./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.anderson.2.prop1-func-interl.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.anderson.2.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 14f81a0d6a388b613f6256ef89322a578d67b2b4527606e37681918ec5903dd9 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:06:25,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:06:25,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:06:25,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:06:25,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:06:25,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:06:25,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:06:25,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:06:25,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:06:25,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:06:25,172 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:06:25,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:06:25,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:06:25,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:06:25,176 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:06:25,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:06:25,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:06:25,180 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:06:25,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:06:25,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:06:25,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:06:25,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:06:25,193 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:06:25,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:06:25,199 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:06:25,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:06:25,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:06:25,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:06:25,208 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:06:25,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:06:25,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:06:25,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:06:25,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:06:25,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:06:25,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:06:25,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:06:25,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:06:25,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:06:25,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:06:25,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:06:25,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:06:25,221 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:06:25,270 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:06:25,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:06:25,271 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:06:25,272 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:06:25,273 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:06:25,273 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:06:25,273 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:06:25,273 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:06:25,274 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:06:25,274 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:06:25,275 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:06:25,275 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:06:25,276 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:06:25,276 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:06:25,276 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:06:25,276 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:06:25,277 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:06:25,277 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:06:25,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:06:25,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:06:25,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:06:25,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:06:25,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:06:25,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:06:25,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:06:25,279 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:06:25,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:06:25,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:06:25,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:06:25,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:06:25,280 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:06:25,281 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:06:25,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:06:25,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:06:25,282 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:06:25,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:06:25,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:06:25,283 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:06:25,283 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14f81a0d6a388b613f6256ef89322a578d67b2b4527606e37681918ec5903dd9 [2022-11-03 02:06:25,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:06:25,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:06:25,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:06:25,634 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:06:25,635 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:06:25,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.anderson.2.prop1-func-interl.c [2022-11-03 02:06:25,732 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/data/637f466db/1c6891699d874dc9843218a090c2d7ad/FLAGd317fcc1b [2022-11-03 02:06:26,295 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:06:26,296 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.anderson.2.prop1-func-interl.c [2022-11-03 02:06:26,313 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/data/637f466db/1c6891699d874dc9843218a090c2d7ad/FLAGd317fcc1b [2022-11-03 02:06:26,727 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/data/637f466db/1c6891699d874dc9843218a090c2d7ad [2022-11-03 02:06:26,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:06:26,732 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:06:26,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:06:26,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:06:26,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:06:26,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:06:26" (1/1) ... [2022-11-03 02:06:26,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57e5e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:26, skipping insertion in model container [2022-11-03 02:06:26,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:06:26" (1/1) ... [2022-11-03 02:06:26,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:06:26,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:06:27,021 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_8e7b0268-0cba-491c-88fe-41371ad18540/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.anderson.2.prop1-func-interl.c[1014,1027] [2022-11-03 02:06:27,406 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:06:27,410 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:06:27,423 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_8e7b0268-0cba-491c-88fe-41371ad18540/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.anderson.2.prop1-func-interl.c[1014,1027] [2022-11-03 02:06:27,631 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:06:27,644 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:06:27,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:27 WrapperNode [2022-11-03 02:06:27,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:06:27,646 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:06:27,646 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:06:27,646 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:06:27,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:27" (1/1) ... [2022-11-03 02:06:27,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:27" (1/1) ... [2022-11-03 02:06:27,873 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1527 [2022-11-03 02:06:27,874 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:06:27,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:06:27,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:06:27,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:06:27,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:27" (1/1) ... [2022-11-03 02:06:27,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:27" (1/1) ... [2022-11-03 02:06:27,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:27" (1/1) ... [2022-11-03 02:06:27,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:27" (1/1) ... [2022-11-03 02:06:28,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:27" (1/1) ... [2022-11-03 02:06:28,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:27" (1/1) ... [2022-11-03 02:06:28,118 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:27" (1/1) ... [2022-11-03 02:06:28,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:27" (1/1) ... [2022-11-03 02:06:28,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:06:28,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:06:28,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:06:28,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:06:28,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:27" (1/1) ... [2022-11-03 02:06:28,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:06:28,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:28,220 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:06:28,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:06:28,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:06:28,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:06:28,713 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:06:28,715 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:06:48,004 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:07:17,933 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:07:17,933 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:07:17,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:07:17 BoogieIcfgContainer [2022-11-03 02:07:17,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:07:17,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:07:17,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:07:17,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:07:17,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:06:26" (1/3) ... [2022-11-03 02:07:17,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5878e28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:07:17, skipping insertion in model container [2022-11-03 02:07:17,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:27" (2/3) ... [2022-11-03 02:07:17,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5878e28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:07:17, skipping insertion in model container [2022-11-03 02:07:17,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:07:17" (3/3) ... [2022-11-03 02:07:17,946 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.anderson.2.prop1-func-interl.c [2022-11-03 02:07:17,966 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:07:17,966 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:07:18,015 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:07:18,023 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6a683381, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:07:18,023 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:07:18,028 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:18,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:07:18,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:18,035 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:07:18,036 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:18,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:18,041 INFO L85 PathProgramCache]: Analyzing trace with hash 12921735, now seen corresponding path program 1 times [2022-11-03 02:07:18,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:18,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825781958] [2022-11-03 02:07:18,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:18,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:07:18,547 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:07:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:07:18,747 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:07:18,749 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:07:18,750 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:07:18,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:07:18,757 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:07:18,765 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:07:18,805 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:07:18,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:07:18 BoogieIcfgContainer [2022-11-03 02:07:18,833 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:07:18,836 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:07:18,836 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:07:18,836 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:07:18,838 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:07:17" (3/4) ... [2022-11-03 02:07:18,842 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:07:18,842 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:07:18,844 INFO L158 Benchmark]: Toolchain (without parser) took 52111.57ms. Allocated memory was 111.1MB in the beginning and 4.8GB in the end (delta: 4.7GB). Free memory was 62.6MB in the beginning and 3.2GB in the end (delta: -3.1GB). Peak memory consumption was 1.6GB. Max. memory is 16.1GB. [2022-11-03 02:07:18,845 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 111.1MB. Free memory is still 81.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:07:18,846 INFO L158 Benchmark]: CACSL2BoogieTranslator took 911.42ms. Allocated memory was 111.1MB in the beginning and 134.2MB in the end (delta: 23.1MB). Free memory was 62.4MB in the beginning and 98.7MB in the end (delta: -36.3MB). Peak memory consumption was 28.1MB. Max. memory is 16.1GB. [2022-11-03 02:07:18,847 INFO L158 Benchmark]: Boogie Procedure Inliner took 228.04ms. Allocated memory is still 134.2MB. Free memory was 98.7MB in the beginning and 65.1MB in the end (delta: 33.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2022-11-03 02:07:18,853 INFO L158 Benchmark]: Boogie Preprocessor took 305.50ms. Allocated memory is still 134.2MB. Free memory was 65.1MB in the beginning and 72.4MB in the end (delta: -7.3MB). Peak memory consumption was 22.7MB. Max. memory is 16.1GB. [2022-11-03 02:07:18,855 INFO L158 Benchmark]: RCFGBuilder took 49755.24ms. Allocated memory was 134.2MB in the beginning and 4.8GB in the end (delta: 4.7GB). Free memory was 72.4MB in the beginning and 3.2GB in the end (delta: -3.2GB). Peak memory consumption was 1.9GB. Max. memory is 16.1GB. [2022-11-03 02:07:18,856 INFO L158 Benchmark]: TraceAbstraction took 894.31ms. Allocated memory is still 4.8GB. Free memory was 3.2GB in the beginning and 3.2GB in the end (delta: 66.1MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. [2022-11-03 02:07:18,857 INFO L158 Benchmark]: Witness Printer took 6.91ms. Allocated memory is still 4.8GB. Free memory is still 3.2GB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:07:18,864 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 111.1MB. Free memory is still 81.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 911.42ms. Allocated memory was 111.1MB in the beginning and 134.2MB in the end (delta: 23.1MB). Free memory was 62.4MB in the beginning and 98.7MB in the end (delta: -36.3MB). Peak memory consumption was 28.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 228.04ms. Allocated memory is still 134.2MB. Free memory was 98.7MB in the beginning and 65.1MB in the end (delta: 33.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 305.50ms. Allocated memory is still 134.2MB. Free memory was 65.1MB in the beginning and 72.4MB in the end (delta: -7.3MB). Peak memory consumption was 22.7MB. Max. memory is 16.1GB. * RCFGBuilder took 49755.24ms. Allocated memory was 134.2MB in the beginning and 4.8GB in the end (delta: 4.7GB). Free memory was 72.4MB in the beginning and 3.2GB in the end (delta: -3.2GB). Peak memory consumption was 1.9GB. Max. memory is 16.1GB. * TraceAbstraction took 894.31ms. Allocated memory is still 4.8GB. Free memory was 3.2GB in the beginning and 3.2GB in the end (delta: 66.1MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. * Witness Printer took 6.91ms. Allocated memory is still 4.8GB. Free memory is still 3.2GB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 190, overapproximation of bitwiseAnd at line 146. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_2 mask_SORT_2 = (SORT_2)-1 >> (sizeof(SORT_2) * 8 - 8); [L29] const SORT_2 msb_SORT_2 = (SORT_2)1 << (8 - 1); [L31] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 24); [L32] const SORT_3 msb_SORT_3 = (SORT_3)1 << (24 - 1); [L34] const SORT_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 32); [L35] const SORT_4 msb_SORT_4 = (SORT_4)1 << (32 - 1); [L37] const SORT_2 var_5 = 0; [L38] const SORT_1 var_20 = 0; [L39] const SORT_4 var_53 = 1; [L40] const SORT_4 var_54 = 0; [L41] const SORT_2 var_63 = 1; [L42] const SORT_3 var_65 = 0; [L43] const SORT_4 var_68 = 3; [L44] const SORT_2 var_72 = 0; [L45] const SORT_4 var_122 = 2; [L46] const SORT_2 var_125 = 2; [L48] SORT_1 input_64; [L49] SORT_1 input_74; [L50] SORT_1 input_76; [L51] SORT_1 input_83; [L52] SORT_1 input_85; [L53] SORT_1 input_92; [L54] SORT_1 input_143; [L55] SORT_1 input_147; [L56] SORT_1 input_150; [L57] SORT_1 input_151; [L58] SORT_1 input_152; [L59] SORT_1 input_153; [L60] SORT_1 input_161; [L61] SORT_1 input_167; [L62] SORT_1 input_173; [L63] SORT_1 input_188; [L64] SORT_1 input_206; [L65] SORT_1 input_224; [L67] SORT_2 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L68] SORT_2 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L69] SORT_2 state_10 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L70] SORT_2 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L71] SORT_2 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L72] SORT_2 state_16 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L73] SORT_2 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L74] SORT_1 state_21 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L75] SORT_1 state_23 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L76] SORT_1 state_25 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L77] SORT_1 state_27 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L78] SORT_1 state_29 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L79] SORT_1 state_31 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L80] SORT_1 state_33 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L81] SORT_1 state_35 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L82] SORT_1 state_37 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L83] SORT_1 state_39 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L84] SORT_1 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L85] SORT_1 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L86] SORT_1 state_45 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L87] SORT_1 state_47 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L88] SORT_1 state_49 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L89] SORT_1 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L91] SORT_2 init_7_arg_1 = var_5; [L92] state_6 = init_7_arg_1 [L93] SORT_2 init_9_arg_1 = var_5; [L94] state_8 = init_9_arg_1 [L95] SORT_2 init_11_arg_1 = var_5; [L96] state_10 = init_11_arg_1 [L97] SORT_2 init_13_arg_1 = var_5; [L98] state_12 = init_13_arg_1 [L99] SORT_2 init_15_arg_1 = var_5; [L100] state_14 = init_15_arg_1 [L101] SORT_2 init_17_arg_1 = var_5; [L102] state_16 = init_17_arg_1 [L103] SORT_2 init_19_arg_1 = var_5; [L104] state_18 = init_19_arg_1 [L105] SORT_1 init_22_arg_1 = var_20; [L106] state_21 = init_22_arg_1 [L107] SORT_1 init_24_arg_1 = var_20; [L108] state_23 = init_24_arg_1 [L109] SORT_1 init_26_arg_1 = var_20; [L110] state_25 = init_26_arg_1 [L111] SORT_1 init_28_arg_1 = var_20; [L112] state_27 = init_28_arg_1 [L113] SORT_1 init_30_arg_1 = var_20; [L114] state_29 = init_30_arg_1 [L115] SORT_1 init_32_arg_1 = var_20; [L116] state_31 = init_32_arg_1 [L117] SORT_1 init_34_arg_1 = var_20; [L118] state_33 = init_34_arg_1 [L119] SORT_1 init_36_arg_1 = var_20; [L120] state_35 = init_36_arg_1 [L121] SORT_1 init_38_arg_1 = var_20; [L122] state_37 = init_38_arg_1 [L123] SORT_1 init_40_arg_1 = var_20; [L124] state_39 = init_40_arg_1 [L125] SORT_1 init_42_arg_1 = var_20; [L126] state_41 = init_42_arg_1 [L127] SORT_1 init_44_arg_1 = var_20; [L128] state_43 = init_44_arg_1 [L129] SORT_1 init_46_arg_1 = var_20; [L130] state_45 = init_46_arg_1 [L131] SORT_1 init_48_arg_1 = var_20; [L132] state_47 = init_48_arg_1 [L133] SORT_1 init_50_arg_1 = var_20; [L134] state_49 = init_50_arg_1 [L135] SORT_1 init_52_arg_1 = var_20; [L136] state_51 = init_52_arg_1 VAL [init_11_arg_1=0, init_13_arg_1=0, init_15_arg_1=0, init_17_arg_1=0, init_19_arg_1=0, init_22_arg_1=0, init_24_arg_1=0, init_26_arg_1=0, init_28_arg_1=0, init_30_arg_1=0, init_32_arg_1=0, init_34_arg_1=0, init_36_arg_1=0, init_38_arg_1=0, init_40_arg_1=0, init_42_arg_1=0, init_44_arg_1=0, init_46_arg_1=0, init_48_arg_1=0, init_50_arg_1=0, init_52_arg_1=0, init_7_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_2=255, mask_SORT_3=4294967295, mask_SORT_4=4294967295, msb_SORT_1=1, msb_SORT_2=128, msb_SORT_3=8388608, msb_SORT_4=2147483648, state_10=0, state_12=0, state_14=0, state_16=0, state_18=0, state_21=0, state_23=0, state_25=0, state_27=0, state_29=0, state_31=0, state_33=0, state_35=0, state_37=0, state_39=0, state_41=0, state_43=0, state_45=0, state_47=0, state_49=0, state_51=0, state_6=0, state_8=0, var_122=2, var_125=2, var_20=0, var_5=0, var_53=1, var_54=0, var_63=1, var_65=0, var_68=3, var_72=0] [L139] input_64 = __VERIFIER_nondet_uchar() [L140] input_74 = __VERIFIER_nondet_uchar() [L141] input_76 = __VERIFIER_nondet_uchar() [L142] input_83 = __VERIFIER_nondet_uchar() [L143] input_85 = __VERIFIER_nondet_uchar() [L144] input_92 = __VERIFIER_nondet_uchar() [L145] input_143 = __VERIFIER_nondet_uchar() [L146] input_143 = input_143 & mask_SORT_1 [L147] input_147 = __VERIFIER_nondet_uchar() [L148] input_147 = input_147 & mask_SORT_1 [L149] input_150 = __VERIFIER_nondet_uchar() [L150] input_150 = input_150 & mask_SORT_1 [L151] input_151 = __VERIFIER_nondet_uchar() [L152] input_151 = input_151 & mask_SORT_1 [L153] input_152 = __VERIFIER_nondet_uchar() [L154] input_152 = input_152 & mask_SORT_1 [L155] input_153 = __VERIFIER_nondet_uchar() [L156] input_153 = input_153 & mask_SORT_1 [L157] input_161 = __VERIFIER_nondet_uchar() [L158] input_161 = input_161 & mask_SORT_1 [L159] input_167 = __VERIFIER_nondet_uchar() [L160] input_167 = input_167 & mask_SORT_1 [L161] input_173 = __VERIFIER_nondet_uchar() [L162] input_173 = input_173 & mask_SORT_1 [L163] input_188 = __VERIFIER_nondet_uchar() [L164] input_206 = __VERIFIER_nondet_uchar() [L165] input_224 = __VERIFIER_nondet_uchar() [L168] SORT_1 var_55_arg_0 = state_29; [L169] SORT_4 var_55_arg_1 = var_53; [L170] SORT_4 var_55_arg_2 = var_54; [L171] EXPR var_55_arg_0 ? var_55_arg_1 : var_55_arg_2 [L171] SORT_4 var_55 = var_55_arg_0 ? var_55_arg_1 : var_55_arg_2; [L172] SORT_1 var_56_arg_0 = state_39; [L173] SORT_4 var_56_arg_1 = var_53; [L174] SORT_4 var_56_arg_2 = var_54; [L175] EXPR var_56_arg_0 ? var_56_arg_1 : var_56_arg_2 [L175] SORT_4 var_56 = var_56_arg_0 ? var_56_arg_1 : var_56_arg_2; [L176] SORT_4 var_57_arg_0 = var_55; [L177] SORT_4 var_57_arg_1 = var_56; [L178] SORT_4 var_57 = var_57_arg_0 + var_57_arg_1; [L179] SORT_1 var_58_arg_0 = state_49; [L180] SORT_4 var_58_arg_1 = var_53; [L181] SORT_4 var_58_arg_2 = var_54; [L182] EXPR var_58_arg_0 ? var_58_arg_1 : var_58_arg_2 [L182] SORT_4 var_58 = var_58_arg_0 ? var_58_arg_1 : var_58_arg_2; [L183] SORT_4 var_59_arg_0 = var_57; [L184] SORT_4 var_59_arg_1 = var_58; [L185] SORT_4 var_59 = var_59_arg_0 + var_59_arg_1; [L186] var_59 = var_59 & mask_SORT_4 [L187] SORT_4 var_60_arg_0 = var_59; [L188] SORT_4 var_60_arg_1 = var_53; [L189] SORT_1 var_60 = var_60_arg_0 <= var_60_arg_1; [L190] SORT_1 var_61_arg_0 = ~state_51; [L191] var_61_arg_0 = var_61_arg_0 & mask_SORT_1 [L192] SORT_1 var_61_arg_1 = ~var_60; [L193] var_61_arg_1 = var_61_arg_1 & mask_SORT_1 [L194] SORT_1 var_61 = var_61_arg_0 & var_61_arg_1; [L195] var_61 = var_61 & mask_SORT_1 [L196] SORT_1 bad_62_arg_0 = var_61; [L197] CALL __VERIFIER_assert(!(bad_62_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:07:18,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.anderson.2.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 14f81a0d6a388b613f6256ef89322a578d67b2b4527606e37681918ec5903dd9 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:07:21,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:07:21,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:07:21,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:07:21,650 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:07:21,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:07:21,658 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:07:21,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:07:21,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:07:21,672 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:07:21,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:07:21,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:07:21,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:07:21,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:07:21,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:07:21,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:07:21,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:07:21,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:07:21,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:07:21,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:07:21,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:07:21,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:07:21,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:07:21,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:07:21,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:07:21,717 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:07:21,717 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:07:21,718 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:07:21,720 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:07:21,721 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:07:21,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:07:21,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:07:21,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:07:21,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:07:21,727 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:07:21,727 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:07:21,746 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:07:21,746 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:07:21,747 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:07:21,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:07:21,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:07:21,754 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:07:21,791 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:07:21,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:07:21,792 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:07:21,792 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:07:21,793 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:07:21,793 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:07:21,794 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:07:21,794 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:07:21,794 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:07:21,794 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:07:21,794 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:07:21,795 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:07:21,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:07:21,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:07:21,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:07:21,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:07:21,796 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:07:21,797 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:07:21,797 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:07:21,797 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:07:21,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:07:21,797 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:07:21,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:07:21,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:07:21,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:07:21,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:07:21,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:07:21,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:07:21,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:07:21,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:07:21,799 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:07:21,799 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:07:21,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:07:21,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:07:21,800 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:07:21,800 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_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14f81a0d6a388b613f6256ef89322a578d67b2b4527606e37681918ec5903dd9 [2022-11-03 02:07:22,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:07:22,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:07:22,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:07:22,176 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:07:22,183 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:07:22,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.anderson.2.prop1-func-interl.c [2022-11-03 02:07:22,278 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/data/bf7f9547c/366faf792bdb40739c2d178bf4c93da4/FLAGa95d41bee [2022-11-03 02:07:22,959 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:07:22,960 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.anderson.2.prop1-func-interl.c [2022-11-03 02:07:22,980 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/data/bf7f9547c/366faf792bdb40739c2d178bf4c93da4/FLAGa95d41bee [2022-11-03 02:07:23,197 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/data/bf7f9547c/366faf792bdb40739c2d178bf4c93da4 [2022-11-03 02:07:23,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:07:23,201 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:07:23,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:07:23,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:07:23,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:07:23,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:07:23" (1/1) ... [2022-11-03 02:07:23,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@977144d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:23, skipping insertion in model container [2022-11-03 02:07:23,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:07:23" (1/1) ... [2022-11-03 02:07:23,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:07:23,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:07:23,441 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_8e7b0268-0cba-491c-88fe-41371ad18540/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.anderson.2.prop1-func-interl.c[1014,1027] [2022-11-03 02:07:23,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:07:23,822 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:07:23,833 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_8e7b0268-0cba-491c-88fe-41371ad18540/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.anderson.2.prop1-func-interl.c[1014,1027] [2022-11-03 02:07:23,929 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:07:23,942 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:07:23,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:23 WrapperNode [2022-11-03 02:07:23,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:07:23,944 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:07:23,944 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:07:23,944 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:07:23,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:23" (1/1) ... [2022-11-03 02:07:23,984 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:23" (1/1) ... [2022-11-03 02:07:24,066 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1527 [2022-11-03 02:07:24,067 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:07:24,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:07:24,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:07:24,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:07:24,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:23" (1/1) ... [2022-11-03 02:07:24,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:23" (1/1) ... [2022-11-03 02:07:24,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:23" (1/1) ... [2022-11-03 02:07:24,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:23" (1/1) ... [2022-11-03 02:07:24,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:23" (1/1) ... [2022-11-03 02:07:24,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:23" (1/1) ... [2022-11-03 02:07:24,178 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:23" (1/1) ... [2022-11-03 02:07:24,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:23" (1/1) ... [2022-11-03 02:07:24,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:07:24,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:07:24,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:07:24,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:07:24,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:23" (1/1) ... [2022-11-03 02:07:24,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:07:24,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:24,232 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:07:24,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:07:24,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:07:24,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:07:24,697 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:07:24,700 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:07:26,215 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:07:26,229 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:07:26,230 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:07:26,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:07:26 BoogieIcfgContainer [2022-11-03 02:07:26,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:07:26,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:07:26,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:07:26,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:07:26,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:07:23" (1/3) ... [2022-11-03 02:07:26,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aba792b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:07:26, skipping insertion in model container [2022-11-03 02:07:26,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:23" (2/3) ... [2022-11-03 02:07:26,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aba792b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:07:26, skipping insertion in model container [2022-11-03 02:07:26,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:07:26" (3/3) ... [2022-11-03 02:07:26,247 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.anderson.2.prop1-func-interl.c [2022-11-03 02:07:26,270 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:07:26,270 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:07:26,328 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:07:26,335 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@670e0f43, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:07:26,336 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:07:26,346 INFO L276 IsEmpty]: Start isEmpty. Operand has 113 states, 111 states have (on average 1.4954954954954955) internal successors, (166), 112 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:26,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:07:26,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:26,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:26,358 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:26,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:26,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1473645707, now seen corresponding path program 1 times [2022-11-03 02:07:26,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:26,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1907940274] [2022-11-03 02:07:26,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:26,385 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:26,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:26,390 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:26,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:07:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:26,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:07:26,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:26,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:26,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:26,880 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:26,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1907940274] [2022-11-03 02:07:26,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1907940274] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:26,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:26,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:26,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399781861] [2022-11-03 02:07:26,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:26,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:26,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:26,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:26,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:26,934 INFO L87 Difference]: Start difference. First operand has 113 states, 111 states have (on average 1.4954954954954955) internal successors, (166), 112 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:27,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:27,242 INFO L93 Difference]: Finished difference Result 433 states and 647 transitions. [2022-11-03 02:07:27,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:07:27,245 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-03 02:07:27,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:27,266 INFO L225 Difference]: With dead ends: 433 [2022-11-03 02:07:27,266 INFO L226 Difference]: Without dead ends: 322 [2022-11-03 02:07:27,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:27,289 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 466 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:27,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 619 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:07:27,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-11-03 02:07:27,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 111. [2022-11-03 02:07:27,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.4727272727272727) internal successors, (162), 110 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:27,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 162 transitions. [2022-11-03 02:07:27,367 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 162 transitions. Word has length 11 [2022-11-03 02:07:27,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:27,367 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 162 transitions. [2022-11-03 02:07:27,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:27,368 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 162 transitions. [2022-11-03 02:07:27,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:07:27,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:27,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:27,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:27,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:27,583 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:27,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:27,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2011974963, now seen corresponding path program 1 times [2022-11-03 02:07:27,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:27,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [948869626] [2022-11-03 02:07:27,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:27,584 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:27,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:27,586 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:27,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:07:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:27,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:07:27,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:27,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:27,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:27,926 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:27,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [948869626] [2022-11-03 02:07:27,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [948869626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:27,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:27,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:27,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286287343] [2022-11-03 02:07:27,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:27,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:27,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:27,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:27,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:27,937 INFO L87 Difference]: Start difference. First operand 111 states and 162 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:28,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:28,126 INFO L93 Difference]: Finished difference Result 429 states and 631 transitions. [2022-11-03 02:07:28,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:07:28,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-03 02:07:28,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:28,129 INFO L225 Difference]: With dead ends: 429 [2022-11-03 02:07:28,129 INFO L226 Difference]: Without dead ends: 322 [2022-11-03 02:07:28,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:28,131 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 460 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:28,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 618 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:07:28,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-11-03 02:07:28,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 113. [2022-11-03 02:07:28,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.4642857142857142) internal successors, (164), 112 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:28,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 164 transitions. [2022-11-03 02:07:28,141 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 164 transitions. Word has length 11 [2022-11-03 02:07:28,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:28,142 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 164 transitions. [2022-11-03 02:07:28,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:28,142 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 164 transitions. [2022-11-03 02:07:28,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:07:28,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:28,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:28,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:28,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:28,356 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:28,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:28,357 INFO L85 PathProgramCache]: Analyzing trace with hash 2069233265, now seen corresponding path program 1 times [2022-11-03 02:07:28,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:28,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62211007] [2022-11-03 02:07:28,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:28,358 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:28,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:28,359 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:28,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:07:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:28,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:07:28,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:28,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:28,696 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:28,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62211007] [2022-11-03 02:07:28,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62211007] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:28,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:28,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:28,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382430601] [2022-11-03 02:07:28,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:28,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:28,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:28,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:28,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:28,699 INFO L87 Difference]: Start difference. First operand 113 states and 164 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:28,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:28,823 INFO L93 Difference]: Finished difference Result 429 states and 630 transitions. [2022-11-03 02:07:28,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:07:28,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-03 02:07:28,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:28,826 INFO L225 Difference]: With dead ends: 429 [2022-11-03 02:07:28,826 INFO L226 Difference]: Without dead ends: 322 [2022-11-03 02:07:28,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:28,828 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 454 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:28,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 620 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:07:28,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-11-03 02:07:28,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 115. [2022-11-03 02:07:28,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.456140350877193) internal successors, (166), 114 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:28,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 166 transitions. [2022-11-03 02:07:28,835 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 166 transitions. Word has length 11 [2022-11-03 02:07:28,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:28,836 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 166 transitions. [2022-11-03 02:07:28,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:28,836 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 166 transitions. [2022-11-03 02:07:28,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:07:28,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:28,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:28,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:29,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:29,055 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:29,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:29,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2069292847, now seen corresponding path program 1 times [2022-11-03 02:07:29,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:29,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1477990484] [2022-11-03 02:07:29,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:29,056 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:29,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:29,058 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:29,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:07:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:29,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:07:29,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:29,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:29,711 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:29,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1477990484] [2022-11-03 02:07:29,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1477990484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:29,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:29,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:07:29,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959988155] [2022-11-03 02:07:29,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:29,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:07:29,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:29,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:07:29,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:07:29,714 INFO L87 Difference]: Start difference. First operand 115 states and 166 transitions. Second operand has 10 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:31,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:31,283 INFO L93 Difference]: Finished difference Result 453 states and 661 transitions. [2022-11-03 02:07:31,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:07:31,285 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-03 02:07:31,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:31,287 INFO L225 Difference]: With dead ends: 453 [2022-11-03 02:07:31,287 INFO L226 Difference]: Without dead ends: 451 [2022-11-03 02:07:31,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:07:31,288 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 1077 mSDsluCounter, 1301 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 1454 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:31,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1077 Valid, 1454 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:07:31,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-11-03 02:07:31,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 121. [2022-11-03 02:07:31,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.45) internal successors, (174), 120 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:31,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 174 transitions. [2022-11-03 02:07:31,300 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 174 transitions. Word has length 11 [2022-11-03 02:07:31,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:31,300 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 174 transitions. [2022-11-03 02:07:31,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:31,301 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 174 transitions. [2022-11-03 02:07:31,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:07:31,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:31,305 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:31,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:31,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:31,518 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:31,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:31,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1080052299, now seen corresponding path program 1 times [2022-11-03 02:07:31,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:31,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941157664] [2022-11-03 02:07:31,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:31,522 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:31,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:31,523 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:31,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:07:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:32,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:07:32,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:32,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:32,718 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:32,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941157664] [2022-11-03 02:07:32,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941157664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:32,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:32,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:32,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124688820] [2022-11-03 02:07:32,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:32,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:32,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:32,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:32,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:32,721 INFO L87 Difference]: Start difference. First operand 121 states and 174 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:32,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:32,954 INFO L93 Difference]: Finished difference Result 238 states and 345 transitions. [2022-11-03 02:07:32,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:07:32,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-03 02:07:32,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:32,956 INFO L225 Difference]: With dead ends: 238 [2022-11-03 02:07:32,956 INFO L226 Difference]: Without dead ends: 125 [2022-11-03 02:07:32,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:32,957 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 1 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:32,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 412 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-11-03 02:07:32,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-03 02:07:32,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-11-03 02:07:32,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.435483870967742) internal successors, (178), 124 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:32,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 178 transitions. [2022-11-03 02:07:32,963 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 178 transitions. Word has length 116 [2022-11-03 02:07:32,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:32,964 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 178 transitions. [2022-11-03 02:07:32,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:32,964 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 178 transitions. [2022-11-03 02:07:32,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:07:32,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:32,966 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:33,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:33,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:33,167 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:33,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:33,168 INFO L85 PathProgramCache]: Analyzing trace with hash -961610825, now seen corresponding path program 1 times [2022-11-03 02:07:33,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:33,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167618664] [2022-11-03 02:07:33,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:33,169 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:33,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:33,170 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:33,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:07:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:34,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:07:34,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:34,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:34,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:34,279 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:34,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167618664] [2022-11-03 02:07:34,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167618664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:34,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:34,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:34,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370100709] [2022-11-03 02:07:34,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:34,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:34,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:34,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:34,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:34,281 INFO L87 Difference]: Start difference. First operand 125 states and 178 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:34,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:34,477 INFO L93 Difference]: Finished difference Result 238 states and 344 transitions. [2022-11-03 02:07:34,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:07:34,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-03 02:07:34,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:34,478 INFO L225 Difference]: With dead ends: 238 [2022-11-03 02:07:34,478 INFO L226 Difference]: Without dead ends: 125 [2022-11-03 02:07:34,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:34,480 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 148 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:34,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 257 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:07:34,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-03 02:07:34,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-11-03 02:07:34,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.4274193548387097) internal successors, (177), 124 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) [2022-11-03 02:07:34,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 177 transitions. [2022-11-03 02:07:34,487 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 177 transitions. Word has length 116 [2022-11-03 02:07:34,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:34,487 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 177 transitions. [2022-11-03 02:07:34,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:34,488 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 177 transitions. [2022-11-03 02:07:34,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:07:34,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:34,489 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:34,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:34,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:34,703 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:34,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:34,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1299962425, now seen corresponding path program 1 times [2022-11-03 02:07:34,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:34,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806838900] [2022-11-03 02:07:34,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:34,705 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:34,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:34,706 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:34,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:07:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:35,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:07:35,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:35,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:35,956 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:35,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1806838900] [2022-11-03 02:07:35,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1806838900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:35,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:35,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:35,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446626876] [2022-11-03 02:07:35,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:35,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:35,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:35,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:35,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:35,959 INFO L87 Difference]: Start difference. First operand 125 states and 177 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:36,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:36,481 INFO L93 Difference]: Finished difference Result 333 states and 483 transitions. [2022-11-03 02:07:36,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:07:36,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-03 02:07:36,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:36,483 INFO L225 Difference]: With dead ends: 333 [2022-11-03 02:07:36,483 INFO L226 Difference]: Without dead ends: 220 [2022-11-03 02:07:36,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:36,484 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 138 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:36,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 373 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:07:36,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-03 02:07:36,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 129. [2022-11-03 02:07:36,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.4140625) internal successors, (181), 128 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) [2022-11-03 02:07:36,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 181 transitions. [2022-11-03 02:07:36,491 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 181 transitions. Word has length 116 [2022-11-03 02:07:36,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:36,492 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 181 transitions. [2022-11-03 02:07:36,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:36,492 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 181 transitions. [2022-11-03 02:07:36,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:07:36,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:36,494 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:36,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:36,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:36,723 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:36,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:36,724 INFO L85 PathProgramCache]: Analyzing trace with hash -7179973, now seen corresponding path program 1 times [2022-11-03 02:07:36,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:36,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53332994] [2022-11-03 02:07:36,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:36,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:36,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:36,726 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:36,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:07:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:37,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:07:37,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:37,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:37,808 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:37,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53332994] [2022-11-03 02:07:37,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53332994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:37,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:37,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:37,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295137496] [2022-11-03 02:07:37,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:37,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:37,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:37,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:37,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:37,812 INFO L87 Difference]: Start difference. First operand 129 states and 181 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:37,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:37,951 INFO L93 Difference]: Finished difference Result 242 states and 346 transitions. [2022-11-03 02:07:37,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:07:37,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-03 02:07:37,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:37,952 INFO L225 Difference]: With dead ends: 242 [2022-11-03 02:07:37,952 INFO L226 Difference]: Without dead ends: 129 [2022-11-03 02:07:37,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:37,953 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 143 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:37,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 257 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:07:37,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-03 02:07:37,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-11-03 02:07:37,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.40625) internal successors, (180), 128 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:37,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 180 transitions. [2022-11-03 02:07:37,958 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 180 transitions. Word has length 116 [2022-11-03 02:07:37,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:37,959 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 180 transitions. [2022-11-03 02:07:37,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:37,959 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 180 transitions. [2022-11-03 02:07:37,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:07:37,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:37,960 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:37,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:38,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:38,174 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:38,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:38,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1023860925, now seen corresponding path program 1 times [2022-11-03 02:07:38,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:38,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017852467] [2022-11-03 02:07:38,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:38,176 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:38,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:38,177 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:38,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:07:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:39,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:07:39,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:39,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:39,349 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:39,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017852467] [2022-11-03 02:07:39,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017852467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:39,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:39,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:39,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097673666] [2022-11-03 02:07:39,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:39,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:39,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:39,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:39,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:39,352 INFO L87 Difference]: Start difference. First operand 129 states and 180 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:39,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:39,904 INFO L93 Difference]: Finished difference Result 333 states and 479 transitions. [2022-11-03 02:07:39,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:07:39,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-03 02:07:39,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:39,912 INFO L225 Difference]: With dead ends: 333 [2022-11-03 02:07:39,912 INFO L226 Difference]: Without dead ends: 220 [2022-11-03 02:07:39,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:39,913 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 132 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:39,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 371 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:07:39,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-03 02:07:39,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 133. [2022-11-03 02:07:39,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.393939393939394) internal successors, (184), 132 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:39,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 184 transitions. [2022-11-03 02:07:39,919 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 184 transitions. Word has length 116 [2022-11-03 02:07:39,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:39,920 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 184 transitions. [2022-11-03 02:07:39,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:39,920 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 184 transitions. [2022-11-03 02:07:39,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:07:39,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:39,922 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:39,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:40,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:40,135 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:40,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:40,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1670035265, now seen corresponding path program 1 times [2022-11-03 02:07:40,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:40,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919704642] [2022-11-03 02:07:40,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:40,136 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:40,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:40,138 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:40,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:07:40,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:40,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:07:40,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:41,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:41,651 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:41,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919704642] [2022-11-03 02:07:41,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919704642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:41,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:41,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:07:41,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381438739] [2022-11-03 02:07:41,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:41,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:07:41,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:41,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:07:41,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:07:41,653 INFO L87 Difference]: Start difference. First operand 133 states and 184 transitions. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:43,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:43,389 INFO L93 Difference]: Finished difference Result 474 states and 678 transitions. [2022-11-03 02:07:43,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:07:43,389 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-03 02:07:43,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:43,391 INFO L225 Difference]: With dead ends: 474 [2022-11-03 02:07:43,391 INFO L226 Difference]: Without dead ends: 361 [2022-11-03 02:07:43,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:07:43,393 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 881 mSDsluCounter, 1329 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:43,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [881 Valid, 1455 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 02:07:43,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-11-03 02:07:43,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 139. [2022-11-03 02:07:43,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.391304347826087) internal successors, (192), 138 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:43,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 192 transitions. [2022-11-03 02:07:43,402 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 192 transitions. Word has length 116 [2022-11-03 02:07:43,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:43,402 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 192 transitions. [2022-11-03 02:07:43,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:43,403 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 192 transitions. [2022-11-03 02:07:43,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:07:43,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:43,405 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:43,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:43,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:43,618 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:43,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:43,618 INFO L85 PathProgramCache]: Analyzing trace with hash 684350017, now seen corresponding path program 1 times [2022-11-03 02:07:43,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:43,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625029799] [2022-11-03 02:07:43,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:43,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:43,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:43,621 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:43,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:07:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:44,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:07:44,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:45,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:45,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:45,122 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:45,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625029799] [2022-11-03 02:07:45,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625029799] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:45,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:45,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:07:45,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711347114] [2022-11-03 02:07:45,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:45,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:07:45,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:45,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:07:45,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:07:45,125 INFO L87 Difference]: Start difference. First operand 139 states and 192 transitions. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:46,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:46,765 INFO L93 Difference]: Finished difference Result 470 states and 671 transitions. [2022-11-03 02:07:46,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:07:46,766 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-03 02:07:46,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:46,767 INFO L225 Difference]: With dead ends: 470 [2022-11-03 02:07:46,768 INFO L226 Difference]: Without dead ends: 357 [2022-11-03 02:07:46,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:07:46,769 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 858 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:46,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 1451 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 02:07:46,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-11-03 02:07:46,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 143. [2022-11-03 02:07:46,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.3873239436619718) internal successors, (197), 142 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:46,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 197 transitions. [2022-11-03 02:07:46,776 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 197 transitions. Word has length 116 [2022-11-03 02:07:46,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:46,776 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 197 transitions. [2022-11-03 02:07:46,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:46,777 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 197 transitions. [2022-11-03 02:07:46,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:07:46,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:46,778 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:46,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:47,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:47,003 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:47,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:47,003 INFO L85 PathProgramCache]: Analyzing trace with hash 98073795, now seen corresponding path program 1 times [2022-11-03 02:07:47,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:47,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380555453] [2022-11-03 02:07:47,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:47,005 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:47,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:47,006 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:47,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:07:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:47,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:07:47,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:48,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:48,340 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:48,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380555453] [2022-11-03 02:07:48,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380555453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:48,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:48,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:07:48,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710253184] [2022-11-03 02:07:48,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:48,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:07:48,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:48,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:07:48,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:07:48,342 INFO L87 Difference]: Start difference. First operand 143 states and 197 transitions. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:49,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:49,959 INFO L93 Difference]: Finished difference Result 466 states and 665 transitions. [2022-11-03 02:07:49,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:07:49,960 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-03 02:07:49,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:49,961 INFO L225 Difference]: With dead ends: 466 [2022-11-03 02:07:49,961 INFO L226 Difference]: Without dead ends: 353 [2022-11-03 02:07:49,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:07:49,962 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 838 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:49,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [838 Valid, 1444 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 02:07:49,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-03 02:07:49,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 147. [2022-11-03 02:07:49,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.3835616438356164) internal successors, (202), 146 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:49,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 202 transitions. [2022-11-03 02:07:49,970 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 202 transitions. Word has length 116 [2022-11-03 02:07:49,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:49,971 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 202 transitions. [2022-11-03 02:07:49,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:49,971 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 202 transitions. [2022-11-03 02:07:49,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:07:49,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:49,973 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:50,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-03 02:07:50,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:50,187 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:50,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:50,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1422929989, now seen corresponding path program 1 times [2022-11-03 02:07:50,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:50,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973949950] [2022-11-03 02:07:50,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:50,189 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:50,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:50,190 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:50,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:07:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:51,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:07:51,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:51,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:51,358 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:51,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973949950] [2022-11-03 02:07:51,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973949950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:51,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:51,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:51,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36441186] [2022-11-03 02:07:51,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:51,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:51,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:51,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:51,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:51,360 INFO L87 Difference]: Start difference. First operand 147 states and 202 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:51,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:51,983 INFO L93 Difference]: Finished difference Result 445 states and 637 transitions. [2022-11-03 02:07:51,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:07:51,984 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-03 02:07:51,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:51,985 INFO L225 Difference]: With dead ends: 445 [2022-11-03 02:07:51,985 INFO L226 Difference]: Without dead ends: 332 [2022-11-03 02:07:51,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:51,987 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 370 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:51,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 549 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:07:51,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-11-03 02:07:51,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 149. [2022-11-03 02:07:51,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.3783783783783783) internal successors, (204), 148 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:51,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 204 transitions. [2022-11-03 02:07:51,993 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 204 transitions. Word has length 116 [2022-11-03 02:07:51,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:51,994 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 204 transitions. [2022-11-03 02:07:51,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:51,994 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 204 transitions. [2022-11-03 02:07:51,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:07:51,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:51,996 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:52,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:52,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:52,211 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:52,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:52,211 INFO L85 PathProgramCache]: Analyzing trace with hash 365091911, now seen corresponding path program 1 times [2022-11-03 02:07:52,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:52,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278773164] [2022-11-03 02:07:52,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:52,212 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:52,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:52,213 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:52,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:07:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:52,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:07:53,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:53,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:53,284 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:53,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278773164] [2022-11-03 02:07:53,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278773164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:53,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:53,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:07:53,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476997707] [2022-11-03 02:07:53,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:53,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:07:53,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:53,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:07:53,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:53,286 INFO L87 Difference]: Start difference. First operand 149 states and 204 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:53,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:53,914 INFO L93 Difference]: Finished difference Result 486 states and 692 transitions. [2022-11-03 02:07:53,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:07:53,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-03 02:07:53,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:53,927 INFO L225 Difference]: With dead ends: 486 [2022-11-03 02:07:53,928 INFO L226 Difference]: Without dead ends: 373 [2022-11-03 02:07:53,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:07:53,929 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 550 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:53,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 830 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:07:53,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-11-03 02:07:53,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 157. [2022-11-03 02:07:53,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.3782051282051282) internal successors, (215), 156 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:53,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 215 transitions. [2022-11-03 02:07:53,937 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 215 transitions. Word has length 116 [2022-11-03 02:07:53,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:53,938 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 215 transitions. [2022-11-03 02:07:53,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:53,938 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 215 transitions. [2022-11-03 02:07:53,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:07:53,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:53,940 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:53,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:54,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:54,147 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:54,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:54,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1545950647, now seen corresponding path program 1 times [2022-11-03 02:07:54,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:54,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776161410] [2022-11-03 02:07:54,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:54,149 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:54,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:54,150 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:54,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:07:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:54,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:07:54,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:55,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:55,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:55,354 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:55,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776161410] [2022-11-03 02:07:55,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776161410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:55,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:55,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:55,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229614195] [2022-11-03 02:07:55,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:55,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:55,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:55,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:55,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:55,358 INFO L87 Difference]: Start difference. First operand 157 states and 215 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:55,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:55,868 INFO L93 Difference]: Finished difference Result 445 states and 635 transitions. [2022-11-03 02:07:55,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:07:55,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-03 02:07:55,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:55,870 INFO L225 Difference]: With dead ends: 445 [2022-11-03 02:07:55,870 INFO L226 Difference]: Without dead ends: 332 [2022-11-03 02:07:55,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:55,871 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 338 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:55,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 574 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:07:55,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-11-03 02:07:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 161. [2022-11-03 02:07:55,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.375) internal successors, (220), 160 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:55,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 220 transitions. [2022-11-03 02:07:55,880 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 220 transitions. Word has length 116 [2022-11-03 02:07:55,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:55,880 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 220 transitions. [2022-11-03 02:07:55,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:55,881 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 220 transitions. [2022-11-03 02:07:55,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:07:55,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:55,882 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:55,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-11-03 02:07:56,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:56,099 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:56,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:56,099 INFO L85 PathProgramCache]: Analyzing trace with hash -2038576821, now seen corresponding path program 1 times [2022-11-03 02:07:56,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:56,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191411581] [2022-11-03 02:07:56,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:56,101 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:56,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:56,102 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:56,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:07:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:56,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:07:56,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:57,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:57,732 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:57,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191411581] [2022-11-03 02:07:57,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191411581] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:57,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:57,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:07:57,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465118462] [2022-11-03 02:07:57,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:57,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:07:57,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:57,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:07:57,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:07:57,735 INFO L87 Difference]: Start difference. First operand 161 states and 220 transitions. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:59,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:59,498 INFO L93 Difference]: Finished difference Result 498 states and 708 transitions. [2022-11-03 02:07:59,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:07:59,507 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-03 02:07:59,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:59,508 INFO L225 Difference]: With dead ends: 498 [2022-11-03 02:07:59,508 INFO L226 Difference]: Without dead ends: 385 [2022-11-03 02:07:59,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:07:59,509 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 983 mSDsluCounter, 1526 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 1683 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:59,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 1683 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 02:07:59,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-03 02:07:59,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 163. [2022-11-03 02:07:59,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.3703703703703705) internal successors, (222), 162 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:59,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 222 transitions. [2022-11-03 02:07:59,520 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 222 transitions. Word has length 116 [2022-11-03 02:07:59,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:59,520 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 222 transitions. [2022-11-03 02:07:59,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:59,521 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 222 transitions. [2022-11-03 02:07:59,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:07:59,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:59,522 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:59,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:59,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:59,747 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:59,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:59,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1040236749, now seen corresponding path program 1 times [2022-11-03 02:07:59,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:59,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289830200] [2022-11-03 02:07:59,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:59,749 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:59,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:59,750 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:59,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:08:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:00,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:08:00,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:00,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:00,871 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:00,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289830200] [2022-11-03 02:08:00,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289830200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:00,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:00,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:08:00,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140691489] [2022-11-03 02:08:00,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:00,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:08:00,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:00,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:08:00,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:08:00,873 INFO L87 Difference]: Start difference. First operand 163 states and 222 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:01,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:01,370 INFO L93 Difference]: Finished difference Result 498 states and 707 transitions. [2022-11-03 02:08:01,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:08:01,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-03 02:08:01,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:01,374 INFO L225 Difference]: With dead ends: 498 [2022-11-03 02:08:01,374 INFO L226 Difference]: Without dead ends: 385 [2022-11-03 02:08:01,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:08:01,376 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 544 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:01,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 866 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:08:01,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-03 02:08:01,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 165. [2022-11-03 02:08:01,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.3658536585365855) internal successors, (224), 164 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:01,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 224 transitions. [2022-11-03 02:08:01,384 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 224 transitions. Word has length 116 [2022-11-03 02:08:01,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:01,385 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 224 transitions. [2022-11-03 02:08:01,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:01,385 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 224 transitions. [2022-11-03 02:08:01,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:08:01,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:01,386 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:01,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:01,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:08:01,612 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:01,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:01,613 INFO L85 PathProgramCache]: Analyzing trace with hash -645943089, now seen corresponding path program 1 times [2022-11-03 02:08:01,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:01,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828245173] [2022-11-03 02:08:01,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:01,614 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:01,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:01,615 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:01,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:08:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:02,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:08:02,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:02,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:02,726 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:02,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828245173] [2022-11-03 02:08:02,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828245173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:02,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:02,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:08:02,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525545364] [2022-11-03 02:08:02,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:02,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:08:02,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:02,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:08:02,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:08:02,728 INFO L87 Difference]: Start difference. First operand 165 states and 224 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:03,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:03,316 INFO L93 Difference]: Finished difference Result 498 states and 706 transitions. [2022-11-03 02:08:03,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:08:03,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-03 02:08:03,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:03,319 INFO L225 Difference]: With dead ends: 498 [2022-11-03 02:08:03,319 INFO L226 Difference]: Without dead ends: 385 [2022-11-03 02:08:03,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:08:03,319 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 532 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:03,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 855 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:08:03,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-03 02:08:03,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 169. [2022-11-03 02:08:03,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.3630952380952381) internal successors, (229), 168 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:03,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 229 transitions. [2022-11-03 02:08:03,328 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 229 transitions. Word has length 116 [2022-11-03 02:08:03,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:03,328 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 229 transitions. [2022-11-03 02:08:03,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:03,328 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 229 transitions. [2022-11-03 02:08:03,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:08:03,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:03,329 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:03,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:03,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:08:03,551 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:03,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:03,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1315631569, now seen corresponding path program 1 times [2022-11-03 02:08:03,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:03,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [720383745] [2022-11-03 02:08:03,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:03,552 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:03,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:03,553 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:03,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:08:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:04,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:08:04,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:05,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:05,032 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:05,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [720383745] [2022-11-03 02:08:05,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [720383745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:05,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:05,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:08:05,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077007562] [2022-11-03 02:08:05,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:05,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:08:05,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:05,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:08:05,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:08:05,035 INFO L87 Difference]: Start difference. First operand 169 states and 229 transitions. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:06,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:06,855 INFO L93 Difference]: Finished difference Result 498 states and 705 transitions. [2022-11-03 02:08:06,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:08:06,856 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-03 02:08:06,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:06,858 INFO L225 Difference]: With dead ends: 498 [2022-11-03 02:08:06,858 INFO L226 Difference]: Without dead ends: 385 [2022-11-03 02:08:06,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:08:06,859 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 945 mSDsluCounter, 1481 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:06,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [945 Valid, 1657 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 02:08:06,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-03 02:08:06,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 171. [2022-11-03 02:08:06,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.3588235294117648) internal successors, (231), 170 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:06,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 231 transitions. [2022-11-03 02:08:06,867 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 231 transitions. Word has length 116 [2022-11-03 02:08:06,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:06,867 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 231 transitions. [2022-11-03 02:08:06,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:06,868 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 231 transitions. [2022-11-03 02:08:06,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:08:06,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:06,869 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:06,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:07,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:08:07,089 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:07,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:07,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1876331347, now seen corresponding path program 1 times [2022-11-03 02:08:07,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:07,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681242419] [2022-11-03 02:08:07,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:07,091 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:07,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:07,092 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:07,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:08:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:07,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:08:07,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:08,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:08,239 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:08,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681242419] [2022-11-03 02:08:08,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681242419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:08,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:08,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:08:08,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497182523] [2022-11-03 02:08:08,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:08,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:08:08,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:08,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:08:08,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:08:08,241 INFO L87 Difference]: Start difference. First operand 171 states and 231 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:08,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:08,366 INFO L93 Difference]: Finished difference Result 284 states and 395 transitions. [2022-11-03 02:08:08,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:08:08,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-03 02:08:08,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:08,367 INFO L225 Difference]: With dead ends: 284 [2022-11-03 02:08:08,367 INFO L226 Difference]: Without dead ends: 171 [2022-11-03 02:08:08,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:08:08,368 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 86 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:08,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 257 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:08:08,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-03 02:08:08,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-11-03 02:08:08,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.3529411764705883) internal successors, (230), 170 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:08,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 230 transitions. [2022-11-03 02:08:08,385 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 230 transitions. Word has length 116 [2022-11-03 02:08:08,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:08,385 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 230 transitions. [2022-11-03 02:08:08,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:08,386 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 230 transitions. [2022-11-03 02:08:08,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:08:08,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:08,387 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:08,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-11-03 02:08:08,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:08:08,595 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:08,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:08,595 INFO L85 PathProgramCache]: Analyzing trace with hash 978938069, now seen corresponding path program 1 times [2022-11-03 02:08:08,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:08,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184743268] [2022-11-03 02:08:08,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:08,596 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:08,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:08,598 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:08,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:08:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:09,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:08:09,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:09,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:09,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:09,985 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:09,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1184743268] [2022-11-03 02:08:09,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1184743268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:09,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:09,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:08:09,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590911659] [2022-11-03 02:08:09,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:09,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:08:09,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:09,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:08:09,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:08:09,987 INFO L87 Difference]: Start difference. First operand 171 states and 230 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:10,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:10,166 INFO L93 Difference]: Finished difference Result 342 states and 469 transitions. [2022-11-03 02:08:10,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:08:10,167 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-03 02:08:10,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:10,168 INFO L225 Difference]: With dead ends: 342 [2022-11-03 02:08:10,168 INFO L226 Difference]: Without dead ends: 229 [2022-11-03 02:08:10,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:10,169 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 17 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:10,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 538 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-11-03 02:08:10,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-11-03 02:08:10,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-11-03 02:08:10,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.337719298245614) internal successors, (305), 228 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:10,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 305 transitions. [2022-11-03 02:08:10,178 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 305 transitions. Word has length 116 [2022-11-03 02:08:10,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:10,178 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 305 transitions. [2022-11-03 02:08:10,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:10,178 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 305 transitions. [2022-11-03 02:08:10,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:08:10,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:10,179 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:10,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:10,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:08:10,380 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:10,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:10,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1638469591, now seen corresponding path program 1 times [2022-11-03 02:08:10,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:10,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020765687] [2022-11-03 02:08:10,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:10,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:10,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:10,382 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:10,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:08:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:11,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:08:11,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:11,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:11,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:11,632 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:11,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020765687] [2022-11-03 02:08:11,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020765687] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:11,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:11,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:08:11,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876013860] [2022-11-03 02:08:11,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:11,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:08:11,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:11,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:08:11,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:08:11,634 INFO L87 Difference]: Start difference. First operand 229 states and 305 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:11,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:11,767 INFO L93 Difference]: Finished difference Result 342 states and 468 transitions. [2022-11-03 02:08:11,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:08:11,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-03 02:08:11,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:11,772 INFO L225 Difference]: With dead ends: 342 [2022-11-03 02:08:11,772 INFO L226 Difference]: Without dead ends: 229 [2022-11-03 02:08:11,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:08:11,773 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 77 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:11,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 257 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:08:11,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-11-03 02:08:11,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-11-03 02:08:11,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.3333333333333333) internal successors, (304), 228 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:11,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 304 transitions. [2022-11-03 02:08:11,782 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 304 transitions. Word has length 116 [2022-11-03 02:08:11,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:11,786 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 304 transitions. [2022-11-03 02:08:11,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:11,787 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 304 transitions. [2022-11-03 02:08:11,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:08:11,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:11,788 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:11,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:12,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:08:12,011 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:12,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:12,011 INFO L85 PathProgramCache]: Analyzing trace with hash 794464089, now seen corresponding path program 1 times [2022-11-03 02:08:12,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:12,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006368462] [2022-11-03 02:08:12,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:12,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:12,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:12,013 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:12,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:08:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:12,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:08:12,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:13,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:13,318 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:13,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006368462] [2022-11-03 02:08:13,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006368462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:13,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:13,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:08:13,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274753435] [2022-11-03 02:08:13,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:13,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:08:13,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:13,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:08:13,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:08:13,322 INFO L87 Difference]: Start difference. First operand 229 states and 304 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:13,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:13,440 INFO L93 Difference]: Finished difference Result 350 states and 477 transitions. [2022-11-03 02:08:13,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:08:13,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-03 02:08:13,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:13,442 INFO L225 Difference]: With dead ends: 350 [2022-11-03 02:08:13,442 INFO L226 Difference]: Without dead ends: 237 [2022-11-03 02:08:13,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:13,443 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 19 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:13,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 535 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-03 02:08:13,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-03 02:08:13,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2022-11-03 02:08:13,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.3305084745762712) internal successors, (314), 236 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:13,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 314 transitions. [2022-11-03 02:08:13,456 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 314 transitions. Word has length 116 [2022-11-03 02:08:13,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:13,456 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 314 transitions. [2022-11-03 02:08:13,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:13,457 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 314 transitions. [2022-11-03 02:08:13,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:08:13,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:13,458 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:13,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:13,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:08:13,679 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:13,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:13,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2114299813, now seen corresponding path program 1 times [2022-11-03 02:08:13,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:13,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [675499087] [2022-11-03 02:08:13,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:13,681 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:13,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:13,682 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:13,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 02:08:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:14,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:08:14,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:14,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:14,930 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:14,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [675499087] [2022-11-03 02:08:14,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [675499087] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:14,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:14,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:08:14,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623133743] [2022-11-03 02:08:14,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:14,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:08:14,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:14,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:08:14,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:08:14,932 INFO L87 Difference]: Start difference. First operand 237 states and 314 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:15,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:15,058 INFO L93 Difference]: Finished difference Result 350 states and 476 transitions. [2022-11-03 02:08:15,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:08:15,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-03 02:08:15,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:15,061 INFO L225 Difference]: With dead ends: 350 [2022-11-03 02:08:15,062 INFO L226 Difference]: Without dead ends: 237 [2022-11-03 02:08:15,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:08:15,063 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 68 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:15,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 257 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:08:15,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-03 02:08:15,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2022-11-03 02:08:15,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.326271186440678) internal successors, (313), 236 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:15,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 313 transitions. [2022-11-03 02:08:15,071 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 313 transitions. Word has length 116 [2022-11-03 02:08:15,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:15,072 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 313 transitions. [2022-11-03 02:08:15,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:15,072 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 313 transitions. [2022-11-03 02:08:15,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:08:15,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:15,073 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:15,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:15,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:08:15,286 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:15,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:15,287 INFO L85 PathProgramCache]: Analyzing trace with hash -191071779, now seen corresponding path program 1 times [2022-11-03 02:08:15,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:15,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187833682] [2022-11-03 02:08:15,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:15,288 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:15,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:15,290 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:15,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:08:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:16,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:08:16,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:16,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:16,336 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:16,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187833682] [2022-11-03 02:08:16,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187833682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:16,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:16,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:08:16,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344020048] [2022-11-03 02:08:16,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:16,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:08:16,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:16,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:08:16,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:08:16,338 INFO L87 Difference]: Start difference. First operand 237 states and 313 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:16,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:16,760 INFO L93 Difference]: Finished difference Result 552 states and 759 transitions. [2022-11-03 02:08:16,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:08:16,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-03 02:08:16,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:16,762 INFO L225 Difference]: With dead ends: 552 [2022-11-03 02:08:16,762 INFO L226 Difference]: Without dead ends: 439 [2022-11-03 02:08:16,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:08:16,763 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 399 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:16,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 750 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:08:16,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-11-03 02:08:16,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 275. [2022-11-03 02:08:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.3357664233576643) internal successors, (366), 274 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:16,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 366 transitions. [2022-11-03 02:08:16,773 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 366 transitions. Word has length 116 [2022-11-03 02:08:16,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:16,774 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 366 transitions. [2022-11-03 02:08:16,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:16,774 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 366 transitions. [2022-11-03 02:08:16,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:08:16,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:16,775 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:16,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-03 02:08:16,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:08:16,995 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:16,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:16,995 INFO L85 PathProgramCache]: Analyzing trace with hash 231630047, now seen corresponding path program 1 times [2022-11-03 02:08:16,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:16,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106743512] [2022-11-03 02:08:16,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:16,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:16,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:16,998 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:17,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 02:08:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:17,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:08:17,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:18,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:18,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:18,047 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:18,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106743512] [2022-11-03 02:08:18,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106743512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:18,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:18,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:08:18,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605519814] [2022-11-03 02:08:18,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:18,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:08:18,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:18,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:08:18,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:08:18,049 INFO L87 Difference]: Start difference. First operand 275 states and 366 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:18,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:18,514 INFO L93 Difference]: Finished difference Result 552 states and 758 transitions. [2022-11-03 02:08:18,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:08:18,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-03 02:08:18,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:18,521 INFO L225 Difference]: With dead ends: 552 [2022-11-03 02:08:18,521 INFO L226 Difference]: Without dead ends: 439 [2022-11-03 02:08:18,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:08:18,522 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 387 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:18,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 741 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:08:18,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-11-03 02:08:18,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 279. [2022-11-03 02:08:18,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.3345323741007193) internal successors, (371), 278 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:18,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 371 transitions. [2022-11-03 02:08:18,536 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 371 transitions. Word has length 116 [2022-11-03 02:08:18,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:18,536 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 371 transitions. [2022-11-03 02:08:18,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:18,537 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 371 transitions. [2022-11-03 02:08:18,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:08:18,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:18,538 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:18,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:18,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:08:18,754 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:18,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:18,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1356717855, now seen corresponding path program 1 times [2022-11-03 02:08:18,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:18,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445651222] [2022-11-03 02:08:18,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:18,756 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:18,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:18,756 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:18,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 02:08:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:19,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:08:19,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:20,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:21,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:21,142 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:21,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445651222] [2022-11-03 02:08:21,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445651222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:21,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [551296154] [2022-11-03 02:08:21,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:21,143 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:08:21,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:08:21,146 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:08:21,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-03 02:08:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:22,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:08:22,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:23,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:24,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [551296154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:24,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740335145] [2022-11-03 02:08:24,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:24,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:24,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:24,005 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:24,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-03 02:08:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:24,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:08:24,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:25,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:25,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:26,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740335145] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:26,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:08:26,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 28 [2022-11-03 02:08:26,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833683835] [2022-11-03 02:08:26,462 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:08:26,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:08:26,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:26,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:08:26,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:08:26,464 INFO L87 Difference]: Start difference. First operand 279 states and 371 transitions. Second operand has 28 states, 28 states have (on average 13.678571428571429) internal successors, (383), 28 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:27,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:27,167 INFO L93 Difference]: Finished difference Result 513 states and 692 transitions. [2022-11-03 02:08:27,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:08:27,168 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 13.678571428571429) internal successors, (383), 28 states have internal predecessors, (383), 0 states have call successors, (0), 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 116 [2022-11-03 02:08:27,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:27,170 INFO L225 Difference]: With dead ends: 513 [2022-11-03 02:08:27,170 INFO L226 Difference]: Without dead ends: 400 [2022-11-03 02:08:27,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 663 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:08:27,173 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 392 mSDsluCounter, 1949 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 2089 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:27,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 2089 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 124 Unchecked, 0.3s Time] [2022-11-03 02:08:27,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-11-03 02:08:27,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2022-11-03 02:08:27,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.3283208020050126) internal successors, (530), 399 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:27,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 530 transitions. [2022-11-03 02:08:27,186 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 530 transitions. Word has length 116 [2022-11-03 02:08:27,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:27,186 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 530 transitions. [2022-11-03 02:08:27,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 13.678571428571429) internal successors, (383), 28 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:27,187 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 530 transitions. [2022-11-03 02:08:27,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:08:27,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:27,188 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:27,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:27,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:27,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-11-03 02:08:27,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:27,802 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:27,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:27,802 INFO L85 PathProgramCache]: Analyzing trace with hash 2128902815, now seen corresponding path program 1 times [2022-11-03 02:08:27,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:27,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820672567] [2022-11-03 02:08:27,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:27,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:27,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:27,804 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:27,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 02:08:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:28,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:08:28,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:29,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:30,070 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:30,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820672567] [2022-11-03 02:08:30,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820672567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:30,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [482779965] [2022-11-03 02:08:30,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:30,071 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:08:30,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:08:30,075 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:08:30,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-03 02:08:31,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:31,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:08:31,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:32,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:32,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:32,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [482779965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:32,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884240084] [2022-11-03 02:08:32,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:32,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:32,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:32,906 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:32,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-03 02:08:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:33,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:08:33,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:34,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:34,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:35,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884240084] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:35,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:08:35,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 28 [2022-11-03 02:08:35,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083298784] [2022-11-03 02:08:35,324 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:08:35,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:08:35,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:35,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:08:35,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:08:35,326 INFO L87 Difference]: Start difference. First operand 400 states and 530 transitions. Second operand has 28 states, 28 states have (on average 13.75) internal successors, (385), 28 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:36,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:36,231 INFO L93 Difference]: Finished difference Result 747 states and 998 transitions. [2022-11-03 02:08:36,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:08:36,233 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 13.75) internal successors, (385), 28 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-11-03 02:08:36,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:36,237 INFO L225 Difference]: With dead ends: 747 [2022-11-03 02:08:36,237 INFO L226 Difference]: Without dead ends: 634 [2022-11-03 02:08:36,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 663 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 02:08:36,239 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 444 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 2002 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:36,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 2002 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 154 Unchecked, 0.2s Time] [2022-11-03 02:08:36,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-11-03 02:08:36,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 634. [2022-11-03 02:08:36,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 1.315955766192733) internal successors, (833), 633 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:36,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 833 transitions. [2022-11-03 02:08:36,270 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 833 transitions. Word has length 116 [2022-11-03 02:08:36,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:36,271 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 833 transitions. [2022-11-03 02:08:36,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 13.75) internal successors, (385), 28 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:36,272 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 833 transitions. [2022-11-03 02:08:36,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:08:36,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:36,274 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:36,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:36,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:36,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:36,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:08:36,887 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:36,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:36,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1970898787, now seen corresponding path program 1 times [2022-11-03 02:08:36,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:36,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360831290] [2022-11-03 02:08:36,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:36,889 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:36,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:36,890 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:36,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 02:08:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:37,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:08:37,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:38,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:38,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:38,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:38,989 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:38,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360831290] [2022-11-03 02:08:38,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360831290] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:38,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1108720104] [2022-11-03 02:08:38,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:38,990 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:08:38,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:08:38,991 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:08:38,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-03 02:08:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:40,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:08:40,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:41,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:41,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1108720104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:41,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216561426] [2022-11-03 02:08:41,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:41,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:41,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:41,643 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:41,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-03 02:08:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:42,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:08:42,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:43,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:43,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:43,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216561426] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:43,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:08:43,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 28 [2022-11-03 02:08:43,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740757613] [2022-11-03 02:08:43,947 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:08:43,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:08:43,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:43,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:08:43,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:08:43,949 INFO L87 Difference]: Start difference. First operand 634 states and 833 transitions. Second operand has 28 states, 28 states have (on average 13.535714285714286) internal successors, (379), 28 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:44,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:44,850 INFO L93 Difference]: Finished difference Result 852 states and 1132 transitions. [2022-11-03 02:08:44,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:08:44,851 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 13.535714285714286) internal successors, (379), 28 states have internal predecessors, (379), 0 states have call successors, (0), 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 116 [2022-11-03 02:08:44,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:44,852 INFO L225 Difference]: With dead ends: 852 [2022-11-03 02:08:44,852 INFO L226 Difference]: Without dead ends: 739 [2022-11-03 02:08:44,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 663 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:08:44,854 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 350 mSDsluCounter, 2168 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 2308 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:44,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 2308 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 128 Unchecked, 0.4s Time] [2022-11-03 02:08:44,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-11-03 02:08:44,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 634. [2022-11-03 02:08:44,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 1.315955766192733) internal successors, (833), 633 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:44,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 833 transitions. [2022-11-03 02:08:44,876 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 833 transitions. Word has length 116 [2022-11-03 02:08:44,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:44,877 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 833 transitions. [2022-11-03 02:08:44,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 13.535714285714286) internal successors, (379), 28 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:44,877 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 833 transitions. [2022-11-03 02:08:44,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:08:44,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:44,879 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:44,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:45,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:45,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-11-03 02:08:45,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:08:45,501 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:45,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:45,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1161552161, now seen corresponding path program 1 times [2022-11-03 02:08:45,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:45,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1056096837] [2022-11-03 02:08:45,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:45,502 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:45,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:45,503 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:45,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 02:08:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:46,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:08:46,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:46,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:46,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:47,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:47,686 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:47,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1056096837] [2022-11-03 02:08:47,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1056096837] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:47,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [605917565] [2022-11-03 02:08:47,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:47,687 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:08:47,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:08:47,688 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:08:47,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-03 02:08:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:49,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:08:49,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:49,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:50,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [605917565] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:50,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464780023] [2022-11-03 02:08:50,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:50,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:50,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:50,359 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:50,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-03 02:08:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:50,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:08:50,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:51,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:51,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:51,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464780023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:51,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:08:51,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 02:08:51,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758691964] [2022-11-03 02:08:51,965 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:08:51,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:08:51,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:51,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:08:51,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:08:51,967 INFO L87 Difference]: Start difference. First operand 634 states and 833 transitions. Second operand has 16 states, 16 states have (on average 14.1875) internal successors, (227), 16 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:52,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:52,430 INFO L93 Difference]: Finished difference Result 998 states and 1326 transitions. [2022-11-03 02:08:52,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:08:52,432 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 14.1875) internal successors, (227), 16 states have internal predecessors, (227), 0 states have call successors, (0), 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 116 [2022-11-03 02:08:52,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:52,434 INFO L225 Difference]: With dead ends: 998 [2022-11-03 02:08:52,434 INFO L226 Difference]: Without dead ends: 885 [2022-11-03 02:08:52,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 672 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:08:52,435 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 301 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1357 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:52,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 1357 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 104 Unchecked, 0.3s Time] [2022-11-03 02:08:52,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-11-03 02:08:52,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 848. [2022-11-03 02:08:52,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 1.3128689492325856) internal successors, (1112), 847 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:52,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1112 transitions. [2022-11-03 02:08:52,465 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1112 transitions. Word has length 116 [2022-11-03 02:08:52,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:52,466 INFO L495 AbstractCegarLoop]: Abstraction has 848 states and 1112 transitions. [2022-11-03 02:08:52,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.1875) internal successors, (227), 16 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:52,466 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1112 transitions. [2022-11-03 02:08:52,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:08:52,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:52,468 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:52,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:52,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:52,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:53,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:53,082 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:53,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:53,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1218810463, now seen corresponding path program 1 times [2022-11-03 02:08:53,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:53,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814215453] [2022-11-03 02:08:53,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:53,084 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:53,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:53,085 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:53,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 02:08:53,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:53,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:08:53,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:55,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:01,143 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:01,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814215453] [2022-11-03 02:09:01,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814215453] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:01,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2055837086] [2022-11-03 02:09:01,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:01,144 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:09:01,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:09:01,145 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:09:01,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-03 02:09:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:02,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:09:02,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:04,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:04,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:02,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:02,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2055837086] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:10:02,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709836484] [2022-11-03 02:10:02,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:02,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:10:02,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:10:02,425 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:10:02,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-03 02:10:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:03,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:10:03,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:10:04,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:10:09,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709836484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:10:09,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:10:09,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 40 [2022-11-03 02:10:09,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284218308] [2022-11-03 02:10:09,635 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:10:09,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:10:09,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:09,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:10:09,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1332, Unknown=25, NotChecked=0, Total=1560 [2022-11-03 02:10:09,637 INFO L87 Difference]: Start difference. First operand 848 states and 1112 transitions. Second operand has 40 states, 40 states have (on average 14.05) internal successors, (562), 40 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:12,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:12,644 INFO L93 Difference]: Finished difference Result 1334 states and 1766 transitions. [2022-11-03 02:10:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 02:10:12,645 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 14.05) internal successors, (562), 40 states have internal predecessors, (562), 0 states have call successors, (0), 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 116 [2022-11-03 02:10:12,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:12,649 INFO L225 Difference]: With dead ends: 1334 [2022-11-03 02:10:12,649 INFO L226 Difference]: Without dead ends: 1332 [2022-11-03 02:10:12,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 657 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 67.5s TimeCoverageRelationStatistics Valid=518, Invalid=2997, Unknown=25, NotChecked=0, Total=3540 [2022-11-03 02:10:12,651 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 778 mSDsluCounter, 3220 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 3350 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:12,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 3350 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 50 Unchecked, 0.0s Time] [2022-11-03 02:10:12,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2022-11-03 02:10:12,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 1316. [2022-11-03 02:10:12,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 1315 states have (on average 1.326996197718631) internal successors, (1745), 1315 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:12,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 1745 transitions. [2022-11-03 02:10:12,700 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 1745 transitions. Word has length 116 [2022-11-03 02:10:12,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:12,700 INFO L495 AbstractCegarLoop]: Abstraction has 1316 states and 1745 transitions. [2022-11-03 02:10:12,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 14.05) internal successors, (562), 40 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:12,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 1745 transitions. [2022-11-03 02:10:12,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:10:12,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:12,703 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:12,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-03 02:10:12,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:13,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:13,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:10:13,319 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:13,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:13,319 INFO L85 PathProgramCache]: Analyzing trace with hash 865722081, now seen corresponding path program 1 times [2022-11-03 02:10:13,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:13,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1507159342] [2022-11-03 02:10:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:13,321 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:13,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:13,327 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:13,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 02:10:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:14,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:10:14,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:15,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:25,679 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:25,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1507159342] [2022-11-03 02:10:25,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1507159342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:10:25,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1931887190] [2022-11-03 02:10:25,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:25,680 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:10:25,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:10:25,681 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:10:25,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-03 02:10:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:27,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:10:27,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:28,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:25,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:25,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1931887190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:25,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641133744] [2022-11-03 02:11:25,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:25,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:25,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:11:25,430 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:11:25,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-03 02:11:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:26,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:11:26,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:11:27,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:32,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:11:32,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641133744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:32,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:11:32,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 40 [2022-11-03 02:11:32,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011050872] [2022-11-03 02:11:32,156 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:11:32,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:11:32,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:32,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:11:32,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1328, Unknown=26, NotChecked=0, Total=1560 [2022-11-03 02:11:32,159 INFO L87 Difference]: Start difference. First operand 1316 states and 1745 transitions. Second operand has 40 states, 40 states have (on average 14.05) internal successors, (562), 40 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:35,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:35,075 INFO L93 Difference]: Finished difference Result 1985 states and 2641 transitions. [2022-11-03 02:11:35,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 02:11:35,076 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 14.05) internal successors, (562), 40 states have internal predecessors, (562), 0 states have call successors, (0), 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 116 [2022-11-03 02:11:35,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:35,082 INFO L225 Difference]: With dead ends: 1985 [2022-11-03 02:11:35,082 INFO L226 Difference]: Without dead ends: 1983 [2022-11-03 02:11:35,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 657 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 70.1s TimeCoverageRelationStatistics Valid=521, Invalid=2993, Unknown=26, NotChecked=0, Total=3540 [2022-11-03 02:11:35,084 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 815 mSDsluCounter, 3437 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 3567 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:35,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [815 Valid, 3567 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 82 Unchecked, 0.0s Time] [2022-11-03 02:11:35,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2022-11-03 02:11:35,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1952. [2022-11-03 02:11:35,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1951 states have (on average 1.3341875961045617) internal successors, (2603), 1951 states have internal predecessors, (2603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:35,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 2603 transitions. [2022-11-03 02:11:35,180 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 2603 transitions. Word has length 116 [2022-11-03 02:11:35,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:35,181 INFO L495 AbstractCegarLoop]: Abstraction has 1952 states and 2603 transitions. [2022-11-03 02:11:35,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 14.05) internal successors, (562), 40 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:35,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 2603 transitions. [2022-11-03 02:11:35,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:11:35,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:35,185 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:11:35,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:35,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:35,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:35,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:35,807 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:35,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:35,807 INFO L85 PathProgramCache]: Analyzing trace with hash -939716253, now seen corresponding path program 1 times [2022-11-03 02:11:35,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:35,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998723001] [2022-11-03 02:11:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:35,809 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:35,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:35,809 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:35,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 02:11:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:36,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 02:11:36,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:38,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:38,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:52,861 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:52,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998723001] [2022-11-03 02:11:52,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998723001] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:52,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [532998992] [2022-11-03 02:11:52,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:52,861 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:11:52,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:11:52,862 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:11:52,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-03 02:11:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:54,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 02:11:54,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:55,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:04,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:04,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [532998992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:04,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997350180] [2022-11-03 02:13:04,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:04,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:13:04,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:13:04,393 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:13:04,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-03 02:13:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:05,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:13:05,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:06,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:13:06,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:13:11,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997350180] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:11,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:13:11,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 43 [2022-11-03 02:13:11,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678708432] [2022-11-03 02:13:11,153 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:13:11,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-03 02:13:11,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:11,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-03 02:13:11,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1545, Unknown=36, NotChecked=0, Total=1806 [2022-11-03 02:13:11,155 INFO L87 Difference]: Start difference. First operand 1952 states and 2603 transitions. Second operand has 43 states, 43 states have (on average 13.069767441860465) internal successors, (562), 43 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:14,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:14,450 INFO L93 Difference]: Finished difference Result 3629 states and 4835 transitions. [2022-11-03 02:13:14,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 02:13:14,451 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 13.069767441860465) internal successors, (562), 43 states have internal predecessors, (562), 0 states have call successors, (0), 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 116 [2022-11-03 02:13:14,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:14,461 INFO L225 Difference]: With dead ends: 3629 [2022-11-03 02:13:14,461 INFO L226 Difference]: Without dead ends: 3627 [2022-11-03 02:13:14,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 656 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 87.1s TimeCoverageRelationStatistics Valid=561, Invalid=3435, Unknown=36, NotChecked=0, Total=4032 [2022-11-03 02:13:14,463 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 807 mSDsluCounter, 3511 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 3641 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:14,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 3641 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 56 Unchecked, 0.0s Time] [2022-11-03 02:13:14,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3627 states. [2022-11-03 02:13:14,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3627 to 3572. [2022-11-03 02:13:14,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3572 states, 3571 states have (on average 1.3354802576309157) internal successors, (4769), 3571 states have internal predecessors, (4769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:14,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3572 states to 3572 states and 4769 transitions. [2022-11-03 02:13:14,663 INFO L78 Accepts]: Start accepts. Automaton has 3572 states and 4769 transitions. Word has length 116 [2022-11-03 02:13:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:14,663 INFO L495 AbstractCegarLoop]: Abstraction has 3572 states and 4769 transitions. [2022-11-03 02:13:14,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 13.069767441860465) internal successors, (562), 43 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:14,664 INFO L276 IsEmpty]: Start isEmpty. Operand 3572 states and 4769 transitions. [2022-11-03 02:13:14,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:13:14,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:14,669 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:13:14,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:14,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-11-03 02:13:15,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-11-03 02:13:15,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:13:15,283 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:15,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:15,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1203291745, now seen corresponding path program 1 times [2022-11-03 02:13:15,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:15,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637157601] [2022-11-03 02:13:15,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:15,285 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:15,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:15,286 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:15,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 02:13:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:16,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:13:16,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:16,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:13:16,318 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:16,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637157601] [2022-11-03 02:13:16,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637157601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:16,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:16,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:13:16,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349544318] [2022-11-03 02:13:16,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:16,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:13:16,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:16,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:13:16,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:13:16,320 INFO L87 Difference]: Start difference. First operand 3572 states and 4769 transitions. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:16,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:16,709 INFO L93 Difference]: Finished difference Result 4805 states and 6393 transitions. [2022-11-03 02:13:16,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:13:16,710 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-03 02:13:16,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:16,716 INFO L225 Difference]: With dead ends: 4805 [2022-11-03 02:13:16,716 INFO L226 Difference]: Without dead ends: 4587 [2022-11-03 02:13:16,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:13:16,718 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 102 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:16,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 1083 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2022-11-03 02:13:16,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4587 states. [2022-11-03 02:13:16,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4587 to 3572. [2022-11-03 02:13:16,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3572 states, 3571 states have (on average 1.333800056006721) internal successors, (4763), 3571 states have internal predecessors, (4763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:16,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3572 states to 3572 states and 4763 transitions. [2022-11-03 02:13:16,907 INFO L78 Accepts]: Start accepts. Automaton has 3572 states and 4763 transitions. Word has length 116 [2022-11-03 02:13:16,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:16,907 INFO L495 AbstractCegarLoop]: Abstraction has 3572 states and 4763 transitions. [2022-11-03 02:13:16,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:16,908 INFO L276 IsEmpty]: Start isEmpty. Operand 3572 states and 4763 transitions. [2022-11-03 02:13:16,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:13:16,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:16,913 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:13:16,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-03 02:13:17,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:13:17,126 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:17,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:17,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1343840355, now seen corresponding path program 1 times [2022-11-03 02:13:17,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:17,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272249221] [2022-11-03 02:13:17,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:17,128 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:17,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:17,128 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:17,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 02:13:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:17,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 02:13:17,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:19,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:36,201 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:36,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272249221] [2022-11-03 02:13:36,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272249221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:36,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [991638860] [2022-11-03 02:13:36,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:36,201 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:13:36,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:13:36,202 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:13:36,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-03 02:13:37,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:37,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 02:13:37,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:39,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:39,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:05,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [991638860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:05,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702349039] [2022-11-03 02:15:05,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:05,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:05,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:05,106 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:05,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-03 02:15:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:05,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:15:05,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:15:07,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:15:11,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702349039] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:11,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:15:11,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 43 [2022-11-03 02:15:11,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752127104] [2022-11-03 02:15:11,824 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:15:11,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-03 02:15:11,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:11,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-03 02:15:11,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1536, Unknown=46, NotChecked=0, Total=1806 [2022-11-03 02:15:11,827 INFO L87 Difference]: Start difference. First operand 3572 states and 4763 transitions. Second operand has 43 states, 43 states have (on average 13.069767441860465) internal successors, (562), 43 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:14,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:14,903 INFO L93 Difference]: Finished difference Result 4085 states and 5442 transitions. [2022-11-03 02:15:14,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 02:15:14,903 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 13.069767441860465) internal successors, (562), 43 states have internal predecessors, (562), 0 states have call successors, (0), 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 116 [2022-11-03 02:15:14,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:14,913 INFO L225 Difference]: With dead ends: 4085 [2022-11-03 02:15:14,913 INFO L226 Difference]: Without dead ends: 4083 [2022-11-03 02:15:14,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 656 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 106.6s TimeCoverageRelationStatistics Valid=560, Invalid=3426, Unknown=46, NotChecked=0, Total=4032 [2022-11-03 02:15:14,916 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 706 mSDsluCounter, 4160 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 4291 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:14,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 4291 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 55 Unchecked, 0.0s Time] [2022-11-03 02:15:14,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4083 states. [2022-11-03 02:15:15,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4083 to 4040. [2022-11-03 02:15:15,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4040 states, 4039 states have (on average 1.3344887348353554) internal successors, (5390), 4039 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:15,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4040 states to 4040 states and 5390 transitions. [2022-11-03 02:15:15,110 INFO L78 Accepts]: Start accepts. Automaton has 4040 states and 5390 transitions. Word has length 116 [2022-11-03 02:15:15,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:15,111 INFO L495 AbstractCegarLoop]: Abstraction has 4040 states and 5390 transitions. [2022-11-03 02:15:15,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 13.069767441860465) internal successors, (562), 43 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:15,111 INFO L276 IsEmpty]: Start isEmpty. Operand 4040 states and 5390 transitions. [2022-11-03 02:15:15,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:15:15,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:15,117 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:15,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:15,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:15,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:15,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:15,730 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:15,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:15,731 INFO L85 PathProgramCache]: Analyzing trace with hash 990751973, now seen corresponding path program 1 times [2022-11-03 02:15:15,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:15,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124048195] [2022-11-03 02:15:15,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:15,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:15,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:15,733 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:15,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 02:15:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:16,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-03 02:15:16,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:17,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:30,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:30,486 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:30,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124048195] [2022-11-03 02:15:30,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124048195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:30,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [660178339] [2022-11-03 02:15:30,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:30,486 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:30,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:15:30,491 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:15:30,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-03 02:15:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:32,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-03 02:15:32,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:33,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:33,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:16:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:55,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [660178339] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:16:55,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202229994] [2022-11-03 02:16:55,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:55,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:16:55,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:16:55,540 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:16:55,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-03 02:16:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:56,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:16:56,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:16:58,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:02,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:17:02,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202229994] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:02,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:17:02,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 43 [2022-11-03 02:17:02,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380307306] [2022-11-03 02:17:02,925 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:17:02,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-03 02:17:02,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:02,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-03 02:17:02,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1541, Unknown=40, NotChecked=0, Total=1806 [2022-11-03 02:17:02,928 INFO L87 Difference]: Start difference. First operand 4040 states and 5390 transitions. Second operand has 43 states, 43 states have (on average 13.069767441860465) internal successors, (562), 43 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:07,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:07,003 INFO L93 Difference]: Finished difference Result 7537 states and 10036 transitions. [2022-11-03 02:17:07,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 02:17:07,004 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 13.069767441860465) internal successors, (562), 43 states have internal predecessors, (562), 0 states have call successors, (0), 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 116 [2022-11-03 02:17:07,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:07,023 INFO L225 Difference]: With dead ends: 7537 [2022-11-03 02:17:07,023 INFO L226 Difference]: Without dead ends: 7535 [2022-11-03 02:17:07,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 655 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 99.6s TimeCoverageRelationStatistics Valid=561, Invalid=3431, Unknown=40, NotChecked=0, Total=4032 [2022-11-03 02:17:07,026 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 1282 mSDsluCounter, 3296 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1282 SdHoareTripleChecker+Valid, 3427 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:07,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1282 Valid, 3427 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 94 Unchecked, 0.0s Time] [2022-11-03 02:17:07,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7535 states. [2022-11-03 02:17:07,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7535 to 7456. [2022-11-03 02:17:07,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7456 states, 7455 states have (on average 1.3336016096579477) internal successors, (9942), 7455 states have internal predecessors, (9942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:07,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7456 states to 7456 states and 9942 transitions. [2022-11-03 02:17:07,331 INFO L78 Accepts]: Start accepts. Automaton has 7456 states and 9942 transitions. Word has length 116 [2022-11-03 02:17:07,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:07,332 INFO L495 AbstractCegarLoop]: Abstraction has 7456 states and 9942 transitions. [2022-11-03 02:17:07,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 13.069767441860465) internal successors, (562), 43 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:07,332 INFO L276 IsEmpty]: Start isEmpty. Operand 7456 states and 9942 transitions. [2022-11-03 02:17:07,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:17:07,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:07,340 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:17:07,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:07,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:07,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:07,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:07,961 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:07,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:07,961 INFO L85 PathProgramCache]: Analyzing trace with hash -814686361, now seen corresponding path program 1 times [2022-11-03 02:17:07,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:07,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887192560] [2022-11-03 02:17:07,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:07,962 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:07,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:07,963 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:07,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 02:17:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:08,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 02:17:08,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:10,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:10,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:33,098 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:33,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887192560] [2022-11-03 02:17:33,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887192560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:33,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1598853235] [2022-11-03 02:17:33,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:33,099 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:17:33,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:17:33,100 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:17:33,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-03 02:17:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:34,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 02:17:34,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:35,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:35,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:09,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:09,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1598853235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:09,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052198513] [2022-11-03 02:19:09,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:09,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:09,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:09,650 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:09,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-03 02:19:10,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:10,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:19:10,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:12,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:19:12,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:17,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:19:17,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052198513] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:17,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:19:17,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 43 [2022-11-03 02:19:17,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687181423] [2022-11-03 02:19:17,619 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:17,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-03 02:19:17,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:19:17,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-03 02:19:17,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1540, Unknown=55, NotChecked=0, Total=1806 [2022-11-03 02:19:17,624 INFO L87 Difference]: Start difference. First operand 7456 states and 9942 transitions. Second operand has 43 states, 43 states have (on average 13.069767441860465) internal successors, (562), 43 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:22,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:22,632 INFO L93 Difference]: Finished difference Result 8959 states and 11949 transitions. [2022-11-03 02:19:22,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-03 02:19:22,638 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 13.069767441860465) internal successors, (562), 43 states have internal predecessors, (562), 0 states have call successors, (0), 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 116 [2022-11-03 02:19:22,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:22,654 INFO L225 Difference]: With dead ends: 8959 [2022-11-03 02:19:22,655 INFO L226 Difference]: Without dead ends: 8957 [2022-11-03 02:19:22,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 722 GetRequests, 657 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 122.3s TimeCoverageRelationStatistics Valid=544, Invalid=3691, Unknown=55, NotChecked=0, Total=4290 [2022-11-03 02:19:22,659 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 1701 mSDsluCounter, 4034 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1701 SdHoareTripleChecker+Valid, 4165 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:22,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1701 Valid, 4165 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 179 Unchecked, 0.3s Time] [2022-11-03 02:19:22,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8957 states. [2022-11-03 02:19:22,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8957 to 8668. [2022-11-03 02:19:22,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8668 states, 8667 states have (on average 1.3357563170647282) internal successors, (11577), 8667 states have internal predecessors, (11577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:22,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8668 states to 8668 states and 11577 transitions. [2022-11-03 02:19:22,995 INFO L78 Accepts]: Start accepts. Automaton has 8668 states and 11577 transitions. Word has length 116 [2022-11-03 02:19:22,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:22,995 INFO L495 AbstractCegarLoop]: Abstraction has 8668 states and 11577 transitions. [2022-11-03 02:19:22,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 13.069767441860465) internal successors, (562), 43 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:22,995 INFO L276 IsEmpty]: Start isEmpty. Operand 8668 states and 11577 transitions. [2022-11-03 02:19:23,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:19:23,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:23,002 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:19:23,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:23,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:23,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:23,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:19:23,603 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:23,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:23,603 INFO L85 PathProgramCache]: Analyzing trace with hash 936766565, now seen corresponding path program 1 times [2022-11-03 02:19:23,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:19:23,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473949637] [2022-11-03 02:19:23,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:23,604 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:19:23,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:19:23,605 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:19:23,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 02:19:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:24,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:19:24,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:25,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:26,590 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:19:26,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473949637] [2022-11-03 02:19:26,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473949637] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:26,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1844234138] [2022-11-03 02:19:26,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:26,594 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:19:26,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:19:26,595 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:19:26,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-03 02:19:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:28,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 02:19:28,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:30,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:46,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:46,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1844234138] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:46,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136729552] [2022-11-03 02:19:46,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:46,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:46,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:46,755 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:46,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-03 02:19:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:47,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:19:47,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:48,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:49,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136729552] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:49,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:19:49,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11, 11, 9, 9] total 34 [2022-11-03 02:19:49,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423514003] [2022-11-03 02:19:49,241 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:49,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 02:19:49,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:19:49,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 02:19:49,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=972, Unknown=4, NotChecked=0, Total=1122 [2022-11-03 02:19:49,243 INFO L87 Difference]: Start difference. First operand 8668 states and 11577 transitions. Second operand has 34 states, 34 states have (on average 13.441176470588236) internal successors, (457), 34 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:52,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:52,845 INFO L93 Difference]: Finished difference Result 11055 states and 14808 transitions. [2022-11-03 02:19:52,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-03 02:19:52,845 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 13.441176470588236) internal successors, (457), 34 states have internal predecessors, (457), 0 states have call successors, (0), 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 116 [2022-11-03 02:19:52,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:52,863 INFO L225 Difference]: With dead ends: 11055 [2022-11-03 02:19:52,863 INFO L226 Difference]: Without dead ends: 10942 [2022-11-03 02:19:52,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 671 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=408, Invalid=2558, Unknown=4, NotChecked=0, Total=2970 [2022-11-03 02:19:52,867 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 1268 mSDsluCounter, 4856 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 5153 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:52,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1268 Valid, 5153 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 268 Unchecked, 0.2s Time] [2022-11-03 02:19:52,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10942 states. [2022-11-03 02:19:53,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10942 to 9734. [2022-11-03 02:19:53,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9734 states, 9733 states have (on average 1.3413130586663926) internal successors, (13055), 9733 states have internal predecessors, (13055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:53,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9734 states to 9734 states and 13055 transitions. [2022-11-03 02:19:53,457 INFO L78 Accepts]: Start accepts. Automaton has 9734 states and 13055 transitions. Word has length 116 [2022-11-03 02:19:53,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:53,457 INFO L495 AbstractCegarLoop]: Abstraction has 9734 states and 13055 transitions. [2022-11-03 02:19:53,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 13.441176470588236) internal successors, (457), 34 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:53,458 INFO L276 IsEmpty]: Start isEmpty. Operand 9734 states and 13055 transitions. [2022-11-03 02:19:53,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:19:53,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:53,469 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:19:53,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:53,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:53,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-11-03 02:19:54,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:54,095 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:54,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:54,096 INFO L85 PathProgramCache]: Analyzing trace with hash -713944347, now seen corresponding path program 1 times [2022-11-03 02:19:54,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:19:54,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82533375] [2022-11-03 02:19:54,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:54,097 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:19:54,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:19:54,098 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:19:54,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-03 02:19:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:55,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-03 02:19:55,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:57,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:20:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:20:26,504 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:20:26,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82533375] [2022-11-03 02:20:26,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82533375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:20:26,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [915971216] [2022-11-03 02:20:26,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:26,505 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:20:26,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:20:26,506 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:20:26,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7b0268-0cba-491c-88fe-41371ad18540/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-11-03 02:20:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:28,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-03 02:20:28,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:20:29,871 INFO L328 TraceCheckSpWp]: Computing backward predicates...