./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p08.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/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_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p08.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/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_3d14e531-6b40-4fec-93df-e172efd0db2d/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 0ba8aabceec0e9fbb56cd96c96ca9543ed2c6a555966d7008b0b602e9c5d8437 --- 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 02:32:55,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:32:55,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:32:55,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:32:55,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:32:55,783 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:32:55,786 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:32:55,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:32:55,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:32:55,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:32:55,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:32:55,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:32:55,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:32:55,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:32:55,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:32:55,801 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:32:55,803 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:32:55,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:32:55,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:32:55,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:32:55,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:32:55,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:32:55,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:32:55,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:32:55,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:32:55,837 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:32:55,837 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:32:55,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:32:55,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:32:55,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:32:55,842 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:32:55,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:32:55,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:32:55,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:32:55,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:32:55,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:32:55,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:32:55,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:32:55,851 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:32:55,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:32:55,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:32:55,854 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:32:55,897 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:32:55,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:32:55,899 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:32:55,899 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:32:55,900 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:32:55,900 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:32:55,900 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:32:55,900 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:32:55,901 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:32:55,901 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:32:55,902 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:32:55,902 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:32:55,902 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:32:55,903 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:32:55,903 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:32:55,903 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:32:55,903 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:32:55,904 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:32:55,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:32:55,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:32:55,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:32:55,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:32:55,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:32:55,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:32:55,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:32:55,906 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:32:55,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:32:55,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:32:55,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:32:55,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:32:55,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:32:55,907 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:32:55,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:32:55,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:32:55,908 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:32:55,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:32:55,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:32:55,908 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:32:55,908 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_3d14e531-6b40-4fec-93df-e172efd0db2d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ba8aabceec0e9fbb56cd96c96ca9543ed2c6a555966d7008b0b602e9c5d8437 [2022-11-03 02:32:56,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:32:56,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:32:56,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:32:56,274 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:32:56,275 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:32:56,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p08.c [2022-11-03 02:32:56,362 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/data/309cc06aa/e7ad4c74f9ec4b79907471141a8ead14/FLAGfbb4f5b1c [2022-11-03 02:32:56,896 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:32:56,896 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p08.c [2022-11-03 02:32:56,906 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/data/309cc06aa/e7ad4c74f9ec4b79907471141a8ead14/FLAGfbb4f5b1c [2022-11-03 02:32:57,277 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/data/309cc06aa/e7ad4c74f9ec4b79907471141a8ead14 [2022-11-03 02:32:57,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:32:57,281 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:32:57,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:32:57,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:32:57,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:32:57,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:32:57" (1/1) ... [2022-11-03 02:32:57,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b935022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:57, skipping insertion in model container [2022-11-03 02:32:57,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:32:57" (1/1) ... [2022-11-03 02:32:57,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:32:57,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:32:57,532 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_3d14e531-6b40-4fec-93df-e172efd0db2d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p08.c[1107,1120] [2022-11-03 02:32:57,601 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:32:57,605 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:32:57,617 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_3d14e531-6b40-4fec-93df-e172efd0db2d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p08.c[1107,1120] [2022-11-03 02:32:57,656 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:32:57,669 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:32:57,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:57 WrapperNode [2022-11-03 02:32:57,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:32:57,671 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:32:57,672 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:32:57,672 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:32:57,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:57" (1/1) ... [2022-11-03 02:32:57,690 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:57" (1/1) ... [2022-11-03 02:32:57,729 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 295 [2022-11-03 02:32:57,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:32:57,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:32:57,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:32:57,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:32:57,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:57" (1/1) ... [2022-11-03 02:32:57,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:57" (1/1) ... [2022-11-03 02:32:57,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:57" (1/1) ... [2022-11-03 02:32:57,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:57" (1/1) ... [2022-11-03 02:32:57,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:57" (1/1) ... [2022-11-03 02:32:57,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:57" (1/1) ... [2022-11-03 02:32:57,765 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:57" (1/1) ... [2022-11-03 02:32:57,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:57" (1/1) ... [2022-11-03 02:32:57,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:32:57,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:32:57,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:32:57,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:32:57,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:57" (1/1) ... [2022-11-03 02:32:57,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:32:57,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:32:57,832 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:32:57,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:32:57,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:32:57,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:32:58,029 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:32:58,031 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:32:58,671 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:32:59,024 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:32:59,025 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:32:59,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:32:59 BoogieIcfgContainer [2022-11-03 02:32:59,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:32:59,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:32:59,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:32:59,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:32:59,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:32:57" (1/3) ... [2022-11-03 02:32:59,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@227aa22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:32:59, skipping insertion in model container [2022-11-03 02:32:59,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:57" (2/3) ... [2022-11-03 02:32:59,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@227aa22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:32:59, skipping insertion in model container [2022-11-03 02:32:59,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:32:59" (3/3) ... [2022-11-03 02:32:59,040 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p08.c [2022-11-03 02:32:59,064 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:32:59,064 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:32:59,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:32:59,156 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;@572840b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:32:59,157 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:32:59,167 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 02:32:59,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:32:59,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:59,174 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:32:59,175 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:59,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:59,183 INFO L85 PathProgramCache]: Analyzing trace with hash 4746797, now seen corresponding path program 1 times [2022-11-03 02:32:59,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:32:59,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109542451] [2022-11-03 02:32:59,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:59,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:32:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:32:59,577 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:32:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:32:59,751 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:32:59,753 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:32:59,754 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:32:59,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:32:59,761 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:32:59,765 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:32:59,803 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:32:59,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:32:59 BoogieIcfgContainer [2022-11-03 02:32:59,819 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:32:59,821 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:32:59,821 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:32:59,822 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:32:59,823 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:32:59" (3/4) ... [2022-11-03 02:32:59,827 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:32:59,828 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:32:59,830 INFO L158 Benchmark]: Toolchain (without parser) took 2548.85ms. Allocated memory is still 123.7MB. Free memory was 88.3MB in the beginning and 78.3MB in the end (delta: 10.0MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. [2022-11-03 02:32:59,831 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 123.7MB. Free memory is still 105.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:32:59,832 INFO L158 Benchmark]: CACSL2BoogieTranslator took 385.23ms. Allocated memory is still 123.7MB. Free memory was 88.1MB in the beginning and 96.3MB in the end (delta: -8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:32:59,834 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.05ms. Allocated memory is still 123.7MB. Free memory was 96.3MB in the beginning and 92.6MB in the end (delta: 3.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 02:32:59,835 INFO L158 Benchmark]: Boogie Preprocessor took 42.44ms. Allocated memory is still 123.7MB. Free memory was 92.6MB in the beginning and 90.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:32:59,841 INFO L158 Benchmark]: RCFGBuilder took 1255.17ms. Allocated memory is still 123.7MB. Free memory was 90.5MB in the beginning and 68.1MB in the end (delta: 22.4MB). Peak memory consumption was 46.1MB. Max. memory is 16.1GB. [2022-11-03 02:32:59,841 INFO L158 Benchmark]: TraceAbstraction took 787.13ms. Allocated memory is still 123.7MB. Free memory was 67.0MB in the beginning and 78.7MB in the end (delta: -11.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:32:59,843 INFO L158 Benchmark]: Witness Printer took 7.68ms. Allocated memory is still 123.7MB. Free memory was 78.7MB in the beginning and 78.3MB in the end (delta: 393.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:32:59,852 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 123.7MB. Free memory is still 105.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 385.23ms. Allocated memory is still 123.7MB. Free memory was 88.1MB in the beginning and 96.3MB in the end (delta: -8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 58.05ms. Allocated memory is still 123.7MB. Free memory was 96.3MB in the beginning and 92.6MB in the end (delta: 3.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.44ms. Allocated memory is still 123.7MB. Free memory was 92.6MB in the beginning and 90.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1255.17ms. Allocated memory is still 123.7MB. Free memory was 90.5MB in the beginning and 68.1MB in the end (delta: 22.4MB). Peak memory consumption was 46.1MB. Max. memory is 16.1GB. * TraceAbstraction took 787.13ms. Allocated memory is still 123.7MB. Free memory was 67.0MB in the beginning and 78.7MB in the end (delta: -11.8MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 7.68ms. Allocated memory is still 123.7MB. Free memory was 78.7MB in the beginning and 78.3MB in the end (delta: 393.4kB). 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 137, overapproximation of bitwiseOr at line 135, overapproximation of bitwiseAnd at line 122. 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 - 8); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (8 - 1); [L31] const SORT_10 mask_SORT_10 = (SORT_10)-1 >> (sizeof(SORT_10) * 8 - 32); [L32] const SORT_10 msb_SORT_10 = (SORT_10)1 << (32 - 1); [L34] const SORT_31 mask_SORT_31 = (SORT_31)-1 >> (sizeof(SORT_31) * 8 - 4); [L35] const SORT_31 msb_SORT_31 = (SORT_31)1 << (4 - 1); [L37] const SORT_67 mask_SORT_67 = (SORT_67)-1 >> (sizeof(SORT_67) * 8 - 10); [L38] const SORT_67 msb_SORT_67 = (SORT_67)1 << (10 - 1); [L40] const SORT_1 var_7 = 0; [L41] const SORT_10 var_12 = 0; [L42] const SORT_1 var_21 = 1; [L44] SORT_1 input_2; [L45] SORT_3 input_4; [L46] SORT_1 input_5; [L47] SORT_1 input_6; [L48] SORT_1 input_29; [L49] SORT_31 input_32; [L50] SORT_31 input_34; [L51] SORT_1 input_36; [L52] SORT_1 input_38; [L53] SORT_1 input_42; [L54] SORT_1 input_44; [L55] SORT_1 input_46; [L56] SORT_1 input_48; [L57] SORT_3 input_50; [L58] SORT_1 input_53; [L59] SORT_1 input_55; [L60] SORT_1 input_59; [L61] SORT_1 input_63; [L62] SORT_1 input_65; [L63] SORT_67 input_68; [L64] SORT_1 input_70; [L65] SORT_1 input_72; [L66] SORT_1 input_78; [L67] SORT_1 input_85; [L68] SORT_1 input_91; [L70] SORT_1 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L71] SORT_1 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L72] SORT_1 state_25 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L73] SORT_1 state_27 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L74] SORT_1 state_40 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L75] SORT_1 state_57 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L76] SORT_1 state_61 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L78] SORT_1 init_9_arg_1 = var_7; [L79] state_8 = init_9_arg_1 [L80] SORT_1 init_15_arg_1 = var_7; [L81] state_14 = init_15_arg_1 [L82] SORT_1 init_26_arg_1 = var_7; [L83] state_25 = init_26_arg_1 [L84] SORT_1 init_28_arg_1 = var_7; [L85] state_27 = init_28_arg_1 [L86] SORT_1 init_41_arg_1 = var_7; [L87] state_40 = init_41_arg_1 [L88] SORT_1 init_58_arg_1 = var_7; [L89] state_57 = init_58_arg_1 [L90] SORT_1 init_62_arg_1 = var_7; [L91] state_61 = init_62_arg_1 VAL [init_15_arg_1=0, init_26_arg_1=0, init_28_arg_1=0, init_41_arg_1=0, init_58_arg_1=0, init_62_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_10=4294967295, mask_SORT_3=255, mask_SORT_31=15, mask_SORT_67=1023, msb_SORT_1=1, msb_SORT_10=2147483648, msb_SORT_3=128, msb_SORT_31=8, msb_SORT_67=512, state_14=0, state_25=0, state_27=0, state_40=0, state_57=0, state_61=0, state_8=0, var_12=0, var_21=1, var_7=0] [L94] input_2 = __VERIFIER_nondet_uchar() [L95] input_4 = __VERIFIER_nondet_uchar() [L96] input_5 = __VERIFIER_nondet_uchar() [L97] input_6 = __VERIFIER_nondet_uchar() [L98] input_29 = __VERIFIER_nondet_uchar() [L99] input_32 = __VERIFIER_nondet_uchar() [L100] input_34 = __VERIFIER_nondet_uchar() [L101] input_36 = __VERIFIER_nondet_uchar() [L102] input_38 = __VERIFIER_nondet_uchar() [L103] input_42 = __VERIFIER_nondet_uchar() [L104] input_44 = __VERIFIER_nondet_uchar() [L105] input_46 = __VERIFIER_nondet_uchar() [L106] input_48 = __VERIFIER_nondet_uchar() [L107] input_50 = __VERIFIER_nondet_uchar() [L108] input_53 = __VERIFIER_nondet_uchar() [L109] input_55 = __VERIFIER_nondet_uchar() [L110] input_59 = __VERIFIER_nondet_uchar() [L111] input_63 = __VERIFIER_nondet_uchar() [L112] input_65 = __VERIFIER_nondet_uchar() [L113] input_68 = __VERIFIER_nondet_ushort() [L114] input_70 = __VERIFIER_nondet_uchar() [L115] input_72 = __VERIFIER_nondet_uchar() [L116] input_78 = __VERIFIER_nondet_uchar() [L117] input_85 = __VERIFIER_nondet_uchar() [L118] input_91 = __VERIFIER_nondet_uchar() [L121] SORT_1 var_11_arg_0 = state_8; [L122] var_11_arg_0 = var_11_arg_0 & mask_SORT_1 [L123] SORT_10 var_11 = var_11_arg_0; [L124] SORT_10 var_13_arg_0 = var_11; [L125] SORT_10 var_13_arg_1 = var_12; [L126] SORT_1 var_13 = var_13_arg_0 == var_13_arg_1; [L127] SORT_1 var_16_arg_0 = state_14; [L128] var_16_arg_0 = var_16_arg_0 & mask_SORT_1 [L129] SORT_10 var_16 = var_16_arg_0; [L130] SORT_10 var_17_arg_0 = var_16; [L131] SORT_10 var_17_arg_1 = var_12; [L132] SORT_1 var_17 = var_17_arg_0 == var_17_arg_1; [L133] SORT_1 var_18_arg_0 = var_13; [L134] SORT_1 var_18_arg_1 = var_17; [L135] SORT_1 var_18 = var_18_arg_0 | var_18_arg_1; [L136] SORT_1 var_22_arg_0 = var_18; [L137] SORT_1 var_22 = ~var_22_arg_0; [L138] SORT_1 var_23_arg_0 = var_21; [L139] SORT_1 var_23_arg_1 = var_22; [L140] SORT_1 var_23 = var_23_arg_0 & var_23_arg_1; [L141] var_23 = var_23 & mask_SORT_1 [L142] SORT_1 bad_24_arg_0 = var_23; [L143] CALL __VERIFIER_assert(!(bad_24_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:32:59,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/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_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p08.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/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_3d14e531-6b40-4fec-93df-e172efd0db2d/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 0ba8aabceec0e9fbb56cd96c96ca9543ed2c6a555966d7008b0b602e9c5d8437 --- 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 02:33:02,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:33:02,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:33:02,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:33:02,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:33:02,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:33:02,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:33:02,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:33:02,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:33:02,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:33:02,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:33:02,610 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:33:02,610 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:33:02,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:33:02,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:33:02,614 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:33:02,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:33:02,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:33:02,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:33:02,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:33:02,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:33:02,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:33:02,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:33:02,643 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:33:02,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:33:02,648 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:33:02,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:33:02,649 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:33:02,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:33:02,651 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:33:02,651 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:33:02,652 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:33:02,653 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:33:02,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:33:02,660 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:33:02,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:33:02,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:33:02,662 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:33:02,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:33:02,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:33:02,665 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:33:02,667 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:33:02,708 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:33:02,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:33:02,709 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:33:02,709 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:33:02,710 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:33:02,710 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:33:02,711 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:33:02,711 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:33:02,711 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:33:02,711 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:33:02,712 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:33:02,712 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:33:02,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:33:02,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:33:02,714 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:33:02,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:33:02,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:33:02,714 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:33:02,715 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:33:02,715 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:33:02,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:33:02,715 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:33:02,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:33:02,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:33:02,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:33:02,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:33:02,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:33:02,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:33:02,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:33:02,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:33:02,718 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:33:02,718 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:33:02,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:33:02,718 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:33:02,719 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:33:02,719 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_3d14e531-6b40-4fec-93df-e172efd0db2d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ba8aabceec0e9fbb56cd96c96ca9543ed2c6a555966d7008b0b602e9c5d8437 [2022-11-03 02:33:03,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:33:03,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:33:03,232 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:33:03,233 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:33:03,235 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:33:03,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p08.c [2022-11-03 02:33:03,330 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/data/390944941/1f99760eaecb44a38318993b46c8ff31/FLAGe174a9669 [2022-11-03 02:33:04,035 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:33:04,037 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p08.c [2022-11-03 02:33:04,049 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/data/390944941/1f99760eaecb44a38318993b46c8ff31/FLAGe174a9669 [2022-11-03 02:33:04,335 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/data/390944941/1f99760eaecb44a38318993b46c8ff31 [2022-11-03 02:33:04,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:33:04,351 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:33:04,356 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:33:04,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:33:04,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:33:04,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:33:04" (1/1) ... [2022-11-03 02:33:04,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6643b806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:04, skipping insertion in model container [2022-11-03 02:33:04,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:33:04" (1/1) ... [2022-11-03 02:33:04,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:33:04,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:33:04,658 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_3d14e531-6b40-4fec-93df-e172efd0db2d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p08.c[1107,1120] [2022-11-03 02:33:04,762 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:33:04,773 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:33:04,785 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_3d14e531-6b40-4fec-93df-e172efd0db2d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p08.c[1107,1120] [2022-11-03 02:33:04,842 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:33:04,861 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:33:04,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:04 WrapperNode [2022-11-03 02:33:04,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:33:04,867 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:33:04,867 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:33:04,867 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:33:04,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:04" (1/1) ... [2022-11-03 02:33:04,885 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:04" (1/1) ... [2022-11-03 02:33:04,919 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 295 [2022-11-03 02:33:04,920 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:33:04,921 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:33:04,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:33:04,921 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:33:04,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:04" (1/1) ... [2022-11-03 02:33:04,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:04" (1/1) ... [2022-11-03 02:33:04,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:04" (1/1) ... [2022-11-03 02:33:04,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:04" (1/1) ... [2022-11-03 02:33:04,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:04" (1/1) ... [2022-11-03 02:33:04,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:04" (1/1) ... [2022-11-03 02:33:04,953 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:04" (1/1) ... [2022-11-03 02:33:04,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:04" (1/1) ... [2022-11-03 02:33:04,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:33:04,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:33:04,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:33:04,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:33:04,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:04" (1/1) ... [2022-11-03 02:33:04,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:33:04,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:04,993 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:33:05,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:33:05,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:33:05,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:33:05,192 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:33:05,205 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:33:05,762 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:33:05,776 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:33:05,780 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:33:05,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:33:05 BoogieIcfgContainer [2022-11-03 02:33:05,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:33:05,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:33:05,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:33:05,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:33:05,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:33:04" (1/3) ... [2022-11-03 02:33:05,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5632df1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:33:05, skipping insertion in model container [2022-11-03 02:33:05,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:04" (2/3) ... [2022-11-03 02:33:05,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5632df1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:33:05, skipping insertion in model container [2022-11-03 02:33:05,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:33:05" (3/3) ... [2022-11-03 02:33:05,795 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p08.c [2022-11-03 02:33:05,820 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:33:05,821 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:33:05,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:33:05,918 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;@6a28159b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:33:05,919 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:33:05,924 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 38 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:05,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:33:05,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:05,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:33:05,933 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:05,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:05,940 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 02:33:05,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:05,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548659113] [2022-11-03 02:33:05,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:05,956 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:05,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:05,958 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:05,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:33:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:06,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:33:06,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:06,370 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 02:33:06,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:06,372 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:06,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548659113] [2022-11-03 02:33:06,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548659113] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:06,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:06,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:33:06,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666320073] [2022-11-03 02:33:06,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:06,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:33:06,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:06,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:33:06,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:33:06,434 INFO L87 Difference]: Start difference. First operand has 39 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 38 states have internal predecessors, (55), 0 states have call successors, (0), 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 02:33:06,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:06,582 INFO L93 Difference]: Finished difference Result 104 states and 156 transitions. [2022-11-03 02:33:06,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:33:06,587 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 02:33:06,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:06,597 INFO L225 Difference]: With dead ends: 104 [2022-11-03 02:33:06,597 INFO L226 Difference]: Without dead ends: 67 [2022-11-03 02:33:06,601 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 02:33:06,608 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 87 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:06,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 129 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:33:06,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-03 02:33:06,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 37. [2022-11-03 02:33:06,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:06,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2022-11-03 02:33:06,649 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 5 [2022-11-03 02:33:06,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:06,649 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2022-11-03 02:33:06,650 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 02:33:06,650 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2022-11-03 02:33:06,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:33:06,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:06,651 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] [2022-11-03 02:33:06,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-03 02:33:06,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:06,855 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:06,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:06,856 INFO L85 PathProgramCache]: Analyzing trace with hash 129006159, now seen corresponding path program 1 times [2022-11-03 02:33:06,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:06,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751370413] [2022-11-03 02:33:06,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:06,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:06,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:06,860 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:06,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:33:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:07,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:33:07,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:07,114 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 02:33:07,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:07,115 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:07,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751370413] [2022-11-03 02:33:07,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751370413] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:07,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:07,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:33:07,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465647572] [2022-11-03 02:33:07,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:07,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:33:07,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:07,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:33:07,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:33:07,119 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:07,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:07,165 INFO L93 Difference]: Finished difference Result 131 states and 186 transitions. [2022-11-03 02:33:07,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:33:07,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 02:33:07,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:07,168 INFO L225 Difference]: With dead ends: 131 [2022-11-03 02:33:07,168 INFO L226 Difference]: Without dead ends: 98 [2022-11-03 02:33:07,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 02:33:07,170 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 126 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:07,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 174 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:33:07,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-03 02:33:07,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 39. [2022-11-03 02:33:07,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:07,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2022-11-03 02:33:07,179 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 36 [2022-11-03 02:33:07,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:07,180 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2022-11-03 02:33:07,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:07,181 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2022-11-03 02:33:07,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:33:07,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:07,182 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] [2022-11-03 02:33:07,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:07,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:07,402 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:07,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:07,403 INFO L85 PathProgramCache]: Analyzing trace with hash 830606033, now seen corresponding path program 1 times [2022-11-03 02:33:07,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:07,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [305743523] [2022-11-03 02:33:07,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:07,405 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:07,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:07,406 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:07,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:33:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:07,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:33:07,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:07,704 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 02:33:07,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:07,705 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:07,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [305743523] [2022-11-03 02:33:07,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [305743523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:07,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:07,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:33:07,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590466268] [2022-11-03 02:33:07,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:07,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:33:07,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:07,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:33:07,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:33:07,710 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:07,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:07,857 INFO L93 Difference]: Finished difference Result 106 states and 148 transitions. [2022-11-03 02:33:07,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:33:07,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 02:33:07,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:07,864 INFO L225 Difference]: With dead ends: 106 [2022-11-03 02:33:07,864 INFO L226 Difference]: Without dead ends: 73 [2022-11-03 02:33:07,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 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 02:33:07,871 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 128 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:07,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 171 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:33:07,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-03 02:33:07,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 41. [2022-11-03 02:33:07,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:07,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2022-11-03 02:33:07,891 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 36 [2022-11-03 02:33:07,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:07,892 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2022-11-03 02:33:07,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:07,893 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2022-11-03 02:33:07,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:33:07,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:07,895 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] [2022-11-03 02:33:07,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:08,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:08,118 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:08,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:08,123 INFO L85 PathProgramCache]: Analyzing trace with hash -555597361, now seen corresponding path program 1 times [2022-11-03 02:33:08,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:08,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465779028] [2022-11-03 02:33:08,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:08,125 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:08,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:08,129 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:08,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:33:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:08,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:33:08,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:08,359 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 02:33:08,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:08,359 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:08,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465779028] [2022-11-03 02:33:08,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465779028] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:08,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:08,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:33:08,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370871383] [2022-11-03 02:33:08,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:08,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:33:08,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:08,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:33:08,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:33:08,368 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:08,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:08,437 INFO L93 Difference]: Finished difference Result 131 states and 184 transitions. [2022-11-03 02:33:08,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:33:08,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 02:33:08,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:08,439 INFO L225 Difference]: With dead ends: 131 [2022-11-03 02:33:08,439 INFO L226 Difference]: Without dead ends: 98 [2022-11-03 02:33:08,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 02:33:08,449 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 114 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:08,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 163 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:33:08,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-03 02:33:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 43. [2022-11-03 02:33:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:08,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2022-11-03 02:33:08,470 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 36 [2022-11-03 02:33:08,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:08,472 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2022-11-03 02:33:08,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:08,472 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2022-11-03 02:33:08,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:33:08,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:08,474 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] [2022-11-03 02:33:08,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:08,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:08,691 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:08,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:08,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1367630673, now seen corresponding path program 1 times [2022-11-03 02:33:08,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:08,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528782588] [2022-11-03 02:33:08,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:08,693 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:08,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:08,694 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:08,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:33:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:08,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:33:08,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:08,920 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 02:33:08,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:08,921 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:08,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528782588] [2022-11-03 02:33:08,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528782588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:08,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:08,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:33:08,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586880868] [2022-11-03 02:33:08,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:08,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:33:08,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:08,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:33:08,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:33:08,924 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:08,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:08,983 INFO L93 Difference]: Finished difference Result 131 states and 183 transitions. [2022-11-03 02:33:08,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:33:08,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 02:33:08,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:08,985 INFO L225 Difference]: With dead ends: 131 [2022-11-03 02:33:08,985 INFO L226 Difference]: Without dead ends: 98 [2022-11-03 02:33:08,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 02:33:08,986 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 103 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:08,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 162 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:33:08,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-03 02:33:08,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 47. [2022-11-03 02:33:08,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 46 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:08,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2022-11-03 02:33:08,993 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 36 [2022-11-03 02:33:08,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:08,993 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2022-11-03 02:33:08,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:08,994 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2022-11-03 02:33:08,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:33:09,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:09,001 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] [2022-11-03 02:33:09,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-11-03 02:33:09,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:09,222 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:09,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:09,223 INFO L85 PathProgramCache]: Analyzing trace with hash -437807661, now seen corresponding path program 1 times [2022-11-03 02:33:09,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:09,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32334817] [2022-11-03 02:33:09,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:09,223 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:09,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:09,224 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:09,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:33:09,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:09,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:33:09,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:09,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:09,425 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:09,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32334817] [2022-11-03 02:33:09,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32334817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:09,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:09,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:33:09,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265943728] [2022-11-03 02:33:09,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:09,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:33:09,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:09,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:33:09,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:33:09,428 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:09,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:09,457 INFO L93 Difference]: Finished difference Result 131 states and 182 transitions. [2022-11-03 02:33:09,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:33:09,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 02:33:09,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:09,459 INFO L225 Difference]: With dead ends: 131 [2022-11-03 02:33:09,459 INFO L226 Difference]: Without dead ends: 98 [2022-11-03 02:33:09,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 02:33:09,460 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 97 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:09,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 173 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:33:09,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-03 02:33:09,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 49. [2022-11-03 02:33:09,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 48 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:09,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2022-11-03 02:33:09,467 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 36 [2022-11-03 02:33:09,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:09,467 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2022-11-03 02:33:09,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:09,468 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2022-11-03 02:33:09,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:33:09,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:09,469 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] [2022-11-03 02:33:09,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:09,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:09,683 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:09,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:09,684 INFO L85 PathProgramCache]: Analyzing trace with hash -15105835, now seen corresponding path program 1 times [2022-11-03 02:33:09,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:09,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990315497] [2022-11-03 02:33:09,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:09,686 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:09,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:09,687 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:09,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:33:09,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:09,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:33:09,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:09,899 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 02:33:09,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:09,901 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:09,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990315497] [2022-11-03 02:33:09,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990315497] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:09,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:09,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:33:09,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678489074] [2022-11-03 02:33:09,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:09,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:33:09,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:09,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:33:09,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:33:09,904 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:09,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:09,937 INFO L93 Difference]: Finished difference Result 131 states and 181 transitions. [2022-11-03 02:33:09,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:33:09,939 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 02:33:09,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:09,942 INFO L225 Difference]: With dead ends: 131 [2022-11-03 02:33:09,942 INFO L226 Difference]: Without dead ends: 98 [2022-11-03 02:33:09,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 02:33:09,946 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 91 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:09,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 172 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:33:09,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-03 02:33:09,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 51. [2022-11-03 02:33:09,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.32) internal successors, (66), 50 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:09,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2022-11-03 02:33:09,962 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 36 [2022-11-03 02:33:09,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:09,963 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2022-11-03 02:33:09,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:09,963 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2022-11-03 02:33:09,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:33:09,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:09,973 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] [2022-11-03 02:33:10,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:10,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:10,201 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:10,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:10,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1704049577, now seen corresponding path program 1 times [2022-11-03 02:33:10,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:10,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973701061] [2022-11-03 02:33:10,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:10,202 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:10,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:10,203 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:10,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:33:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:10,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:33:10,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:10,424 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 02:33:10,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:10,424 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:10,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973701061] [2022-11-03 02:33:10,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973701061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:10,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:10,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:33:10,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276793774] [2022-11-03 02:33:10,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:10,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:33:10,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:10,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:33:10,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:33:10,427 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:10,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:10,463 INFO L93 Difference]: Finished difference Result 131 states and 180 transitions. [2022-11-03 02:33:10,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:33:10,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 02:33:10,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:10,465 INFO L225 Difference]: With dead ends: 131 [2022-11-03 02:33:10,465 INFO L226 Difference]: Without dead ends: 98 [2022-11-03 02:33:10,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 02:33:10,466 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 75 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:10,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 168 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:33:10,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-03 02:33:10,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 57. [2022-11-03 02:33:10,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 56 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:10,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2022-11-03 02:33:10,477 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 36 [2022-11-03 02:33:10,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:10,478 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2022-11-03 02:33:10,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:10,478 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2022-11-03 02:33:10,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:33:10,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:10,479 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] [2022-11-03 02:33:10,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:10,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:10,694 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:10,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:10,695 INFO L85 PathProgramCache]: Analyzing trace with hash 2004111705, now seen corresponding path program 1 times [2022-11-03 02:33:10,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:10,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525313553] [2022-11-03 02:33:10,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:10,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:10,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:10,698 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:10,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:33:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:10,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:33:10,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:10,930 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 02:33:10,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:10,930 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:10,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [525313553] [2022-11-03 02:33:10,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [525313553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:10,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:10,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:33:10,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506256192] [2022-11-03 02:33:10,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:10,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:33:10,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:10,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:33:10,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:33:10,933 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:10,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:10,990 INFO L93 Difference]: Finished difference Result 131 states and 179 transitions. [2022-11-03 02:33:10,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:33:10,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 02:33:10,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:10,992 INFO L225 Difference]: With dead ends: 131 [2022-11-03 02:33:10,992 INFO L226 Difference]: Without dead ends: 98 [2022-11-03 02:33:10,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 02:33:10,993 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 64 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:10,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 158 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:33:10,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-03 02:33:10,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2022-11-03 02:33:10,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.3166666666666667) internal successors, (79), 60 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:10,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2022-11-03 02:33:11,000 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 36 [2022-11-03 02:33:11,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:11,000 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2022-11-03 02:33:11,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:11,001 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2022-11-03 02:33:11,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:33:11,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:11,001 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] [2022-11-03 02:33:11,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:11,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:11,216 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:11,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:11,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1610797221, now seen corresponding path program 1 times [2022-11-03 02:33:11,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:11,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032750863] [2022-11-03 02:33:11,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:11,217 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:11,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:11,219 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:11,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:33:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:11,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:33:11,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:11,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:11,437 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:11,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032750863] [2022-11-03 02:33:11,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032750863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:11,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:11,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:33:11,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511378062] [2022-11-03 02:33:11,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:11,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:33:11,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:11,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:33:11,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:33:11,440 INFO L87 Difference]: Start difference. First operand 61 states and 79 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:11,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:11,496 INFO L93 Difference]: Finished difference Result 131 states and 178 transitions. [2022-11-03 02:33:11,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:33:11,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 02:33:11,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:11,498 INFO L225 Difference]: With dead ends: 131 [2022-11-03 02:33:11,498 INFO L226 Difference]: Without dead ends: 98 [2022-11-03 02:33:11,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 02:33:11,500 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 58 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:11,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 169 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:33:11,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-03 02:33:11,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 63. [2022-11-03 02:33:11,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 62 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:11,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2022-11-03 02:33:11,514 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 36 [2022-11-03 02:33:11,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:11,514 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2022-11-03 02:33:11,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:11,515 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2022-11-03 02:33:11,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:33:11,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:11,520 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] [2022-11-03 02:33:11,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:11,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:11,735 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:11,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:11,736 INFO L85 PathProgramCache]: Analyzing trace with hash 164210141, now seen corresponding path program 1 times [2022-11-03 02:33:11,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:11,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459376205] [2022-11-03 02:33:11,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:11,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:11,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:11,742 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:11,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:33:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:11,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:33:11,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:11,974 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 02:33:11,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:11,975 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:11,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459376205] [2022-11-03 02:33:11,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459376205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:11,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:11,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:33:11,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646669969] [2022-11-03 02:33:11,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:11,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:33:11,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:11,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:33:11,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:33:11,978 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:12,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:12,023 INFO L93 Difference]: Finished difference Result 131 states and 177 transitions. [2022-11-03 02:33:12,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:33:12,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 02:33:12,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:12,024 INFO L225 Difference]: With dead ends: 131 [2022-11-03 02:33:12,024 INFO L226 Difference]: Without dead ends: 98 [2022-11-03 02:33:12,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 02:33:12,025 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 52 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:12,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 165 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:33:12,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-03 02:33:12,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2022-11-03 02:33:12,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.296875) internal successors, (83), 64 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:12,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 83 transitions. [2022-11-03 02:33:12,033 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 83 transitions. Word has length 36 [2022-11-03 02:33:12,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:12,034 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 83 transitions. [2022-11-03 02:33:12,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:12,034 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 83 transitions. [2022-11-03 02:33:12,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:33:12,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:12,035 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] [2022-11-03 02:33:12,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:12,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:12,248 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:12,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:12,249 INFO L85 PathProgramCache]: Analyzing trace with hash 166057183, now seen corresponding path program 1 times [2022-11-03 02:33:12,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:12,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [831332190] [2022-11-03 02:33:12,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:12,249 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:12,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:12,251 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:12,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:33:12,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:12,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:33:12,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:12,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:12,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:14,393 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:14,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [831332190] [2022-11-03 02:33:14,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [831332190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:14,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [928953976] [2022-11-03 02:33:14,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:14,393 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:33:14,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:33:14,398 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:33:14,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-03 02:33:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:14,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:33:14,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:14,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:14,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:15,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [928953976] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:15,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996919047] [2022-11-03 02:33:15,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:15,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:15,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:15,512 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:15,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:33:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:15,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:33:15,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:15,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:16,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996919047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:16,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:33:16,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 20 [2022-11-03 02:33:16,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631705901] [2022-11-03 02:33:16,672 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:33:16,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:33:16,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:16,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:33:16,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:33:16,675 INFO L87 Difference]: Start difference. First operand 65 states and 83 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:17,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:17,172 INFO L93 Difference]: Finished difference Result 130 states and 170 transitions. [2022-11-03 02:33:17,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:33:17,173 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 36 [2022-11-03 02:33:17,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:17,174 INFO L225 Difference]: With dead ends: 130 [2022-11-03 02:33:17,174 INFO L226 Difference]: Without dead ends: 128 [2022-11-03 02:33:17,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:33:17,176 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 320 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:17,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 375 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 87 Invalid, 0 Unknown, 144 Unchecked, 0.2s Time] [2022-11-03 02:33:17,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-03 02:33:17,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 108. [2022-11-03 02:33:17,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.2990654205607477) internal successors, (139), 107 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:17,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 139 transitions. [2022-11-03 02:33:17,182 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 139 transitions. Word has length 36 [2022-11-03 02:33:17,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:17,182 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 139 transitions. [2022-11-03 02:33:17,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:17,183 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 139 transitions. [2022-11-03 02:33:17,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:33:17,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:17,183 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] [2022-11-03 02:33:17,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:17,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:17,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:17,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:17,785 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:17,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:17,785 INFO L85 PathProgramCache]: Analyzing trace with hash 306605793, now seen corresponding path program 1 times [2022-11-03 02:33:17,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:17,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108076288] [2022-11-03 02:33:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:17,786 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:17,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:17,787 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:17,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:33:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:17,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:33:17,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:17,982 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 02:33:17,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:17,982 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:17,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108076288] [2022-11-03 02:33:17,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108076288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:17,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:17,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:33:17,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2908965] [2022-11-03 02:33:17,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:17,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:33:17,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:17,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:33:17,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:33:17,985 INFO L87 Difference]: Start difference. First operand 108 states and 139 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:18,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:18,046 INFO L93 Difference]: Finished difference Result 174 states and 232 transitions. [2022-11-03 02:33:18,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:33:18,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 02:33:18,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:18,048 INFO L225 Difference]: With dead ends: 174 [2022-11-03 02:33:18,048 INFO L226 Difference]: Without dead ends: 98 [2022-11-03 02:33:18,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 02:33:18,051 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 61 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:18,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 129 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:33:18,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-03 02:33:18,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2022-11-03 02:33:18,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.3218390804597702) internal successors, (115), 87 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:18,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 115 transitions. [2022-11-03 02:33:18,066 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 115 transitions. Word has length 36 [2022-11-03 02:33:18,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:18,067 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 115 transitions. [2022-11-03 02:33:18,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:18,067 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 115 transitions. [2022-11-03 02:33:18,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 02:33:18,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:18,068 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, 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 02:33:18,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:18,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:18,281 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:18,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:18,282 INFO L85 PathProgramCache]: Analyzing trace with hash -189234375, now seen corresponding path program 1 times [2022-11-03 02:33:18,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:18,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521902965] [2022-11-03 02:33:18,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:18,283 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:18,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:18,285 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:18,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:33:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:18,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:33:18,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:18,709 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:18,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:18,846 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:18,847 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:18,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521902965] [2022-11-03 02:33:18,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521902965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:18,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [322899658] [2022-11-03 02:33:18,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:18,848 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:33:18,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:33:18,849 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:33:18,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-03 02:33:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:19,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:33:19,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:33:19,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:19,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [322899658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:19,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:33:19,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 02:33:19,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435438496] [2022-11-03 02:33:19,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:19,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:33:19,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:19,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:33:19,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:33:19,198 INFO L87 Difference]: Start difference. First operand 88 states and 115 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:19,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:19,290 INFO L93 Difference]: Finished difference Result 248 states and 340 transitions. [2022-11-03 02:33:19,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:33:19,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 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 67 [2022-11-03 02:33:19,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:19,292 INFO L225 Difference]: With dead ends: 248 [2022-11-03 02:33:19,292 INFO L226 Difference]: Without dead ends: 182 [2022-11-03 02:33:19,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:33:19,295 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 133 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:19,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 201 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:33:19,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-03 02:33:19,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 106. [2022-11-03 02:33:19,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.3333333333333333) internal successors, (140), 105 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:19,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 140 transitions. [2022-11-03 02:33:19,304 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 140 transitions. Word has length 67 [2022-11-03 02:33:19,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:19,306 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 140 transitions. [2022-11-03 02:33:19,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:19,307 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 140 transitions. [2022-11-03 02:33:19,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 02:33:19,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:19,308 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, 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 02:33:19,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2022-11-03 02:33:19,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-11-03 02:33:19,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:19,711 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:19,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:19,712 INFO L85 PathProgramCache]: Analyzing trace with hash -187387333, now seen corresponding path program 1 times [2022-11-03 02:33:19,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:19,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783290211] [2022-11-03 02:33:19,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:19,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:19,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:19,713 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:19,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:33:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:19,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:33:19,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:20,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:20,269 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:20,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783290211] [2022-11-03 02:33:20,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783290211] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:20,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1919040124] [2022-11-03 02:33:20,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:20,270 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:33:20,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:33:20,272 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:33:20,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-03 02:33:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:20,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:33:20,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:20,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:20,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1919040124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:20,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008603066] [2022-11-03 02:33:20,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:20,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:20,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:20,982 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:20,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 02:33:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:21,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:33:21,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:33:21,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:33:21,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008603066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:21,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:33:21,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 6, 7] total 17 [2022-11-03 02:33:21,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865539524] [2022-11-03 02:33:21,573 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:33:21,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:33:21,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:21,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:33:21,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:33:21,575 INFO L87 Difference]: Start difference. First operand 106 states and 140 transitions. Second operand has 17 states, 17 states have (on average 8.470588235294118) internal successors, (144), 17 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:23,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:23,084 INFO L93 Difference]: Finished difference Result 821 states and 1158 transitions. [2022-11-03 02:33:23,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-03 02:33:23,085 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.470588235294118) internal successors, (144), 17 states have internal predecessors, (144), 0 states have call successors, (0), 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 67 [2022-11-03 02:33:23,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:23,090 INFO L225 Difference]: With dead ends: 821 [2022-11-03 02:33:23,090 INFO L226 Difference]: Without dead ends: 745 [2022-11-03 02:33:23,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 380 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=636, Invalid=1914, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 02:33:23,096 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 1175 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1175 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:23,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1175 Valid, 664 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:33:23,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-11-03 02:33:23,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 184. [2022-11-03 02:33:23,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.366120218579235) internal successors, (250), 183 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:23,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 250 transitions. [2022-11-03 02:33:23,113 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 250 transitions. Word has length 67 [2022-11-03 02:33:23,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:23,113 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 250 transitions. [2022-11-03 02:33:23,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.470588235294118) internal successors, (144), 17 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:23,114 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 250 transitions. [2022-11-03 02:33:23,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 02:33:23,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:23,115 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, 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 02:33:23,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:23,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:23,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:23,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:23,720 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:23,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:23,720 INFO L85 PathProgramCache]: Analyzing trace with hash 654761151, now seen corresponding path program 1 times [2022-11-03 02:33:23,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:23,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1517576642] [2022-11-03 02:33:23,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:23,721 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:23,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:23,722 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:23,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:33:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:23,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:33:23,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:24,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:24,720 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:24,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1517576642] [2022-11-03 02:33:24,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1517576642] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:24,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1689839439] [2022-11-03 02:33:24,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:24,721 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:33:24,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:33:24,723 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:33:24,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-03 02:33:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:24,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:33:24,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:25,131 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:33:25,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:25,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1689839439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:25,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:33:25,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13, 13] total 27 [2022-11-03 02:33:25,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439006478] [2022-11-03 02:33:25,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:25,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:33:25,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:25,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:33:25,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:33:25,135 INFO L87 Difference]: Start difference. First operand 184 states and 250 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:25,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:25,263 INFO L93 Difference]: Finished difference Result 514 states and 716 transitions. [2022-11-03 02:33:25,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:33:25,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 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 67 [2022-11-03 02:33:25,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:25,268 INFO L225 Difference]: With dead ends: 514 [2022-11-03 02:33:25,268 INFO L226 Difference]: Without dead ends: 360 [2022-11-03 02:33:25,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:33:25,270 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 214 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:25,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 171 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:33:25,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-11-03 02:33:25,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 220. [2022-11-03 02:33:25,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.3470319634703196) internal successors, (295), 219 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:25,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 295 transitions. [2022-11-03 02:33:25,284 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 295 transitions. Word has length 67 [2022-11-03 02:33:25,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:25,285 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 295 transitions. [2022-11-03 02:33:25,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:25,286 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 295 transitions. [2022-11-03 02:33:25,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 02:33:25,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:25,287 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:25,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:25,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-11-03 02:33:25,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:25,691 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:25,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:25,691 INFO L85 PathProgramCache]: Analyzing trace with hash 67955137, now seen corresponding path program 1 times [2022-11-03 02:33:25,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:25,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404456031] [2022-11-03 02:33:25,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:25,692 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:25,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:25,693 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:25,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:33:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:25,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:33:25,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:26,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:26,576 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:26,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404456031] [2022-11-03 02:33:26,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404456031] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:26,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1493577504] [2022-11-03 02:33:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:26,577 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:33:26,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:33:26,578 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:33:26,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-03 02:33:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:26,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:33:26,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:27,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:27,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1493577504] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:27,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638399985] [2022-11-03 02:33:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:27,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:27,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:27,691 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:27,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-03 02:33:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:27,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:33:27,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:28,162 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:33:28,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:33:28,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638399985] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:28,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:33:28,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12, 12, 7, 8] total 48 [2022-11-03 02:33:28,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523391233] [2022-11-03 02:33:28,437 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:33:28,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 02:33:28,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:28,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 02:33:28,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2067, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 02:33:28,440 INFO L87 Difference]: Start difference. First operand 220 states and 295 transitions. Second operand has 48 states, 48 states have (on average 4.625) internal successors, (222), 48 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:37,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:37,538 INFO L93 Difference]: Finished difference Result 2903 states and 3954 transitions. [2022-11-03 02:33:37,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-11-03 02:33:37,538 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.625) internal successors, (222), 48 states have internal predecessors, (222), 0 states have call successors, (0), 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 67 [2022-11-03 02:33:37,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:37,546 INFO L225 Difference]: With dead ends: 2903 [2022-11-03 02:33:37,547 INFO L226 Difference]: Without dead ends: 2713 [2022-11-03 02:33:37,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 349 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8078 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=4249, Invalid=23807, Unknown=0, NotChecked=0, Total=28056 [2022-11-03 02:33:37,555 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 3053 mSDsluCounter, 4462 mSDsCounter, 0 mSdLazyCounter, 3360 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3053 SdHoareTripleChecker+Valid, 4679 SdHoareTripleChecker+Invalid, 3729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 3360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:37,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3053 Valid, 4679 Invalid, 3729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 3360 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-03 02:33:37,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2022-11-03 02:33:37,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 358. [2022-11-03 02:33:37,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.3361344537815125) internal successors, (477), 357 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:37,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 477 transitions. [2022-11-03 02:33:37,597 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 477 transitions. Word has length 67 [2022-11-03 02:33:37,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:37,598 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 477 transitions. [2022-11-03 02:33:37,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.625) internal successors, (222), 48 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:37,598 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 477 transitions. [2022-11-03 02:33:37,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 02:33:37,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:37,599 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:37,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-03 02:33:37,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:38,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:38,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:33:38,219 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:38,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:38,219 INFO L85 PathProgramCache]: Analyzing trace with hash 464431167, now seen corresponding path program 1 times [2022-11-03 02:33:38,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:38,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429933282] [2022-11-03 02:33:38,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:38,220 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:38,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:38,222 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:38,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 02:33:38,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:38,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:33:38,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:38,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:38,850 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:38,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429933282] [2022-11-03 02:33:38,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429933282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:38,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1236603013] [2022-11-03 02:33:38,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:38,851 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:33:38,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:33:38,859 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:33:38,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-03 02:33:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:39,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:33:39,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:33:39,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:39,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1236603013] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:39,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:33:39,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 12] total 20 [2022-11-03 02:33:39,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897809493] [2022-11-03 02:33:39,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:39,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:33:39,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:39,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:33:39,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:33:39,163 INFO L87 Difference]: Start difference. First operand 358 states and 477 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:39,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:39,268 INFO L93 Difference]: Finished difference Result 821 states and 1102 transitions. [2022-11-03 02:33:39,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:33:39,274 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-03 02:33:39,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:39,277 INFO L225 Difference]: With dead ends: 821 [2022-11-03 02:33:39,277 INFO L226 Difference]: Without dead ends: 497 [2022-11-03 02:33:39,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:33:39,279 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 180 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:39,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 164 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:33:39,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-11-03 02:33:39,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 358. [2022-11-03 02:33:39,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.319327731092437) internal successors, (471), 357 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:39,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 471 transitions. [2022-11-03 02:33:39,298 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 471 transitions. Word has length 67 [2022-11-03 02:33:39,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:39,298 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 471 transitions. [2022-11-03 02:33:39,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:39,299 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 471 transitions. [2022-11-03 02:33:39,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 02:33:39,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:39,300 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:39,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:39,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-03 02:33:39,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:39,703 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:39,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:39,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1200458557, now seen corresponding path program 1 times [2022-11-03 02:33:39,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:39,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314002498] [2022-11-03 02:33:39,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:39,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:39,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:39,705 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:39,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:33:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:39,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:33:39,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:40,148 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:40,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:40,399 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:40,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314002498] [2022-11-03 02:33:40,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314002498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:40,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [188972404] [2022-11-03 02:33:40,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:40,400 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:33:40,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:33:40,401 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:33:40,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-03 02:33:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:40,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:33:40,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:33:40,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:40,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [188972404] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:40,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:33:40,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 12] total 25 [2022-11-03 02:33:40,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885700585] [2022-11-03 02:33:40,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:40,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:33:40,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:40,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:33:40,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:33:40,707 INFO L87 Difference]: Start difference. First operand 358 states and 471 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:40,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:40,810 INFO L93 Difference]: Finished difference Result 938 states and 1246 transitions. [2022-11-03 02:33:40,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:33:40,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-03 02:33:40,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:40,813 INFO L225 Difference]: With dead ends: 938 [2022-11-03 02:33:40,814 INFO L226 Difference]: Without dead ends: 614 [2022-11-03 02:33:40,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:33:40,815 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 186 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:40,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 163 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:33:40,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-11-03 02:33:40,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 366. [2022-11-03 02:33:40,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 1.2794520547945205) internal successors, (467), 365 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 02:33:40,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 467 transitions. [2022-11-03 02:33:40,849 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 467 transitions. Word has length 67 [2022-11-03 02:33:40,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:40,850 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 467 transitions. [2022-11-03 02:33:40,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:40,850 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 467 transitions. [2022-11-03 02:33:40,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 02:33:40,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:40,851 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:40,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-11-03 02:33:41,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-03 02:33:41,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:41,254 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:41,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:41,255 INFO L85 PathProgramCache]: Analyzing trace with hash -520400187, now seen corresponding path program 1 times [2022-11-03 02:33:41,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:41,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725741322] [2022-11-03 02:33:41,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:41,255 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:41,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:41,256 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:41,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 02:33:41,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:41,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:33:41,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:41,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:41,961 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:41,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725741322] [2022-11-03 02:33:41,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725741322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:41,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1794341600] [2022-11-03 02:33:41,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:41,962 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:33:41,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:33:41,963 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:33:41,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-03 02:33:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:42,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:33:42,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:42,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:42,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1794341600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:42,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969448257] [2022-11-03 02:33:42,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:42,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:42,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:42,698 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:42,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-03 02:33:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:42,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:33:42,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:33:42,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:33:43,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969448257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:43,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:33:43,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 8, 8, 6, 6] total 34 [2022-11-03 02:33:43,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257352314] [2022-11-03 02:33:43,110 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:33:43,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 02:33:43,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:43,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 02:33:43,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 02:33:43,111 INFO L87 Difference]: Start difference. First operand 366 states and 467 transitions. Second operand has 34 states, 34 states have (on average 6.5588235294117645) internal successors, (223), 34 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:50,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:50,136 INFO L93 Difference]: Finished difference Result 2501 states and 3199 transitions. [2022-11-03 02:33:50,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-11-03 02:33:50,137 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.5588235294117645) internal successors, (223), 34 states have internal predecessors, (223), 0 states have call successors, (0), 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 67 [2022-11-03 02:33:50,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:50,143 INFO L225 Difference]: With dead ends: 2501 [2022-11-03 02:33:50,143 INFO L226 Difference]: Without dead ends: 2169 [2022-11-03 02:33:50,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 362 SyntacticMatches, 2 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11778 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=6073, Invalid=25079, Unknown=0, NotChecked=0, Total=31152 [2022-11-03 02:33:50,150 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 3262 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 661 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3262 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 661 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:50,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3262 Valid, 1172 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [661 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 02:33:50,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2022-11-03 02:33:50,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 512. [2022-11-03 02:33:50,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.2622309197651664) internal successors, (645), 511 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:50,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 645 transitions. [2022-11-03 02:33:50,185 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 645 transitions. Word has length 67 [2022-11-03 02:33:50,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:50,185 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 645 transitions. [2022-11-03 02:33:50,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.5588235294117645) internal successors, (223), 34 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:50,185 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 645 transitions. [2022-11-03 02:33:50,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 02:33:50,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:50,186 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:50,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:50,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-03 02:33:50,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2022-11-03 02:33:50,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:33:50,803 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:50,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:50,803 INFO L85 PathProgramCache]: Analyzing trace with hash -671777533, now seen corresponding path program 1 times [2022-11-03 02:33:50,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:50,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965198700] [2022-11-03 02:33:50,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:50,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:50,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:50,805 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:50,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 02:33:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:50,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:33:50,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:33:51,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:51,055 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:51,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965198700] [2022-11-03 02:33:51,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965198700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:51,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:51,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:33:51,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772278160] [2022-11-03 02:33:51,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:51,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:33:51,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:51,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:33:51,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:33:51,058 INFO L87 Difference]: Start difference. First operand 512 states and 645 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:51,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:51,148 INFO L93 Difference]: Finished difference Result 1019 states and 1286 transitions. [2022-11-03 02:33:51,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:33:51,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-03 02:33:51,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:51,151 INFO L225 Difference]: With dead ends: 1019 [2022-11-03 02:33:51,151 INFO L226 Difference]: Without dead ends: 537 [2022-11-03 02:33:51,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 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 02:33:51,157 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 76 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:51,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 176 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:33:51,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-11-03 02:33:51,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 508. [2022-11-03 02:33:51,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 1.26232741617357) internal successors, (640), 507 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:51,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 640 transitions. [2022-11-03 02:33:51,180 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 640 transitions. Word has length 67 [2022-11-03 02:33:51,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:51,181 INFO L495 AbstractCegarLoop]: Abstraction has 508 states and 640 transitions. [2022-11-03 02:33:51,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:51,181 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 640 transitions. [2022-11-03 02:33:51,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 02:33:51,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:51,183 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:51,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:51,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:51,396 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:51,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:51,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1906596517, now seen corresponding path program 1 times [2022-11-03 02:33:51,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:51,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27489269] [2022-11-03 02:33:51,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:51,397 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:51,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:51,398 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:51,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 02:33:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:51,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:33:51,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 66 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:33:51,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 66 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:33:52,242 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:52,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27489269] [2022-11-03 02:33:52,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27489269] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:52,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1349973880] [2022-11-03 02:33:52,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:52,243 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:33:52,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:33:52,244 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:33:52,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-03 02:33:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:52,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:33:52,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 46 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:33:52,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:53,152 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 46 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:33:53,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1349973880] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:53,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777179849] [2022-11-03 02:33:53,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:53,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:53,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:53,154 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:53,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-03 02:33:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:53,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:33:53,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 80 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:33:53,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 66 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:33:53,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777179849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:53,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:33:53,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8, 8, 7, 7] total 35 [2022-11-03 02:33:53,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039721094] [2022-11-03 02:33:53,651 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:33:53,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 02:33:53,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:53,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 02:33:53,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:33:53,652 INFO L87 Difference]: Start difference. First operand 508 states and 640 transitions. Second operand has 35 states, 35 states have (on average 7.485714285714286) internal successors, (262), 35 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:59,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:59,650 INFO L93 Difference]: Finished difference Result 2726 states and 3493 transitions. [2022-11-03 02:33:59,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-11-03 02:33:59,653 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 7.485714285714286) internal successors, (262), 35 states have internal predecessors, (262), 0 states have call successors, (0), 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 98 [2022-11-03 02:33:59,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:59,659 INFO L225 Difference]: With dead ends: 2726 [2022-11-03 02:33:59,659 INFO L226 Difference]: Without dead ends: 2248 [2022-11-03 02:33:59,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 547 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6873 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3740, Invalid=17722, Unknown=0, NotChecked=0, Total=21462 [2022-11-03 02:33:59,663 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 2249 mSDsluCounter, 2337 mSDsCounter, 0 mSdLazyCounter, 1860 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2249 SdHoareTripleChecker+Valid, 2429 SdHoareTripleChecker+Invalid, 2276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 1860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:59,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2249 Valid, 2429 Invalid, 2276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 1860 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 02:33:59,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2022-11-03 02:33:59,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 760. [2022-11-03 02:33:59,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 1.22266139657444) internal successors, (928), 759 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:59,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 928 transitions. [2022-11-03 02:33:59,735 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 928 transitions. Word has length 98 [2022-11-03 02:33:59,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:59,735 INFO L495 AbstractCegarLoop]: Abstraction has 760 states and 928 transitions. [2022-11-03 02:33:59,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 7.485714285714286) internal successors, (262), 35 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:59,736 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 928 transitions. [2022-11-03 02:33:59,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 02:33:59,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:59,741 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:59,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:59,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:00,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-03 02:34:00,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:34:00,345 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:00,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:00,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1000343425, now seen corresponding path program 1 times [2022-11-03 02:34:00,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:34:00,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100008925] [2022-11-03 02:34:00,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:00,347 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:34:00,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:34:00,348 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:34:00,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 02:34:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:00,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:34:00,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 117 proven. 20 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:34:00,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:34:01,062 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 117 proven. 20 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:34:01,062 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:34:01,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100008925] [2022-11-03 02:34:01,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100008925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:34:01,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [754449850] [2022-11-03 02:34:01,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:01,063 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:34:01,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:34:01,063 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:34:01,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-03 02:34:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:01,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:34:01,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:01,502 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-03 02:34:01,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:34:01,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [754449850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:01,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:34:01,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 12] total 22 [2022-11-03 02:34:01,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993834022] [2022-11-03 02:34:01,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:01,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:34:01,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:34:01,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:34:01,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:34:01,504 INFO L87 Difference]: Start difference. First operand 760 states and 928 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:01,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:01,603 INFO L93 Difference]: Finished difference Result 1302 states and 1591 transitions. [2022-11-03 02:34:01,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:34:01,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 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 129 [2022-11-03 02:34:01,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:01,607 INFO L225 Difference]: With dead ends: 1302 [2022-11-03 02:34:01,608 INFO L226 Difference]: Without dead ends: 936 [2022-11-03 02:34:01,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:34:01,609 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 125 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:01,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 220 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:34:01,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-11-03 02:34:01,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 752. [2022-11-03 02:34:01,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 1.203728362183755) internal successors, (904), 751 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:01,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 904 transitions. [2022-11-03 02:34:01,645 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 904 transitions. Word has length 129 [2022-11-03 02:34:01,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:01,646 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 904 transitions. [2022-11-03 02:34:01,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:01,646 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 904 transitions. [2022-11-03 02:34:01,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 02:34:01,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:01,649 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:01,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:01,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2022-11-03 02:34:02,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:34:02,064 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:02,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:02,064 INFO L85 PathProgramCache]: Analyzing trace with hash -2029702723, now seen corresponding path program 2 times [2022-11-03 02:34:02,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:34:02,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675779459] [2022-11-03 02:34:02,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:34:02,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:34:02,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:34:02,066 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:34:02,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 02:34:02,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:34:02,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:34:02,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:34:02,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 117 proven. 20 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:34:02,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:34:02,734 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 117 proven. 20 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:34:02,734 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:34:02,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675779459] [2022-11-03 02:34:02,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675779459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:34:02,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1567905842] [2022-11-03 02:34:02,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:34:02,735 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:34:02,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:34:02,739 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:34:02,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-03 02:34:03,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:34:03,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:34:03,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:34:03,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 117 proven. 20 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:34:03,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:34:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 117 proven. 20 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:34:03,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1567905842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:34:03,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4875718] [2022-11-03 02:34:03,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:34:03,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:34:03,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:34:03,456 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:34:03,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-03 02:34:03,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:34:03,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:34:03,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:34:03,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:03,836 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-03 02:34:03,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:34:03,990 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-03 02:34:03,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4875718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:34:03,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:34:03,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 7, 7] total 24 [2022-11-03 02:34:03,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806502661] [2022-11-03 02:34:03,991 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:34:03,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 02:34:03,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:34:03,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 02:34:03,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:34:03,993 INFO L87 Difference]: Start difference. First operand 752 states and 904 transitions. Second operand has 24 states, 24 states have (on average 6.625) internal successors, (159), 24 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:05,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:05,769 INFO L93 Difference]: Finished difference Result 2459 states and 2973 transitions. [2022-11-03 02:34:05,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-03 02:34:05,770 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.625) internal successors, (159), 24 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2022-11-03 02:34:05,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:05,773 INFO L225 Difference]: With dead ends: 2459 [2022-11-03 02:34:05,773 INFO L226 Difference]: Without dead ends: 1727 [2022-11-03 02:34:05,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 800 GetRequests, 744 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=753, Invalid=2327, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 02:34:05,774 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 964 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:05,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [964 Valid, 741 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:34:05,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2022-11-03 02:34:05,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 770. [2022-11-03 02:34:05,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 1.1768530559167751) internal successors, (905), 769 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:05,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 905 transitions. [2022-11-03 02:34:05,831 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 905 transitions. Word has length 129 [2022-11-03 02:34:05,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:05,831 INFO L495 AbstractCegarLoop]: Abstraction has 770 states and 905 transitions. [2022-11-03 02:34:05,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.625) internal successors, (159), 24 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:05,831 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 905 transitions. [2022-11-03 02:34:05,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-03 02:34:05,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:05,835 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:05,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:06,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2022-11-03 02:34:06,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-11-03 02:34:06,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:34:06,450 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:06,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:06,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1725626309, now seen corresponding path program 1 times [2022-11-03 02:34:06,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:34:06,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127223346] [2022-11-03 02:34:06,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:06,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:34:06,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:34:06,453 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:34:06,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 02:34:06,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:06,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:34:06,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:07,099 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 270 proven. 35 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-03 02:34:07,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:34:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 302 proven. 3 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-03 02:34:07,380 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:34:07,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127223346] [2022-11-03 02:34:07,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127223346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:34:07,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1238980074] [2022-11-03 02:34:07,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:07,381 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:34:07,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:34:07,382 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:34:07,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-03 02:34:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:08,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:34:08,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 270 proven. 35 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-03 02:34:08,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:34:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 302 proven. 3 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-03 02:34:08,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1238980074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:34:08,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732960597] [2022-11-03 02:34:08,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:08,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:34:08,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:34:08,535 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:34:08,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-03 02:34:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:08,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:34:08,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 67 proven. 164 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-11-03 02:34:09,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:34:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 67 proven. 164 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-11-03 02:34:10,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732960597] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:34:10,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:34:10,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 12, 12] total 35 [2022-11-03 02:34:10,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869712868] [2022-11-03 02:34:10,165 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:34:10,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 02:34:10,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:34:10,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 02:34:10,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1104, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:34:10,168 INFO L87 Difference]: Start difference. First operand 770 states and 905 transitions. Second operand has 35 states, 35 states have (on average 8.257142857142858) internal successors, (289), 35 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:10,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:10,646 INFO L93 Difference]: Finished difference Result 861 states and 1000 transitions. [2022-11-03 02:34:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:34:10,647 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 8.257142857142858) internal successors, (289), 35 states have internal predecessors, (289), 0 states have call successors, (0), 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 191 [2022-11-03 02:34:10,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:10,647 INFO L225 Difference]: With dead ends: 861 [2022-11-03 02:34:10,647 INFO L226 Difference]: Without dead ends: 0 [2022-11-03 02:34:10,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1146 GetRequests, 1105 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 02:34:10,649 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 228 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:10,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 715 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:34:10,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-03 02:34:10,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-03 02:34:10,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:10,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-03 02:34:10,651 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 191 [2022-11-03 02:34:10,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:10,651 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-03 02:34:10,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 8.257142857142858) internal successors, (289), 35 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:10,651 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-03 02:34:10,651 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-03 02:34:10,654 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:34:10,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2022-11-03 02:34:10,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:11,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-03 02:34:11,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:34:11,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-03 02:34:11,907 INFO L899 garLoopResultBuilder]: For program point L159(line 159) no Hoare annotation was computed. [2022-11-03 02:34:11,907 INFO L899 garLoopResultBuilder]: For program point L159-2(line 159) no Hoare annotation was computed. [2022-11-03 02:34:11,907 INFO L899 garLoopResultBuilder]: For program point L151(line 151) no Hoare annotation was computed. [2022-11-03 02:34:11,907 INFO L899 garLoopResultBuilder]: For program point L151-2(line 151) no Hoare annotation was computed. [2022-11-03 02:34:11,907 INFO L899 garLoopResultBuilder]: For program point L176(line 176) no Hoare annotation was computed. [2022-11-03 02:34:11,907 INFO L899 garLoopResultBuilder]: For program point L176-2(line 176) no Hoare annotation was computed. [2022-11-03 02:34:11,907 INFO L895 garLoopResultBuilder]: At program point L234(lines 22 235) the Hoare annotation is: false [2022-11-03 02:34:11,907 INFO L899 garLoopResultBuilder]: For program point L193(line 193) no Hoare annotation was computed. [2022-11-03 02:34:11,907 INFO L899 garLoopResultBuilder]: For program point L193-2(line 193) no Hoare annotation was computed. [2022-11-03 02:34:11,907 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-03 02:34:11,908 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-11-03 02:34:11,908 INFO L899 garLoopResultBuilder]: For program point L185(line 185) no Hoare annotation was computed. [2022-11-03 02:34:11,908 INFO L899 garLoopResultBuilder]: For program point L185-2(line 185) no Hoare annotation was computed. [2022-11-03 02:34:11,908 INFO L899 garLoopResultBuilder]: For program point L20(line 20) no Hoare annotation was computed. [2022-11-03 02:34:11,908 INFO L899 garLoopResultBuilder]: For program point L20-1(line 20) no Hoare annotation was computed. [2022-11-03 02:34:11,908 INFO L899 garLoopResultBuilder]: For program point L210(line 210) no Hoare annotation was computed. [2022-11-03 02:34:11,908 INFO L899 garLoopResultBuilder]: For program point L20-3(line 20) no Hoare annotation was computed. [2022-11-03 02:34:11,908 INFO L899 garLoopResultBuilder]: For program point L210-2(line 210) no Hoare annotation was computed. [2022-11-03 02:34:11,908 INFO L899 garLoopResultBuilder]: For program point L202(line 202) no Hoare annotation was computed. [2022-11-03 02:34:11,908 INFO L899 garLoopResultBuilder]: For program point L202-2(line 202) no Hoare annotation was computed. [2022-11-03 02:34:11,908 INFO L899 garLoopResultBuilder]: For program point L171(line 171) no Hoare annotation was computed. [2022-11-03 02:34:11,909 INFO L899 garLoopResultBuilder]: For program point L171-2(line 171) no Hoare annotation was computed. [2022-11-03 02:34:11,909 INFO L899 garLoopResultBuilder]: For program point L155(line 155) no Hoare annotation was computed. [2022-11-03 02:34:11,909 INFO L899 garLoopResultBuilder]: For program point L155-2(line 155) no Hoare annotation was computed. [2022-11-03 02:34:11,909 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-11-03 02:34:11,909 INFO L899 garLoopResultBuilder]: For program point L222(line 222) no Hoare annotation was computed. [2022-11-03 02:34:11,910 INFO L899 garLoopResultBuilder]: For program point L189(line 189) no Hoare annotation was computed. [2022-11-03 02:34:11,910 INFO L899 garLoopResultBuilder]: For program point L222-2(line 222) no Hoare annotation was computed. [2022-11-03 02:34:11,910 INFO L899 garLoopResultBuilder]: For program point L189-2(line 189) no Hoare annotation was computed. [2022-11-03 02:34:11,910 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 20) no Hoare annotation was computed. [2022-11-03 02:34:11,910 INFO L899 garLoopResultBuilder]: For program point L206(line 206) no Hoare annotation was computed. [2022-11-03 02:34:11,910 INFO L899 garLoopResultBuilder]: For program point L206-2(line 206) no Hoare annotation was computed. [2022-11-03 02:34:11,910 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-03 02:34:11,911 INFO L895 garLoopResultBuilder]: At program point L92-2(lines 92 233) the Hoare annotation is: (let ((.cse0 (= (_ bv1 8) |ULTIMATE.start_main_~mask_SORT_1~0#1|)) (.cse1 (= (_ bv0 8) |ULTIMATE.start_main_~state_27~0#1|)) (.cse3 (= |ULTIMATE.start_main_~var_7~0#1| (_ bv0 8))) (.cse4 (= (_ bv0 8) |ULTIMATE.start_main_~state_57~0#1|)) (.cse5 (= (_ bv1 8) |ULTIMATE.start_main_~var_21~0#1|)) (.cse7 (= (_ bv0 8) |ULTIMATE.start_main_~state_61~0#1|)) (.cse8 (= |ULTIMATE.start_main_~var_12~0#1| (_ bv0 32))) (.cse10 (= (_ bv0 8) |ULTIMATE.start_main_~state_14~0#1|))) (or (let ((.cse6 ((_ extract 7 0) ((_ zero_extend 24) |ULTIMATE.start_main_~var_7~0#1|)))) (let ((.cse9 ((_ extract 7 0) ((_ zero_extend 24) .cse6)))) (let ((.cse2 ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) .cse9))) (_ bv1 32))))) (and (= (_ bv0 8) |ULTIMATE.start_main_~next_82_arg_1~0#1|) .cse0 (= |ULTIMATE.start_main_~next_98_arg_1~0#1| (_ bv0 8)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv1 32)) .cse1 (= |ULTIMATE.start_main_~var_97_arg_0~0#1| (_ bv0 8)) (= |ULTIMATE.start_main_~next_96_arg_1~0#1| .cse2) (= (_ bv1 8) |ULTIMATE.start_main_~var_88_arg_0~0#1|) (= |ULTIMATE.start_main_~var_99_arg_2~0#1| (_ bv0 8)) (= |ULTIMATE.start_main_~var_83_arg_1~0#1| (_ bv0 8)) (= (_ bv0 8) |ULTIMATE.start_main_~var_86_arg_2~0#1|) (= (_ bv1 8) |ULTIMATE.start_main_~var_93~0#1|) (= .cse2 |ULTIMATE.start_main_~state_40~0#1|) (= |ULTIMATE.start_main_~var_73_arg_0~0#1| (_ bv0 8)) .cse3 (= (_ bv1 8) |ULTIMATE.start_main_~var_94_arg_0~0#1|) (= (_ bv1 8) |ULTIMATE.start_main_~var_87~0#1|) (= |ULTIMATE.start_main_~var_92_arg_2~0#1| |ULTIMATE.start_main_~var_7~0#1|) (= |ULTIMATE.start_main_~next_90_arg_1~0#1| (_ bv0 8)) (= (_ bv1 8) |ULTIMATE.start_main_~var_86_arg_1~0#1|) (= |ULTIMATE.start_main_~var_89_arg_0~0#1| (_ bv0 8)) .cse4 (= (_ bv1 8) |ULTIMATE.start_main_~var_80_arg_0~0#1|) (= |ULTIMATE.start_main_~var_92_arg_0~0#1| (_ bv0 8)) (= |ULTIMATE.start_main_~var_89_arg_2~0#1| (_ bv0 8)) (= |ULTIMATE.start_main_~state_40~0#1| |ULTIMATE.start_main_~var_76_arg_0~0#1|) .cse5 (= |ULTIMATE.start_main_~var_81_arg_0~0#1| (_ bv0 8)) (= (_ bv0 8) |ULTIMATE.start_main_~var_86_arg_0~0#1|) (= |ULTIMATE.start_main_~var_95_arg_0~0#1| (_ bv0 8)) (= |ULTIMATE.start_main_~var_80_arg_1~0#1| (_ bv0 8)) (= |ULTIMATE.start_main_~var_94_arg_1~0#1| .cse6) (= |ULTIMATE.start_main_~var_97_arg_2~0#1| (_ bv0 8)) .cse7 (= |ULTIMATE.start_main_~var_97_arg_1~0#1| (_ bv0 8)) .cse8 (= .cse9 |ULTIMATE.start_main_~var_95_arg_2~0#1|) (= |ULTIMATE.start_main_~var_88_arg_1~0#1| (_ bv0 8)) (= |ULTIMATE.start_main_~var_83_arg_0~0#1| (_ bv0 8)) .cse10)))) (and .cse0 .cse1 (= (_ bv0 8) |ULTIMATE.start_main_~state_25~0#1|) .cse3 (= |ULTIMATE.start_main_~var_7~0#1| |ULTIMATE.start_main_~state_40~0#1|) .cse4 .cse5 .cse7 .cse8 .cse10))) [2022-11-03 02:34:11,911 INFO L899 garLoopResultBuilder]: For program point L92-3(lines 92 233) no Hoare annotation was computed. [2022-11-03 02:34:11,911 INFO L899 garLoopResultBuilder]: For program point L216(line 216) no Hoare annotation was computed. [2022-11-03 02:34:11,911 INFO L899 garLoopResultBuilder]: For program point L216-2(line 216) no Hoare annotation was computed. [2022-11-03 02:34:11,911 INFO L899 garLoopResultBuilder]: For program point L167(line 167) no Hoare annotation was computed. [2022-11-03 02:34:11,911 INFO L899 garLoopResultBuilder]: For program point L167-2(line 167) no Hoare annotation was computed. [2022-11-03 02:34:11,914 INFO L444 BasicCegarLoop]: Path program 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] [2022-11-03 02:34:11,916 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:34:11,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:34:11 BoogieIcfgContainer [2022-11-03 02:34:11,950 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:34:11,950 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:34:11,950 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:34:11,951 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:34:11,951 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:33:05" (3/4) ... [2022-11-03 02:34:11,954 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-03 02:34:11,974 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-11-03 02:34:11,976 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-03 02:34:11,977 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-03 02:34:12,042 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.witnessprinter has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSLBacktranslationValueProvider.getStringFromIASTNode(CACSLBacktranslationValueProvider.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSLBacktranslationValueProvider.getStringFromStep(CACSLBacktranslationValueProvider.java:59) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSLBacktranslationValueProvider.getStringFromStep(CACSLBacktranslationValueProvider.java:1) at de.uni_freiburg.informatik.ultimate.witnessprinter.graphml.GeneratedWitnessEdge.getSourceCode(GeneratedWitnessEdge.java:153) at de.uni_freiburg.informatik.ultimate.witnessprinter.CorrectnessWitnessGenerator.lambda$2(CorrectnessWitnessGenerator.java:95) at edu.uci.ics.jung.io.GraphMLWriter.writeEdgeData(GraphMLWriter.java:237) at de.uni_freiburg.informatik.ultimate.witnessprinter.graphml.UltimateGraphMLWriter.save(UltimateGraphMLWriter.java:106) at de.uni_freiburg.informatik.ultimate.witnessprinter.CorrectnessWitnessGenerator.makeGraphMLString(CorrectnessWitnessGenerator.java:115) at de.uni_freiburg.informatik.ultimate.witnessprinter.WitnessPrinter.generateProofWitness(WitnessPrinter.java:158) at de.uni_freiburg.informatik.ultimate.witnessprinter.WitnessPrinter.finish(WitnessPrinter.java:138) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:131) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 02:34:12,047 INFO L158 Benchmark]: Toolchain (without parser) took 67695.94ms. Allocated memory was 52.4MB in the beginning and 272.6MB in the end (delta: 220.2MB). Free memory was 28.5MB in the beginning and 104.0MB in the end (delta: -75.5MB). Peak memory consumption was 144.9MB. Max. memory is 16.1GB. [2022-11-03 02:34:12,047 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 52.4MB. Free memory was 32.7MB in the beginning and 32.6MB in the end (delta: 63.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:34:12,048 INFO L158 Benchmark]: CACSL2BoogieTranslator took 506.49ms. Allocated memory is still 52.4MB. Free memory was 28.4MB in the beginning and 29.7MB in the end (delta: -1.3MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. [2022-11-03 02:34:12,048 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.50ms. Allocated memory is still 52.4MB. Free memory was 29.7MB in the beginning and 27.1MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 02:34:12,048 INFO L158 Benchmark]: Boogie Preprocessor took 37.63ms. Allocated memory is still 52.4MB. Free memory was 27.1MB in the beginning and 25.1MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:34:12,051 INFO L158 Benchmark]: RCFGBuilder took 823.92ms. Allocated memory was 52.4MB in the beginning and 71.3MB in the end (delta: 18.9MB). Free memory was 25.1MB in the beginning and 36.0MB in the end (delta: -10.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:34:12,052 INFO L158 Benchmark]: TraceAbstraction took 66163.42ms. Allocated memory was 71.3MB in the beginning and 272.6MB in the end (delta: 201.3MB). Free memory was 35.3MB in the beginning and 108.2MB in the end (delta: -72.9MB). Peak memory consumption was 128.7MB. Max. memory is 16.1GB. [2022-11-03 02:34:12,054 INFO L158 Benchmark]: Witness Printer took 96.15ms. Allocated memory is still 272.6MB. Free memory was 108.2MB in the beginning and 104.0MB in the end (delta: 4.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:34:12,057 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 52.4MB. Free memory was 32.7MB in the beginning and 32.6MB in the end (delta: 63.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 506.49ms. Allocated memory is still 52.4MB. Free memory was 28.4MB in the beginning and 29.7MB in the end (delta: -1.3MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.50ms. Allocated memory is still 52.4MB. Free memory was 29.7MB in the beginning and 27.1MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.63ms. Allocated memory is still 52.4MB. Free memory was 27.1MB in the beginning and 25.1MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 823.92ms. Allocated memory was 52.4MB in the beginning and 71.3MB in the end (delta: 18.9MB). Free memory was 25.1MB in the beginning and 36.0MB in the end (delta: -10.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 66163.42ms. Allocated memory was 71.3MB in the beginning and 272.6MB in the end (delta: 201.3MB). Free memory was 35.3MB in the beginning and 108.2MB in the end (delta: -72.9MB). Peak memory consumption was 128.7MB. Max. memory is 16.1GB. * Witness Printer took 96.15ms. Allocated memory is still 272.6MB. Free memory was 108.2MB in the beginning and 104.0MB in the end (delta: 4.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 20]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 66.0s, OverallIterations: 25, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 28.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13221 SdHoareTripleChecker+Valid, 7.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 13221 mSDsluCounter, 13803 SdHoareTripleChecker+Invalid, 6.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 144 IncrementalHoareTripleChecker+Unchecked, 12139 mSDsCounter, 1668 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7938 IncrementalHoareTripleChecker+Invalid, 9750 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1668 mSolverCounterUnsat, 1664 mSDtfsCounter, 7938 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6021 GetRequests, 5198 SyntacticMatches, 12 SemanticMatches, 811 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28789 ImplicationChecksByTransitivity, 25.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=770occurred in iteration=24, InterpolantAutomatonStates: 583, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 25 MinimizatonAttempts, 8333 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 7 NumberOfFragments, 180 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 2 FomulaSimplificationsInter, 8616 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 2.4s SsaConstructionTime, 4.8s SatisfiabilityAnalysisTime, 17.6s InterpolantComputationTime, 3227 NumberOfCodeBlocks, 3227 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 5519 ConstructedInterpolants, 96 QuantifiedInterpolants, 28319 SizeOfPredicates, 376 NumberOfNonLiveVariables, 18661 ConjunctsInSsa, 499 ConjunctsInUnsatCore, 70 InterpolantComputations, 18 PerfectInterpolantSequences, 5443/6321 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 92]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((0bv8 == next_82_arg_1 && 1bv8 == mask_SORT_1) && next_98_arg_1 == 0bv8) && cond == 1bv32) && 0bv8 == state_27) && var_97_arg_0 == 0bv8) && next_96_arg_1 == ~bvand32(~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(var_7)[7:0])[7:0])[7:0]), 1bv32)[7:0]) && 1bv8 == var_88_arg_0) && var_99_arg_2 == 0bv8) && var_83_arg_1 == 0bv8) && 0bv8 == var_86_arg_2) && 1bv8 == var_93) && ~bvand32(~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(var_7)[7:0])[7:0])[7:0]), 1bv32)[7:0] == state_40) && var_73_arg_0 == 0bv8) && var_7 == 0bv8) && 1bv8 == var_94_arg_0) && 1bv8 == var_87) && var_92_arg_2 == var_7) && next_90_arg_1 == 0bv8) && 1bv8 == var_86_arg_1) && var_89_arg_0 == 0bv8) && 0bv8 == state_57) && 1bv8 == var_80_arg_0) && var_92_arg_0 == 0bv8) && var_89_arg_2 == 0bv8) && state_40 == var_76_arg_0) && 1bv8 == var_21) && var_81_arg_0 == 0bv8) && 0bv8 == var_86_arg_0) && var_95_arg_0 == 0bv8) && var_80_arg_1 == 0bv8) && var_94_arg_1 == ~zero_extendFrom16To32(var_7)[7:0]) && var_97_arg_2 == 0bv8) && 0bv8 == state_61) && var_97_arg_1 == 0bv8) && var_12 == 0bv32) && ~zero_extendFrom16To32(~zero_extendFrom16To32(var_7)[7:0])[7:0] == var_95_arg_2) && var_88_arg_1 == 0bv8) && var_83_arg_0 == 0bv8) && 0bv8 == state_14) || (((((((((1bv8 == mask_SORT_1 && 0bv8 == state_27) && 0bv8 == state_25) && var_7 == 0bv8) && var_7 == state_40) && 0bv8 == state_57) && 1bv8 == var_21) && 0bv8 == state_61) && var_12 == 0bv32) && 0bv8 == state_14) * Results from de.uni_freiburg.informatik.ultimate.witnessprinter: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.witnessprinter: NullPointerException: null: de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSLBacktranslationValueProvider.getStringFromIASTNode(CACSLBacktranslationValueProvider.java:78) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 02:34:12,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d14e531-6b40-4fec-93df-e172efd0db2d/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 Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: NullPointerException: null