./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.counter_v.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_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/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_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.counter_v.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/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_5224822b-ee35-4ca4-87ba-d406fc7a9951/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 55ae7de02214639b88d4da3eeb9e04383c1cc79eda3403226c023fe809370fb9 --- 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 02:41:01,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:41:01,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:41:01,065 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:41:01,066 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:41:01,067 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:41:01,068 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:41:01,070 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:41:01,071 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:41:01,072 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:41:01,073 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:41:01,074 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:41:01,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:41:01,075 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:41:01,076 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:41:01,077 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:41:01,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:41:01,079 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:41:01,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:41:01,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:41:01,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:41:01,085 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:41:01,086 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:41:01,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:41:01,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:41:01,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:41:01,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:41:01,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:41:01,093 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:41:01,094 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:41:01,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:41:01,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:41:01,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:41:01,096 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:41:01,097 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:41:01,097 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:41:01,101 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:41:01,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:41:01,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:41:01,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:41:01,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:41:01,105 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:41:01,126 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:41:01,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:41:01,127 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:41:01,127 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:41:01,128 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:41:01,128 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:41:01,129 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:41:01,129 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:41:01,129 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:41:01,129 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:41:01,130 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:41:01,130 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:41:01,130 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:41:01,130 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:41:01,131 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:41:01,131 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:41:01,131 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:41:01,131 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:41:01,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:41:01,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:41:01,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:41:01,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:41:01,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:41:01,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:41:01,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:41:01,133 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:41:01,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:41:01,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:41:01,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:41:01,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:41:01,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:41:01,135 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:41:01,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:41:01,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:41:01,135 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:41:01,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:41:01,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:41:01,136 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:41:01,136 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_5224822b-ee35-4ca4-87ba-d406fc7a9951/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 55ae7de02214639b88d4da3eeb9e04383c1cc79eda3403226c023fe809370fb9 [2022-11-03 02:41:01,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:41:01,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:41:01,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:41:01,464 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:41:01,464 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:41:01,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.counter_v.c [2022-11-03 02:41:01,547 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/data/96ce08365/fd592de90f6143d499823ac9a8a6da9d/FLAG09ef1bffa [2022-11-03 02:41:02,018 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:41:02,019 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.counter_v.c [2022-11-03 02:41:02,024 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/data/96ce08365/fd592de90f6143d499823ac9a8a6da9d/FLAG09ef1bffa [2022-11-03 02:41:02,381 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/data/96ce08365/fd592de90f6143d499823ac9a8a6da9d [2022-11-03 02:41:02,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:41:02,385 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:41:02,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:41:02,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:41:02,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:41:02,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:41:02" (1/1) ... [2022-11-03 02:41:02,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7614ba42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:02, skipping insertion in model container [2022-11-03 02:41:02,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:41:02" (1/1) ... [2022-11-03 02:41:02,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:41:02,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:41:02,596 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_5224822b-ee35-4ca4-87ba-d406fc7a9951/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.counter_v.c[1107,1120] [2022-11-03 02:41:02,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:41:02,663 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:41:02,679 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_5224822b-ee35-4ca4-87ba-d406fc7a9951/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.counter_v.c[1107,1120] [2022-11-03 02:41:02,709 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:41:02,728 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:41:02,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:02 WrapperNode [2022-11-03 02:41:02,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:41:02,730 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:41:02,730 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:41:02,731 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:41:02,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:02" (1/1) ... [2022-11-03 02:41:02,753 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:02" (1/1) ... [2022-11-03 02:41:02,788 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2022-11-03 02:41:02,790 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:41:02,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:41:02,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:41:02,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:41:02,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:02" (1/1) ... [2022-11-03 02:41:02,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:02" (1/1) ... [2022-11-03 02:41:02,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:02" (1/1) ... [2022-11-03 02:41:02,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:02" (1/1) ... [2022-11-03 02:41:02,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:02" (1/1) ... [2022-11-03 02:41:02,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:02" (1/1) ... [2022-11-03 02:41:02,830 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:02" (1/1) ... [2022-11-03 02:41:02,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:02" (1/1) ... [2022-11-03 02:41:02,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:41:02,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:41:02,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:41:02,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:41:02,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:02" (1/1) ... [2022-11-03 02:41:02,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:41:02,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:02,876 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:41:02,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:41:02,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:41:02,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:41:03,001 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:41:03,004 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:41:03,223 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:41:03,273 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:41:03,274 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:41:03,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:41:03 BoogieIcfgContainer [2022-11-03 02:41:03,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:41:03,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:41:03,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:41:03,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:41:03,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:41:02" (1/3) ... [2022-11-03 02:41:03,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6ef108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:41:03, skipping insertion in model container [2022-11-03 02:41:03,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:02" (2/3) ... [2022-11-03 02:41:03,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6ef108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:41:03, skipping insertion in model container [2022-11-03 02:41:03,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:41:03" (3/3) ... [2022-11-03 02:41:03,286 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.counter_v.c [2022-11-03 02:41:03,305 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:41:03,305 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:41:03,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:41:03,361 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;@25469bf1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:41:03,374 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:41:03,378 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 02:41:03,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:41:03,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:03,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:41:03,399 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:03,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:03,411 INFO L85 PathProgramCache]: Analyzing trace with hash 2214562, now seen corresponding path program 1 times [2022-11-03 02:41:03,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:03,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107938527] [2022-11-03 02:41:03,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:03,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:41:03,660 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:41:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:41:03,772 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:41:03,775 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:41:03,779 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:41:03,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:41:03,786 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:41:03,790 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:41:03,808 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:41:03,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:41:03 BoogieIcfgContainer [2022-11-03 02:41:03,817 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:41:03,819 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:41:03,819 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:41:03,820 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:41:03,821 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:41:03" (3/4) ... [2022-11-03 02:41:03,824 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:41:03,825 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:41:03,827 INFO L158 Benchmark]: Toolchain (without parser) took 1441.65ms. Allocated memory is still 121.6MB. Free memory was 89.2MB in the beginning and 57.4MB in the end (delta: 31.8MB). Peak memory consumption was 28.3MB. Max. memory is 16.1GB. [2022-11-03 02:41:03,828 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 81.8MB. Free memory is still 38.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:41:03,828 INFO L158 Benchmark]: CACSL2BoogieTranslator took 339.23ms. Allocated memory is still 121.6MB. Free memory was 89.2MB in the beginning and 97.3MB in the end (delta: -8.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:41:03,831 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.13ms. Allocated memory is still 121.6MB. Free memory was 97.3MB in the beginning and 95.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:41:03,831 INFO L158 Benchmark]: Boogie Preprocessor took 50.23ms. Allocated memory is still 121.6MB. Free memory was 95.2MB in the beginning and 94.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:41:03,836 INFO L158 Benchmark]: RCFGBuilder took 435.12ms. Allocated memory is still 121.6MB. Free memory was 93.8MB in the beginning and 78.8MB in the end (delta: 15.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 02:41:03,837 INFO L158 Benchmark]: TraceAbstraction took 538.06ms. Allocated memory is still 121.6MB. Free memory was 78.1MB in the beginning and 58.1MB in the end (delta: 20.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-11-03 02:41:03,838 INFO L158 Benchmark]: Witness Printer took 6.42ms. Allocated memory is still 121.6MB. Free memory was 57.8MB in the beginning and 57.4MB in the end (delta: 343.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:41:03,847 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 81.8MB. Free memory is still 38.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 339.23ms. Allocated memory is still 121.6MB. Free memory was 89.2MB in the beginning and 97.3MB in the end (delta: -8.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.13ms. Allocated memory is still 121.6MB. Free memory was 97.3MB in the beginning and 95.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 50.23ms. Allocated memory is still 121.6MB. Free memory was 95.2MB in the beginning and 94.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 435.12ms. Allocated memory is still 121.6MB. Free memory was 93.8MB in the beginning and 78.8MB in the end (delta: 15.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 538.06ms. Allocated memory is still 121.6MB. Free memory was 78.1MB in the beginning and 58.1MB in the end (delta: 20.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Witness Printer took 6.42ms. Allocated memory is still 121.6MB. Free memory was 57.8MB in the beginning and 57.4MB in the end (delta: 343.4kB). 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 53, overapproximation of bitwiseAnd at line 46. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 4); [L29] const SORT_4 msb_SORT_4 = (SORT_4)1 << (4 - 1); [L31] const SORT_4 var_5 = 1; [L32] const SORT_4 var_8 = 15; [L33] const SORT_1 var_12 = 1; [L35] SORT_1 input_2; [L36] SORT_1 input_3; [L38] SORT_4 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_4; [L40] SORT_4 init_7_arg_1 = var_5; [L41] state_6 = init_7_arg_1 VAL [init_7_arg_1=1, mask_SORT_1=1, mask_SORT_4=15, msb_SORT_1=1, msb_SORT_4=8, state_6=1, var_12=1, var_5=1, var_8=15] [L44] input_2 = __VERIFIER_nondet_uchar() [L45] input_3 = __VERIFIER_nondet_uchar() [L46] input_3 = input_3 & mask_SORT_1 [L49] SORT_4 var_9_arg_0 = state_6; [L50] SORT_4 var_9_arg_1 = var_8; [L51] SORT_1 var_9 = var_9_arg_0 != var_9_arg_1; [L52] SORT_1 var_13_arg_0 = var_9; [L53] SORT_1 var_13 = ~var_13_arg_0; [L54] SORT_1 var_14_arg_0 = var_12; [L55] SORT_1 var_14_arg_1 = var_13; [L56] SORT_1 var_14 = var_14_arg_0 & var_14_arg_1; [L57] var_14 = var_14 & mask_SORT_1 [L58] SORT_1 bad_15_arg_0 = var_14; [L59] CALL __VERIFIER_assert(!(bad_15_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: 0.4s, 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, 0.1s 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 02:41:03,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/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_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.counter_v.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/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_5224822b-ee35-4ca4-87ba-d406fc7a9951/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 55ae7de02214639b88d4da3eeb9e04383c1cc79eda3403226c023fe809370fb9 --- 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 02:41:06,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:41:06,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:41:06,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:41:06,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:41:06,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:41:06,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:41:06,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:41:06,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:41:06,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:41:06,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:41:06,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:41:06,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:41:06,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:41:06,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:41:06,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:41:06,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:41:06,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:41:06,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:41:06,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:41:06,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:41:06,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:41:06,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:41:06,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:41:06,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:41:06,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:41:06,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:41:06,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:41:06,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:41:06,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:41:06,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:41:06,243 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:41:06,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:41:06,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:41:06,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:41:06,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:41:06,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:41:06,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:41:06,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:41:06,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:41:06,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:41:06,250 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:41:06,284 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:41:06,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:41:06,285 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:41:06,285 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:41:06,286 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:41:06,286 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:41:06,286 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:41:06,286 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:41:06,287 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:41:06,287 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:41:06,287 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:41:06,287 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:41:06,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:41:06,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:41:06,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:41:06,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:41:06,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:41:06,289 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:41:06,289 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:41:06,289 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:41:06,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:41:06,290 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:41:06,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:41:06,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:41:06,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:41:06,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:41:06,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:41:06,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:41:06,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:41:06,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:41:06,291 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:41:06,291 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:06,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:41:06,292 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:41:06,292 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:41:06,292 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_5224822b-ee35-4ca4-87ba-d406fc7a9951/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 55ae7de02214639b88d4da3eeb9e04383c1cc79eda3403226c023fe809370fb9 [2022-11-03 02:41:06,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:41:06,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:41:06,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:41:06,717 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:41:06,720 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:41:06,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.counter_v.c [2022-11-03 02:41:06,802 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/data/37b059a31/eacc28a81e52493d842cc51e6ed65aa7/FLAG3beeae87d [2022-11-03 02:41:07,344 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:41:07,345 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.counter_v.c [2022-11-03 02:41:07,352 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/data/37b059a31/eacc28a81e52493d842cc51e6ed65aa7/FLAG3beeae87d [2022-11-03 02:41:07,701 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/data/37b059a31/eacc28a81e52493d842cc51e6ed65aa7 [2022-11-03 02:41:07,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:41:07,705 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:41:07,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:41:07,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:41:07,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:41:07,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:41:07" (1/1) ... [2022-11-03 02:41:07,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f1a63fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:07, skipping insertion in model container [2022-11-03 02:41:07,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:41:07" (1/1) ... [2022-11-03 02:41:07,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:41:07,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:41:07,874 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_5224822b-ee35-4ca4-87ba-d406fc7a9951/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.counter_v.c[1107,1120] [2022-11-03 02:41:07,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:41:07,913 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:41:07,957 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_5224822b-ee35-4ca4-87ba-d406fc7a9951/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.counter_v.c[1107,1120] [2022-11-03 02:41:07,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:41:07,991 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:41:07,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:07 WrapperNode [2022-11-03 02:41:07,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:41:07,993 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:41:07,993 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:41:07,993 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:41:07,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:07" (1/1) ... [2022-11-03 02:41:08,004 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:07" (1/1) ... [2022-11-03 02:41:08,021 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2022-11-03 02:41:08,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:41:08,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:41:08,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:41:08,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:41:08,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:07" (1/1) ... [2022-11-03 02:41:08,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:07" (1/1) ... [2022-11-03 02:41:08,033 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:07" (1/1) ... [2022-11-03 02:41:08,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:07" (1/1) ... [2022-11-03 02:41:08,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:07" (1/1) ... [2022-11-03 02:41:08,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:07" (1/1) ... [2022-11-03 02:41:08,042 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:07" (1/1) ... [2022-11-03 02:41:08,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:07" (1/1) ... [2022-11-03 02:41:08,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:41:08,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:41:08,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:41:08,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:41:08,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:07" (1/1) ... [2022-11-03 02:41:08,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:41:08,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:08,086 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:41:08,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:41:08,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:41:08,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:41:08,207 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:41:08,209 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:41:08,450 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:41:08,457 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:41:08,457 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:41:08,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:41:08 BoogieIcfgContainer [2022-11-03 02:41:08,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:41:08,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:41:08,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:41:08,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:41:08,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:41:07" (1/3) ... [2022-11-03 02:41:08,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@637619bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:41:08, skipping insertion in model container [2022-11-03 02:41:08,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:07" (2/3) ... [2022-11-03 02:41:08,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@637619bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:41:08, skipping insertion in model container [2022-11-03 02:41:08,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:41:08" (3/3) ... [2022-11-03 02:41:08,471 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.counter_v.c [2022-11-03 02:41:08,490 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:41:08,490 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:41:08,553 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:41:08,571 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;@7741773a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:41:08,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:41:08,577 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:08,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:41:08,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:08,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:41:08,585 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:08,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:08,592 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 02:41:08,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:08,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106300024] [2022-11-03 02:41:08,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:08,608 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:08,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:08,614 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:08,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:41:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:08,718 WARN L261 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:41:08,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:09,001 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 02:41:09,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:09,002 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:09,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106300024] [2022-11-03 02:41:09,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106300024] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:09,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:09,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:41:09,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556582812] [2022-11-03 02:41:09,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:09,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:41:09,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:09,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:41:09,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:41:09,043 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 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 02:41:09,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:09,134 INFO L93 Difference]: Finished difference Result 32 states and 48 transitions. [2022-11-03 02:41:09,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:41:09,137 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 02:41:09,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:09,146 INFO L225 Difference]: With dead ends: 32 [2022-11-03 02:41:09,146 INFO L226 Difference]: Without dead ends: 19 [2022-11-03 02:41:09,155 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 02:41:09,161 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:09,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:41:09,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-03 02:41:09,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 13. [2022-11-03 02:41:09,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:09,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-03 02:41:09,198 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 5 [2022-11-03 02:41:09,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:09,198 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-03 02:41:09,199 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 02:41:09,199 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-03 02:41:09,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 02:41:09,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:09,200 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:09,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:09,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:41:09,412 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:09,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:09,412 INFO L85 PathProgramCache]: Analyzing trace with hash 505863741, now seen corresponding path program 1 times [2022-11-03 02:41:09,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:09,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505288325] [2022-11-03 02:41:09,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:09,414 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:09,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:09,418 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:09,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:41:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:09,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:41:09,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:09,598 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 02:41:09,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:09,599 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:09,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505288325] [2022-11-03 02:41:09,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505288325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:09,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:09,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:41:09,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003826389] [2022-11-03 02:41:09,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:09,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:41:09,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:09,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:41:09,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:41:09,602 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:09,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:09,660 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-11-03 02:41:09,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:41:09,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-11-03 02:41:09,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:09,663 INFO L225 Difference]: With dead ends: 35 [2022-11-03 02:41:09,663 INFO L226 Difference]: Without dead ends: 26 [2022-11-03 02:41:09,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 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 02:41:09,666 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 30 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 02:41:09,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 30 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:41:09,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-03 02:41:09,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 15. [2022-11-03 02:41:09,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:09,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-11-03 02:41:09,685 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2022-11-03 02:41:09,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:09,686 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-03 02:41:09,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:09,690 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-11-03 02:41:09,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 02:41:09,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:09,691 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:09,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:09,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:41:09,898 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:09,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:09,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2014096193, now seen corresponding path program 1 times [2022-11-03 02:41:09,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:09,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635789584] [2022-11-03 02:41:09,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:09,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:09,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:09,911 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:09,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:41:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:09,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:41:09,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:10,228 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 02:41:10,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:10,733 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 02:41:10,734 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:10,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635789584] [2022-11-03 02:41:10,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635789584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:10,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [806551707] [2022-11-03 02:41:10,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:10,739 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:10,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:10,741 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:10,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-03 02:41:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:10,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:41:10,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:10,941 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 02:41:10,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:11,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [806551707] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:11,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614716480] [2022-11-03 02:41:11,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:11,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:11,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:11,154 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:11,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:41:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:11,212 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 02:41:11,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:11,614 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 02:41:11,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:12,383 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 02:41:12,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614716480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:12,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:41:12,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 10, 11] total 26 [2022-11-03 02:41:12,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274901661] [2022-11-03 02:41:12,385 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:41:12,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:41:12,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:12,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:41:12,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:41:12,387 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:12,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:12,935 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-11-03 02:41:12,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:41:12,936 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 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 12 [2022-11-03 02:41:12,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:12,937 INFO L225 Difference]: With dead ends: 40 [2022-11-03 02:41:12,937 INFO L226 Difference]: Without dead ends: 31 [2022-11-03 02:41:12,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:41:12,939 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 103 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:12,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 70 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 65 Invalid, 0 Unknown, 92 Unchecked, 0.1s Time] [2022-11-03 02:41:12,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-03 02:41:12,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 18. [2022-11-03 02:41:12,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:12,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-11-03 02:41:12,943 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2022-11-03 02:41:12,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:12,944 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-11-03 02:41:12,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:12,944 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-11-03 02:41:12,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 02:41:12,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:12,945 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:12,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:13,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:13,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2022-11-03 02:41:13,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:13,567 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:13,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:13,567 INFO L85 PathProgramCache]: Analyzing trace with hash -2015943235, now seen corresponding path program 1 times [2022-11-03 02:41:13,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:13,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717779408] [2022-11-03 02:41:13,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:13,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:13,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:13,569 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:13,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:41:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:13,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:41:13,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:13,809 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 02:41:13,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:14,319 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 02:41:14,319 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:14,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717779408] [2022-11-03 02:41:14,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717779408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:14,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1798160796] [2022-11-03 02:41:14,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:14,320 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:14,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:14,335 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:14,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-03 02:41:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:14,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:41:14,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:14,523 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 02:41:14,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:14,672 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 02:41:14,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1798160796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:14,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152907466] [2022-11-03 02:41:14,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:14,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:14,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:14,679 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:14,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:41:14,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:14,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:41:14,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:14,892 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 02:41:14,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:15,121 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 02:41:15,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152907466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:15,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:41:15,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 10] total 18 [2022-11-03 02:41:15,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407495858] [2022-11-03 02:41:15,123 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:41:15,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 02:41:15,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:15,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 02:41:15,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:41:15,124 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:15,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:15,483 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-11-03 02:41:15,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:41:15,483 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 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 12 [2022-11-03 02:41:15,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:15,484 INFO L225 Difference]: With dead ends: 39 [2022-11-03 02:41:15,484 INFO L226 Difference]: Without dead ends: 37 [2022-11-03 02:41:15,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:41:15,485 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 48 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:15,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 115 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 50 Invalid, 0 Unknown, 97 Unchecked, 0.1s Time] [2022-11-03 02:41:15,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-03 02:41:15,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2022-11-03 02:41:15,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:15,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-03 02:41:15,498 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 12 [2022-11-03 02:41:15,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:15,499 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-03 02:41:15,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:15,499 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-03 02:41:15,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:41:15,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:15,500 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:15,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:15,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2022-11-03 02:41:15,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:16,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:16,110 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:16,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:16,111 INFO L85 PathProgramCache]: Analyzing trace with hash -613961529, now seen corresponding path program 1 times [2022-11-03 02:41:16,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:16,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542834363] [2022-11-03 02:41:16,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:16,111 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:16,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:16,112 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:16,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:41:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:16,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:41:16,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:16,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:19,109 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:19,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542834363] [2022-11-03 02:41:19,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542834363] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:19,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1335908467] [2022-11-03 02:41:19,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:19,110 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:19,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:19,112 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:19,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-03 02:41:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:19,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:41:19,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:41:19,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:20,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1335908467] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:20,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021829174] [2022-11-03 02:41:20,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:20,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:20,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:20,436 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:20,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:41:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:20,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:41:20,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:41:20,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:21,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021829174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:21,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:41:21,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11, 12, 12, 13] total 35 [2022-11-03 02:41:21,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077486180] [2022-11-03 02:41:21,193 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:41:21,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 02:41:21,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:21,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 02:41:21,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:41:21,201 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 35 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 35 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 02:41:23,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:23,399 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2022-11-03 02:41:23,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 02:41:23,400 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 35 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) Word has length 19 [2022-11-03 02:41:23,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:23,402 INFO L225 Difference]: With dead ends: 57 [2022-11-03 02:41:23,402 INFO L226 Difference]: Without dead ends: 55 [2022-11-03 02:41:23,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=406, Invalid=2564, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 02:41:23,404 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 74 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 362 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:23,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 169 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 131 Invalid, 0 Unknown, 362 Unchecked, 0.2s Time] [2022-11-03 02:41:23,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-03 02:41:23,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 37. [2022-11-03 02:41:23,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:23,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-11-03 02:41:23,418 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 19 [2022-11-03 02:41:23,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:23,419 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-11-03 02:41:23,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 35 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 02:41:23,419 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-11-03 02:41:23,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:41:23,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:23,420 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:23,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2022-11-03 02:41:23,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:23,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:24,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:41:24,023 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:24,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:24,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1649680009, now seen corresponding path program 1 times [2022-11-03 02:41:24,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:24,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1224144261] [2022-11-03 02:41:24,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:24,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:24,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:24,025 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:24,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:41:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:24,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:41:24,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:24,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:24,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:24,425 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:24,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1224144261] [2022-11-03 02:41:24,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1224144261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:24,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [44465287] [2022-11-03 02:41:24,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:24,426 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:24,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:24,430 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:24,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-03 02:41:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:24,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:41:24,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:24,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:24,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [44465287] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:24,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126020427] [2022-11-03 02:41:24,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:24,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:24,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:24,762 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:24,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:41:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:24,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:41:24,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:24,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:24,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126020427] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:24,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:41:24,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 18 [2022-11-03 02:41:24,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860417729] [2022-11-03 02:41:24,940 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:41:24,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 02:41:24,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:24,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 02:41:24,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:41:24,942 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:25,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:25,130 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2022-11-03 02:41:25,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:41:25,134 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 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 19 [2022-11-03 02:41:25,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:25,135 INFO L225 Difference]: With dead ends: 88 [2022-11-03 02:41:25,135 INFO L226 Difference]: Without dead ends: 67 [2022-11-03 02:41:25,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:41:25,136 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:25,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 106 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-11-03 02:41:25,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-03 02:41:25,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2022-11-03 02:41:25,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:25,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-11-03 02:41:25,156 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 19 [2022-11-03 02:41:25,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:25,157 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-11-03 02:41:25,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:25,157 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-11-03 02:41:25,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:41:25,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:25,158 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:25,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:25,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:25,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:25,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:25,785 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:25,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:25,786 INFO L85 PathProgramCache]: Analyzing trace with hash -870279925, now seen corresponding path program 2 times [2022-11-03 02:41:25,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:25,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139662651] [2022-11-03 02:41:25,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:41:25,786 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:25,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:25,787 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:25,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:41:25,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:41:25,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:41:25,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:41:25,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:26,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:26,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:26,991 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:26,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139662651] [2022-11-03 02:41:26,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139662651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:26,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [733234103] [2022-11-03 02:41:26,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:41:26,995 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:26,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:26,998 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:27,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-03 02:41:27,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:41:27,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:41:27,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:41:27,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:27,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:27,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:27,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [733234103] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:27,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393285700] [2022-11-03 02:41:27,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:41:27,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:27,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:27,454 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:27,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 02:41:27,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:41:27,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:41:27,515 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 02:41:27,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:28,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:29,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393285700] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:29,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:41:29,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 16, 15] total 43 [2022-11-03 02:41:29,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290726257] [2022-11-03 02:41:29,455 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:41:29,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-03 02:41:29,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:29,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-03 02:41:29,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1502, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 02:41:29,457 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 43 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 43 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 02:41:30,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:30,527 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2022-11-03 02:41:30,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:41:30,528 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 43 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 02:41:30,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:30,530 INFO L225 Difference]: With dead ends: 90 [2022-11-03 02:41:30,530 INFO L226 Difference]: Without dead ends: 88 [2022-11-03 02:41:30,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=538, Invalid=2654, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 02:41:30,532 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:30,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 85 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 78 Unchecked, 0.0s Time] [2022-11-03 02:41:30,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-03 02:41:30,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2022-11-03 02:41:30,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.25) internal successors, (80), 64 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:30,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2022-11-03 02:41:30,554 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 19 [2022-11-03 02:41:30,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:30,554 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2022-11-03 02:41:30,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 43 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 02:41:30,554 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2022-11-03 02:41:30,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 02:41:30,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:30,555 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:30,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:30,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:30,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:31,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:31,156 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:31,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:31,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1055716415, now seen corresponding path program 2 times [2022-11-03 02:41:31,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:31,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [633732827] [2022-11-03 02:41:31,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:41:31,158 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:31,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:31,159 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:31,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:41:31,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:41:31,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:41:31,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:41:31,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:31,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:33,601 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:33,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [633732827] [2022-11-03 02:41:33,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [633732827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:33,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1612702462] [2022-11-03 02:41:33,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:41:33,602 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:33,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:33,603 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:33,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-03 02:41:33,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:41:33,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:41:33,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:41:33,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:41:34,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:41:36,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1612702462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:36,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509306430] [2022-11-03 02:41:36,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:41:36,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:36,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:36,090 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:36,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 02:41:36,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:41:36,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:41:36,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:41:36,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:41:36,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:37,104 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:37,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509306430] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:37,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:41:37,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13, 14, 11, 12] total 55 [2022-11-03 02:41:37,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075069171] [2022-11-03 02:41:37,105 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:41:37,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-03 02:41:37,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:37,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-03 02:41:37,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2765, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 02:41:37,114 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 55 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:40,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:40,914 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2022-11-03 02:41:40,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 02:41:40,914 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 55 states have internal predecessors, (114), 0 states have call successors, (0), 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 26 [2022-11-03 02:41:40,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:40,915 INFO L225 Difference]: With dead ends: 121 [2022-11-03 02:41:40,915 INFO L226 Difference]: Without dead ends: 100 [2022-11-03 02:41:40,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 97 SyntacticMatches, 14 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1941 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=834, Invalid=5172, Unknown=0, NotChecked=0, Total=6006 [2022-11-03 02:41:40,918 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 190 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 383 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:40,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 303 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 465 Invalid, 0 Unknown, 383 Unchecked, 0.5s Time] [2022-11-03 02:41:40,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-03 02:41:40,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 54. [2022-11-03 02:41:40,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 53 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 02:41:40,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-11-03 02:41:40,931 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 26 [2022-11-03 02:41:40,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:40,931 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-11-03 02:41:40,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 55 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:40,932 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-11-03 02:41:40,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 02:41:40,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:40,933 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-11-03 02:41:40,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2022-11-03 02:41:41,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:41,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:41,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:41,534 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:41,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:41,535 INFO L85 PathProgramCache]: Analyzing trace with hash 222853181, now seen corresponding path program 2 times [2022-11-03 02:41:41,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:41,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563305017] [2022-11-03 02:41:41,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:41:41,535 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:41,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:41,536 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:41,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:41:41,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:41:41,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:41:41,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 02:41:41,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:42,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:44,882 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:44,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563305017] [2022-11-03 02:41:44,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563305017] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:44,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [281194861] [2022-11-03 02:41:44,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:41:44,883 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:44,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:44,884 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:44,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-03 02:41:44,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:41:44,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:41:44,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 02:41:44,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:46,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:48,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [281194861] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:48,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903259508] [2022-11-03 02:41:48,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:41:48,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:48,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:48,150 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:48,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-03 02:41:48,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:41:48,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:41:48,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 02:41:48,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:48,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:49,162 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:49,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903259508] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:49,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:41:49,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 20, 20] total 59 [2022-11-03 02:41:49,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780199351] [2022-11-03 02:41:49,163 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:41:49,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-03 02:41:49,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:49,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-03 02:41:49,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=3149, Unknown=0, NotChecked=0, Total=3422 [2022-11-03 02:41:49,165 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 59 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 59 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:53,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:53,807 INFO L93 Difference]: Finished difference Result 118 states and 141 transitions. [2022-11-03 02:41:53,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-03 02:41:53,808 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 59 states have internal predecessors, (85), 0 states have call successors, (0), 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 26 [2022-11-03 02:41:53,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:53,809 INFO L225 Difference]: With dead ends: 118 [2022-11-03 02:41:53,809 INFO L226 Difference]: Without dead ends: 116 [2022-11-03 02:41:53,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2054 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=820, Invalid=7736, Unknown=0, NotChecked=0, Total=8556 [2022-11-03 02:41:53,812 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 140 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 389 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:53,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 368 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 279 Invalid, 0 Unknown, 389 Unchecked, 0.3s Time] [2022-11-03 02:41:53,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-03 02:41:53,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 88. [2022-11-03 02:41:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.2183908045977012) internal successors, (106), 87 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:53,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2022-11-03 02:41:53,856 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 26 [2022-11-03 02:41:53,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:53,858 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2022-11-03 02:41:53,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 59 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:53,859 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2022-11-03 02:41:53,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 02:41:53,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:53,865 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1] [2022-11-03 02:41:53,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:54,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:54,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:54,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:41:54,468 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:54,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:54,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1977882169, now seen corresponding path program 3 times [2022-11-03 02:41:54,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:54,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1937618162] [2022-11-03 02:41:54,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:41:54,469 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:54,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:54,470 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:54,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 02:41:54,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 02:41:54,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:41:54,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-03 02:41:54,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:41:55,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:58,848 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:58,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1937618162] [2022-11-03 02:41:58,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1937618162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:58,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [700774216] [2022-11-03 02:41:58,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:41:58,849 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:58,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:58,857 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:58,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-03 02:41:58,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 02:41:58,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:41:58,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-03 02:41:58,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:41:59,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:59,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [700774216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:59,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778553126] [2022-11-03 02:41:59,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:41:59,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:59,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:59,765 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:59,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-03 02:41:59,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 02:41:59,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:41:59,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-03 02:41:59,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:00,184 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:42:00,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:00,608 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:42:00,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778553126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:00,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:42:00,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 21, 22, 21, 22] total 41 [2022-11-03 02:42:00,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316523496] [2022-11-03 02:42:00,609 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:42:00,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-03 02:42:00,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:00,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-03 02:42:00,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1504, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 02:42:00,611 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 41 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 02:42:10,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:10,602 INFO L93 Difference]: Finished difference Result 223 states and 271 transitions. [2022-11-03 02:42:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-03 02:42:10,603 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 41 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) Word has length 33 [2022-11-03 02:42:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:10,604 INFO L225 Difference]: With dead ends: 223 [2022-11-03 02:42:10,604 INFO L226 Difference]: Without dead ends: 221 [2022-11-03 02:42:10,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 153 SyntacticMatches, 6 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1698 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=841, Invalid=8089, Unknown=0, NotChecked=0, Total=8930 [2022-11-03 02:42:10,607 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 143 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 936 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:10,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 421 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 254 Invalid, 0 Unknown, 936 Unchecked, 0.3s Time] [2022-11-03 02:42:10,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-11-03 02:42:10,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 146. [2022-11-03 02:42:10,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.2551724137931035) internal successors, (182), 145 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:10,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 182 transitions. [2022-11-03 02:42:10,640 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 182 transitions. Word has length 33 [2022-11-03 02:42:10,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:10,640 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 182 transitions. [2022-11-03 02:42:10,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 41 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 02:42:10,641 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 182 transitions. [2022-11-03 02:42:10,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 02:42:10,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:10,642 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1] [2022-11-03 02:42:10,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:10,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:11,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:11,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:42:11,258 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:11,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:11,259 INFO L85 PathProgramCache]: Analyzing trace with hash 566101771, now seen corresponding path program 4 times [2022-11-03 02:42:11,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:11,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782600741] [2022-11-03 02:42:11,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:42:11,259 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:11,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:11,260 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:11,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 02:42:11,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:42:11,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:42:11,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 02:42:11,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:42:12,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:42:15,798 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:15,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782600741] [2022-11-03 02:42:15,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782600741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:15,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1449965670] [2022-11-03 02:42:15,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:42:15,798 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:42:15,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:42:15,799 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:42:15,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-03 02:42:15,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:42:15,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:42:15,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-03 02:42:15,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:42:17,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:42:19,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1449965670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:19,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990568541] [2022-11-03 02:42:19,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:42:19,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:19,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:19,510 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:19,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-03 02:42:19,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:42:19,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:42:19,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 02:42:19,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:20,124 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:42:20,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:42:20,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990568541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:20,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:42:20,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 20, 21, 21, 22] total 64 [2022-11-03 02:42:20,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014383424] [2022-11-03 02:42:20,933 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:42:20,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-03 02:42:20,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:20,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-03 02:42:20,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=3732, Unknown=0, NotChecked=0, Total=4032 [2022-11-03 02:42:20,935 INFO L87 Difference]: Start difference. First operand 146 states and 182 transitions. Second operand has 64 states, 64 states have (on average 1.578125) internal successors, (101), 64 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:32,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:32,136 INFO L93 Difference]: Finished difference Result 387 states and 484 transitions. [2022-11-03 02:42:32,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-03 02:42:32,136 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.578125) internal successors, (101), 64 states have internal predecessors, (101), 0 states have call successors, (0), 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 33 [2022-11-03 02:42:32,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:32,138 INFO L225 Difference]: With dead ends: 387 [2022-11-03 02:42:32,138 INFO L226 Difference]: Without dead ends: 385 [2022-11-03 02:42:32,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 129 SyntacticMatches, 7 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3625 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=1315, Invalid=12491, Unknown=0, NotChecked=0, Total=13806 [2022-11-03 02:42:32,142 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 131 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 890 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:32,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 431 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 456 Invalid, 0 Unknown, 890 Unchecked, 0.4s Time] [2022-11-03 02:42:32,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-03 02:42:32,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 255. [2022-11-03 02:42:32,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.2598425196850394) internal successors, (320), 254 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:32,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 320 transitions. [2022-11-03 02:42:32,190 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 320 transitions. Word has length 33 [2022-11-03 02:42:32,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:32,191 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 320 transitions. [2022-11-03 02:42:32,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.578125) internal successors, (101), 64 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:32,191 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 320 transitions. [2022-11-03 02:42:32,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 02:42:32,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:32,192 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:32,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:32,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:32,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:32,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:32,793 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:32,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:32,794 INFO L85 PathProgramCache]: Analyzing trace with hash 738203589, now seen corresponding path program 3 times [2022-11-03 02:42:32,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:32,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93336747] [2022-11-03 02:42:32,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:42:32,795 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:32,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:32,796 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:32,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 02:42:32,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:42:32,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:42:32,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:42:32,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:42:33,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:33,748 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:42:33,748 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:33,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93336747] [2022-11-03 02:42:33,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93336747] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:33,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1923473655] [2022-11-03 02:42:33,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:42:33,749 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:42:33,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:42:33,750 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:42:33,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-03 02:42:33,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:42:33,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:42:33,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:42:33,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:42:34,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:42:34,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1923473655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:34,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165564684] [2022-11-03 02:42:34,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:42:34,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:34,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:34,317 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:34,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-03 02:42:34,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:42:34,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:42:34,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:42:34,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:34,775 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:42:34,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:35,432 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:42:35,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165564684] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:35,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:42:35,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 9] total 28 [2022-11-03 02:42:35,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395474681] [2022-11-03 02:42:35,435 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:42:35,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:42:35,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:35,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:42:35,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:42:35,438 INFO L87 Difference]: Start difference. First operand 255 states and 320 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 28 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 02:42:35,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:35,923 INFO L93 Difference]: Finished difference Result 281 states and 351 transitions. [2022-11-03 02:42:35,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:42:35,924 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-03 02:42:35,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:35,925 INFO L225 Difference]: With dead ends: 281 [2022-11-03 02:42:35,925 INFO L226 Difference]: Without dead ends: 279 [2022-11-03 02:42:35,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=308, Invalid=1252, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:42:35,926 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 66 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:35,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 64 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2022-11-03 02:42:35,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-11-03 02:42:35,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 257. [2022-11-03 02:42:35,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.26171875) internal successors, (323), 256 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:35,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 323 transitions. [2022-11-03 02:42:35,981 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 323 transitions. Word has length 33 [2022-11-03 02:42:35,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:35,982 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 323 transitions. [2022-11-03 02:42:35,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 28 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 02:42:35,982 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 323 transitions. [2022-11-03 02:42:35,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 02:42:35,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:35,983 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1] [2022-11-03 02:42:36,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:36,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-03 02:42:36,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2022-11-03 02:42:36,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:42:36,602 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:36,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:36,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1781756345, now seen corresponding path program 5 times [2022-11-03 02:42:36,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:36,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221869186] [2022-11-03 02:42:36,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 02:42:36,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:36,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:36,604 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:36,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 02:42:36,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-03 02:42:36,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:42:36,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 02:42:36,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:37,689 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:42:37,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:42:40,845 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:40,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221869186] [2022-11-03 02:42:40,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221869186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:40,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1041349543] [2022-11-03 02:42:40,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 02:42:40,846 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:42:40,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:42:40,847 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:42:40,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-03 02:42:40,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-03 02:42:40,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:42:40,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 02:42:40,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:42:43,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:44,765 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:42:44,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1041349543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:44,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535994890] [2022-11-03 02:42:44,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 02:42:44,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:44,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:44,766 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:44,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-03 02:42:44,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-03 02:42:44,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:42:44,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 02:42:44,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:42:45,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:42:46,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535994890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:46,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:42:46,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 20, 21, 21, 22] total 66 [2022-11-03 02:42:46,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909464545] [2022-11-03 02:42:46,573 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:42:46,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-03 02:42:46,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:46,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-03 02:42:46,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=3971, Unknown=0, NotChecked=0, Total=4290 [2022-11-03 02:42:46,575 INFO L87 Difference]: Start difference. First operand 257 states and 323 transitions. Second operand has 66 states, 66 states have (on average 1.5909090909090908) internal successors, (105), 66 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:01,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:01,046 INFO L93 Difference]: Finished difference Result 450 states and 565 transitions. [2022-11-03 02:43:01,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-03 02:43:01,046 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.5909090909090908) internal successors, (105), 66 states have internal predecessors, (105), 0 states have call successors, (0), 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 33 [2022-11-03 02:43:01,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:01,048 INFO L225 Difference]: With dead ends: 450 [2022-11-03 02:43:01,048 INFO L226 Difference]: Without dead ends: 448 [2022-11-03 02:43:01,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 123 SyntacticMatches, 8 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4712 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=1773, Invalid=15783, Unknown=0, NotChecked=0, Total=17556 [2022-11-03 02:43:01,051 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 186 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 977 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:01,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 359 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 587 Invalid, 0 Unknown, 977 Unchecked, 0.6s Time] [2022-11-03 02:43:01,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-03 02:43:01,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 308. [2022-11-03 02:43:01,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.267100977198697) internal successors, (389), 307 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:01,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 389 transitions. [2022-11-03 02:43:01,115 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 389 transitions. Word has length 33 [2022-11-03 02:43:01,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:01,116 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 389 transitions. [2022-11-03 02:43:01,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.5909090909090908) internal successors, (105), 66 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:01,116 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 389 transitions. [2022-11-03 02:43:01,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 02:43:01,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:01,117 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:01,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:01,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:01,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:01,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:01,718 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:01,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:01,718 INFO L85 PathProgramCache]: Analyzing trace with hash 481885193, now seen corresponding path program 4 times [2022-11-03 02:43:01,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:01,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [458465076] [2022-11-03 02:43:01,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:43:01,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:01,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:01,719 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:01,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 02:43:01,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:43:01,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:43:01,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:43:01,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:02,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:03,824 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:03,825 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:03,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [458465076] [2022-11-03 02:43:03,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [458465076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:03,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2094341639] [2022-11-03 02:43:03,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:43:03,825 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:03,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:43:03,826 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:43:03,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-03 02:43:03,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:43:03,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:43:03,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 02:43:03,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:05,393 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:05,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:06,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2094341639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:06,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718984033] [2022-11-03 02:43:06,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:43:06,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:06,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:06,131 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:06,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-03 02:43:06,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:43:06,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:43:06,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:43:06,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:43:06,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:43:06,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718984033] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:06,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:43:06,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 6, 6] total 60 [2022-11-03 02:43:06,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931391283] [2022-11-03 02:43:06,741 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:43:06,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-03 02:43:06,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:06,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-03 02:43:06,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=3270, Unknown=0, NotChecked=0, Total=3540 [2022-11-03 02:43:06,743 INFO L87 Difference]: Start difference. First operand 308 states and 389 transitions. Second operand has 60 states, 60 states have (on average 1.85) internal successors, (111), 60 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:15,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:15,789 INFO L93 Difference]: Finished difference Result 361 states and 449 transitions. [2022-11-03 02:43:15,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-03 02:43:15,789 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.85) internal successors, (111), 60 states have internal predecessors, (111), 0 states have call successors, (0), 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 33 [2022-11-03 02:43:15,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:15,790 INFO L225 Difference]: With dead ends: 361 [2022-11-03 02:43:15,790 INFO L226 Difference]: Without dead ends: 254 [2022-11-03 02:43:15,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3383 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=1878, Invalid=11462, Unknown=0, NotChecked=0, Total=13340 [2022-11-03 02:43:15,793 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 208 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:15,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 139 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1014 Invalid, 0 Unknown, 205 Unchecked, 1.1s Time] [2022-11-03 02:43:15,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-11-03 02:43:15,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 173. [2022-11-03 02:43:15,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.1511627906976745) internal successors, (198), 172 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:15,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 198 transitions. [2022-11-03 02:43:15,828 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 198 transitions. Word has length 33 [2022-11-03 02:43:15,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:15,828 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 198 transitions. [2022-11-03 02:43:15,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.85) internal successors, (111), 60 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:15,828 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 198 transitions. [2022-11-03 02:43:15,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 02:43:15,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:15,829 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1] [2022-11-03 02:43:15,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:16,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:16,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:16,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:16,438 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:16,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:16,438 INFO L85 PathProgramCache]: Analyzing trace with hash -2051299775, now seen corresponding path program 6 times [2022-11-03 02:43:16,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:16,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806657507] [2022-11-03 02:43:16,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 02:43:16,439 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:16,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:16,440 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:16,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 02:43:16,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-03 02:43:16,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:43:16,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-03 02:43:16,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:43:17,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:22,266 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:43:22,266 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:22,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806657507] [2022-11-03 02:43:22,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806657507] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:22,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [330985389] [2022-11-03 02:43:22,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 02:43:22,266 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:22,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:43:22,267 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:43:22,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-03 02:43:22,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-03 02:43:22,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:43:22,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-03 02:43:22,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:43:24,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:43:26,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [330985389] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:26,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575990435] [2022-11-03 02:43:26,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 02:43:26,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:26,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:26,565 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:26,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-03 02:43:26,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-03 02:43:26,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:43:26,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-03 02:43:26,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:27,340 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 73 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:43:27,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:28,293 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:43:28,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575990435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:28,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:43:28,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 22, 24, 23, 25] total 70 [2022-11-03 02:43:28,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827067359] [2022-11-03 02:43:28,294 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:43:28,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-03 02:43:28,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:28,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-03 02:43:28,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=4495, Unknown=0, NotChecked=0, Total=4830 [2022-11-03 02:43:28,296 INFO L87 Difference]: Start difference. First operand 173 states and 198 transitions. Second operand has 70 states, 70 states have (on average 1.7142857142857142) internal successors, (120), 70 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:41,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:41,652 INFO L93 Difference]: Finished difference Result 364 states and 414 transitions. [2022-11-03 02:43:41,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-03 02:43:41,653 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.7142857142857142) internal successors, (120), 70 states have internal predecessors, (120), 0 states have call successors, (0), 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 40 [2022-11-03 02:43:41,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:41,654 INFO L225 Difference]: With dead ends: 364 [2022-11-03 02:43:41,654 INFO L226 Difference]: Without dead ends: 362 [2022-11-03 02:43:41,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 163 SyntacticMatches, 11 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4700 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=1713, Invalid=15579, Unknown=0, NotChecked=0, Total=17292 [2022-11-03 02:43:41,656 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 176 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 895 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:41,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 204 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 591 Invalid, 0 Unknown, 895 Unchecked, 0.5s Time] [2022-11-03 02:43:41,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-11-03 02:43:41,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 173. [2022-11-03 02:43:41,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.1569767441860466) internal successors, (199), 172 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:41,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 199 transitions. [2022-11-03 02:43:41,699 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 199 transitions. Word has length 40 [2022-11-03 02:43:41,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:41,700 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 199 transitions. [2022-11-03 02:43:41,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.7142857142857142) internal successors, (120), 70 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:41,701 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 199 transitions. [2022-11-03 02:43:41,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 02:43:41,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:41,702 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1] [2022-11-03 02:43:41,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:41,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-11-03 02:43:42,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:42,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:42,304 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:42,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:42,305 INFO L85 PathProgramCache]: Analyzing trace with hash -104190595, now seen corresponding path program 7 times [2022-11-03 02:43:42,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:42,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162402451] [2022-11-03 02:43:42,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:43:42,305 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:42,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:42,306 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:42,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 02:43:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:42,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-03 02:43:42,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:43:43,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:43:47,547 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:47,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162402451] [2022-11-03 02:43:47,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162402451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:47,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1546296010] [2022-11-03 02:43:47,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:43:47,548 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:47,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:43:47,549 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:43:47,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-03 02:43:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:47,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-03 02:43:47,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:48,150 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:43:48,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:43:48,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1546296010] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:48,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378451981] [2022-11-03 02:43:48,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:43:48,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:48,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:48,818 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:48,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-03 02:43:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:48,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-03 02:43:48,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:49,501 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:43:49,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:43:50,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378451981] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:50,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:43:50,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 22, 24, 23, 25] total 46 [2022-11-03 02:43:50,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084114046] [2022-11-03 02:43:50,327 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:43:50,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-03 02:43:50,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:50,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-03 02:43:50,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1906, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 02:43:50,329 INFO L87 Difference]: Start difference. First operand 173 states and 199 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 46 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:04,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:04,417 INFO L93 Difference]: Finished difference Result 356 states and 406 transitions. [2022-11-03 02:44:04,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-03 02:44:04,418 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 46 states have internal predecessors, (77), 0 states have call successors, (0), 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 40 [2022-11-03 02:44:04,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:04,419 INFO L225 Difference]: With dead ends: 356 [2022-11-03 02:44:04,419 INFO L226 Difference]: Without dead ends: 354 [2022-11-03 02:44:04,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 183 SyntacticMatches, 11 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2491 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=1403, Invalid=10587, Unknown=0, NotChecked=0, Total=11990 [2022-11-03 02:44:04,421 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 142 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 695 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:04,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 189 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 372 Invalid, 0 Unknown, 695 Unchecked, 0.3s Time] [2022-11-03 02:44:04,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-03 02:44:04,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 177. [2022-11-03 02:44:04,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.1534090909090908) internal successors, (203), 176 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:04,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 203 transitions. [2022-11-03 02:44:04,489 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 203 transitions. Word has length 40 [2022-11-03 02:44:04,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:04,489 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 203 transitions. [2022-11-03 02:44:04,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 46 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:04,490 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 203 transitions. [2022-11-03 02:44:04,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 02:44:04,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:04,490 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1] [2022-11-03 02:44:04,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:04,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:04,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2022-11-03 02:44:05,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:44:05,102 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:05,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:05,103 INFO L85 PathProgramCache]: Analyzing trace with hash 30235577, now seen corresponding path program 8 times [2022-11-03 02:44:05,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:05,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249477588] [2022-11-03 02:44:05,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:44:05,103 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:05,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:05,104 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:05,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 02:44:05,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:44:05,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:44:05,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-03 02:44:05,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:44:06,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:44:10,742 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:10,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249477588] [2022-11-03 02:44:10,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249477588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:10,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1176355880] [2022-11-03 02:44:10,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:44:10,742 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:44:10,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:44:10,743 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:44:10,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-03 02:44:10,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:44:10,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:44:10,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-03 02:44:10,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:13,486 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:44:13,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:44:15,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1176355880] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:15,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011201998] [2022-11-03 02:44:15,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:44:15,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:44:15,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:44:15,493 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:44:15,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-03 02:44:15,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:44:15,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:44:15,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-03 02:44:15,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:44:16,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:44:17,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011201998] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:17,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:44:17,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 21, 23, 22, 24] total 69 [2022-11-03 02:44:17,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343633695] [2022-11-03 02:44:17,553 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:44:17,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-03 02:44:17,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:17,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-03 02:44:17,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=4363, Unknown=0, NotChecked=0, Total=4692 [2022-11-03 02:44:17,555 INFO L87 Difference]: Start difference. First operand 177 states and 203 transitions. Second operand has 69 states, 69 states have (on average 1.6956521739130435) internal successors, (117), 69 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:30,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:30,008 INFO L93 Difference]: Finished difference Result 426 states and 486 transitions. [2022-11-03 02:44:30,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-03 02:44:30,009 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.6956521739130435) internal successors, (117), 69 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-03 02:44:30,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:30,010 INFO L225 Difference]: With dead ends: 426 [2022-11-03 02:44:30,011 INFO L226 Difference]: Without dead ends: 424 [2022-11-03 02:44:30,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 160 SyntacticMatches, 16 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4316 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=1558, Invalid=13942, Unknown=0, NotChecked=0, Total=15500 [2022-11-03 02:44:30,012 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 163 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 683 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:30,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 182 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 558 Invalid, 0 Unknown, 683 Unchecked, 0.5s Time] [2022-11-03 02:44:30,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-11-03 02:44:30,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 232. [2022-11-03 02:44:30,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.1515151515151516) internal successors, (266), 231 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:30,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 266 transitions. [2022-11-03 02:44:30,098 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 266 transitions. Word has length 40 [2022-11-03 02:44:30,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:30,099 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 266 transitions. [2022-11-03 02:44:30,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.6956521739130435) internal successors, (117), 69 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:30,099 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 266 transitions. [2022-11-03 02:44:30,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 02:44:30,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:30,100 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1] [2022-11-03 02:44:30,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:30,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:30,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:30,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:44:30,712 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:30,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:30,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1536054211, now seen corresponding path program 9 times [2022-11-03 02:44:30,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:30,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545561912] [2022-11-03 02:44:30,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:44:30,714 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:30,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:30,715 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:30,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 02:44:30,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-03 02:44:30,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:44:30,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-03 02:44:30,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:44:32,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:37,882 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:44:37,883 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:37,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1545561912] [2022-11-03 02:44:37,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1545561912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:37,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1877052692] [2022-11-03 02:44:37,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:44:37,883 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:44:37,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:44:37,884 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:44:37,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-03 02:44:38,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-03 02:44:38,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:44:38,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 02:44:38,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:44:41,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:44:43,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1877052692] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:43,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352290169] [2022-11-03 02:44:43,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:44:43,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:44:43,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:44:43,092 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:44:43,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-03 02:44:43,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-03 02:44:43,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:44:43,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 02:44:43,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:44:43,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:44:44,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352290169] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:44,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:44:44,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 23, 26, 23, 26] total 73 [2022-11-03 02:44:44,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684844747] [2022-11-03 02:44:44,912 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:44:44,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-03 02:44:44,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:44,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-03 02:44:44,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=4908, Unknown=0, NotChecked=0, Total=5256 [2022-11-03 02:44:44,914 INFO L87 Difference]: Start difference. First operand 232 states and 266 transitions. Second operand has 73 states, 73 states have (on average 1.8082191780821917) internal successors, (132), 73 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:00,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:00,709 INFO L93 Difference]: Finished difference Result 377 states and 427 transitions. [2022-11-03 02:45:00,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-03 02:45:00,709 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.8082191780821917) internal successors, (132), 73 states have internal predecessors, (132), 0 states have call successors, (0), 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 47 [2022-11-03 02:45:00,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:00,710 INFO L225 Difference]: With dead ends: 377 [2022-11-03 02:45:00,710 INFO L226 Difference]: Without dead ends: 375 [2022-11-03 02:45:00,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 198 SyntacticMatches, 18 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4453 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=1708, Invalid=14548, Unknown=0, NotChecked=0, Total=16256 [2022-11-03 02:45:00,712 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 198 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 967 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:00,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 163 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 680 Invalid, 0 Unknown, 967 Unchecked, 0.6s Time] [2022-11-03 02:45:00,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-11-03 02:45:00,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 63. [2022-11-03 02:45:00,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 62 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:00,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2022-11-03 02:45:00,752 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 47 [2022-11-03 02:45:00,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:00,752 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2022-11-03 02:45:00,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.8082191780821917) internal successors, (132), 73 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:00,752 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2022-11-03 02:45:00,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 02:45:00,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:00,753 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1] [2022-11-03 02:45:00,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:00,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:01,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:01,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:01,354 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:01,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:01,354 INFO L85 PathProgramCache]: Analyzing trace with hash 265026877, now seen corresponding path program 3 times [2022-11-03 02:45:01,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:45:01,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783457731] [2022-11-03 02:45:01,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:45:01,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:45:01,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:45:01,356 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:45:01,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 02:45:01,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-03 02:45:01,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:45:01,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-03 02:45:01,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:04,968 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:04,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:19,448 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:45:19,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783457731] [2022-11-03 02:45:19,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783457731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:19,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [493745440] [2022-11-03 02:45:19,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:45:19,449 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:45:19,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:45:19,450 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:45:19,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-03 02:45:19,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-03 02:45:19,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:45:19,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-03 02:45:19,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:20,366 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:20,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:21,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [493745440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:21,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489949762] [2022-11-03 02:45:21,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:45:21,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:21,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:21,216 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:21,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-03 02:45:21,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-03 02:45:21,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:45:21,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-03 02:45:21,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:22,066 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:22,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:22,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489949762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:22,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:45:22,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39, 39, 39, 39] total 76 [2022-11-03 02:45:22,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625128038] [2022-11-03 02:45:22,924 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:45:22,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-03 02:45:22,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:45:22,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-03 02:45:22,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=5306, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 02:45:22,926 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 76 states, 76 states have (on average 1.394736842105263) internal successors, (106), 76 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:52,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:52,788 INFO L93 Difference]: Finished difference Result 190 states and 217 transitions. [2022-11-03 02:45:52,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-11-03 02:45:52,788 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.394736842105263) internal successors, (106), 76 states have internal predecessors, (106), 0 states have call successors, (0), 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 54 [2022-11-03 02:45:52,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:52,788 INFO L225 Difference]: With dead ends: 190 [2022-11-03 02:45:52,788 INFO L226 Difference]: Without dead ends: 188 [2022-11-03 02:45:52,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 248 SyntacticMatches, 3 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4110 ImplicationChecksByTransitivity, 45.6s TimeCoverageRelationStatistics Valid=2326, Invalid=22166, Unknown=0, NotChecked=0, Total=24492 [2022-11-03 02:45:52,790 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 413 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 2149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1250 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:52,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 515 Invalid, 2149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 872 Invalid, 0 Unknown, 1250 Unchecked, 1.0s Time] [2022-11-03 02:45:52,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-03 02:45:52,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 153. [2022-11-03 02:45:52,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.144736842105263) internal successors, (174), 152 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:52,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 174 transitions. [2022-11-03 02:45:52,864 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 174 transitions. Word has length 54 [2022-11-03 02:45:52,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:52,865 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 174 transitions. [2022-11-03 02:45:52,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.394736842105263) internal successors, (106), 76 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:52,865 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 174 transitions. [2022-11-03 02:45:52,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 02:45:52,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:52,866 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1] [2022-11-03 02:45:52,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:53,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:53,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:53,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:53,466 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:53,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:53,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1796021191, now seen corresponding path program 10 times [2022-11-03 02:45:53,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:45:53,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144798415] [2022-11-03 02:45:53,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:45:53,468 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:45:53,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:45:53,468 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:45:53,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 02:45:53,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:45:53,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:45:53,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-03 02:45:53,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:45:57,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:14,482 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:46:14,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144798415] [2022-11-03 02:46:14,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144798415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:14,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [500060778] [2022-11-03 02:46:14,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:46:14,483 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:46:14,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:46:14,491 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:46:14,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-03 02:46:14,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:46:14,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:46:14,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-03 02:46:14,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:46:15,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:16,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [500060778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:16,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374092094] [2022-11-03 02:46:16,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:46:16,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:16,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:16,485 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:16,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-03 02:46:16,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:46:16,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:46:16,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-03 02:46:16,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:46:17,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:19,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374092094] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:19,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:46:19,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 41, 42, 42, 43] total 83 [2022-11-03 02:46:19,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107169361] [2022-11-03 02:46:19,121 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:46:19,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-03 02:46:19,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:46:19,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-03 02:46:19,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=6357, Unknown=0, NotChecked=0, Total=6806 [2022-11-03 02:46:19,123 INFO L87 Difference]: Start difference. First operand 153 states and 174 transitions. Second operand has 83 states, 83 states have (on average 1.4698795180722892) internal successors, (122), 83 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:17,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:17,385 INFO L93 Difference]: Finished difference Result 462 states and 523 transitions. [2022-11-03 02:47:17,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-11-03 02:47:17,385 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.4698795180722892) internal successors, (122), 83 states have internal predecessors, (122), 0 states have call successors, (0), 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 61 [2022-11-03 02:47:17,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:17,386 INFO L225 Difference]: With dead ends: 462 [2022-11-03 02:47:17,386 INFO L226 Difference]: Without dead ends: 460 [2022-11-03 02:47:17,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 287 SyntacticMatches, 5 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7663 ImplicationChecksByTransitivity, 77.3s TimeCoverageRelationStatistics Valid=3242, Invalid=36160, Unknown=0, NotChecked=0, Total=39402 [2022-11-03 02:47:17,388 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 291 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 3201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2365 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:17,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 773 Invalid, 3201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 802 Invalid, 0 Unknown, 2365 Unchecked, 1.0s Time] [2022-11-03 02:47:17,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-11-03 02:47:17,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 319. [2022-11-03 02:47:17,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.1540880503144655) internal successors, (367), 318 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:17,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 367 transitions. [2022-11-03 02:47:17,537 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 367 transitions. Word has length 61 [2022-11-03 02:47:17,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:17,537 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 367 transitions. [2022-11-03 02:47:17,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.4698795180722892) internal successors, (122), 83 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:17,537 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 367 transitions. [2022-11-03 02:47:17,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 02:47:17,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:17,538 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1] [2022-11-03 02:47:17,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:17,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-11-03 02:47:17,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-11-03 02:47:18,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:18,141 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:18,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:18,141 INFO L85 PathProgramCache]: Analyzing trace with hash 566913803, now seen corresponding path program 11 times [2022-11-03 02:47:18,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:47:18,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927702841] [2022-11-03 02:47:18,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 02:47:18,142 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:47:18,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:47:18,143 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:47:18,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-03 02:47:18,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-03 02:47:18,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:18,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-03 02:47:18,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:21,908 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:47:21,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:47:38,274 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:47:38,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927702841] [2022-11-03 02:47:38,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927702841] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:38,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [546818190] [2022-11-03 02:47:38,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 02:47:38,274 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:47:38,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:47:38,275 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:47:38,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-03 02:47:38,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-03 02:47:38,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:38,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-03 02:47:38,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:39,569 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:47:39,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:41,660 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:47:41,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [546818190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:41,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694013098] [2022-11-03 02:47:41,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 02:47:41,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:41,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:41,662 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:41,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-03 02:47:41,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-03 02:47:41,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:41,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-03 02:47:41,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:47:42,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:44,900 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:47:44,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694013098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:44,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:47:44,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 41, 42, 41, 42] total 83 [2022-11-03 02:47:44,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583955496] [2022-11-03 02:47:44,901 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:47:44,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-03 02:47:44,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:47:44,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-03 02:47:44,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=6347, Unknown=0, NotChecked=0, Total=6806 [2022-11-03 02:47:44,903 INFO L87 Difference]: Start difference. First operand 319 states and 367 transitions. Second operand has 83 states, 83 states have (on average 1.5060240963855422) internal successors, (125), 83 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:45,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:45,100 INFO L93 Difference]: Finished difference Result 856 states and 981 transitions. [2022-11-03 02:48:45,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-11-03 02:48:45,100 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.5060240963855422) internal successors, (125), 83 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-03 02:48:45,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:45,102 INFO L225 Difference]: With dead ends: 856 [2022-11-03 02:48:45,102 INFO L226 Difference]: Without dead ends: 854 [2022-11-03 02:48:45,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 276 SyntacticMatches, 9 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8366 ImplicationChecksByTransitivity, 79.5s TimeCoverageRelationStatistics Valid=3458, Invalid=38362, Unknown=0, NotChecked=0, Total=41820 [2022-11-03 02:48:45,105 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 229 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 3268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1966 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:45,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 822 Invalid, 3268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1282 Invalid, 0 Unknown, 1966 Unchecked, 1.5s Time] [2022-11-03 02:48:45,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-11-03 02:48:45,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 578. [2022-11-03 02:48:45,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 1.1542461005199307) internal successors, (666), 577 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:45,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 666 transitions. [2022-11-03 02:48:45,524 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 666 transitions. Word has length 61 [2022-11-03 02:48:45,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:45,524 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 666 transitions. [2022-11-03 02:48:45,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.5060240963855422) internal successors, (125), 83 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:45,524 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 666 transitions. [2022-11-03 02:48:45,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 02:48:45,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:45,526 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1] [2022-11-03 02:48:45,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:45,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:45,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:46,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:48:46,130 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:46,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:46,131 INFO L85 PathProgramCache]: Analyzing trace with hash -451805113, now seen corresponding path program 12 times [2022-11-03 02:48:46,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:46,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842804652] [2022-11-03 02:48:46,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 02:48:46,131 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:46,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:46,132 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:46,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 02:48:46,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-03 02:48:46,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:46,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-03 02:48:46,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:48:49,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:49:06,440 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:06,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842804652] [2022-11-03 02:49:06,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842804652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:06,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1666100595] [2022-11-03 02:49:06,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 02:49:06,441 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:49:06,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:49:06,442 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:49:06,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-03 02:49:06,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-03 02:49:06,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:49:06,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-03 02:49:06,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:49:07,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:49:08,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1666100595] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:08,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318819382] [2022-11-03 02:49:08,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 02:49:08,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:08,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:08,950 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:08,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-03 02:49:09,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-03 02:49:09,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:49:09,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-03 02:49:09,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:49:10,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:49:12,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318819382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:12,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:49:12,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 40, 41, 41, 42] total 81 [2022-11-03 02:49:12,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145496138] [2022-11-03 02:49:12,079 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:49:12,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-03 02:49:12,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:12,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-03 02:49:12,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=6048, Unknown=0, NotChecked=0, Total=6480 [2022-11-03 02:49:12,080 INFO L87 Difference]: Start difference. First operand 578 states and 666 transitions. Second operand has 81 states, 81 states have (on average 1.4938271604938271) internal successors, (121), 81 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:10,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:10,321 INFO L93 Difference]: Finished difference Result 920 states and 1057 transitions. [2022-11-03 02:50:10,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-11-03 02:50:10,322 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.4938271604938271) internal successors, (121), 81 states have internal predecessors, (121), 0 states have call successors, (0), 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 61 [2022-11-03 02:50:10,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:10,324 INFO L225 Difference]: With dead ends: 920 [2022-11-03 02:50:10,324 INFO L226 Difference]: Without dead ends: 918 [2022-11-03 02:50:10,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 282 SyntacticMatches, 10 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7986 ImplicationChecksByTransitivity, 76.8s TimeCoverageRelationStatistics Valid=3442, Invalid=36358, Unknown=0, NotChecked=0, Total=39800 [2022-11-03 02:50:10,328 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 229 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 2645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1394 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:10,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 624 Invalid, 2645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1221 Invalid, 0 Unknown, 1394 Unchecked, 1.5s Time] [2022-11-03 02:50:10,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2022-11-03 02:50:10,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 682. [2022-11-03 02:50:10,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 1.155653450807636) internal successors, (787), 681 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:10,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 787 transitions. [2022-11-03 02:50:10,687 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 787 transitions. Word has length 61 [2022-11-03 02:50:10,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:10,687 INFO L495 AbstractCegarLoop]: Abstraction has 682 states and 787 transitions. [2022-11-03 02:50:10,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.4938271604938271) internal successors, (121), 81 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:10,688 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 787 transitions. [2022-11-03 02:50:10,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 02:50:10,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:10,689 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1] [2022-11-03 02:50:10,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:10,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:11,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:11,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:50:11,298 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:11,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:11,298 INFO L85 PathProgramCache]: Analyzing trace with hash 909655241, now seen corresponding path program 13 times [2022-11-03 02:50:11,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:11,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384334305] [2022-11-03 02:50:11,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:50:11,299 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:11,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:11,300 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:11,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-03 02:50:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:11,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-03 02:50:11,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 197 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:50:14,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:50:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:50:26,644 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:26,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384334305] [2022-11-03 02:50:26,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384334305] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:50:26,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1187981202] [2022-11-03 02:50:26,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:50:26,645 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:50:26,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:50:26,651 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:50:26,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-03 02:50:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:26,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-03 02:50:26,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 197 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:50:27,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:50:29,303 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:50:29,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1187981202] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:50:29,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205398118] [2022-11-03 02:50:29,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:50:29,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:29,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:29,304 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:50:29,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-03 02:50:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:29,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-03 02:50:29,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 197 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:50:30,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:50:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:50:32,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205398118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:50:32,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:50:32,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 35, 36, 36, 37] total 71 [2022-11-03 02:50:32,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236730329] [2022-11-03 02:50:32,454 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:50:32,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-03 02:50:32,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:32,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-03 02:50:32,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=4639, Unknown=0, NotChecked=0, Total=4970 [2022-11-03 02:50:32,456 INFO L87 Difference]: Start difference. First operand 682 states and 787 transitions. Second operand has 71 states, 71 states have (on average 1.5070422535211268) internal successors, (107), 71 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:18,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:18,686 INFO L93 Difference]: Finished difference Result 923 states and 1062 transitions. [2022-11-03 02:51:18,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-11-03 02:51:18,686 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.5070422535211268) internal successors, (107), 71 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-03 02:51:18,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:18,688 INFO L225 Difference]: With dead ends: 923 [2022-11-03 02:51:18,688 INFO L226 Difference]: Without dead ends: 921 [2022-11-03 02:51:18,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 282 SyntacticMatches, 14 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6513 ImplicationChecksByTransitivity, 60.5s TimeCoverageRelationStatistics Valid=2867, Invalid=28995, Unknown=0, NotChecked=0, Total=31862 [2022-11-03 02:51:18,690 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 209 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1196 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:18,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 362 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1037 Invalid, 0 Unknown, 1196 Unchecked, 1.1s Time] [2022-11-03 02:51:18,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-11-03 02:51:19,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 791. [2022-11-03 02:51:19,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 1.1544303797468354) internal successors, (912), 790 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:19,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 912 transitions. [2022-11-03 02:51:19,117 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 912 transitions. Word has length 61 [2022-11-03 02:51:19,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:19,118 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 912 transitions. [2022-11-03 02:51:19,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.5070422535211268) internal successors, (107), 71 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:19,118 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 912 transitions. [2022-11-03 02:51:19,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 02:51:19,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:19,120 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1] [2022-11-03 02:51:19,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:19,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (65)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:19,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:19,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:19,732 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:19,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:19,733 INFO L85 PathProgramCache]: Analyzing trace with hash -768941557, now seen corresponding path program 14 times [2022-11-03 02:51:19,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:19,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29239650] [2022-11-03 02:51:19,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:51:19,733 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:19,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:19,734 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:19,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-03 02:51:19,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:51:19,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:51:19,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-03 02:51:19,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:23,965 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:51:23,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:51:40,264 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:40,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29239650] [2022-11-03 02:51:40,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29239650] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:40,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [141983672] [2022-11-03 02:51:40,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:51:40,264 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:40,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:51:40,267 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:51:40,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-03 02:51:40,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:51:40,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:51:40,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-03 02:51:40,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:51:41,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:42,786 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:51:42,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [141983672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:42,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671369384] [2022-11-03 02:51:42,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:51:42,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:42,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:42,788 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:42,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-03 02:51:42,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:51:42,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:51:42,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-03 02:51:42,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:51:44,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:51:45,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671369384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:45,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:51:45,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 40, 41, 41, 42] total 81 [2022-11-03 02:51:45,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848462484] [2022-11-03 02:51:45,884 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:51:45,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-03 02:51:45,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:45,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-03 02:51:45,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=6048, Unknown=0, NotChecked=0, Total=6480 [2022-11-03 02:51:45,886 INFO L87 Difference]: Start difference. First operand 791 states and 912 transitions. Second operand has 81 states, 81 states have (on average 1.4938271604938271) internal successors, (121), 81 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:37,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:37,041 INFO L93 Difference]: Finished difference Result 975 states and 1124 transitions. [2022-11-03 02:52:37,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-11-03 02:52:37,042 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.4938271604938271) internal successors, (121), 81 states have internal predecessors, (121), 0 states have call successors, (0), 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 61 [2022-11-03 02:52:37,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:37,045 INFO L225 Difference]: With dead ends: 975 [2022-11-03 02:52:37,045 INFO L226 Difference]: Without dead ends: 973 [2022-11-03 02:52:37,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 288 SyntacticMatches, 8 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7738 ImplicationChecksByTransitivity, 70.1s TimeCoverageRelationStatistics Valid=3842, Invalid=33214, Unknown=0, NotChecked=0, Total=37056 [2022-11-03 02:52:37,048 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 312 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 2112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1128 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:37,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 200 Invalid, 2112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 954 Invalid, 0 Unknown, 1128 Unchecked, 1.1s Time] [2022-11-03 02:52:37,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-11-03 02:52:37,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 828. [2022-11-03 02:52:37,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 1.1523579201934704) internal successors, (953), 827 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:37,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 953 transitions. [2022-11-03 02:52:37,446 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 953 transitions. Word has length 61 [2022-11-03 02:52:37,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:37,446 INFO L495 AbstractCegarLoop]: Abstraction has 828 states and 953 transitions. [2022-11-03 02:52:37,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.4938271604938271) internal successors, (121), 81 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:37,447 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 953 transitions. [2022-11-03 02:52:37,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 02:52:37,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:37,448 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1] [2022-11-03 02:52:37,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:37,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (68)] Ended with exit code 0 [2022-11-03 02:52:37,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-03 02:52:38,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:52:38,071 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:38,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:38,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1178167623, now seen corresponding path program 15 times [2022-11-03 02:52:38,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:52:38,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335610674] [2022-11-03 02:52:38,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:52:38,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:52:38,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:52:38,073 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:52:38,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-03 02:52:38,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-03 02:52:38,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:52:38,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-03 02:52:38,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:52:42,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:52:58,607 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:52:58,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335610674] [2022-11-03 02:52:58,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335610674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:58,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [496490730] [2022-11-03 02:52:58,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:52:58,607 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:52:58,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:52:58,608 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:52:58,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-11-03 02:52:58,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-03 02:52:58,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:52:58,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-03 02:52:58,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:52:59,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:53:01,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [496490730] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:01,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255009476] [2022-11-03 02:53:01,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:53:01,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:01,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:01,075 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:01,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-03 02:53:01,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-03 02:53:01,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:01,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-03 02:53:01,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:53:02,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:53:03,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255009476] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:03,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:53:03,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 40, 41, 40, 41] total 79 [2022-11-03 02:53:03,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431901055] [2022-11-03 02:53:03,485 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:53:03,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-11-03 02:53:03,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:03,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-11-03 02:53:03,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=5754, Unknown=0, NotChecked=0, Total=6162 [2022-11-03 02:53:03,486 INFO L87 Difference]: Start difference. First operand 828 states and 953 transitions. Second operand has 79 states, 79 states have (on average 1.481012658227848) internal successors, (117), 79 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:46,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:46,048 INFO L93 Difference]: Finished difference Result 984 states and 1130 transitions. [2022-11-03 02:53:46,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-03 02:53:46,049 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.481012658227848) internal successors, (117), 79 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-03 02:53:46,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:46,050 INFO L225 Difference]: With dead ends: 984 [2022-11-03 02:53:46,050 INFO L226 Difference]: Without dead ends: 982 [2022-11-03 02:53:46,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 279 SyntacticMatches, 10 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5137 ImplicationChecksByTransitivity, 60.7s TimeCoverageRelationStatistics Valid=2649, Invalid=26421, Unknown=0, NotChecked=0, Total=29070 [2022-11-03 02:53:46,052 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 264 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 2456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1471 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:46,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 207 Invalid, 2456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 968 Invalid, 0 Unknown, 1471 Unchecked, 1.2s Time] [2022-11-03 02:53:46,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-11-03 02:53:46,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 870. [2022-11-03 02:53:46,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.1484464902186422) internal successors, (998), 869 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:46,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 998 transitions. [2022-11-03 02:53:46,506 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 998 transitions. Word has length 61 [2022-11-03 02:53:46,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:46,506 INFO L495 AbstractCegarLoop]: Abstraction has 870 states and 998 transitions. [2022-11-03 02:53:46,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.481012658227848) internal successors, (117), 79 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:46,506 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 998 transitions. [2022-11-03 02:53:46,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:53:46,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:46,508 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 7, 2, 1, 1, 1, 1] [2022-11-03 02:53:46,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (71)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:46,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:46,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:47,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:47,112 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:47,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:47,112 INFO L85 PathProgramCache]: Analyzing trace with hash 772652353, now seen corresponding path program 16 times [2022-11-03 02:53:47,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:47,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502402363] [2022-11-03 02:53:47,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:53:47,113 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:47,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:47,114 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:47,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-03 02:53:47,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:53:47,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:47,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-03 02:53:47,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:53:51,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 269 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:54:11,630 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:11,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502402363] [2022-11-03 02:54:11,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502402363] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:11,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1690175564] [2022-11-03 02:54:11,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:54:11,630 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:54:11,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:54:11,632 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:54:11,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2022-11-03 02:54:11,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:54:11,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:54:11,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-03 02:54:11,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:54:12,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:14,582 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 269 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:54:14,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1690175564] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:14,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983757453] [2022-11-03 02:54:14,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:54:14,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:54:14,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:54:14,586 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:54:14,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-03 02:54:14,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:54:14,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:54:14,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-03 02:54:14,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:15,901 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:54:15,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 269 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:54:18,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983757453] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:18,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:54:18,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 44, 42, 44, 43, 45] total 86 [2022-11-03 02:54:18,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247633954] [2022-11-03 02:54:18,369 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:54:18,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-03 02:54:18,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:18,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-03 02:54:18,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=6843, Unknown=0, NotChecked=0, Total=7310 [2022-11-03 02:54:18,371 INFO L87 Difference]: Start difference. First operand 870 states and 998 transitions. Second operand has 86 states, 86 states have (on average 1.5465116279069768) internal successors, (133), 86 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:35,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:35,742 INFO L93 Difference]: Finished difference Result 1942 states and 2224 transitions. [2022-11-03 02:55:35,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-11-03 02:55:35,742 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.5465116279069768) internal successors, (133), 86 states have internal predecessors, (133), 0 states have call successors, (0), 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 68 [2022-11-03 02:55:35,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:35,745 INFO L225 Difference]: With dead ends: 1942 [2022-11-03 02:55:35,746 INFO L226 Difference]: Without dead ends: 1940 [2022-11-03 02:55:35,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 317 SyntacticMatches, 11 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10196 ImplicationChecksByTransitivity, 100.3s TimeCoverageRelationStatistics Valid=4026, Invalid=43280, Unknown=0, NotChecked=0, Total=47306 [2022-11-03 02:55:35,748 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 344 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 3386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2485 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:35,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 948 Invalid, 3386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 862 Invalid, 0 Unknown, 2485 Unchecked, 1.0s Time] [2022-11-03 02:55:35,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2022-11-03 02:55:36,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 963. [2022-11-03 02:55:36,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.1517671517671517) internal successors, (1108), 962 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:36,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1108 transitions. [2022-11-03 02:55:36,354 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1108 transitions. Word has length 68 [2022-11-03 02:55:36,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:36,354 INFO L495 AbstractCegarLoop]: Abstraction has 963 states and 1108 transitions. [2022-11-03 02:55:36,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.5465116279069768) internal successors, (133), 86 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:36,355 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1108 transitions. [2022-11-03 02:55:36,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:55:36,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:36,357 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 7, 2, 1, 1, 1, 1] [2022-11-03 02:55:36,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:36,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (74)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:36,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:36,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:55:36,982 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:36,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:36,983 INFO L85 PathProgramCache]: Analyzing trace with hash -246066563, now seen corresponding path program 17 times [2022-11-03 02:55:36,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:36,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846270690] [2022-11-03 02:55:36,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 02:55:36,983 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:36,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:36,984 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:36,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5224822b-ee35-4ca4-87ba-d406fc7a9951/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-03 02:55:37,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-03 02:55:37,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:55:37,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-03 02:55:37,116 INFO L286 TraceCheckSpWp]: Computing forward predicates...