02,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (118)] Forceful destruction successful, exit code 0 [2022-11-03 03:00:02,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:00:02,894 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:00:02,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:00:02,895 INFO L85 PathProgramCache]: Analyzing trace with hash 371037423, now seen corresponding path program 1 times [2022-11-03 03:00:02,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:00:02,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216183300] [2022-11-03 03:00:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:00:02,897 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:00:02,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:00:02,898 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:00:02,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2022-11-03 03:00:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:00:03,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:00:03,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:00:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 165 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:00:04,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:00:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 165 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:00:05,089 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:00:05,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216183300] [2022-11-03 03:00:05,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1216183300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:00:05,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1743715285] [2022-11-03 03:00:05,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:00:05,090 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:00:05,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:00:05,091 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:00:05,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (121)] Waiting until timeout for monitored process [2022-11-03 03:00:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:00:06,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:00:06,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:00:06,572 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:00:06,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:00:06,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1743715285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:00:06,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:00:06,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 17 [2022-11-03 03:00:06,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795241249] [2022-11-03 03:00:06,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:00:06,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:00:06,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:00:06,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:00:06,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:00:06,573 INFO L87 Difference]: Start difference. First operand 4168 states and 5712 transitions. Second operand has 5 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:00:06,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:00:06,793 INFO L93 Difference]: Finished difference Result 15236 states and 20940 transitions. [2022-11-03 03:00:06,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:00:06,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 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 359 [2022-11-03 03:00:06,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:00:06,803 INFO L225 Difference]: With dead ends: 15236 [2022-11-03 03:00:06,804 INFO L226 Difference]: Without dead ends: 11174 [2022-11-03 03:00:06,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1062 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:00:06,809 INFO L413 NwaCegarLoop]: 736 mSDtfsCounter, 844 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 1619 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:00:06,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 1619 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:00:06,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11174 states. [2022-11-03 03:00:06,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11174 to 4546. [2022-11-03 03:00:06,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4546 states, 4545 states have (on average 1.375137513751375) internal successors, (6250), 4545 states have internal predecessors, (6250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:00:06,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4546 states to 4546 states and 6250 transitions. [2022-11-03 03:00:06,892 INFO L78 Accepts]: Start accepts. Automaton has 4546 states and 6250 transitions. Word has length 359 [2022-11-03 03:00:06,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:00:06,892 INFO L495 AbstractCegarLoop]: Abstraction has 4546 states and 6250 transitions. [2022-11-03 03:00:06,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:00:06,892 INFO L276 IsEmpty]: Start isEmpty. Operand 4546 states and 6250 transitions. [2022-11-03 03:00:06,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:00:06,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:00:06,896 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:00:06,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (121)] Ended with exit code 0 [2022-11-03 03:00:07,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (120)] Ended with exit code 0 [2022-11-03 03:00:07,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:00:07,297 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:00:07,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:00:07,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1770823055, now seen corresponding path program 1 times [2022-11-03 03:00:07,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:00:07,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129062843] [2022-11-03 03:00:07,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:00:07,299 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:00:07,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:00:07,300 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:00:07,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (122)] Waiting until timeout for monitored process [2022-11-03 03:00:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:00:08,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:00:08,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:00:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 165 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:00:09,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:00:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 165 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:00:09,540 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:00:09,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129062843] [2022-11-03 03:00:09,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129062843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:00:09,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1720608117] [2022-11-03 03:00:09,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:00:09,540 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:00:09,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:00:09,541 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:00:09,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (123)] Waiting until timeout for monitored process [2022-11-03 03:00:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:00:11,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:00:11,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:00:12,573 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 39 proven. 37 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:00:12,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:00:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 39 proven. 37 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:00:14,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1720608117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:00:14,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358504740] [2022-11-03 03:00:14,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:00:14,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:00:14,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:00:14,090 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:00:14,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-11-03 03:00:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:00:14,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:00:14,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:00:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 155 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:00:15,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:00:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 155 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:00:16,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358504740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:00:16,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:00:16,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11, 11, 6, 6] total 37 [2022-11-03 03:00:16,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037837243] [2022-11-03 03:00:16,784 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:00:16,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 03:00:16,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:00:16,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 03:00:16,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1243, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 03:00:16,786 INFO L87 Difference]: Start difference. First operand 4546 states and 6250 transitions. Second operand has 37 states, 37 states have (on average 38.13513513513514) internal successors, (1411), 37 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:00:21,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:00:21,712 INFO L93 Difference]: Finished difference Result 16484 states and 22786 transitions. [2022-11-03 03:00:21,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-03 03:00:21,712 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 38.13513513513514) internal successors, (1411), 37 states have internal predecessors, (1411), 0 states have call successors, (0), 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 359 [2022-11-03 03:00:21,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:00:21,719 INFO L225 Difference]: With dead ends: 16484 [2022-11-03 03:00:21,719 INFO L226 Difference]: Without dead ends: 12385 [2022-11-03 03:00:21,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2202 GetRequests, 2114 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1466 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=916, Invalid=7094, Unknown=0, NotChecked=0, Total=8010 [2022-11-03 03:00:21,722 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 4870 mSDsluCounter, 12092 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4870 SdHoareTripleChecker+Valid, 12647 SdHoareTripleChecker+Invalid, 2676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1586 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:00:21,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4870 Valid, 12647 Invalid, 2676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1064 Invalid, 0 Unknown, 1586 Unchecked, 1.3s Time] [2022-11-03 03:00:21,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12385 states. [2022-11-03 03:00:21,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12385 to 4650. [2022-11-03 03:00:21,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4650 states, 4649 states have (on average 1.3663153366315337) internal successors, (6352), 4649 states have internal predecessors, (6352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:00:21,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4650 states to 4650 states and 6352 transitions. [2022-11-03 03:00:21,805 INFO L78 Accepts]: Start accepts. Automaton has 4650 states and 6352 transitions. Word has length 359 [2022-11-03 03:00:21,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:00:21,806 INFO L495 AbstractCegarLoop]: Abstraction has 4650 states and 6352 transitions. [2022-11-03 03:00:21,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 38.13513513513514) internal successors, (1411), 37 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:00:21,806 INFO L276 IsEmpty]: Start isEmpty. Operand 4650 states and 6352 transitions. [2022-11-03 03:00:21,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-11-03 03:00:21,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:00:21,811 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:00:21,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (122)] Ended with exit code 0 [2022-11-03 03:00:22,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-11-03 03:00:22,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (123)] Ended with exit code 0 [2022-11-03 03:00:22,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:00:22,412 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:00:22,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:00:22,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1940631135, now seen corresponding path program 1 times [2022-11-03 03:00:22,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:00:22,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671289551] [2022-11-03 03:00:22,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:00:22,415 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:00:22,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:00:22,416 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:00:22,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (125)] Waiting until timeout for monitored process [2022-11-03 03:00:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:00:23,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:00:23,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:00:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 11 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-11-03 03:00:24,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:00:25,370 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 11 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-11-03 03:00:25,370 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:00:25,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671289551] [2022-11-03 03:00:25,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671289551] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:00:25,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1750283229] [2022-11-03 03:00:25,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:00:25,370 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:00:25,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:00:25,371 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:00:25,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (126)] Waiting until timeout for monitored process [2022-11-03 03:00:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:00:27,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:00:27,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:00:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 39 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-11-03 03:00:29,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:00:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 39 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-11-03 03:00:30,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1750283229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:00:30,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255718604] [2022-11-03 03:00:30,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:00:30,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:00:30,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:00:30,656 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:00:30,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-11-03 03:00:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:00:31,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:00:31,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:00:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 11 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-11-03 03:00:32,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:00:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 11 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-11-03 03:00:33,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255718604] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:00:33,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:00:33,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 11, 11, 6, 6] total 25 [2022-11-03 03:00:33,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673251977] [2022-11-03 03:00:33,389 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:00:33,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 03:00:33,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:00:33,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 03:00:33,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2022-11-03 03:00:33,391 INFO L87 Difference]: Start difference. First operand 4650 states and 6352 transitions. Second operand has 25 states, 25 states have (on average 41.88) internal successors, (1047), 25 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:00:38,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:00:38,413 INFO L93 Difference]: Finished difference Result 42922 states and 59571 transitions. [2022-11-03 03:00:38,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-03 03:00:38,414 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 41.88) internal successors, (1047), 25 states have internal predecessors, (1047), 0 states have call successors, (0), 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 536 [2022-11-03 03:00:38,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:00:38,528 INFO L225 Difference]: With dead ends: 42922 [2022-11-03 03:00:38,528 INFO L226 Difference]: Without dead ends: 38755 [2022-11-03 03:00:38,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3277 GetRequests, 3186 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2054 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1557, Invalid=6815, Unknown=0, NotChecked=0, Total=8372 [2022-11-03 03:00:38,535 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 8248 mSDsluCounter, 5899 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8248 SdHoareTripleChecker+Valid, 6471 SdHoareTripleChecker+Invalid, 2167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1592 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:00:38,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8248 Valid, 6471 Invalid, 2167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 480 Invalid, 0 Unknown, 1592 Unchecked, 0.9s Time] [2022-11-03 03:00:38,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38755 states. [2022-11-03 03:00:38,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38755 to 4734. [2022-11-03 03:00:38,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4734 states, 4733 states have (on average 1.3598140714134799) internal successors, (6436), 4733 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:00:38,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4734 states to 4734 states and 6436 transitions. [2022-11-03 03:00:38,687 INFO L78 Accepts]: Start accepts. Automaton has 4734 states and 6436 transitions. Word has length 536 [2022-11-03 03:00:38,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:00:38,687 INFO L495 AbstractCegarLoop]: Abstraction has 4734 states and 6436 transitions. [2022-11-03 03:00:38,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 41.88) internal successors, (1047), 25 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:00:38,688 INFO L276 IsEmpty]: Start isEmpty. Operand 4734 states and 6436 transitions. [2022-11-03 03:00:38,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-11-03 03:00:38,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:00:38,695 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:00:38,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (125)] Ended with exit code 0 [2022-11-03 03:00:38,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-11-03 03:00:39,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (126)] Forceful destruction successful, exit code 0 [2022-11-03 03:00:39,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:00:39,296 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:00:39,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:00:39,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1854449375, now seen corresponding path program 1 times [2022-11-03 03:00:39,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:00:39,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1633765768] [2022-11-03 03:00:39,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:00:39,299 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:00:39,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:00:39,300 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:00:39,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (128)] Waiting until timeout for monitored process [2022-11-03 03:00:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:00:40,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:00:40,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:00:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 13 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-11-03 03:00:41,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:00:42,225 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 13 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-11-03 03:00:42,226 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:00:42,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1633765768] [2022-11-03 03:00:42,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1633765768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:00:42,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [175929541] [2022-11-03 03:00:42,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:00:42,226 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:00:42,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:00:42,230 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:00:42,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (129)] Waiting until timeout for monitored process [2022-11-03 03:00:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:00:44,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:00:44,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:00:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 41 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-11-03 03:00:45,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:00:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 41 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-11-03 03:00:47,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [175929541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:00:47,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814678693] [2022-11-03 03:00:47,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:00:47,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:00:47,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:00:47,375 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:00:47,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-11-03 03:00:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:00:48,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:00:48,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:00:49,072 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 13 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-11-03 03:00:49,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:00:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 13 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-11-03 03:00:50,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814678693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:00:50,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:00:50,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 11, 11, 6, 6] total 25 [2022-11-03 03:00:50,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611797678] [2022-11-03 03:00:50,160 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:00:50,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 03:00:50,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:00:50,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 03:00:50,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2022-11-03 03:00:50,165 INFO L87 Difference]: Start difference. First operand 4734 states and 6436 transitions. Second operand has 25 states, 25 states have (on average 42.04) internal successors, (1051), 25 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:00:53,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:00:53,985 INFO L93 Difference]: Finished difference Result 31759 states and 43741 transitions. [2022-11-03 03:00:53,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-03 03:00:53,986 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 42.04) internal successors, (1051), 25 states have internal predecessors, (1051), 0 states have call successors, (0), 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 536 [2022-11-03 03:00:53,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:00:54,009 INFO L225 Difference]: With dead ends: 31759 [2022-11-03 03:00:54,010 INFO L226 Difference]: Without dead ends: 27524 [2022-11-03 03:00:54,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3258 GetRequests, 3187 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1124, Invalid=3988, Unknown=0, NotChecked=0, Total=5112 [2022-11-03 03:00:54,020 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 6198 mSDsluCounter, 5232 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6198 SdHoareTripleChecker+Valid, 5746 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1061 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:00:54,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6198 Valid, 5746 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 609 Invalid, 0 Unknown, 1061 Unchecked, 0.9s Time] [2022-11-03 03:00:54,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27524 states. [2022-11-03 03:00:54,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27524 to 4818. [2022-11-03 03:00:54,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4818 states, 4817 states have (on average 1.3535395474361636) internal successors, (6520), 4817 states have internal predecessors, (6520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:00:54,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4818 states to 4818 states and 6520 transitions. [2022-11-03 03:00:54,228 INFO L78 Accepts]: Start accepts. Automaton has 4818 states and 6520 transitions. Word has length 536 [2022-11-03 03:00:54,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:00:54,229 INFO L495 AbstractCegarLoop]: Abstraction has 4818 states and 6520 transitions. [2022-11-03 03:00:54,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 42.04) internal successors, (1051), 25 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:00:54,229 INFO L276 IsEmpty]: Start isEmpty. Operand 4818 states and 6520 transitions. [2022-11-03 03:00:54,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-11-03 03:00:54,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:00:54,236 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:00:54,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (129)] Forceful destruction successful, exit code 0 [2022-11-03 03:00:54,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-11-03 03:00:54,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (128)] Ended with exit code 0 [2022-11-03 03:00:54,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:00:54,837 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:00:54,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:00:54,837 INFO L85 PathProgramCache]: Analyzing trace with hash 357154655, now seen corresponding path program 1 times [2022-11-03 03:00:54,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:00:54,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082324720] [2022-11-03 03:00:54,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:00:54,839 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:00:54,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:00:54,840 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:00:54,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (131)] Waiting until timeout for monitored process [2022-11-03 03:00:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:00:55,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:00:55,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:00:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 15 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-11-03 03:00:56,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:00:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 15 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-11-03 03:00:57,745 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:00:57,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082324720] [2022-11-03 03:00:57,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082324720] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:00:57,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1516848111] [2022-11-03 03:00:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:00:57,745 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:00:57,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:00:57,746 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:00:57,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (132)] Waiting until timeout for monitored process [2022-11-03 03:01:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:00,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:01:00,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 45 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-03 03:01:01,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:01:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 45 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-03 03:01:03,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1516848111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:01:03,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812488183] [2022-11-03 03:01:03,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:03,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:01:03,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:01:03,370 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:01:03,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-11-03 03:01:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:04,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:01:04,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 15 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-11-03 03:01:05,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:01:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 15 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-11-03 03:01:06,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812488183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:01:06,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:01:06,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 12, 12, 6, 6] total 27 [2022-11-03 03:01:06,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596949838] [2022-11-03 03:01:06,307 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:01:06,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 03:01:06,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:01:06,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 03:01:06,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2022-11-03 03:01:06,310 INFO L87 Difference]: Start difference. First operand 4818 states and 6520 transitions. Second operand has 27 states, 27 states have (on average 39.22222222222222) internal successors, (1059), 27 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:01:16,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:01:16,523 INFO L93 Difference]: Finished difference Result 62693 states and 86180 transitions. [2022-11-03 03:01:16,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-11-03 03:01:16,524 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 39.22222222222222) internal successors, (1059), 27 states have internal predecessors, (1059), 0 states have call successors, (0), 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 536 [2022-11-03 03:01:16,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:01:16,562 INFO L225 Difference]: With dead ends: 62693 [2022-11-03 03:01:16,562 INFO L226 Difference]: Without dead ends: 58390 [2022-11-03 03:01:16,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3311 GetRequests, 3184 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4419 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=3275, Invalid=12981, Unknown=0, NotChecked=0, Total=16256 [2022-11-03 03:01:16,575 INFO L413 NwaCegarLoop]: 772 mSDtfsCounter, 9436 mSDsluCounter, 12493 mSDsCounter, 0 mSdLazyCounter, 1827 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9436 SdHoareTripleChecker+Valid, 13265 SdHoareTripleChecker+Invalid, 5150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3223 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:01:16,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9436 Valid, 13265 Invalid, 5150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1827 Invalid, 0 Unknown, 3223 Unchecked, 2.5s Time] [2022-11-03 03:01:16,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58390 states. [2022-11-03 03:01:16,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58390 to 4908. [2022-11-03 03:01:16,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4908 states, 4907 states have (on average 1.3476665987364989) internal successors, (6613), 4907 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:01:16,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4908 states to 4908 states and 6613 transitions. [2022-11-03 03:01:16,802 INFO L78 Accepts]: Start accepts. Automaton has 4908 states and 6613 transitions. Word has length 536 [2022-11-03 03:01:16,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:01:16,802 INFO L495 AbstractCegarLoop]: Abstraction has 4908 states and 6613 transitions. [2022-11-03 03:01:16,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 39.22222222222222) internal successors, (1059), 27 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:01:16,802 INFO L276 IsEmpty]: Start isEmpty. Operand 4908 states and 6613 transitions. [2022-11-03 03:01:16,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-11-03 03:01:16,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:01:16,808 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:01:16,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (132)] Forceful destruction successful, exit code 0 [2022-11-03 03:01:17,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-11-03 03:01:17,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (131)] Forceful destruction successful, exit code 0 [2022-11-03 03:01:17,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:01:17,409 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:01:17,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:01:17,409 INFO L85 PathProgramCache]: Analyzing trace with hash -937097249, now seen corresponding path program 1 times [2022-11-03 03:01:17,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:01:17,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961400181] [2022-11-03 03:01:17,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:17,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:01:17,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:01:17,413 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:01:17,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (134)] Waiting until timeout for monitored process [2022-11-03 03:01:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:18,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:01:18,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 33 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-03 03:01:19,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:01:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 33 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-03 03:01:20,667 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:01:20,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961400181] [2022-11-03 03:01:20,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961400181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:01:20,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1777639642] [2022-11-03 03:01:20,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:20,667 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:01:20,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:01:20,668 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:01:20,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (135)] Waiting until timeout for monitored process [2022-11-03 03:01:23,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:23,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:01:23,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:24,724 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 47 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-03 03:01:24,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:01:26,492 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 47 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-03 03:01:26,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1777639642] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:01:26,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951214001] [2022-11-03 03:01:26,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:26,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:01:26,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:01:26,494 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:01:26,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-11-03 03:01:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:27,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:01:27,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 33 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-03 03:01:28,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:01:29,624 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 33 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-03 03:01:29,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951214001] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:01:29,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:01:29,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 12, 12, 7, 7] total 30 [2022-11-03 03:01:29,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030988782] [2022-11-03 03:01:29,625 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:01:29,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 03:01:29,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:01:29,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 03:01:29,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:01:29,627 INFO L87 Difference]: Start difference. First operand 4908 states and 6613 transitions. Second operand has 30 states, 30 states have (on average 36.93333333333333) internal successors, (1108), 30 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:01:45,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:01:45,574 INFO L93 Difference]: Finished difference Result 53353 states and 72871 transitions. [2022-11-03 03:01:45,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-11-03 03:01:45,576 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 36.93333333333333) internal successors, (1108), 30 states have internal predecessors, (1108), 0 states have call successors, (0), 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 536 [2022-11-03 03:01:45,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:01:45,606 INFO L225 Difference]: With dead ends: 53353 [2022-11-03 03:01:45,606 INFO L226 Difference]: Without dead ends: 49040 [2022-11-03 03:01:45,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3362 GetRequests, 3185 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10125 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=5900, Invalid=25606, Unknown=0, NotChecked=0, Total=31506 [2022-11-03 03:01:45,615 INFO L413 NwaCegarLoop]: 942 mSDtfsCounter, 9072 mSDsluCounter, 14794 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9072 SdHoareTripleChecker+Valid, 15736 SdHoareTripleChecker+Invalid, 5721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3576 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:01:45,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9072 Valid, 15736 Invalid, 5721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2082 Invalid, 0 Unknown, 3576 Unchecked, 3.1s Time] [2022-11-03 03:01:45,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49040 states. [2022-11-03 03:01:45,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49040 to 4914. [2022-11-03 03:01:45,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4914 states, 4913 states have (on average 1.3466313861184611) internal successors, (6616), 4913 states have internal predecessors, (6616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:01:45,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4914 states to 4914 states and 6616 transitions. [2022-11-03 03:01:45,823 INFO L78 Accepts]: Start accepts. Automaton has 4914 states and 6616 transitions. Word has length 536 [2022-11-03 03:01:45,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:01:45,823 INFO L495 AbstractCegarLoop]: Abstraction has 4914 states and 6616 transitions. [2022-11-03 03:01:45,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 36.93333333333333) internal successors, (1108), 30 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:01:45,824 INFO L276 IsEmpty]: Start isEmpty. Operand 4914 states and 6616 transitions. [2022-11-03 03:01:45,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-11-03 03:01:45,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:01:45,829 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:01:45,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (135)] Ended with exit code 0 [2022-11-03 03:01:46,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-11-03 03:01:46,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (134)] Ended with exit code 0 [2022-11-03 03:01:46,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:01:46,430 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:01:46,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:01:46,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1304924065, now seen corresponding path program 1 times [2022-11-03 03:01:46,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:01:46,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [65866425] [2022-11-03 03:01:46,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:46,433 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:01:46,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:01:46,434 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:01:46,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (137)] Waiting until timeout for monitored process [2022-11-03 03:01:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:47,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:01:47,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 35 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-03 03:01:48,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:01:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 35 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-03 03:01:49,793 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:01:49,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [65866425] [2022-11-03 03:01:49,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [65866425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:01:49,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1411368464] [2022-11-03 03:01:49,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:49,793 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:01:49,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:01:49,794 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:01:49,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (138)] Waiting until timeout for monitored process [2022-11-03 03:01:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:52,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:01:52,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:53,978 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 49 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-11-03 03:01:53,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:01:55,705 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 49 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-11-03 03:01:55,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1411368464] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:01:55,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961852951] [2022-11-03 03:01:55,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:55,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:01:55,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:01:55,707 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:01:55,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-11-03 03:01:56,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:56,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:01:56,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:57,689 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 35 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-03 03:01:57,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:01:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 35 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-03 03:01:59,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961852951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:01:59,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:01:59,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 12, 12, 8, 8] total 31 [2022-11-03 03:01:59,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619501185] [2022-11-03 03:01:59,000 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:01:59,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 03:01:59,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:01:59,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 03:01:59,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2022-11-03 03:01:59,005 INFO L87 Difference]: Start difference. First operand 4914 states and 6616 transitions. Second operand has 31 states, 31 states have (on average 35.87096774193548) internal successors, (1112), 31 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:02:10,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:02:10,394 INFO L93 Difference]: Finished difference Result 36855 states and 50017 transitions. [2022-11-03 03:02:10,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-11-03 03:02:10,395 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 35.87096774193548) internal successors, (1112), 31 states have internal predecessors, (1112), 0 states have call successors, (0), 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 536 [2022-11-03 03:02:10,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:02:10,417 INFO L225 Difference]: With dead ends: 36855 [2022-11-03 03:02:10,417 INFO L226 Difference]: Without dead ends: 32536 [2022-11-03 03:02:10,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3317 GetRequests, 3182 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4956 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=3638, Invalid=14722, Unknown=0, NotChecked=0, Total=18360 [2022-11-03 03:02:10,427 INFO L413 NwaCegarLoop]: 638 mSDtfsCounter, 7142 mSDsluCounter, 11279 mSDsCounter, 0 mSdLazyCounter, 1731 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7142 SdHoareTripleChecker+Valid, 11917 SdHoareTripleChecker+Invalid, 3790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1995 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:02:10,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7142 Valid, 11917 Invalid, 3790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1731 Invalid, 0 Unknown, 1995 Unchecked, 2.5s Time] [2022-11-03 03:02:10,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32536 states. [2022-11-03 03:02:10,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32536 to 4920. [2022-11-03 03:02:10,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4920 states, 4919 states have (on average 1.3455986989225452) internal successors, (6619), 4919 states have internal predecessors, (6619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:02:10,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4920 states to 4920 states and 6619 transitions. [2022-11-03 03:02:10,699 INFO L78 Accepts]: Start accepts. Automaton has 4920 states and 6619 transitions. Word has length 536 [2022-11-03 03:02:10,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:02:10,700 INFO L495 AbstractCegarLoop]: Abstraction has 4920 states and 6619 transitions. [2022-11-03 03:02:10,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 35.87096774193548) internal successors, (1112), 31 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:02:10,700 INFO L276 IsEmpty]: Start isEmpty. Operand 4920 states and 6619 transitions. [2022-11-03 03:02:10,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-11-03 03:02:10,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:02:10,708 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:02:10,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (138)] Ended with exit code 0 [2022-11-03 03:02:10,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-11-03 03:02:11,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (137)] Forceful destruction successful, exit code 0 [2022-11-03 03:02:11,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:02:11,311 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:02:11,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:02:11,312 INFO L85 PathProgramCache]: Analyzing trace with hash -2096367393, now seen corresponding path program 1 times [2022-11-03 03:02:11,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:02:11,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098803626] [2022-11-03 03:02:11,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:02:11,314 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:02:11,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:02:11,315 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:02:11,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (140)] Waiting until timeout for monitored process [2022-11-03 03:02:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:02:12,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:02:12,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:02:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 46 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-03 03:02:13,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:02:14,042 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 46 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-03 03:02:14,042 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:02:14,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098803626] [2022-11-03 03:02:14,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098803626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:02:14,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [219598770] [2022-11-03 03:02:14,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:02:14,043 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:02:14,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:02:14,044 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:02:14,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (141)] Waiting until timeout for monitored process [2022-11-03 03:02:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:02:16,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:02:16,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:02:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 51 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-03 03:02:18,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:02:19,968 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 51 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-03 03:02:19,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [219598770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:02:19,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471522887] [2022-11-03 03:02:19,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:02:19,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:02:19,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:02:19,970 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:02:19,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-11-03 03:02:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:02:21,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:02:21,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:02:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 31 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-11-03 03:02:22,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:02:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 31 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-11-03 03:02:24,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471522887] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:02:24,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:02:24,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12, 12, 7, 7] total 42 [2022-11-03 03:02:24,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3377444] [2022-11-03 03:02:24,156 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:02:24,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 03:02:24,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:02:24,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 03:02:24,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1615, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 03:02:24,159 INFO L87 Difference]: Start difference. First operand 4920 states and 6619 transitions. Second operand has 42 states, 42 states have (on average 36.5) internal successors, (1533), 42 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:02:28,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:02:28,804 INFO L93 Difference]: Finished difference Result 16789 states and 22519 transitions. [2022-11-03 03:02:28,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-03 03:02:28,805 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 36.5) internal successors, (1533), 42 states have internal predecessors, (1533), 0 states have call successors, (0), 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 536 [2022-11-03 03:02:28,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:02:28,815 INFO L225 Difference]: With dead ends: 16789 [2022-11-03 03:02:28,815 INFO L226 Difference]: Without dead ends: 12448 [2022-11-03 03:02:28,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3259 GetRequests, 3171 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=847, Invalid=6809, Unknown=0, NotChecked=0, Total=7656 [2022-11-03 03:02:28,819 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 1887 mSDsluCounter, 14173 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1887 SdHoareTripleChecker+Valid, 14676 SdHoareTripleChecker+Invalid, 2096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1027 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:02:28,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1887 Valid, 14676 Invalid, 2096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1061 Invalid, 0 Unknown, 1027 Unchecked, 1.2s Time] [2022-11-03 03:02:28,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12448 states. [2022-11-03 03:02:28,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12448 to 5216. [2022-11-03 03:02:28,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5216 states, 5215 states have (on average 1.337679769894535) internal successors, (6976), 5215 states have internal predecessors, (6976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:02:28,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5216 states to 5216 states and 6976 transitions. [2022-11-03 03:02:28,916 INFO L78 Accepts]: Start accepts. Automaton has 5216 states and 6976 transitions. Word has length 536 [2022-11-03 03:02:28,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:02:28,917 INFO L495 AbstractCegarLoop]: Abstraction has 5216 states and 6976 transitions. [2022-11-03 03:02:28,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 36.5) internal successors, (1533), 42 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:02:28,917 INFO L276 IsEmpty]: Start isEmpty. Operand 5216 states and 6976 transitions. [2022-11-03 03:02:28,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-11-03 03:02:28,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:02:28,922 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:02:28,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (140)] Ended with exit code 0 [2022-11-03 03:02:29,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-11-03 03:02:29,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (141)] Ended with exit code 0 [2022-11-03 03:02:29,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:02:29,525 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:02:29,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:02:29,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1638950433, now seen corresponding path program 1 times [2022-11-03 03:02:29,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:02:29,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763491199] [2022-11-03 03:02:29,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:02:29,529 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:02:29,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:02:29,530 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:02:29,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (143)] Waiting until timeout for monitored process [2022-11-03 03:02:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:02:30,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:02:30,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:02:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 48 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-03 03:02:32,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:02:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 48 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-03 03:02:32,570 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:02:32,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763491199] [2022-11-03 03:02:32,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763491199] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:02:32,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1058888731] [2022-11-03 03:02:32,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:02:32,571 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:02:32,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:02:32,572 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:02:32,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (144)] Waiting until timeout for monitored process [2022-11-03 03:02:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:02:35,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:02:35,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:02:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 53 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-03 03:02:36,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:02:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 53 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-03 03:02:38,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1058888731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:02:38,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869122531] [2022-11-03 03:02:38,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:02:38,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:02:38,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:02:38,517 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:02:38,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-11-03 03:02:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:02:39,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:02:39,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:02:40,768 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 7 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-03 03:02:40,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:02:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 7 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-03 03:02:42,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869122531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:02:42,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:02:42,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 11, 7, 7] total 38 [2022-11-03 03:02:42,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837663461] [2022-11-03 03:02:42,365 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:02:42,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 03:02:42,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:02:42,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 03:02:42,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1314, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 03:02:42,366 INFO L87 Difference]: Start difference. First operand 5216 states and 6976 transitions. Second operand has 38 states, 38 states have (on average 40.078947368421055) internal successors, (1523), 38 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:03:00,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:03:00,422 INFO L93 Difference]: Finished difference Result 55532 states and 75221 transitions. [2022-11-03 03:03:00,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-11-03 03:03:00,423 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 40.078947368421055) internal successors, (1523), 38 states have internal predecessors, (1523), 0 states have call successors, (0), 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 536 [2022-11-03 03:03:00,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:03:00,457 INFO L225 Difference]: With dead ends: 55532 [2022-11-03 03:03:00,457 INFO L226 Difference]: Without dead ends: 50400 [2022-11-03 03:03:00,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3339 GetRequests, 3174 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8895 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=4085, Invalid=23637, Unknown=0, NotChecked=0, Total=27722 [2022-11-03 03:03:00,467 INFO L413 NwaCegarLoop]: 806 mSDtfsCounter, 29371 mSDsluCounter, 15768 mSDsCounter, 0 mSdLazyCounter, 3397 mSolverCounterSat, 648 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29371 SdHoareTripleChecker+Valid, 16574 SdHoareTripleChecker+Invalid, 6558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 648 IncrementalHoareTripleChecker+Valid, 3397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2513 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:03:00,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29371 Valid, 16574 Invalid, 6558 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [648 Valid, 3397 Invalid, 0 Unknown, 2513 Unchecked, 5.1s Time] [2022-11-03 03:03:00,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50400 states. [2022-11-03 03:03:00,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50400 to 7231. [2022-11-03 03:03:00,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7231 states, 7230 states have (on average 1.3384508990318118) internal successors, (9677), 7230 states have internal predecessors, (9677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:03:00,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7231 states to 7231 states and 9677 transitions. [2022-11-03 03:03:00,712 INFO L78 Accepts]: Start accepts. Automaton has 7231 states and 9677 transitions. Word has length 536 [2022-11-03 03:03:00,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:03:00,712 INFO L495 AbstractCegarLoop]: Abstraction has 7231 states and 9677 transitions. [2022-11-03 03:03:00,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 40.078947368421055) internal successors, (1523), 38 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:03:00,713 INFO L276 IsEmpty]: Start isEmpty. Operand 7231 states and 9677 transitions. [2022-11-03 03:03:00,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-11-03 03:03:00,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:03:00,718 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:03:00,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (143)] Ended with exit code 0 [2022-11-03 03:03:00,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (144)] Ended with exit code 0 [2022-11-03 03:03:01,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-11-03 03:03:01,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:03:01,319 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:03:01,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:03:01,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1155328229, now seen corresponding path program 1 times [2022-11-03 03:03:01,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:03:01,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543039104] [2022-11-03 03:03:01,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:03:01,322 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:03:01,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:03:01,323 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:03:01,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (146)] Waiting until timeout for monitored process [2022-11-03 03:03:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:03:02,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:03:02,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:03:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 70 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-03 03:03:03,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:03:04,418 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 70 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-03 03:03:04,418 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:03:04,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543039104] [2022-11-03 03:03:04,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543039104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:03:04,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1678303383] [2022-11-03 03:03:04,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:03:04,419 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:03:04,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:03:04,420 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:03:04,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (147)] Waiting until timeout for monitored process [2022-11-03 03:03:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:03:07,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:03:07,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:03:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 55 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-03 03:03:08,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:03:10,465 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 55 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-03 03:03:10,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1678303383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:03:10,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994334485] [2022-11-03 03:03:10,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:03:10,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:03:10,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:03:10,467 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:03:10,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-11-03 03:03:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:03:11,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:03:11,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:03:12,729 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 71 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-03 03:03:12,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:03:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 71 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-03 03:03:14,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994334485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:03:14,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:03:14,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12, 12, 7, 7] total 44 [2022-11-03 03:03:14,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441271792] [2022-11-03 03:03:14,246 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:03:14,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 03:03:14,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:03:14,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 03:03:14,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1783, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 03:03:14,248 INFO L87 Difference]: Start difference. First operand 7231 states and 9677 transitions. Second operand has 44 states, 44 states have (on average 38.40909090909091) internal successors, (1690), 44 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:03:53,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:03:53,725 INFO L93 Difference]: Finished difference Result 65635 states and 88505 transitions. [2022-11-03 03:03:53,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2022-11-03 03:03:53,726 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 38.40909090909091) internal successors, (1690), 44 states have internal predecessors, (1690), 0 states have call successors, (0), 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 536 [2022-11-03 03:03:53,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:03:53,763 INFO L225 Difference]: With dead ends: 65635 [2022-11-03 03:03:53,763 INFO L226 Difference]: Without dead ends: 59401 [2022-11-03 03:03:53,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3487 GetRequests, 3171 SyntacticMatches, 0 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38459 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=10945, Invalid=89861, Unknown=0, NotChecked=0, Total=100806 [2022-11-03 03:03:53,775 INFO L413 NwaCegarLoop]: 1675 mSDtfsCounter, 32503 mSDsluCounter, 34863 mSDsCounter, 0 mSdLazyCounter, 6990 mSolverCounterSat, 474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32503 SdHoareTripleChecker+Valid, 36538 SdHoareTripleChecker+Invalid, 12268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 6990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4804 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:03:53,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32503 Valid, 36538 Invalid, 12268 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [474 Valid, 6990 Invalid, 0 Unknown, 4804 Unchecked, 9.2s Time] [2022-11-03 03:03:53,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59401 states. [2022-11-03 03:03:54,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59401 to 7303. [2022-11-03 03:03:54,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7303 states, 7302 states have (on average 1.3374417967680088) internal successors, (9766), 7302 states have internal predecessors, (9766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:03:54,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7303 states to 7303 states and 9766 transitions. [2022-11-03 03:03:54,019 INFO L78 Accepts]: Start accepts. Automaton has 7303 states and 9766 transitions. Word has length 536 [2022-11-03 03:03:54,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:03:54,019 INFO L495 AbstractCegarLoop]: Abstraction has 7303 states and 9766 transitions. [2022-11-03 03:03:54,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 38.40909090909091) internal successors, (1690), 44 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:03:54,020 INFO L276 IsEmpty]: Start isEmpty. Operand 7303 states and 9766 transitions. [2022-11-03 03:03:54,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-11-03 03:03:54,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:03:54,025 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:03:54,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (147)] Ended with exit code 0 [2022-11-03 03:03:54,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (146)] Ended with exit code 0 [2022-11-03 03:03:54,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-11-03 03:03:54,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:03:54,626 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:03:54,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:03:54,627 INFO L85 PathProgramCache]: Analyzing trace with hash 174403549, now seen corresponding path program 1 times [2022-11-03 03:03:54,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:03:54,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404519366] [2022-11-03 03:03:54,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:03:54,629 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:03:54,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:03:54,630 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:03:54,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (149)] Waiting until timeout for monitored process [2022-11-03 03:03:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:03:55,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:03:55,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:03:56,805 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 76 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-11-03 03:03:56,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:03:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 76 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-11-03 03:03:57,411 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:03:57,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404519366] [2022-11-03 03:03:57,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404519366] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:03:57,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [227801044] [2022-11-03 03:03:57,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:03:57,412 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:03:57,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:03:57,413 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:03:57,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (150)] Waiting until timeout for monitored process [2022-11-03 03:03:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:03:59,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:03:59,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:04:01,532 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 57 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-03 03:04:01,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:04:03,425 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 57 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-03 03:04:03,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [227801044] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:04:03,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763948669] [2022-11-03 03:04:03,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:04:03,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:04:03,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:04:03,427 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:04:03,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-11-03 03:04:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:04:04,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:04:04,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:04:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 21 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-11-03 03:04:05,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:04:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 21 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-11-03 03:04:07,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763948669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:04:07,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:04:07,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12, 12, 8, 8] total 40 [2022-11-03 03:04:07,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785502722] [2022-11-03 03:04:07,231 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:04:07,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 03:04:07,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:04:07,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 03:04:07,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1452, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 03:04:07,234 INFO L87 Difference]: Start difference. First operand 7303 states and 9766 transitions. Second operand has 40 states, 40 states have (on average 40.125) internal successors, (1605), 40 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:05:00,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:05:00,675 INFO L93 Difference]: Finished difference Result 205109 states and 280328 transitions. [2022-11-03 03:05:00,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 445 states. [2022-11-03 03:05:00,676 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 40.125) internal successors, (1605), 40 states have internal predecessors, (1605), 0 states have call successors, (0), 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 536 [2022-11-03 03:05:00,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:05:00,993 INFO L225 Difference]: With dead ends: 205109 [2022-11-03 03:05:00,993 INFO L226 Difference]: Without dead ends: 198863 [2022-11-03 03:05:01,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3704 GetRequests, 3179 SyntacticMatches, 45 SemanticMatches, 480 ConstructedPredicates, 0 IntricatePredicates, 12 DeprecatedPredicates, 110941 ImplicationChecksByTransitivity, 40.3s TimeCoverageRelationStatistics Valid=22922, Invalid=208920, Unknown=0, NotChecked=0, Total=231842 [2022-11-03 03:05:01,032 INFO L413 NwaCegarLoop]: 1836 mSDtfsCounter, 24966 mSDsluCounter, 51653 mSDsCounter, 0 mSdLazyCounter, 6523 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24966 SdHoareTripleChecker+Valid, 53489 SdHoareTripleChecker+Invalid, 23434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 6523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16545 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:05:01,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24966 Valid, 53489 Invalid, 23434 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [366 Valid, 6523 Invalid, 0 Unknown, 16545 Unchecked, 8.3s Time] [2022-11-03 03:05:01,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198863 states. [2022-11-03 03:05:02,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198863 to 13957. [2022-11-03 03:05:02,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13957 states, 13956 states have (on average 1.3446546288334766) internal successors, (18766), 13956 states have internal predecessors, (18766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:05:02,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13957 states to 13957 states and 18766 transitions. [2022-11-03 03:05:02,252 INFO L78 Accepts]: Start accepts. Automaton has 13957 states and 18766 transitions. Word has length 536 [2022-11-03 03:05:02,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:05:02,252 INFO L495 AbstractCegarLoop]: Abstraction has 13957 states and 18766 transitions. [2022-11-03 03:05:02,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 40.125) internal successors, (1605), 40 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:05:02,252 INFO L276 IsEmpty]: Start isEmpty. Operand 13957 states and 18766 transitions. [2022-11-03 03:05:02,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-11-03 03:05:02,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:05:02,264 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:05:02,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-11-03 03:05:02,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (150)] Ended with exit code 0 [2022-11-03 03:05:02,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (149)] Ended with exit code 0 [2022-11-03 03:05:02,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:05:02,877 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:05:02,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:05:02,878 INFO L85 PathProgramCache]: Analyzing trace with hash -533007781, now seen corresponding path program 1 times [2022-11-03 03:05:02,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:05:02,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754330011] [2022-11-03 03:05:02,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:05:02,880 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:05:02,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:05:02,881 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:05:02,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (152)] Waiting until timeout for monitored process [2022-11-03 03:05:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:05:04,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:05:04,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:05:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 87 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-03 03:05:05,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:05:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 87 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-03 03:05:06,552 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:05:06,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754330011] [2022-11-03 03:05:06,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754330011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:05:06,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [181908407] [2022-11-03 03:05:06,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:05:06,553 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:05:06,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:05:06,557 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:05:06,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (153)] Waiting until timeout for monitored process [2022-11-03 03:05:09,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:05:09,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:05:09,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:05:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 59 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-03 03:05:10,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:05:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 59 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-03 03:05:12,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [181908407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:05:12,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026617636] [2022-11-03 03:05:12,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:05:12,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:05:12,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:05:12,499 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:05:12,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-11-03 03:05:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:05:13,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:05:13,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:05:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 87 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-03 03:05:14,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:05:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 87 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-03 03:05:15,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026617636] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:05:15,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:05:15,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 12, 12, 8, 8] total 31 [2022-11-03 03:05:15,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677331337] [2022-11-03 03:05:15,958 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:05:15,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 03:05:15,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:05:15,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 03:05:15,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2022-11-03 03:05:15,961 INFO L87 Difference]: Start difference. First operand 13957 states and 18766 transitions. Second operand has 31 states, 31 states have (on average 39.806451612903224) internal successors, (1234), 31 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:05:28,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:05:28,430 INFO L93 Difference]: Finished difference Result 115966 states and 156162 transitions. [2022-11-03 03:05:28,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-03 03:05:28,431 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 39.806451612903224) internal successors, (1234), 31 states have internal predecessors, (1234), 0 states have call successors, (0), 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 536 [2022-11-03 03:05:28,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:05:28,500 INFO L225 Difference]: With dead ends: 115966 [2022-11-03 03:05:28,500 INFO L226 Difference]: Without dead ends: 104208 [2022-11-03 03:05:28,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3309 GetRequests, 3180 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4119 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=3109, Invalid=13661, Unknown=0, NotChecked=0, Total=16770 [2022-11-03 03:05:28,519 INFO L413 NwaCegarLoop]: 965 mSDtfsCounter, 7250 mSDsluCounter, 13702 mSDsCounter, 0 mSdLazyCounter, 1840 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7250 SdHoareTripleChecker+Valid, 14667 SdHoareTripleChecker+Invalid, 3583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1692 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:05:28,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7250 Valid, 14667 Invalid, 3583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1840 Invalid, 0 Unknown, 1692 Unchecked, 2.7s Time] [2022-11-03 03:05:28,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104208 states. [2022-11-03 03:05:29,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104208 to 14101. [2022-11-03 03:05:29,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14101 states, 14100 states have (on average 1.343191489361702) internal successors, (18939), 14100 states have internal predecessors, (18939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:05:29,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14101 states to 14101 states and 18939 transitions. [2022-11-03 03:05:29,306 INFO L78 Accepts]: Start accepts. Automaton has 14101 states and 18939 transitions. Word has length 536 [2022-11-03 03:05:29,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:05:29,307 INFO L495 AbstractCegarLoop]: Abstraction has 14101 states and 18939 transitions. [2022-11-03 03:05:29,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 39.806451612903224) internal successors, (1234), 31 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:05:29,307 INFO L276 IsEmpty]: Start isEmpty. Operand 14101 states and 18939 transitions. [2022-11-03 03:05:29,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-11-03 03:05:29,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:05:29,327 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:05:29,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (152)] Forceful destruction successful, exit code 0 [2022-11-03 03:05:29,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-11-03 03:05:29,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (153)] Ended with exit code 0 [2022-11-03 03:05:29,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:05:29,953 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:05:29,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:05:29,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1113221851, now seen corresponding path program 1 times [2022-11-03 03:05:29,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:05:29,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475105326] [2022-11-03 03:05:29,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:05:29,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:05:29,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:05:29,958 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:05:29,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (155)] Waiting until timeout for monitored process [2022-11-03 03:05:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:05:31,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:05:31,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:05:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 94 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-03 03:05:32,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:05:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 94 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-03 03:05:33,377 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:05:33,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475105326] [2022-11-03 03:05:33,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475105326] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:05:33,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [744063412] [2022-11-03 03:05:33,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:05:33,378 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:05:33,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:05:33,379 INFO L229 MonitoredProcess]: Starting monitored process 156 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:05:33,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (156)] Waiting until timeout for monitored process [2022-11-03 03:05:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:05:35,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:05:35,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:05:35,384 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 393 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-03 03:05:35,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:05:35,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [744063412] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:05:35,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:05:35,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 17 [2022-11-03 03:05:35,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898691717] [2022-11-03 03:05:35,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:05:35,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:05:35,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:05:35,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:05:35,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:05:35,387 INFO L87 Difference]: Start difference. First operand 14101 states and 18939 transitions. Second operand has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:05:35,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:05:35,961 INFO L93 Difference]: Finished difference Result 58538 states and 78682 transitions. [2022-11-03 03:05:35,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:05:35,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 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 536 [2022-11-03 03:05:35,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:05:35,991 INFO L225 Difference]: With dead ends: 58538 [2022-11-03 03:05:35,991 INFO L226 Difference]: Without dead ends: 44671 [2022-11-03 03:05:36,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1611 GetRequests, 1593 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:05:36,002 INFO L413 NwaCegarLoop]: 856 mSDtfsCounter, 823 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 1967 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:05:36,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [823 Valid, 1967 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:05:36,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44671 states. [2022-11-03 03:05:36,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44671 to 17445. [2022-11-03 03:05:36,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17445 states, 17444 states have (on average 1.3430979133226324) internal successors, (23429), 17444 states have internal predecessors, (23429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:05:36,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17445 states to 17445 states and 23429 transitions. [2022-11-03 03:05:36,306 INFO L78 Accepts]: Start accepts. Automaton has 17445 states and 23429 transitions. Word has length 536 [2022-11-03 03:05:36,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:05:36,306 INFO L495 AbstractCegarLoop]: Abstraction has 17445 states and 23429 transitions. [2022-11-03 03:05:36,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:05:36,307 INFO L276 IsEmpty]: Start isEmpty. Operand 17445 states and 23429 transitions. [2022-11-03 03:05:36,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-11-03 03:05:36,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:05:36,319 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:05:36,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (156)] Ended with exit code 0 [2022-11-03 03:05:36,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (155)] Ended with exit code 0 [2022-11-03 03:05:36,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,155 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:05:36,720 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:05:36,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:05:36,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1438648091, now seen corresponding path program 1 times [2022-11-03 03:05:36,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:05:36,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272021808] [2022-11-03 03:05:36,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:05:36,723 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:05:36,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:05:36,724 INFO L229 MonitoredProcess]: Starting monitored process 157 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:05:36,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (157)] Waiting until timeout for monitored process [2022-11-03 03:05:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:05:37,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:05:37,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:05:39,116 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 94 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-03 03:05:39,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:05:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 94 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-03 03:05:39,797 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:05:39,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272021808] [2022-11-03 03:05:39,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272021808] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:05:39,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [177251436] [2022-11-03 03:05:39,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:05:39,798 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:05:39,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:05:39,799 INFO L229 MonitoredProcess]: Starting monitored process 158 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:05:39,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (158)] Waiting until timeout for monitored process [2022-11-03 03:05:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:05:42,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:05:42,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:05:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 63 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-11-03 03:05:44,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:05:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 63 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-11-03 03:05:45,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [177251436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:05:45,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644621352] [2022-11-03 03:05:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:05:45,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:05:45,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:05:45,959 INFO L229 MonitoredProcess]: Starting monitored process 159 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:05:45,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e6f6bd-ea54-4a0f-b1be-4291f0d29f08/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-11-03 03:05:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:05:46,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:05:46,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:05:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 39 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-11-03 03:05:48,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:05:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 358 proven. 39 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-11-03 03:05:49,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644621352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:05:49,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:05:49,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11, 11, 8, 8] total 38 [2022-11-03 03:05:49,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157961469] [2022-11-03 03:05:49,915 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:05:49,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 03:05:49,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:05:49,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 03:05:49,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 03:05:49,918 INFO L87 Difference]: Start difference. First operand 17445 states and 23429 transitions. Second operand has 38 states, 38 states have (on average 43.76315789473684) internal successors, (1663), 38 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)