./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl --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 32bit --witnessprinter.graph.data.programhash cf2e081cc9f75dea6397073b82669a6a6f9f53b1ab4e083e4f8da1bc210df95c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:52:05,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:52:05,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:52:05,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:52:05,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:52:05,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:52:05,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:52:05,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:52:05,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:52:05,942 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:52:05,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:52:05,946 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:52:05,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:52:05,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:52:05,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:52:05,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:52:05,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:52:05,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:52:05,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:52:05,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:52:05,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:52:05,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:52:05,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:52:05,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:52:06,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:52:06,001 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:52:06,002 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:52:06,004 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:52:06,005 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:52:06,007 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:52:06,009 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:52:06,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:52:06,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:52:06,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:52:06,016 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:52:06,017 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:52:06,018 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:52:06,018 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:52:06,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:52:06,020 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:52:06,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:52:06,022 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:52:06,087 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:52:06,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:52:06,089 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:52:06,089 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:52:06,098 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:52:06,098 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:52:06,099 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:52:06,099 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:52:06,099 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:52:06,100 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:52:06,101 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:52:06,102 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:52:06,102 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:52:06,102 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:52:06,103 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:52:06,103 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:52:06,103 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:52:06,104 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:52:06,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:52:06,105 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:52:06,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:52:06,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:52:06,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:52:06,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:52:06,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:52:06,107 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:52:06,109 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:52:06,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:52:06,110 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:52:06,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:52:06,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:52:06,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:52:06,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:52:06,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:52:06,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:52:06,113 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:52:06,113 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:52:06,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:52:06,114 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:52:06,114 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:52:06,114 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:52:06,114 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf2e081cc9f75dea6397073b82669a6a6f9f53b1ab4e083e4f8da1bc210df95c [2021-11-23 16:52:06,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:52:06,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:52:06,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:52:06,477 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:52:06,478 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:52:06,480 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c [2021-11-23 16:52:06,591 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/data/31c80f251/d5d02b984c9d4059b5f57c2f298e1473/FLAG7c1137a95 [2021-11-23 16:52:07,149 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:52:07,149 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c [2021-11-23 16:52:07,163 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/data/31c80f251/d5d02b984c9d4059b5f57c2f298e1473/FLAG7c1137a95 [2021-11-23 16:52:07,471 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/data/31c80f251/d5d02b984c9d4059b5f57c2f298e1473 [2021-11-23 16:52:07,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:52:07,476 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:52:07,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:52:07,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:52:07,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:52:07,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:52:07" (1/1) ... [2021-11-23 16:52:07,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a527e1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:07, skipping insertion in model container [2021-11-23 16:52:07,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:52:07" (1/1) ... [2021-11-23 16:52:07,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:52:07,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:52:07,865 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_3aca0016-c687-44dc-b580-cd6102915f15/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c[12820,12833] [2021-11-23 16:52:07,869 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:52:07,882 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:52:07,979 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_3aca0016-c687-44dc-b580-cd6102915f15/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c[12820,12833] [2021-11-23 16:52:07,980 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:52:08,013 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:52:08,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:08 WrapperNode [2021-11-23 16:52:08,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:52:08,016 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:52:08,016 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:52:08,016 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:52:08,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:08" (1/1) ... [2021-11-23 16:52:08,057 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:08" (1/1) ... [2021-11-23 16:52:08,124 INFO L137 Inliner]: procedures = 25, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 389 [2021-11-23 16:52:08,124 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:52:08,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:52:08,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:52:08,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:52:08,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:08" (1/1) ... [2021-11-23 16:52:08,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:08" (1/1) ... [2021-11-23 16:52:08,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:08" (1/1) ... [2021-11-23 16:52:08,142 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:08" (1/1) ... [2021-11-23 16:52:08,169 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:08" (1/1) ... [2021-11-23 16:52:08,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:08" (1/1) ... [2021-11-23 16:52:08,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:08" (1/1) ... [2021-11-23 16:52:08,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:52:08,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:52:08,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:52:08,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:52:08,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:08" (1/1) ... [2021-11-23 16:52:08,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:52:08,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:52:08,252 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:52:08,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:52:08,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:52:08,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:52:08,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:52:08,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:52:08,430 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:52:08,432 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:52:09,088 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:52:09,150 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 16:52:09,160 INFO L158 Benchmark]: Toolchain (without parser) took 1679.16ms. Allocated memory was 90.2MB in the beginning and 115.3MB in the end (delta: 25.2MB). Free memory was 52.8MB in the beginning and 80.9MB in the end (delta: -28.1MB). Peak memory consumption was 17.6MB. Max. memory is 16.1GB. [2021-11-23 16:52:09,176 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 90.2MB. Free memory was 70.1MB in the beginning and 70.0MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:52:09,178 INFO L158 Benchmark]: CACSL2BoogieTranslator took 536.90ms. Allocated memory was 90.2MB in the beginning and 115.3MB in the end (delta: 25.2MB). Free memory was 52.6MB in the beginning and 85.9MB in the end (delta: -33.4MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2021-11-23 16:52:09,179 INFO L158 Benchmark]: Boogie Procedure Inliner took 109.03ms. Allocated memory is still 115.3MB. Free memory was 85.9MB in the beginning and 83.1MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:52:09,180 INFO L158 Benchmark]: Boogie Preprocessor took 70.60ms. Allocated memory is still 115.3MB. Free memory was 83.1MB in the beginning and 81.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:52:09,181 INFO L158 Benchmark]: RCFGBuilder took 956.95ms. Allocated memory is still 115.3MB. Free memory was 81.1MB in the beginning and 80.9MB in the end (delta: 222.9kB). Peak memory consumption was 24.3MB. Max. memory is 16.1GB. [2021-11-23 16:52:09,186 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 90.2MB. Free memory was 70.1MB in the beginning and 70.0MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 536.90ms. Allocated memory was 90.2MB in the beginning and 115.3MB in the end (delta: 25.2MB). Free memory was 52.6MB in the beginning and 85.9MB in the end (delta: -33.4MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 109.03ms. Allocated memory is still 115.3MB. Free memory was 85.9MB in the beginning and 83.1MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 70.60ms. Allocated memory is still 115.3MB. Free memory was 83.1MB in the beginning and 81.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 956.95ms. Allocated memory is still 115.3MB. Free memory was 81.1MB in the beginning and 80.9MB in the end (delta: 222.9kB). Peak memory consumption was 24.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 16:52:09,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl --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 32bit --witnessprinter.graph.data.programhash cf2e081cc9f75dea6397073b82669a6a6f9f53b1ab4e083e4f8da1bc210df95c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:52:12,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:52:12,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:52:12,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:52:12,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:52:12,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:52:12,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:52:12,195 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:52:12,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:52:12,210 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:52:12,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:52:12,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:52:12,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:52:12,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:52:12,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:52:12,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:52:12,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:52:12,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:52:12,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:52:12,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:52:12,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:52:12,251 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:52:12,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:52:12,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:52:12,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:52:12,262 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:52:12,262 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:52:12,264 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:52:12,264 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:52:12,266 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:52:12,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:52:12,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:52:12,269 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:52:12,270 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:52:12,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:52:12,272 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:52:12,273 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:52:12,274 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:52:12,274 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:52:12,275 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:52:12,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:52:12,277 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:52:12,312 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:52:12,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:52:12,315 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:52:12,316 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:52:12,317 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:52:12,317 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:52:12,318 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:52:12,318 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:52:12,318 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:52:12,319 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:52:12,320 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:52:12,320 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:52:12,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:52:12,323 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:52:12,323 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:52:12,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:52:12,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:52:12,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:52:12,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:52:12,324 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:52:12,325 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:52:12,325 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:52:12,325 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:52:12,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:52:12,326 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:52:12,326 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:52:12,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:52:12,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:52:12,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:52:12,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:52:12,327 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:52:12,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:52:12,329 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:52:12,329 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:52:12,329 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:52:12,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:52:12,330 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:52:12,330 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:52:12,331 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_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf2e081cc9f75dea6397073b82669a6a6f9f53b1ab4e083e4f8da1bc210df95c [2021-11-23 16:52:12,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:52:12,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:52:12,841 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:52:12,843 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:52:12,845 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:52:12,847 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c [2021-11-23 16:52:12,939 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/data/a7a330e13/cce42d22226949788b4078377b728262/FLAGf208c784d [2021-11-23 16:52:13,704 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:52:13,706 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c [2021-11-23 16:52:13,722 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/data/a7a330e13/cce42d22226949788b4078377b728262/FLAGf208c784d [2021-11-23 16:52:14,011 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/data/a7a330e13/cce42d22226949788b4078377b728262 [2021-11-23 16:52:14,014 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:52:14,016 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:52:14,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:52:14,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:52:14,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:52:14,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:52:14" (1/1) ... [2021-11-23 16:52:14,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6255f1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:14, skipping insertion in model container [2021-11-23 16:52:14,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:52:14" (1/1) ... [2021-11-23 16:52:14,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:52:14,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:52:14,423 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_3aca0016-c687-44dc-b580-cd6102915f15/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c[12820,12833] [2021-11-23 16:52:14,426 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:52:14,472 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:52:14,627 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_3aca0016-c687-44dc-b580-cd6102915f15/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c[12820,12833] [2021-11-23 16:52:14,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:52:14,653 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:52:14,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:14 WrapperNode [2021-11-23 16:52:14,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:52:14,655 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:52:14,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:52:14,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:52:14,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:14" (1/1) ... [2021-11-23 16:52:14,694 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:14" (1/1) ... [2021-11-23 16:52:14,734 INFO L137 Inliner]: procedures = 25, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 372 [2021-11-23 16:52:14,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:52:14,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:52:14,736 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:52:14,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:52:14,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:14" (1/1) ... [2021-11-23 16:52:14,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:14" (1/1) ... [2021-11-23 16:52:14,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:14" (1/1) ... [2021-11-23 16:52:14,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:14" (1/1) ... [2021-11-23 16:52:14,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:14" (1/1) ... [2021-11-23 16:52:14,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:14" (1/1) ... [2021-11-23 16:52:14,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:14" (1/1) ... [2021-11-23 16:52:14,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:52:14,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:52:14,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:52:14,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:52:14,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:14" (1/1) ... [2021-11-23 16:52:14,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:52:14,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:52:14,874 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:52:14,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:52:14,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:52:14,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:52:14,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:52:14,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:52:15,060 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:52:15,062 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:52:15,887 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:52:15,902 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:52:15,902 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 16:52:15,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:52:15 BoogieIcfgContainer [2021-11-23 16:52:15,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:52:15,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:52:15,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:52:15,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:52:15,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:52:14" (1/3) ... [2021-11-23 16:52:15,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b6c481 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:52:15, skipping insertion in model container [2021-11-23 16:52:15,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:52:14" (2/3) ... [2021-11-23 16:52:15,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b6c481 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:52:15, skipping insertion in model container [2021-11-23 16:52:15,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:52:15" (3/3) ... [2021-11-23 16:52:15,918 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c [2021-11-23 16:52:15,928 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:52:15,929 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 16:52:16,011 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:52:16,024 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 16:52:16,025 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 16:52:16,072 INFO L276 IsEmpty]: Start isEmpty. Operand has 124 states, 122 states have (on average 1.7049180327868851) internal successors, (208), 123 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:16,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 16:52:16,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:16,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:16,088 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:16,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:16,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1522683097, now seen corresponding path program 1 times [2021-11-23 16:52:16,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:16,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500192608] [2021-11-23 16:52:16,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:16,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:16,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:16,123 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:16,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:52:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:16,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 16:52:16,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:16,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:16,504 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:16,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500192608] [2021-11-23 16:52:16,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500192608] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:16,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:16,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:52:16,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037863373] [2021-11-23 16:52:16,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:16,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 16:52:16,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:16,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 16:52:16,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 16:52:16,567 INFO L87 Difference]: Start difference. First operand has 124 states, 122 states have (on average 1.7049180327868851) internal successors, (208), 123 states have internal predecessors, (208), 0 states have call successors, (0), 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 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:16,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:16,629 INFO L93 Difference]: Finished difference Result 207 states and 343 transitions. [2021-11-23 16:52:16,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 16:52:16,631 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-23 16:52:16,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:16,645 INFO L225 Difference]: With dead ends: 207 [2021-11-23 16:52:16,646 INFO L226 Difference]: Without dead ends: 120 [2021-11-23 16:52:16,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 16:52:16,655 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:16,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:52:16,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-23 16:52:16,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-11-23 16:52:16,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.6890756302521008) internal successors, (201), 119 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:16,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 201 transitions. [2021-11-23 16:52:16,744 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 201 transitions. Word has length 34 [2021-11-23 16:52:16,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:16,745 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 201 transitions. [2021-11-23 16:52:16,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:16,745 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 201 transitions. [2021-11-23 16:52:16,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 16:52:16,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:16,751 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:16,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:16,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:16,979 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:16,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:16,981 INFO L85 PathProgramCache]: Analyzing trace with hash -136479703, now seen corresponding path program 1 times [2021-11-23 16:52:16,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:16,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261128703] [2021-11-23 16:52:16,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:16,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:16,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:16,984 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:17,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:52:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:17,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:52:17,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:17,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:17,254 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:17,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261128703] [2021-11-23 16:52:17,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261128703] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:17,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:17,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:52:17,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693607199] [2021-11-23 16:52:17,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:17,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:52:17,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:17,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:52:17,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:52:17,273 INFO L87 Difference]: Start difference. First operand 120 states and 201 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:17,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:17,430 INFO L93 Difference]: Finished difference Result 206 states and 336 transitions. [2021-11-23 16:52:17,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:52:17,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-23 16:52:17,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:17,446 INFO L225 Difference]: With dead ends: 206 [2021-11-23 16:52:17,446 INFO L226 Difference]: Without dead ends: 120 [2021-11-23 16:52:17,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:52:17,449 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 3 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:17,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 761 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:52:17,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-23 16:52:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-11-23 16:52:17,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.4201680672268908) internal successors, (169), 119 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:17,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 169 transitions. [2021-11-23 16:52:17,477 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 169 transitions. Word has length 34 [2021-11-23 16:52:17,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:17,478 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 169 transitions. [2021-11-23 16:52:17,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:17,479 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 169 transitions. [2021-11-23 16:52:17,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 16:52:17,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:17,482 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:17,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:17,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:17,683 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:17,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:17,684 INFO L85 PathProgramCache]: Analyzing trace with hash 958823668, now seen corresponding path program 1 times [2021-11-23 16:52:17,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:17,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395757594] [2021-11-23 16:52:17,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:17,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:17,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:17,687 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:17,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:52:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:17,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:52:17,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:18,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:18,087 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:18,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395757594] [2021-11-23 16:52:18,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395757594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:18,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:18,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:52:18,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511637824] [2021-11-23 16:52:18,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:18,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:52:18,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:18,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:52:18,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:52:18,101 INFO L87 Difference]: Start difference. First operand 120 states and 169 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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) [2021-11-23 16:52:18,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:18,138 INFO L93 Difference]: Finished difference Result 272 states and 411 transitions. [2021-11-23 16:52:18,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:52:18,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-23 16:52:18,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:18,141 INFO L225 Difference]: With dead ends: 272 [2021-11-23 16:52:18,142 INFO L226 Difference]: Without dead ends: 190 [2021-11-23 16:52:18,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:52:18,144 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 114 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:18,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 376 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:52:18,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-23 16:52:18,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2021-11-23 16:52:18,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.4866310160427807) internal successors, (278), 187 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:18,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 278 transitions. [2021-11-23 16:52:18,166 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 278 transitions. Word has length 65 [2021-11-23 16:52:18,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:18,166 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 278 transitions. [2021-11-23 16:52:18,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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) [2021-11-23 16:52:18,167 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 278 transitions. [2021-11-23 16:52:18,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 16:52:18,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:18,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:18,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:18,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:18,400 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:18,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:18,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1904004827, now seen corresponding path program 1 times [2021-11-23 16:52:18,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:18,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258778332] [2021-11-23 16:52:18,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:18,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:18,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:18,404 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:18,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 16:52:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:18,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:52:18,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:18,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:18,728 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:18,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258778332] [2021-11-23 16:52:18,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258778332] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:18,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:18,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:52:18,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562623133] [2021-11-23 16:52:18,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:18,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:52:18,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:18,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:52:18,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:52:18,733 INFO L87 Difference]: Start difference. First operand 188 states and 278 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:18,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:18,761 INFO L93 Difference]: Finished difference Result 464 states and 718 transitions. [2021-11-23 16:52:18,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:52:18,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-23 16:52:18,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:18,766 INFO L225 Difference]: With dead ends: 464 [2021-11-23 16:52:18,766 INFO L226 Difference]: Without dead ends: 314 [2021-11-23 16:52:18,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:52:18,770 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 109 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:18,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 367 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:52:18,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-23 16:52:18,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2021-11-23 16:52:18,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.527331189710611) internal successors, (475), 311 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:18,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 475 transitions. [2021-11-23 16:52:18,803 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 475 transitions. Word has length 66 [2021-11-23 16:52:18,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:18,804 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 475 transitions. [2021-11-23 16:52:18,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:18,804 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 475 transitions. [2021-11-23 16:52:18,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 16:52:18,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:18,808 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:18,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:19,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:19,021 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:19,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:19,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1896694372, now seen corresponding path program 1 times [2021-11-23 16:52:19,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:19,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121053387] [2021-11-23 16:52:19,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:19,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:19,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:19,025 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:19,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 16:52:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:19,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:52:19,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:19,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:19,403 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:19,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121053387] [2021-11-23 16:52:19,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121053387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:19,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:19,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:52:19,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019860001] [2021-11-23 16:52:19,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:19,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:52:19,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:19,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:52:19,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:52:19,407 INFO L87 Difference]: Start difference. First operand 312 states and 475 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:19,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:19,449 INFO L93 Difference]: Finished difference Result 812 states and 1269 transitions. [2021-11-23 16:52:19,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:52:19,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-23 16:52:19,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:19,455 INFO L225 Difference]: With dead ends: 812 [2021-11-23 16:52:19,455 INFO L226 Difference]: Without dead ends: 538 [2021-11-23 16:52:19,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:52:19,467 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 104 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:19,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 358 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:52:19,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-23 16:52:19,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 536. [2021-11-23 16:52:19,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 1.5457943925233646) internal successors, (827), 535 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:19,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 827 transitions. [2021-11-23 16:52:19,513 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 827 transitions. Word has length 67 [2021-11-23 16:52:19,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:19,516 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 827 transitions. [2021-11-23 16:52:19,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:19,517 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 827 transitions. [2021-11-23 16:52:19,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 16:52:19,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:19,526 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:19,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:19,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:19,736 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:19,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:19,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1528655733, now seen corresponding path program 1 times [2021-11-23 16:52:19,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:19,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915088565] [2021-11-23 16:52:19,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:19,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:19,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:19,740 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:19,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 16:52:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:19,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:52:19,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:20,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:20,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:20,012 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:20,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915088565] [2021-11-23 16:52:20,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1915088565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:20,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:20,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:52:20,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159650541] [2021-11-23 16:52:20,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:20,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:52:20,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:20,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:52:20,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:52:20,016 INFO L87 Difference]: Start difference. First operand 536 states and 827 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:20,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:20,064 INFO L93 Difference]: Finished difference Result 1436 states and 2245 transitions. [2021-11-23 16:52:20,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:52:20,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 [2021-11-23 16:52:20,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:20,097 INFO L225 Difference]: With dead ends: 1436 [2021-11-23 16:52:20,097 INFO L226 Difference]: Without dead ends: 938 [2021-11-23 16:52:20,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:52:20,104 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 99 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:20,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 349 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:52:20,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-11-23 16:52:20,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 936. [2021-11-23 16:52:20,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 1.5475935828877005) internal successors, (1447), 935 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:20,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1447 transitions. [2021-11-23 16:52:20,157 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1447 transitions. Word has length 68 [2021-11-23 16:52:20,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:20,158 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 1447 transitions. [2021-11-23 16:52:20,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:20,158 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1447 transitions. [2021-11-23 16:52:20,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 16:52:20,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:20,161 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:20,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:20,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:20,380 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:20,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:20,381 INFO L85 PathProgramCache]: Analyzing trace with hash -571662380, now seen corresponding path program 1 times [2021-11-23 16:52:20,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:20,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886902139] [2021-11-23 16:52:20,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:20,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:20,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:20,383 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:20,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 16:52:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:20,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:52:20,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:20,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:20,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:20,970 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:20,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886902139] [2021-11-23 16:52:20,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886902139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:20,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:20,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:52:20,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294009532] [2021-11-23 16:52:20,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:20,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 16:52:20,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:20,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 16:52:20,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:52:20,974 INFO L87 Difference]: Start difference. First operand 936 states and 1447 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:21,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:21,345 INFO L93 Difference]: Finished difference Result 4962 states and 7692 transitions. [2021-11-23 16:52:21,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:52:21,347 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-23 16:52:21,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:21,379 INFO L225 Difference]: With dead ends: 4962 [2021-11-23 16:52:21,379 INFO L226 Difference]: Without dead ends: 4064 [2021-11-23 16:52:21,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:52:21,384 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 652 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:21,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [652 Valid, 882 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:52:21,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4064 states. [2021-11-23 16:52:21,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4064 to 4056. [2021-11-23 16:52:21,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4056 states, 4055 states have (on average 1.5445129469790382) internal successors, (6263), 4055 states have internal predecessors, (6263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:21,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4056 states to 4056 states and 6263 transitions. [2021-11-23 16:52:21,631 INFO L78 Accepts]: Start accepts. Automaton has 4056 states and 6263 transitions. Word has length 69 [2021-11-23 16:52:21,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:21,636 INFO L470 AbstractCegarLoop]: Abstraction has 4056 states and 6263 transitions. [2021-11-23 16:52:21,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:21,636 INFO L276 IsEmpty]: Start isEmpty. Operand 4056 states and 6263 transitions. [2021-11-23 16:52:21,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 16:52:21,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:21,638 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:21,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:21,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:21,852 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:21,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:21,853 INFO L85 PathProgramCache]: Analyzing trace with hash -238588952, now seen corresponding path program 1 times [2021-11-23 16:52:21,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:21,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1265666885] [2021-11-23 16:52:21,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:21,854 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:21,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:21,861 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:21,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 16:52:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:21,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:52:21,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:22,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:22,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:22,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:22,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1265666885] [2021-11-23 16:52:22,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1265666885] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:22,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:22,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:52:22,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52984113] [2021-11-23 16:52:22,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:22,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:52:22,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:22,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:52:22,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:52:22,159 INFO L87 Difference]: Start difference. First operand 4056 states and 6263 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:22,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:22,482 INFO L93 Difference]: Finished difference Result 11020 states and 16953 transitions. [2021-11-23 16:52:22,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:52:22,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-11-23 16:52:22,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:22,534 INFO L225 Difference]: With dead ends: 11020 [2021-11-23 16:52:22,535 INFO L226 Difference]: Without dead ends: 7002 [2021-11-23 16:52:22,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:52:22,542 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 116 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:22,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 395 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:52:22,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7002 states. [2021-11-23 16:52:22,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7002 to 7000. [2021-11-23 16:52:22,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7000 states, 6999 states have (on average 1.521217316759537) internal successors, (10647), 6999 states have internal predecessors, (10647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:23,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7000 states to 7000 states and 10647 transitions. [2021-11-23 16:52:23,001 INFO L78 Accepts]: Start accepts. Automaton has 7000 states and 10647 transitions. Word has length 70 [2021-11-23 16:52:23,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:23,001 INFO L470 AbstractCegarLoop]: Abstraction has 7000 states and 10647 transitions. [2021-11-23 16:52:23,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:23,002 INFO L276 IsEmpty]: Start isEmpty. Operand 7000 states and 10647 transitions. [2021-11-23 16:52:23,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 16:52:23,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:23,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:23,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:23,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:23,218 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:23,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:23,218 INFO L85 PathProgramCache]: Analyzing trace with hash -965246768, now seen corresponding path program 1 times [2021-11-23 16:52:23,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:23,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180368367] [2021-11-23 16:52:23,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:23,219 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:23,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:23,220 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:23,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 16:52:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:23,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:52:23,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:24,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:24,727 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:24,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180368367] [2021-11-23 16:52:24,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180368367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:24,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:24,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:52:24,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292720806] [2021-11-23 16:52:24,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:24,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 16:52:24,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:24,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 16:52:24,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:52:24,730 INFO L87 Difference]: Start difference. First operand 7000 states and 10647 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:26,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:26,054 INFO L93 Difference]: Finished difference Result 35492 states and 54141 transitions. [2021-11-23 16:52:26,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:52:26,055 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-11-23 16:52:26,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:26,228 INFO L225 Difference]: With dead ends: 35492 [2021-11-23 16:52:26,228 INFO L226 Difference]: Without dead ends: 28530 [2021-11-23 16:52:26,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:52:26,253 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 795 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 1054 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:26,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 1054 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:52:26,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28530 states. [2021-11-23 16:52:27,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28530 to 13960. [2021-11-23 16:52:27,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13960 states, 13959 states have (on average 1.4997492657067124) internal successors, (20935), 13959 states have internal predecessors, (20935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:27,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13960 states to 13960 states and 20935 transitions. [2021-11-23 16:52:27,549 INFO L78 Accepts]: Start accepts. Automaton has 13960 states and 20935 transitions. Word has length 70 [2021-11-23 16:52:27,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:27,550 INFO L470 AbstractCegarLoop]: Abstraction has 13960 states and 20935 transitions. [2021-11-23 16:52:27,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:27,551 INFO L276 IsEmpty]: Start isEmpty. Operand 13960 states and 20935 transitions. [2021-11-23 16:52:27,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 16:52:27,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:27,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:27,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-23 16:52:27,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:27,766 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:27,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:27,766 INFO L85 PathProgramCache]: Analyzing trace with hash -241201943, now seen corresponding path program 1 times [2021-11-23 16:52:27,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:27,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900874071] [2021-11-23 16:52:27,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:27,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:27,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:27,769 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:27,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 16:52:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:27,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:52:27,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:28,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:28,049 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:28,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900874071] [2021-11-23 16:52:28,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900874071] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:28,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:28,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:52:28,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468154482] [2021-11-23 16:52:28,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:28,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:52:28,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:28,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:52:28,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:52:28,053 INFO L87 Difference]: Start difference. First operand 13960 states and 20935 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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) [2021-11-23 16:52:29,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:29,469 INFO L93 Difference]: Finished difference Result 29162 states and 43112 transitions. [2021-11-23 16:52:29,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:52:29,470 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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) Word has length 71 [2021-11-23 16:52:29,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:29,558 INFO L225 Difference]: With dead ends: 29162 [2021-11-23 16:52:29,558 INFO L226 Difference]: Without dead ends: 29160 [2021-11-23 16:52:29,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:52:29,569 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 372 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:29,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 737 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:52:29,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29160 states. [2021-11-23 16:52:30,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29160 to 14920. [2021-11-23 16:52:30,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14920 states, 14919 states have (on average 1.4675916616395202) internal successors, (21895), 14919 states have internal predecessors, (21895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:30,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14920 states to 14920 states and 21895 transitions. [2021-11-23 16:52:30,890 INFO L78 Accepts]: Start accepts. Automaton has 14920 states and 21895 transitions. Word has length 71 [2021-11-23 16:52:30,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:30,891 INFO L470 AbstractCegarLoop]: Abstraction has 14920 states and 21895 transitions. [2021-11-23 16:52:30,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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) [2021-11-23 16:52:30,891 INFO L276 IsEmpty]: Start isEmpty. Operand 14920 states and 21895 transitions. [2021-11-23 16:52:30,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 16:52:30,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:30,896 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:30,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:31,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:31,111 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:31,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:31,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1165253064, now seen corresponding path program 1 times [2021-11-23 16:52:31,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:31,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653154836] [2021-11-23 16:52:31,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:31,112 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:31,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:31,114 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:31,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 16:52:31,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:31,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:52:31,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:31,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:31,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:31,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653154836] [2021-11-23 16:52:31,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653154836] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:31,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:31,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:52:31,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906057881] [2021-11-23 16:52:31,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:31,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:52:31,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:31,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:52:31,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:52:31,437 INFO L87 Difference]: Start difference. First operand 14920 states and 21895 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:32,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:32,403 INFO L93 Difference]: Finished difference Result 36446 states and 53547 transitions. [2021-11-23 16:52:32,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:52:32,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-23 16:52:32,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:32,464 INFO L225 Difference]: With dead ends: 36446 [2021-11-23 16:52:32,464 INFO L226 Difference]: Without dead ends: 21564 [2021-11-23 16:52:32,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:52:32,490 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 89 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:32,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 294 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:52:32,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21564 states. [2021-11-23 16:52:33,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21564 to 21418. [2021-11-23 16:52:33,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21418 states, 21417 states have (on average 1.4594481019750665) internal successors, (31257), 21417 states have internal predecessors, (31257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:33,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21418 states to 21418 states and 31257 transitions. [2021-11-23 16:52:33,545 INFO L78 Accepts]: Start accepts. Automaton has 21418 states and 31257 transitions. Word has length 72 [2021-11-23 16:52:33,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:33,545 INFO L470 AbstractCegarLoop]: Abstraction has 21418 states and 31257 transitions. [2021-11-23 16:52:33,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:33,546 INFO L276 IsEmpty]: Start isEmpty. Operand 21418 states and 31257 transitions. [2021-11-23 16:52:33,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 16:52:33,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:33,561 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:33,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:33,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:33,775 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:33,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:33,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1893321424, now seen corresponding path program 1 times [2021-11-23 16:52:33,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:33,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014428243] [2021-11-23 16:52:33,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:33,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:33,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:33,780 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:33,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 16:52:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:33,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:33,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:36,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:36,902 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:36,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014428243] [2021-11-23 16:52:36,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014428243] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:36,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [254123376] [2021-11-23 16:52:36,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:36,903 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:52:36,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:52:36,906 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:52:36,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 16:52:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:37,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:37,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:38,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:39,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [254123376] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:39,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761218948] [2021-11-23 16:52:39,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:39,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:52:39,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:52:39,536 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:52:39,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 16:52:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:39,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:39,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:41,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:41,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761218948] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:41,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:52:41,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:52:41,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990584552] [2021-11-23 16:52:41,613 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:52:41,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:52:41,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:41,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:52:41,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:52:41,615 INFO L87 Difference]: Start difference. First operand 21418 states and 31257 transitions. Second operand has 16 states, 16 states have (on average 11.5625) internal successors, (185), 15 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:42,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:42,912 INFO L93 Difference]: Finished difference Result 42317 states and 61698 transitions. [2021-11-23 16:52:42,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 16:52:42,912 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.5625) internal successors, (185), 15 states have internal predecessors, (185), 0 states have call successors, (0), 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 101 [2021-11-23 16:52:42,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:42,968 INFO L225 Difference]: With dead ends: 42317 [2021-11-23 16:52:42,969 INFO L226 Difference]: Without dead ends: 24267 [2021-11-23 16:52:42,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 586 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-23 16:52:42,996 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 345 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1810 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:42,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 1810 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 257 Invalid, 0 Unknown, 311 Unchecked, 0.2s Time] [2021-11-23 16:52:43,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24267 states. [2021-11-23 16:52:43,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24267 to 21472. [2021-11-23 16:52:43,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21472 states, 21471 states have (on average 1.459224069675376) internal successors, (31331), 21471 states have internal predecessors, (31331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:44,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21472 states to 21472 states and 31331 transitions. [2021-11-23 16:52:44,008 INFO L78 Accepts]: Start accepts. Automaton has 21472 states and 31331 transitions. Word has length 101 [2021-11-23 16:52:44,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:44,008 INFO L470 AbstractCegarLoop]: Abstraction has 21472 states and 31331 transitions. [2021-11-23 16:52:44,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.5625) internal successors, (185), 15 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:44,009 INFO L276 IsEmpty]: Start isEmpty. Operand 21472 states and 31331 transitions. [2021-11-23 16:52:44,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 16:52:44,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:44,025 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:44,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:44,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:44,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-23 16:52:44,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:52:44,641 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:44,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:44,641 INFO L85 PathProgramCache]: Analyzing trace with hash 489462833, now seen corresponding path program 1 times [2021-11-23 16:52:44,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:44,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674118747] [2021-11-23 16:52:44,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:44,642 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:44,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:44,643 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:44,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 16:52:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:44,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:52:44,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:44,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:44,934 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:44,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674118747] [2021-11-23 16:52:44,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674118747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:44,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:44,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:52:44,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849401598] [2021-11-23 16:52:44,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:44,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:52:44,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:44,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:52:44,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:52:44,936 INFO L87 Difference]: Start difference. First operand 21472 states and 31331 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 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) [2021-11-23 16:52:45,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:45,534 INFO L93 Difference]: Finished difference Result 36518 states and 53401 transitions. [2021-11-23 16:52:45,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:52:45,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 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 101 [2021-11-23 16:52:45,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:45,566 INFO L225 Difference]: With dead ends: 36518 [2021-11-23 16:52:45,566 INFO L226 Difference]: Without dead ends: 15130 [2021-11-23 16:52:45,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:52:45,598 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 89 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:45,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 366 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:52:45,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15130 states. [2021-11-23 16:52:46,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15130 to 15128. [2021-11-23 16:52:46,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15128 states, 15127 states have (on average 1.4544853573081244) internal successors, (22002), 15127 states have internal predecessors, (22002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:46,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15128 states to 15128 states and 22002 transitions. [2021-11-23 16:52:46,355 INFO L78 Accepts]: Start accepts. Automaton has 15128 states and 22002 transitions. Word has length 101 [2021-11-23 16:52:46,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:46,355 INFO L470 AbstractCegarLoop]: Abstraction has 15128 states and 22002 transitions. [2021-11-23 16:52:46,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 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) [2021-11-23 16:52:46,356 INFO L276 IsEmpty]: Start isEmpty. Operand 15128 states and 22002 transitions. [2021-11-23 16:52:46,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 16:52:46,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:46,367 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:46,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:46,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:46,581 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:46,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:46,581 INFO L85 PathProgramCache]: Analyzing trace with hash -506536014, now seen corresponding path program 1 times [2021-11-23 16:52:46,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:46,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834171459] [2021-11-23 16:52:46,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:46,583 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:46,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:46,584 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:46,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 16:52:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:46,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:52:46,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 16:52:47,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:47,361 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:47,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834171459] [2021-11-23 16:52:47,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834171459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:47,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:47,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:52:47,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184328405] [2021-11-23 16:52:47,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:47,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:52:47,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:47,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:52:47,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:52:47,369 INFO L87 Difference]: Start difference. First operand 15128 states and 22002 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:47,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:47,987 INFO L93 Difference]: Finished difference Result 27384 states and 39911 transitions. [2021-11-23 16:52:47,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:52:47,988 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-23 16:52:47,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:48,018 INFO L225 Difference]: With dead ends: 27384 [2021-11-23 16:52:48,019 INFO L226 Difference]: Without dead ends: 15129 [2021-11-23 16:52:48,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:52:48,035 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 63 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:48,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 302 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2021-11-23 16:52:48,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15129 states. [2021-11-23 16:52:48,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15129 to 15128. [2021-11-23 16:52:48,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15128 states, 15127 states have (on average 1.4544192503470617) internal successors, (22001), 15127 states have internal predecessors, (22001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:48,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15128 states to 15128 states and 22001 transitions. [2021-11-23 16:52:48,790 INFO L78 Accepts]: Start accepts. Automaton has 15128 states and 22001 transitions. Word has length 101 [2021-11-23 16:52:48,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:48,791 INFO L470 AbstractCegarLoop]: Abstraction has 15128 states and 22001 transitions. [2021-11-23 16:52:48,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:48,791 INFO L276 IsEmpty]: Start isEmpty. Operand 15128 states and 22001 transitions. [2021-11-23 16:52:48,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 16:52:48,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:48,801 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:48,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:49,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:49,015 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:49,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:49,015 INFO L85 PathProgramCache]: Analyzing trace with hash 605004106, now seen corresponding path program 1 times [2021-11-23 16:52:49,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:49,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [545025271] [2021-11-23 16:52:49,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:49,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:49,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:49,017 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:49,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 16:52:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:49,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:49,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:50,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:51,265 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:51,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [545025271] [2021-11-23 16:52:51,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [545025271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:51,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1334985443] [2021-11-23 16:52:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:51,266 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:52:51,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:52:51,272 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:52:51,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-23 16:52:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:51,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:51,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:52,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:53,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1334985443] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:53,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633997419] [2021-11-23 16:52:53,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:53,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:52:53,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:52:53,412 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:52:53,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 16:52:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:53,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:53,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:55,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:55,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:55,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633997419] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:55,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:52:55,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:52:55,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346977286] [2021-11-23 16:52:55,904 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:52:55,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:52:55,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:55,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:52:55,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:52:55,907 INFO L87 Difference]: Start difference. First operand 15128 states and 22001 transitions. Second operand has 16 states, 16 states have (on average 11.8125) internal successors, (189), 15 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:57,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:57,019 INFO L93 Difference]: Finished difference Result 32726 states and 47823 transitions. [2021-11-23 16:52:57,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 16:52:57,020 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.8125) internal successors, (189), 15 states have internal predecessors, (189), 0 states have call successors, (0), 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 101 [2021-11-23 16:52:57,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:57,052 INFO L225 Difference]: With dead ends: 32726 [2021-11-23 16:52:57,052 INFO L226 Difference]: Without dead ends: 23412 [2021-11-23 16:52:57,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 586 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-23 16:52:57,065 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 325 mSDsluCounter, 2348 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 2620 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 470 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:57,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 2620 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 256 Invalid, 0 Unknown, 470 Unchecked, 0.2s Time] [2021-11-23 16:52:57,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23412 states. [2021-11-23 16:52:58,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23412 to 22642. [2021-11-23 16:52:58,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22642 states, 22641 states have (on average 1.4434433108078266) internal successors, (32681), 22641 states have internal predecessors, (32681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:58,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22642 states to 22642 states and 32681 transitions. [2021-11-23 16:52:58,050 INFO L78 Accepts]: Start accepts. Automaton has 22642 states and 32681 transitions. Word has length 101 [2021-11-23 16:52:58,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:58,051 INFO L470 AbstractCegarLoop]: Abstraction has 22642 states and 32681 transitions. [2021-11-23 16:52:58,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.8125) internal successors, (189), 15 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:58,051 INFO L276 IsEmpty]: Start isEmpty. Operand 22642 states and 32681 transitions. [2021-11-23 16:52:58,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 16:52:58,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:58,063 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:58,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-23 16:52:58,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:58,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-23 16:52:58,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:52:58,666 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:58,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:58,666 INFO L85 PathProgramCache]: Analyzing trace with hash 123923848, now seen corresponding path program 1 times [2021-11-23 16:52:58,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:58,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534036251] [2021-11-23 16:52:58,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:58,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:58,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:58,668 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:58,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 16:52:58,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:58,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:52:58,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 16:52:59,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:59,374 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:59,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534036251] [2021-11-23 16:52:59,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534036251] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:59,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:59,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:52:59,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395376688] [2021-11-23 16:52:59,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:59,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:52:59,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:59,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:52:59,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:52:59,376 INFO L87 Difference]: Start difference. First operand 22642 states and 32681 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:00,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:00,144 INFO L93 Difference]: Finished difference Result 36441 states and 52708 transitions. [2021-11-23 16:53:00,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:53:00,145 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 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 101 [2021-11-23 16:53:00,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:00,170 INFO L225 Difference]: With dead ends: 36441 [2021-11-23 16:53:00,171 INFO L226 Difference]: Without dead ends: 22644 [2021-11-23 16:53:00,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:53:00,179 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 39 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:00,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 558 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 89 Unchecked, 0.1s Time] [2021-11-23 16:53:00,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22644 states. [2021-11-23 16:53:00,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22644 to 22642. [2021-11-23 16:53:00,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22642 states, 22641 states have (on average 1.4433991431473874) internal successors, (32680), 22641 states have internal predecessors, (32680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:00,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22642 states to 22642 states and 32680 transitions. [2021-11-23 16:53:00,933 INFO L78 Accepts]: Start accepts. Automaton has 22642 states and 32680 transitions. Word has length 101 [2021-11-23 16:53:00,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:00,933 INFO L470 AbstractCegarLoop]: Abstraction has 22642 states and 32680 transitions. [2021-11-23 16:53:00,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:00,934 INFO L276 IsEmpty]: Start isEmpty. Operand 22642 states and 32680 transitions. [2021-11-23 16:53:00,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 16:53:00,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:00,943 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:53:00,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:01,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:01,158 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:01,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:01,158 INFO L85 PathProgramCache]: Analyzing trace with hash 285766026, now seen corresponding path program 1 times [2021-11-23 16:53:01,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:01,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184728591] [2021-11-23 16:53:01,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:01,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:01,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:01,161 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:01,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 16:53:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:01,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:53:01,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:02,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:02,934 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:02,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1184728591] [2021-11-23 16:53:02,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1184728591] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:02,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [541143752] [2021-11-23 16:53:02,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:02,936 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:53:02,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:53:02,937 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:53:02,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-23 16:53:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:03,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:53:03,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:03,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:04,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [541143752] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:04,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974104342] [2021-11-23 16:53:04,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:04,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:53:04,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:53:04,564 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:53:04,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 16:53:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:04,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:53:04,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:05,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:06,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:06,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974104342] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:06,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:53:06,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:53:06,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796385336] [2021-11-23 16:53:06,266 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:53:06,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:53:06,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:06,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:53:06,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:53:06,268 INFO L87 Difference]: Start difference. First operand 22642 states and 32680 transitions. Second operand has 16 states, 16 states have (on average 11.0625) internal successors, (177), 15 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:07,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:07,351 INFO L93 Difference]: Finished difference Result 42341 states and 61339 transitions. [2021-11-23 16:53:07,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 16:53:07,351 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.0625) internal successors, (177), 15 states have internal predecessors, (177), 0 states have call successors, (0), 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 101 [2021-11-23 16:53:07,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:07,409 INFO L225 Difference]: With dead ends: 42341 [2021-11-23 16:53:07,409 INFO L226 Difference]: Without dead ends: 36811 [2021-11-23 16:53:07,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 586 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-11-23 16:53:07,422 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 202 mSDsluCounter, 2025 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 2245 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:07,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 2245 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 153 Invalid, 0 Unknown, 178 Unchecked, 0.1s Time] [2021-11-23 16:53:07,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36811 states. [2021-11-23 16:53:08,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36811 to 34513. [2021-11-23 16:53:08,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34513 states, 34512 states have (on average 1.4390646731571628) internal successors, (49665), 34512 states have internal predecessors, (49665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:08,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34513 states to 34513 states and 49665 transitions. [2021-11-23 16:53:08,789 INFO L78 Accepts]: Start accepts. Automaton has 34513 states and 49665 transitions. Word has length 101 [2021-11-23 16:53:08,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:08,789 INFO L470 AbstractCegarLoop]: Abstraction has 34513 states and 49665 transitions. [2021-11-23 16:53:08,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.0625) internal successors, (177), 15 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:08,790 INFO L276 IsEmpty]: Start isEmpty. Operand 34513 states and 49665 transitions. [2021-11-23 16:53:08,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 16:53:08,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:08,803 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:53:08,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:09,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:09,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:09,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:09,405 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:09,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:09,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1086041272, now seen corresponding path program 1 times [2021-11-23 16:53:09,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:09,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491774202] [2021-11-23 16:53:09,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:09,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:09,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:09,407 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:09,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 16:53:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:09,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:53:09,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:10,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 16:53:10,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:10,009 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:10,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491774202] [2021-11-23 16:53:10,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491774202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:10,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:10,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:53:10,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592878755] [2021-11-23 16:53:10,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:10,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:53:10,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:10,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:53:10,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:53:10,011 INFO L87 Difference]: Start difference. First operand 34513 states and 49665 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:10,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:10,887 INFO L93 Difference]: Finished difference Result 40059 states and 57686 transitions. [2021-11-23 16:53:10,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:53:10,888 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 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 101 [2021-11-23 16:53:10,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:10,934 INFO L225 Difference]: With dead ends: 40059 [2021-11-23 16:53:10,935 INFO L226 Difference]: Without dead ends: 34517 [2021-11-23 16:53:10,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:53:10,951 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 73 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:10,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 339 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 30 Unchecked, 0.0s Time] [2021-11-23 16:53:10,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34517 states. [2021-11-23 16:53:12,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34517 to 34513. [2021-11-23 16:53:12,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34513 states, 34512 states have (on average 1.4390356977283263) internal successors, (49664), 34512 states have internal predecessors, (49664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:12,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34513 states to 34513 states and 49664 transitions. [2021-11-23 16:53:12,291 INFO L78 Accepts]: Start accepts. Automaton has 34513 states and 49664 transitions. Word has length 101 [2021-11-23 16:53:12,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:12,291 INFO L470 AbstractCegarLoop]: Abstraction has 34513 states and 49664 transitions. [2021-11-23 16:53:12,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:12,292 INFO L276 IsEmpty]: Start isEmpty. Operand 34513 states and 49664 transitions. [2021-11-23 16:53:12,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 16:53:12,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:12,305 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:53:12,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:12,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:12,519 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:12,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:12,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1516604656, now seen corresponding path program 1 times [2021-11-23 16:53:12,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:12,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174474143] [2021-11-23 16:53:12,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:12,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:12,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:12,522 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:12,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 16:53:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:12,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:53:12,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:14,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:14,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:14,763 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:14,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174474143] [2021-11-23 16:53:14,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174474143] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:14,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [335630135] [2021-11-23 16:53:14,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:14,764 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:53:14,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:53:14,765 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:53:14,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-23 16:53:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:14,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:53:14,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:16,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:16,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [335630135] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:16,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953262664] [2021-11-23 16:53:16,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:16,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:53:16,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:53:16,879 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:53:16,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-23 16:53:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:16,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:53:16,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:18,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:19,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:19,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953262664] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:19,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:53:19,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:53:19,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645201522] [2021-11-23 16:53:19,258 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:53:19,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:53:19,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:19,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:53:19,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:53:19,260 INFO L87 Difference]: Start difference. First operand 34513 states and 49664 transitions. Second operand has 16 states, 16 states have (on average 12.0625) internal successors, (193), 15 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:20,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:20,805 INFO L93 Difference]: Finished difference Result 61509 states and 88608 transitions. [2021-11-23 16:53:20,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 16:53:20,805 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 12.0625) internal successors, (193), 15 states have internal predecessors, (193), 0 states have call successors, (0), 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 101 [2021-11-23 16:53:20,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:20,872 INFO L225 Difference]: With dead ends: 61509 [2021-11-23 16:53:20,873 INFO L226 Difference]: Without dead ends: 46987 [2021-11-23 16:53:20,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 587 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-11-23 16:53:20,892 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 382 mSDsluCounter, 1909 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 2187 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:20,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 2187 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 178 Unchecked, 0.1s Time] [2021-11-23 16:53:20,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46987 states. [2021-11-23 16:53:22,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46987 to 43495. [2021-11-23 16:53:22,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43495 states, 43494 states have (on average 1.436588954798363) internal successors, (62483), 43494 states have internal predecessors, (62483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:22,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43495 states to 43495 states and 62483 transitions. [2021-11-23 16:53:22,706 INFO L78 Accepts]: Start accepts. Automaton has 43495 states and 62483 transitions. Word has length 101 [2021-11-23 16:53:22,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:22,706 INFO L470 AbstractCegarLoop]: Abstraction has 43495 states and 62483 transitions. [2021-11-23 16:53:22,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.0625) internal successors, (193), 15 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:22,707 INFO L276 IsEmpty]: Start isEmpty. Operand 43495 states and 62483 transitions. [2021-11-23 16:53:22,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 16:53:22,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:22,723 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:53:22,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:22,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:23,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-23 16:53:23,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:23,324 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:23,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:23,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1884876302, now seen corresponding path program 1 times [2021-11-23 16:53:23,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:23,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495855627] [2021-11-23 16:53:23,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:23,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:23,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:23,326 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:23,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 16:53:23,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:23,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:53:23,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:23,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:53:23,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:23,945 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:23,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495855627] [2021-11-23 16:53:23,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495855627] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:23,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:23,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:53:23,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933729698] [2021-11-23 16:53:23,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:23,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:53:23,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:23,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:53:23,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:53:23,947 INFO L87 Difference]: Start difference. First operand 43495 states and 62483 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:25,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:25,725 INFO L93 Difference]: Finished difference Result 58063 states and 83500 transitions. [2021-11-23 16:53:25,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:53:25,726 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 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 101 [2021-11-23 16:53:25,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:25,784 INFO L225 Difference]: With dead ends: 58063 [2021-11-23 16:53:25,784 INFO L226 Difference]: Without dead ends: 43497 [2021-11-23 16:53:25,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:53:25,799 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 77 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:25,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 312 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-11-23 16:53:25,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43497 states. [2021-11-23 16:53:27,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43497 to 43495. [2021-11-23 16:53:27,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43495 states, 43494 states have (on average 1.43656596312135) internal successors, (62482), 43494 states have internal predecessors, (62482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:27,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43495 states to 43495 states and 62482 transitions. [2021-11-23 16:53:27,743 INFO L78 Accepts]: Start accepts. Automaton has 43495 states and 62482 transitions. Word has length 101 [2021-11-23 16:53:27,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:27,744 INFO L470 AbstractCegarLoop]: Abstraction has 43495 states and 62482 transitions. [2021-11-23 16:53:27,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:27,744 INFO L276 IsEmpty]: Start isEmpty. Operand 43495 states and 62482 transitions. [2021-11-23 16:53:27,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 16:53:27,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:27,763 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:53:27,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:27,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:27,977 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:27,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:27,977 INFO L85 PathProgramCache]: Analyzing trace with hash 246790088, now seen corresponding path program 1 times [2021-11-23 16:53:27,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:27,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333984697] [2021-11-23 16:53:27,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:27,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:27,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:27,979 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:27,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 16:53:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:28,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:53:28,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 16:53:28,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:28,469 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:28,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333984697] [2021-11-23 16:53:28,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333984697] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:28,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:28,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:53:28,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990006808] [2021-11-23 16:53:28,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:28,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:53:28,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:28,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:53:28,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:53:28,470 INFO L87 Difference]: Start difference. First operand 43495 states and 62482 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:30,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:30,143 INFO L93 Difference]: Finished difference Result 86623 states and 124497 transitions. [2021-11-23 16:53:30,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:53:30,143 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 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 101 [2021-11-23 16:53:30,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:30,209 INFO L225 Difference]: With dead ends: 86623 [2021-11-23 16:53:30,209 INFO L226 Difference]: Without dead ends: 43495 [2021-11-23 16:53:30,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:53:30,235 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 57 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:30,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 297 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2021-11-23 16:53:30,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43495 states. [2021-11-23 16:53:32,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43495 to 43495. [2021-11-23 16:53:32,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43495 states, 43494 states have (on average 1.4365429714443372) internal successors, (62481), 43494 states have internal predecessors, (62481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:32,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43495 states to 43495 states and 62481 transitions. [2021-11-23 16:53:32,524 INFO L78 Accepts]: Start accepts. Automaton has 43495 states and 62481 transitions. Word has length 101 [2021-11-23 16:53:32,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:32,524 INFO L470 AbstractCegarLoop]: Abstraction has 43495 states and 62481 transitions. [2021-11-23 16:53:32,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:32,525 INFO L276 IsEmpty]: Start isEmpty. Operand 43495 states and 62481 transitions. [2021-11-23 16:53:32,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 16:53:32,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:32,542 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:53:32,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:32,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:32,743 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:32,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:32,743 INFO L85 PathProgramCache]: Analyzing trace with hash 44966154, now seen corresponding path program 1 times [2021-11-23 16:53:32,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:32,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034297181] [2021-11-23 16:53:32,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:32,744 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:32,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:32,745 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:32,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-23 16:53:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:32,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:53:32,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:34,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:34,621 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:34,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034297181] [2021-11-23 16:53:34,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034297181] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:34,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1910215705] [2021-11-23 16:53:34,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:34,622 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:53:34,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:53:34,636 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:53:34,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-23 16:53:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:34,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:53:34,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:35,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:36,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1910215705] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:36,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545513951] [2021-11-23 16:53:36,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:36,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:53:36,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:53:36,227 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:53:36,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-23 16:53:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:36,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:53:36,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:37,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:37,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545513951] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:37,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:53:37,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:53:37,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999832075] [2021-11-23 16:53:37,673 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:53:37,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:53:37,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:37,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:53:37,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:53:37,674 INFO L87 Difference]: Start difference. First operand 43495 states and 62481 transitions. Second operand has 16 states, 16 states have (on average 11.3125) internal successors, (181), 15 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:41,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:41,839 INFO L93 Difference]: Finished difference Result 144375 states and 205999 transitions. [2021-11-23 16:53:41,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 16:53:41,840 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.3125) internal successors, (181), 15 states have internal predecessors, (181), 0 states have call successors, (0), 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 101 [2021-11-23 16:53:41,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:42,019 INFO L225 Difference]: With dead ends: 144375 [2021-11-23 16:53:42,020 INFO L226 Difference]: Without dead ends: 101705 [2021-11-23 16:53:42,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 586 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-11-23 16:53:42,056 INFO L933 BasicCegarLoop]: 485 mSDtfsCounter, 456 mSDsluCounter, 3461 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 3946 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 726 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:42,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 3946 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1010 Invalid, 0 Unknown, 726 Unchecked, 0.6s Time] [2021-11-23 16:53:42,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101705 states. [2021-11-23 16:53:45,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101705 to 68275. [2021-11-23 16:53:45,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68275 states, 68274 states have (on average 1.4309839763306675) internal successors, (97699), 68274 states have internal predecessors, (97699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:45,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68275 states to 68275 states and 97699 transitions. [2021-11-23 16:53:45,907 INFO L78 Accepts]: Start accepts. Automaton has 68275 states and 97699 transitions. Word has length 101 [2021-11-23 16:53:45,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:45,907 INFO L470 AbstractCegarLoop]: Abstraction has 68275 states and 97699 transitions. [2021-11-23 16:53:45,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.3125) internal successors, (181), 15 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:45,907 INFO L276 IsEmpty]: Start isEmpty. Operand 68275 states and 97699 transitions. [2021-11-23 16:53:45,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 16:53:45,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:45,928 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:53:45,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:46,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:46,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-23 16:53:46,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:46,536 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:46,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:46,536 INFO L85 PathProgramCache]: Analyzing trace with hash 729223750, now seen corresponding path program 1 times [2021-11-23 16:53:46,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:46,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967639595] [2021-11-23 16:53:46,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:46,537 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:46,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:46,540 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:46,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-23 16:53:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:46,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:53:46,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:48,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:48,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:48,450 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:48,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967639595] [2021-11-23 16:53:48,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967639595] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:48,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1624022824] [2021-11-23 16:53:48,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:48,451 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:53:48,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:53:48,452 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:53:48,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-23 16:53:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:48,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:53:48,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:49,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:50,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1624022824] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:50,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156817217] [2021-11-23 16:53:50,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:50,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:53:50,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:53:50,357 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:53:50,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3aca0016-c687-44dc-b580-cd6102915f15/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-23 16:53:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:50,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:53:50,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:51,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:52,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:52,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156817217] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:52,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:53:52,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:53:52,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015732467] [2021-11-23 16:53:52,244 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:53:52,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:53:52,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:52,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:53:52,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:53:52,247 INFO L87 Difference]: Start difference. First operand 68275 states and 97699 transitions. Second operand has 16 states, 16 states have (on average 11.6875) internal successors, (187), 15 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)