./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0df7d1e-909b-4238-938c-d54d23f00fc9/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0df7d1e-909b-4238-938c-d54d23f00fc9/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0df7d1e-909b-4238-938c-d54d23f00fc9/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0df7d1e-909b-4238-938c-d54d23f00fc9/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0df7d1e-909b-4238-938c-d54d23f00fc9/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0df7d1e-909b-4238-938c-d54d23f00fc9/bin/uautomizer-TMbwUNV5ro --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 --- 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-8393723 [2022-11-18 18:43:52,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:43:52,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:43:52,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:43:52,109 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:43:52,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:43:52,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:43:52,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:43:52,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:43:52,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:43:52,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:43:52,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:43:52,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:43:52,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:43:52,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:43:52,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:43:52,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:43:52,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:43:52,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:43:52,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:43:52,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:43:52,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:43:52,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:43:52,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:43:52,137 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:43:52,138 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:43:52,138 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:43:52,139 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:43:52,140 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:43:52,141 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:43:52,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:43:52,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:43:52,143 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:43:52,144 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:43:52,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:43:52,145 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:43:52,146 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:43:52,147 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:43:52,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:43:52,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:43:52,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:43:52,150 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0df7d1e-909b-4238-938c-d54d23f00fc9/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:43:52,171 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:43:52,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:43:52,172 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:43:52,172 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:43:52,173 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:43:52,173 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:43:52,174 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:43:52,174 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:43:52,174 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:43:52,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:43:52,175 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:43:52,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:43:52,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:43:52,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:43:52,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:43:52,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:43:52,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:43:52,177 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:43:52,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:43:52,177 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:43:52,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:43:52,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:43:52,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:43:52,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:43:52,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:43:52,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:43:52,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:43:52,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:43:52,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:43:52,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:43:52,180 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:43:52,180 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:43:52,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:43:52,181 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_e0df7d1e-909b-4238-938c-d54d23f00fc9/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0df7d1e-909b-4238-938c-d54d23f00fc9/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 [2022-11-18 18:43:52,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:43:52,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:43:52,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:43:52,432 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:43:52,433 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:43:52,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0df7d1e-909b-4238-938c-d54d23f00fc9/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-11-18 18:43:52,496 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0df7d1e-909b-4238-938c-d54d23f00fc9/bin/uautomizer-TMbwUNV5ro/data/c3ce49fb8/dcedb9a16fca465fab89e98a02d5a2e2/FLAG9cdc9ec14 [2022-11-18 18:43:53,259 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:43:53,260 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0df7d1e-909b-4238-938c-d54d23f00fc9/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-11-18 18:43:53,311 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0df7d1e-909b-4238-938c-d54d23f00fc9/bin/uautomizer-TMbwUNV5ro/data/c3ce49fb8/dcedb9a16fca465fab89e98a02d5a2e2/FLAG9cdc9ec14 [2022-11-18 18:43:53,336 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0df7d1e-909b-4238-938c-d54d23f00fc9/bin/uautomizer-TMbwUNV5ro/data/c3ce49fb8/dcedb9a16fca465fab89e98a02d5a2e2 [2022-11-18 18:43:53,339 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:43:53,342 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:43:53,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:43:53,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:43:53,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:43:53,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:43:53" (1/1) ... [2022-11-18 18:43:53,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@635505eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:53, skipping insertion in model container [2022-11-18 18:43:53,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:43:53" (1/1) ... [2022-11-18 18:43:53,359 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:43:53,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:43:54,328 WARN L234 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_e0df7d1e-909b-4238-938c-d54d23f00fc9/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-11-18 18:43:54,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:43:54,939 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:43:55,028 WARN L234 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_e0df7d1e-909b-4238-938c-d54d23f00fc9/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-11-18 18:43:55,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:43:55,451 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:43:55,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:55 WrapperNode [2022-11-18 18:43:55,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:43:55,454 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:43:55,454 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:43:55,454 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:43:55,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:55" (1/1) ... [2022-11-18 18:43:55,558 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:55" (1/1) ... [2022-11-18 18:43:55,694 INFO L138 Inliner]: procedures = 128, calls = 2895, calls flagged for inlining = 37, calls inlined = 26, statements flattened = 3094 [2022-11-18 18:43:55,695 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:43:55,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:43:55,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:43:55,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:43:55,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:55" (1/1) ... [2022-11-18 18:43:55,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:55" (1/1) ... [2022-11-18 18:43:55,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:55" (1/1) ... [2022-11-18 18:43:55,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:55" (1/1) ... [2022-11-18 18:43:55,842 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:55" (1/1) ... [2022-11-18 18:43:55,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:55" (1/1) ... [2022-11-18 18:43:55,922 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:55" (1/1) ... [2022-11-18 18:43:55,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:55" (1/1) ... [2022-11-18 18:43:55,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:43:55,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:43:55,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:43:55,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:43:55,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:55" (1/1) ... [2022-11-18 18:43:55,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:43:55,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0df7d1e-909b-4238-938c-d54d23f00fc9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:56,001 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0df7d1e-909b-4238-938c-d54d23f00fc9/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:43:56,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0df7d1e-909b-4238-938c-d54d23f00fc9/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:43:56,046 INFO L130 BoogieDeclarations]: Found specification of procedure IoGetConfigurationInformation [2022-11-18 18:43:56,047 INFO L138 BoogieDeclarations]: Found implementation of procedure IoGetConfigurationInformation [2022-11-18 18:43:56,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-18 18:43:56,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-18 18:43:56,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-18 18:43:56,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:43:56,048 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-11-18 18:43:56,048 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-11-18 18:43:56,049 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-11-18 18:43:56,049 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-11-18 18:43:56,049 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-11-18 18:43:56,050 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-11-18 18:43:56,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:43:56,050 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-11-18 18:43:56,050 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-11-18 18:43:56,050 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-11-18 18:43:56,050 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-11-18 18:43:56,050 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedExchange [2022-11-18 18:43:56,051 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedExchange [2022-11-18 18:43:56,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-18 18:43:56,051 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-18 18:43:56,051 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-11-18 18:43:56,051 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-11-18 18:43:56,051 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-11-18 18:43:56,052 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-11-18 18:43:56,052 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2022-11-18 18:43:56,052 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2022-11-18 18:43:56,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 18:43:56,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:43:56,052 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-11-18 18:43:56,052 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-11-18 18:43:56,053 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertTailList [2022-11-18 18:43:56,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertTailList [2022-11-18 18:43:56,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:43:56,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-18 18:43:56,053 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-11-18 18:43:56,053 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-11-18 18:43:56,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-18 18:43:56,054 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-11-18 18:43:56,054 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-11-18 18:43:56,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:43:56,055 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-11-18 18:43:56,055 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-11-18 18:43:56,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2022-11-18 18:43:56,055 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2022-11-18 18:43:56,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:43:56,055 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2022-11-18 18:43:56,056 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2022-11-18 18:43:56,056 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2022-11-18 18:43:56,056 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2022-11-18 18:43:56,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-18 18:43:56,056 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2022-11-18 18:43:56,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2022-11-18 18:43:56,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:43:56,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:43:56,578 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:43:56,581 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:43:56,635 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 18:43:56,649 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-11-18 18:43:56,649 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-11-18 18:43:56,652 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 18:43:56,793 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-11-18 18:43:56,793 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-11-18 18:43:56,818 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 18:43:56,834 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-11-18 18:43:56,834 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-11-18 18:43:56,964 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 18:43:56,989 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-11-18 18:43:56,989 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-11-18 18:43:56,990 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 18:43:56,991 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 18:43:56,992 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 18:43:57,172 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2022-11-18 18:43:57,173 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-11-18 18:43:57,173 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-11-18 18:43:57,173 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2022-11-18 18:43:57,173 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-11-18 18:43:57,173 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-11-18 18:43:57,176 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 18:43:57,194 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 18:43:57,195 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 18:43:57,847 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2022-11-18 18:43:57,847 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2022-11-18 18:43:57,848 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2022-11-18 18:43:57,848 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2022-11-18 18:43:57,849 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##124: assume !false; [2022-11-18 18:43:57,849 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##123: assume false; [2022-11-18 18:43:57,886 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 18:43:57,949 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-11-18 18:43:57,950 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-11-18 18:43:57,963 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 18:43:57,968 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 18:43:57,971 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 18:43:57,974 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 18:43:57,975 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 18:43:57,981 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 18:43:57,982 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 18:43:57,983 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 18:44:02,180 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !false; [2022-11-18 18:44:02,181 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume false; [2022-11-18 18:44:02,181 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##76: assume false; [2022-11-18 18:44:02,181 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##177: assume !false; [2022-11-18 18:44:02,181 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##176: assume false; [2022-11-18 18:44:02,181 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##77: assume !false; [2022-11-18 18:44:02,181 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##48: assume !false; [2022-11-18 18:44:02,181 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume false; [2022-11-18 18:44:02,181 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume !false; [2022-11-18 18:44:02,182 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume false; [2022-11-18 18:44:02,182 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##162: assume false; [2022-11-18 18:44:02,182 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume !false; [2022-11-18 18:44:02,182 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##210: assume false; [2022-11-18 18:44:02,182 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##211: assume !false; [2022-11-18 18:44:02,182 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##108: assume !false; [2022-11-18 18:44:02,182 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##107: assume false; [2022-11-18 18:44:02,214 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:44:02,232 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:44:02,232 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-18 18:44:02,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:44:02 BoogieIcfgContainer [2022-11-18 18:44:02,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:44:02,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:44:02,238 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:44:02,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:44:02,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:43:53" (1/3) ... [2022-11-18 18:44:02,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eedaee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:44:02, skipping insertion in model container [2022-11-18 18:44:02,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:55" (2/3) ... [2022-11-18 18:44:02,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eedaee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:44:02, skipping insertion in model container [2022-11-18 18:44:02,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:44:02" (3/3) ... [2022-11-18 18:44:02,253 INFO L112 eAbstractionObserver]: Analyzing ICFG floppy.i.cil-3.c [2022-11-18 18:44:02,274 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:44:02,275 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 18:44:02,357 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:44:02,364 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=PETRI_NET, 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;@cb621e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:44:02,364 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 18:44:02,380 INFO L276 IsEmpty]: Start isEmpty. Operand has 580 states, 463 states have (on average 1.4989200863930885) internal successors, (694), 496 states have internal predecessors, (694), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2022-11-18 18:44:02,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 18:44:02,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:44:02,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:02,394 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:44:02,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:02,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1811520219, now seen corresponding path program 1 times [2022-11-18 18:44:02,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:02,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390754976] [2022-11-18 18:44:02,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:02,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:03,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:44:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:03,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:44:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:03,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:03,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390754976] [2022-11-18 18:44:03,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390754976] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:44:03,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:44:03,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:44:03,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789045359] [2022-11-18 18:44:03,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:44:03,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:44:03,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:03,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:44:03,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:44:03,319 INFO L87 Difference]: Start difference. First operand has 580 states, 463 states have (on average 1.4989200863930885) internal successors, (694), 496 states have internal predecessors, (694), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 18:44:07,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:44:08,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:44:08,349 INFO L93 Difference]: Finished difference Result 1174 states and 1848 transitions. [2022-11-18 18:44:08,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:44:08,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-11-18 18:44:08,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:44:08,368 INFO L225 Difference]: With dead ends: 1174 [2022-11-18 18:44:08,368 INFO L226 Difference]: Without dead ends: 657 [2022-11-18 18:44:08,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:44:08,378 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 419 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 219 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 2054 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:44:08,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 2054 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 887 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-11-18 18:44:08,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-11-18 18:44:08,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 579. [2022-11-18 18:44:08,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 462 states have (on average 1.4567099567099566) internal successors, (673), 493 states have internal predecessors, (673), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-11-18 18:44:08,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 840 transitions. [2022-11-18 18:44:08,503 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 840 transitions. Word has length 26 [2022-11-18 18:44:08,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:44:08,504 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 840 transitions. [2022-11-18 18:44:08,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 18:44:08,505 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 840 transitions. [2022-11-18 18:44:08,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-18 18:44:08,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:44:08,507 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:08,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:44:08,507 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:44:08,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:08,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1723209200, now seen corresponding path program 1 times [2022-11-18 18:44:08,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:08,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103697948] [2022-11-18 18:44:08,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:08,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:09,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:44:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:09,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:44:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:09,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:09,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103697948] [2022-11-18 18:44:09,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103697948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:44:09,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:44:09,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:44:09,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230546583] [2022-11-18 18:44:09,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:44:09,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:44:09,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:09,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:44:09,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:44:09,129 INFO L87 Difference]: Start difference. First operand 579 states and 840 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 18:44:14,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:44:15,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:44:15,032 INFO L93 Difference]: Finished difference Result 1217 states and 1784 transitions. [2022-11-18 18:44:15,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:44:15,035 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-11-18 18:44:15,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:44:15,040 INFO L225 Difference]: With dead ends: 1217 [2022-11-18 18:44:15,040 INFO L226 Difference]: Without dead ends: 657 [2022-11-18 18:44:15,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:44:15,047 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 381 mSDsluCounter, 2004 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 213 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 2663 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:44:15,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 2663 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1088 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2022-11-18 18:44:15,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-11-18 18:44:15,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 579. [2022-11-18 18:44:15,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 462 states have (on average 1.4545454545454546) internal successors, (672), 493 states have internal predecessors, (672), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-11-18 18:44:15,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 839 transitions. [2022-11-18 18:44:15,113 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 839 transitions. Word has length 29 [2022-11-18 18:44:15,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:44:15,113 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 839 transitions. [2022-11-18 18:44:15,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 18:44:15,114 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 839 transitions. [2022-11-18 18:44:15,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-18 18:44:15,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:44:15,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:15,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:44:15,116 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:44:15,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:15,117 INFO L85 PathProgramCache]: Analyzing trace with hash 51194362, now seen corresponding path program 1 times [2022-11-18 18:44:15,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:15,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365380722] [2022-11-18 18:44:15,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:15,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:15,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:44:15,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:15,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:44:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:15,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:15,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365380722] [2022-11-18 18:44:15,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365380722] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:44:15,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:44:15,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:44:15,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566025948] [2022-11-18 18:44:15,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:44:15,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:44:15,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:15,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:44:15,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:44:15,748 INFO L87 Difference]: Start difference. First operand 579 states and 839 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 18:44:20,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:44:22,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:44:22,223 INFO L93 Difference]: Finished difference Result 1542 states and 2294 transitions. [2022-11-18 18:44:22,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:44:22,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2022-11-18 18:44:22,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:44:22,233 INFO L225 Difference]: With dead ends: 1542 [2022-11-18 18:44:22,233 INFO L226 Difference]: Without dead ends: 1127 [2022-11-18 18:44:22,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:44:22,237 INFO L413 NwaCegarLoop]: 820 mSDtfsCounter, 1376 mSDsluCounter, 1485 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 380 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1413 SdHoareTripleChecker+Valid, 2305 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:44:22,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1413 Valid, 2305 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 1152 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2022-11-18 18:44:22,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-11-18 18:44:22,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1008. [2022-11-18 18:44:22,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 832 states have (on average 1.4399038461538463) internal successors, (1198), 859 states have internal predecessors, (1198), 132 states have call successors, (132), 40 states have call predecessors, (132), 43 states have return successors, (155), 116 states have call predecessors, (155), 117 states have call successors, (155) [2022-11-18 18:44:22,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1485 transitions. [2022-11-18 18:44:22,311 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1485 transitions. Word has length 33 [2022-11-18 18:44:22,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:44:22,311 INFO L495 AbstractCegarLoop]: Abstraction has 1008 states and 1485 transitions. [2022-11-18 18:44:22,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 18:44:22,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1485 transitions. [2022-11-18 18:44:22,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 18:44:22,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:44:22,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:22,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 18:44:22,324 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:44:22,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:22,325 INFO L85 PathProgramCache]: Analyzing trace with hash -778149095, now seen corresponding path program 1 times [2022-11-18 18:44:22,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:22,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458774221] [2022-11-18 18:44:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:22,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:22,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:44:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:22,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:44:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:22,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-18 18:44:22,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:22,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:22,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458774221] [2022-11-18 18:44:22,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458774221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:44:22,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:44:22,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:44:23,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664286438] [2022-11-18 18:44:23,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:44:23,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:44:23,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:23,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:44:23,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:44:23,008 INFO L87 Difference]: Start difference. First operand 1008 states and 1485 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 18:44:27,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:44:29,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:44:29,183 INFO L93 Difference]: Finished difference Result 1879 states and 2849 transitions. [2022-11-18 18:44:29,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:44:29,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-11-18 18:44:29,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:44:29,195 INFO L225 Difference]: With dead ends: 1879 [2022-11-18 18:44:29,196 INFO L226 Difference]: Without dead ends: 1860 [2022-11-18 18:44:29,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:44:29,200 INFO L413 NwaCegarLoop]: 692 mSDtfsCounter, 1502 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 364 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:44:29,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1572 Valid, 1947 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 926 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2022-11-18 18:44:29,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2022-11-18 18:44:29,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1624. [2022-11-18 18:44:29,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1348 states have (on average 1.4614243323442135) internal successors, (1970), 1393 states have internal predecessors, (1970), 203 states have call successors, (203), 65 states have call predecessors, (203), 72 states have return successors, (264), 178 states have call predecessors, (264), 188 states have call successors, (264) [2022-11-18 18:44:29,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2437 transitions. [2022-11-18 18:44:29,312 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2437 transitions. Word has length 45 [2022-11-18 18:44:29,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:44:29,312 INFO L495 AbstractCegarLoop]: Abstraction has 1624 states and 2437 transitions. [2022-11-18 18:44:29,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 18:44:29,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2437 transitions. [2022-11-18 18:44:29,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-18 18:44:29,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:44:29,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:29,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 18:44:29,316 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:44:29,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:29,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1291674765, now seen corresponding path program 1 times [2022-11-18 18:44:29,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:29,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998642858] [2022-11-18 18:44:29,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:29,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:29,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:44:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:29,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:44:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:29,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:29,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998642858] [2022-11-18 18:44:29,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998642858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:44:29,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:44:29,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:44:29,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524647683] [2022-11-18 18:44:29,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:44:29,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:44:29,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:29,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:44:29,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:44:29,650 INFO L87 Difference]: Start difference. First operand 1624 states and 2437 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 18:44:34,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:44:34,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:44:34,954 INFO L93 Difference]: Finished difference Result 1856 states and 2829 transitions. [2022-11-18 18:44:34,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:44:34,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2022-11-18 18:44:34,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:44:34,967 INFO L225 Difference]: With dead ends: 1856 [2022-11-18 18:44:34,967 INFO L226 Difference]: Without dead ends: 1852 [2022-11-18 18:44:34,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:44:34,969 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 492 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 221 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:44:34,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 1939 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 871 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2022-11-18 18:44:34,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2022-11-18 18:44:35,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1657. [2022-11-18 18:44:35,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1379 states have (on average 1.4612037708484409) internal successors, (2015), 1421 states have internal predecessors, (2015), 204 states have call successors, (204), 67 states have call predecessors, (204), 73 states have return successors, (265), 179 states have call predecessors, (265), 189 states have call successors, (265) [2022-11-18 18:44:35,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2484 transitions. [2022-11-18 18:44:35,064 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2484 transitions. Word has length 43 [2022-11-18 18:44:35,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:44:35,065 INFO L495 AbstractCegarLoop]: Abstraction has 1657 states and 2484 transitions. [2022-11-18 18:44:35,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 18:44:35,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2484 transitions. [2022-11-18 18:44:35,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 18:44:35,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:44:35,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:35,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 18:44:35,068 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:44:35,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:35,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1850160334, now seen corresponding path program 1 times [2022-11-18 18:44:35,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:35,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608344947] [2022-11-18 18:44:35,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:35,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:35,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:44:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:35,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:44:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:35,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:35,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:35,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608344947] [2022-11-18 18:44:35,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608344947] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:44:35,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:44:35,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:44:35,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655548518] [2022-11-18 18:44:35,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:44:35,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:44:35,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:35,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:44:35,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:44:35,379 INFO L87 Difference]: Start difference. First operand 1657 states and 2484 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 18:44:39,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:44:42,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:44:42,278 INFO L93 Difference]: Finished difference Result 3293 states and 5099 transitions. [2022-11-18 18:44:42,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:44:42,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2022-11-18 18:44:42,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:44:42,298 INFO L225 Difference]: With dead ends: 3293 [2022-11-18 18:44:42,298 INFO L226 Difference]: Without dead ends: 3290 [2022-11-18 18:44:42,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:44:42,301 INFO L413 NwaCegarLoop]: 1008 mSDtfsCounter, 958 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 277 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 2787 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:44:42,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [987 Valid, 2787 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1355 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2022-11-18 18:44:42,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2022-11-18 18:44:42,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 2657. [2022-11-18 18:44:42,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2246 states have (on average 1.4746215494211932) internal successors, (3312), 2298 states have internal predecessors, (3312), 292 states have call successors, (292), 107 states have call predecessors, (292), 118 states have return successors, (418), 262 states have call predecessors, (418), 277 states have call successors, (418) [2022-11-18 18:44:42,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 4022 transitions. [2022-11-18 18:44:42,460 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 4022 transitions. Word has length 45 [2022-11-18 18:44:42,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:44:42,460 INFO L495 AbstractCegarLoop]: Abstraction has 2657 states and 4022 transitions. [2022-11-18 18:44:42,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 18:44:42,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 4022 transitions. [2022-11-18 18:44:42,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 18:44:42,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:44:42,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:42,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 18:44:42,463 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:44:42,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:42,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1615003555, now seen corresponding path program 1 times [2022-11-18 18:44:42,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:42,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232434669] [2022-11-18 18:44:42,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:42,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:42,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:44:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:42,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:44:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:42,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 18:44:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:42,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:44:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:42,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:42,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232434669] [2022-11-18 18:44:42,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232434669] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:44:42,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:44:42,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:44:42,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935590726] [2022-11-18 18:44:42,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:44:42,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:44:42,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:42,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:44:42,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:44:42,918 INFO L87 Difference]: Start difference. First operand 2657 states and 4022 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 18:44:47,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:44:50,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:44:50,635 INFO L93 Difference]: Finished difference Result 3942 states and 6165 transitions. [2022-11-18 18:44:50,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 18:44:50,636 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2022-11-18 18:44:50,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:44:50,657 INFO L225 Difference]: With dead ends: 3942 [2022-11-18 18:44:50,658 INFO L226 Difference]: Without dead ends: 3937 [2022-11-18 18:44:50,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:44:50,661 INFO L413 NwaCegarLoop]: 870 mSDtfsCounter, 1306 mSDsluCounter, 1824 mSDsCounter, 0 mSdLazyCounter, 1848 mSolverCounterSat, 547 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 2694 SdHoareTripleChecker+Invalid, 2396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 1848 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:44:50,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1327 Valid, 2694 Invalid, 2396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 1848 Invalid, 1 Unknown, 0 Unchecked, 7.2s Time] [2022-11-18 18:44:50,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3937 states. [2022-11-18 18:44:50,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3937 to 3272. [2022-11-18 18:44:50,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3272 states, 2761 states have (on average 1.4791742122419413) internal successors, (4084), 2832 states have internal predecessors, (4084), 364 states have call successors, (364), 126 states have call predecessors, (364), 146 states have return successors, (557), 324 states have call predecessors, (557), 349 states have call successors, (557) [2022-11-18 18:44:50,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 5005 transitions. [2022-11-18 18:44:50,876 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 5005 transitions. Word has length 48 [2022-11-18 18:44:50,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:44:50,877 INFO L495 AbstractCegarLoop]: Abstraction has 3272 states and 5005 transitions. [2022-11-18 18:44:50,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 18:44:50,877 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 5005 transitions. [2022-11-18 18:44:50,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-18 18:44:50,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:44:50,879 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:50,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 18:44:50,880 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:44:50,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:50,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1759276290, now seen corresponding path program 1 times [2022-11-18 18:44:50,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:50,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112260785] [2022-11-18 18:44:50,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:50,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:50,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:51,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:44:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:51,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:44:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:51,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:51,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112260785] [2022-11-18 18:44:51,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112260785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:44:51,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:44:51,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:44:51,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076978030] [2022-11-18 18:44:51,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:44:51,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:44:51,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:51,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:44:51,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:44:51,437 INFO L87 Difference]: Start difference. First operand 3272 states and 5005 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 18:44:56,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:44:58,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:45:00,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:00,080 INFO L93 Difference]: Finished difference Result 7046 states and 10914 transitions. [2022-11-18 18:45:00,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 18:45:00,081 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-11-18 18:45:00,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:00,102 INFO L225 Difference]: With dead ends: 7046 [2022-11-18 18:45:00,102 INFO L226 Difference]: Without dead ends: 4021 [2022-11-18 18:45:00,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:45:00,115 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 2405 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 682 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2452 SdHoareTripleChecker+Valid, 2159 SdHoareTripleChecker+Invalid, 1969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 682 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:00,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2452 Valid, 2159 Invalid, 1969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [682 Valid, 1285 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2022-11-18 18:45:00,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2022-11-18 18:45:00,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 3266. [2022-11-18 18:45:00,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3266 states, 2755 states have (on average 1.4773139745916515) internal successors, (4070), 2826 states have internal predecessors, (4070), 364 states have call successors, (364), 126 states have call predecessors, (364), 146 states have return successors, (557), 324 states have call predecessors, (557), 349 states have call successors, (557) [2022-11-18 18:45:00,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 4991 transitions. [2022-11-18 18:45:00,340 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 4991 transitions. Word has length 46 [2022-11-18 18:45:00,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:00,340 INFO L495 AbstractCegarLoop]: Abstraction has 3266 states and 4991 transitions. [2022-11-18 18:45:00,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 18:45:00,341 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 4991 transitions. [2022-11-18 18:45:00,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-18 18:45:00,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:00,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:00,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 18:45:00,343 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:45:00,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:00,344 INFO L85 PathProgramCache]: Analyzing trace with hash 436509709, now seen corresponding path program 1 times [2022-11-18 18:45:00,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:45:00,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596503565] [2022-11-18 18:45:00,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:00,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:45:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:00,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:45:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:00,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:45:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:00,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-18 18:45:00,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:00,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:45:00,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596503565] [2022-11-18 18:45:00,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596503565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:45:00,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:45:00,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:45:00,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734436191] [2022-11-18 18:45:00,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:45:00,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:45:00,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:45:00,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:45:00,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:45:00,736 INFO L87 Difference]: Start difference. First operand 3266 states and 4991 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 18:45:04,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:45:07,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:07,882 INFO L93 Difference]: Finished difference Result 10834 states and 17245 transitions. [2022-11-18 18:45:07,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 18:45:07,883 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-11-18 18:45:07,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:07,937 INFO L225 Difference]: With dead ends: 10834 [2022-11-18 18:45:07,937 INFO L226 Difference]: Without dead ends: 7785 [2022-11-18 18:45:08,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-11-18 18:45:08,010 INFO L413 NwaCegarLoop]: 801 mSDtfsCounter, 2172 mSDsluCounter, 1768 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 628 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2248 SdHoareTripleChecker+Valid, 2569 SdHoareTripleChecker+Invalid, 2010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:08,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2248 Valid, 2569 Invalid, 2010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 1381 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2022-11-18 18:45:08,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7785 states. [2022-11-18 18:45:08,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7785 to 6900. [2022-11-18 18:45:08,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.4893324156916723) internal successors, (8656), 6037 states have internal predecessors, (8656), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2022-11-18 18:45:08,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10848 transitions. [2022-11-18 18:45:08,733 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10848 transitions. Word has length 47 [2022-11-18 18:45:08,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:08,735 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10848 transitions. [2022-11-18 18:45:08,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 18:45:08,735 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10848 transitions. [2022-11-18 18:45:08,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 18:45:08,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:08,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:08,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 18:45:08,738 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:45:08,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:08,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1335861569, now seen corresponding path program 1 times [2022-11-18 18:45:08,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:45:08,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166069383] [2022-11-18 18:45:08,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:08,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:45:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:09,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:45:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:09,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:45:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:09,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 18:45:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:09,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:45:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:09,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:09,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:45:09,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166069383] [2022-11-18 18:45:09,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166069383] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:45:09,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:45:09,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-18 18:45:09,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370932456] [2022-11-18 18:45:09,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:45:09,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:45:09,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:45:09,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:45:09,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:45:09,385 INFO L87 Difference]: Start difference. First operand 6900 states and 10848 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:45:15,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:45:18,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:18,943 INFO L93 Difference]: Finished difference Result 7819 states and 12472 transitions. [2022-11-18 18:45:18,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 18:45:18,944 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2022-11-18 18:45:18,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:18,979 INFO L225 Difference]: With dead ends: 7819 [2022-11-18 18:45:18,980 INFO L226 Difference]: Without dead ends: 7813 [2022-11-18 18:45:18,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2022-11-18 18:45:18,985 INFO L413 NwaCegarLoop]: 840 mSDtfsCounter, 2829 mSDsluCounter, 2145 mSDsCounter, 0 mSdLazyCounter, 2276 mSolverCounterSat, 1000 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2890 SdHoareTripleChecker+Valid, 2985 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1000 IncrementalHoareTripleChecker+Valid, 2276 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:18,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2890 Valid, 2985 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1000 Valid, 2276 Invalid, 1 Unknown, 0 Unchecked, 8.3s Time] [2022-11-18 18:45:18,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7813 states. [2022-11-18 18:45:19,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7813 to 6900. [2022-11-18 18:45:19,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.4891603578802477) internal successors, (8655), 6037 states have internal predecessors, (8655), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2022-11-18 18:45:19,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10847 transitions. [2022-11-18 18:45:19,621 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10847 transitions. Word has length 48 [2022-11-18 18:45:19,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:19,622 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10847 transitions. [2022-11-18 18:45:19,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:45:19,623 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10847 transitions. [2022-11-18 18:45:19,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-18 18:45:19,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:19,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:19,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 18:45:19,626 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:45:19,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:19,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1807638448, now seen corresponding path program 1 times [2022-11-18 18:45:19,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:45:19,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415653803] [2022-11-18 18:45:19,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:19,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:45:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:20,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:45:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:20,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:45:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:20,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 18:45:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:20,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:45:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:20,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:45:20,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415653803] [2022-11-18 18:45:20,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415653803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:45:20,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:45:20,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-18 18:45:20,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679085054] [2022-11-18 18:45:20,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:45:20,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:45:20,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:45:20,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:45:20,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:45:20,186 INFO L87 Difference]: Start difference. First operand 6900 states and 10847 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:45:26,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:45:28,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:45:32,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:32,640 INFO L93 Difference]: Finished difference Result 7815 states and 12466 transitions. [2022-11-18 18:45:32,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 18:45:32,641 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-11-18 18:45:32,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:32,673 INFO L225 Difference]: With dead ends: 7815 [2022-11-18 18:45:32,673 INFO L226 Difference]: Without dead ends: 7809 [2022-11-18 18:45:32,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2022-11-18 18:45:32,678 INFO L413 NwaCegarLoop]: 840 mSDtfsCounter, 2414 mSDsluCounter, 2490 mSDsCounter, 0 mSdLazyCounter, 2808 mSolverCounterSat, 756 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2475 SdHoareTripleChecker+Valid, 3330 SdHoareTripleChecker+Invalid, 3566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 2808 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:32,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2475 Valid, 3330 Invalid, 3566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [756 Valid, 2808 Invalid, 2 Unknown, 0 Unchecked, 11.2s Time] [2022-11-18 18:45:32,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7809 states. [2022-11-18 18:45:33,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7809 to 6900. [2022-11-18 18:45:33,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.488988300068823) internal successors, (8654), 6037 states have internal predecessors, (8654), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2022-11-18 18:45:33,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10846 transitions. [2022-11-18 18:45:33,391 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10846 transitions. Word has length 50 [2022-11-18 18:45:33,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:33,391 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10846 transitions. [2022-11-18 18:45:33,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:45:33,392 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10846 transitions. [2022-11-18 18:45:33,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-18 18:45:33,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:33,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:33,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 18:45:33,394 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:45:33,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:33,394 INFO L85 PathProgramCache]: Analyzing trace with hash -376802648, now seen corresponding path program 1 times [2022-11-18 18:45:33,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:45:33,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931318146] [2022-11-18 18:45:33,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:33,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:45:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:33,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:45:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:33,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:45:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:33,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 18:45:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:34,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:45:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:34,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:45:34,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931318146] [2022-11-18 18:45:34,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931318146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:45:34,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:45:34,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-18 18:45:34,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665156438] [2022-11-18 18:45:34,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:45:34,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:45:34,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:45:34,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:45:34,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:45:34,072 INFO L87 Difference]: Start difference. First operand 6900 states and 10846 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 18:45:39,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:45:41,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:45:43,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:43,825 INFO L93 Difference]: Finished difference Result 7824 states and 12487 transitions. [2022-11-18 18:45:43,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 18:45:43,826 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2022-11-18 18:45:43,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:43,858 INFO L225 Difference]: With dead ends: 7824 [2022-11-18 18:45:43,858 INFO L226 Difference]: Without dead ends: 7807 [2022-11-18 18:45:43,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:45:43,868 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 717 mSDsluCounter, 2806 mSDsCounter, 0 mSdLazyCounter, 2272 mSolverCounterSat, 244 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 3381 SdHoareTripleChecker+Invalid, 2518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 2272 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:43,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 3381 Invalid, 2518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 2272 Invalid, 2 Unknown, 0 Unchecked, 8.9s Time] [2022-11-18 18:45:43,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7807 states. [2022-11-18 18:45:44,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7807 to 6904. [2022-11-18 18:45:44,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 5815 states have (on average 1.4885640584694755) internal successors, (8656), 6042 states have internal predecessors, (8656), 800 states have call successors, (800), 234 states have call predecessors, (800), 288 states have return successors, (1397), 658 states have call predecessors, (1397), 788 states have call successors, (1397) [2022-11-18 18:45:44,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 10853 transitions. [2022-11-18 18:45:44,599 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 10853 transitions. Word has length 50 [2022-11-18 18:45:44,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:44,599 INFO L495 AbstractCegarLoop]: Abstraction has 6904 states and 10853 transitions. [2022-11-18 18:45:44,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 18:45:44,600 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 10853 transitions. [2022-11-18 18:45:44,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-18 18:45:44,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:44,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:44,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 18:45:44,604 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:45:44,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:44,605 INFO L85 PathProgramCache]: Analyzing trace with hash 286289769, now seen corresponding path program 1 times [2022-11-18 18:45:44,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:45:44,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131298272] [2022-11-18 18:45:44,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:44,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:45:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:45,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:45:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:45,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:45:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:45,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 18:45:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:45,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:45:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:45,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:45:45,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131298272] [2022-11-18 18:45:45,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131298272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:45:45,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:45:45,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-18 18:45:45,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143150023] [2022-11-18 18:45:45,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:45:45,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:45:45,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:45:45,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:45:45,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:45:45,271 INFO L87 Difference]: Start difference. First operand 6904 states and 10853 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 18:45:51,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:45:53,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:45:55,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:55,082 INFO L93 Difference]: Finished difference Result 7822 states and 12483 transitions. [2022-11-18 18:45:55,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 18:45:55,083 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2022-11-18 18:45:55,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:55,112 INFO L225 Difference]: With dead ends: 7822 [2022-11-18 18:45:55,112 INFO L226 Difference]: Without dead ends: 7800 [2022-11-18 18:45:55,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:45:55,119 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 715 mSDsluCounter, 2806 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 240 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 3381 SdHoareTripleChecker+Invalid, 2508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:55,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 3381 Invalid, 2508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 2266 Invalid, 2 Unknown, 0 Unchecked, 9.1s Time] [2022-11-18 18:45:55,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7800 states. [2022-11-18 18:45:55,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7800 to 6897. [2022-11-18 18:45:55,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6897 states, 5811 states have (on average 1.4887282739631733) internal successors, (8651), 6038 states have internal predecessors, (8651), 798 states have call successors, (798), 233 states have call predecessors, (798), 287 states have return successors, (1395), 656 states have call predecessors, (1395), 786 states have call successors, (1395) [2022-11-18 18:45:55,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 10844 transitions. [2022-11-18 18:45:55,673 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 10844 transitions. Word has length 51 [2022-11-18 18:45:55,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:55,674 INFO L495 AbstractCegarLoop]: Abstraction has 6897 states and 10844 transitions. [2022-11-18 18:45:55,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 18:45:55,674 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 10844 transitions. [2022-11-18 18:45:55,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-18 18:45:55,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:55,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:55,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 18:45:55,676 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:45:55,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:55,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1945256571, now seen corresponding path program 1 times [2022-11-18 18:45:55,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:45:55,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873799525] [2022-11-18 18:45:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:55,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:45:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:55,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:45:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:55,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:45:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:55,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 18:45:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:56,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:56,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:45:56,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873799525] [2022-11-18 18:45:56,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873799525] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:45:56,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:45:56,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:45:56,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417129443] [2022-11-18 18:45:56,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:45:56,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:45:56,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:45:56,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:45:56,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:45:56,101 INFO L87 Difference]: Start difference. First operand 6897 states and 10844 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 18:46:00,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:46:02,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:02,043 INFO L93 Difference]: Finished difference Result 13804 states and 22175 transitions. [2022-11-18 18:46:02,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:46:02,043 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-11-18 18:46:02,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:02,076 INFO L225 Difference]: With dead ends: 13804 [2022-11-18 18:46:02,076 INFO L226 Difference]: Without dead ends: 8064 [2022-11-18 18:46:02,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:46:02,106 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 434 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 213 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 1981 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:02,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 1981 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1010 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2022-11-18 18:46:02,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8064 states. [2022-11-18 18:46:02,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8064 to 7053. [2022-11-18 18:46:02,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7053 states, 5967 states have (on average 1.4799731858555387) internal successors, (8831), 6194 states have internal predecessors, (8831), 798 states have call successors, (798), 233 states have call predecessors, (798), 287 states have return successors, (1395), 656 states have call predecessors, (1395), 786 states have call successors, (1395) [2022-11-18 18:46:02,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7053 states to 7053 states and 11024 transitions. [2022-11-18 18:46:02,669 INFO L78 Accepts]: Start accepts. Automaton has 7053 states and 11024 transitions. Word has length 52 [2022-11-18 18:46:02,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:02,669 INFO L495 AbstractCegarLoop]: Abstraction has 7053 states and 11024 transitions. [2022-11-18 18:46:02,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 18:46:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand 7053 states and 11024 transitions. [2022-11-18 18:46:02,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-18 18:46:02,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:02,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:02,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-18 18:46:02,673 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:46:02,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:02,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1217127572, now seen corresponding path program 1 times [2022-11-18 18:46:02,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:02,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844621163] [2022-11-18 18:46:02,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:02,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:02,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:46:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:03,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:46:03,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:03,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 18:46:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:03,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:03,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844621163] [2022-11-18 18:46:03,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844621163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:03,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:03,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:46:03,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139606062] [2022-11-18 18:46:03,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:03,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:46:03,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:03,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:46:03,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:46:03,040 INFO L87 Difference]: Start difference. First operand 7053 states and 11024 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 18:46:07,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:46:09,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:09,505 INFO L93 Difference]: Finished difference Result 8020 states and 12715 transitions. [2022-11-18 18:46:09,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 18:46:09,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2022-11-18 18:46:09,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:09,536 INFO L225 Difference]: With dead ends: 8020 [2022-11-18 18:46:09,536 INFO L226 Difference]: Without dead ends: 8002 [2022-11-18 18:46:09,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:46:09,541 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 907 mSDsluCounter, 2093 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 335 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 2676 SdHoareTripleChecker+Invalid, 1868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:09,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 2676 Invalid, 1868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 1532 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2022-11-18 18:46:09,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8002 states. [2022-11-18 18:46:10,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8002 to 7051. [2022-11-18 18:46:10,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7051 states, 5966 states have (on average 1.479886020784445) internal successors, (8829), 6193 states have internal predecessors, (8829), 797 states have call successors, (797), 233 states have call predecessors, (797), 287 states have return successors, (1394), 655 states have call predecessors, (1394), 785 states have call successors, (1394) [2022-11-18 18:46:10,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7051 states to 7051 states and 11020 transitions. [2022-11-18 18:46:10,365 INFO L78 Accepts]: Start accepts. Automaton has 7051 states and 11020 transitions. Word has length 53 [2022-11-18 18:46:10,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:10,365 INFO L495 AbstractCegarLoop]: Abstraction has 7051 states and 11020 transitions. [2022-11-18 18:46:10,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 18:46:10,366 INFO L276 IsEmpty]: Start isEmpty. Operand 7051 states and 11020 transitions. [2022-11-18 18:46:10,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-18 18:46:10,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:10,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:10,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-18 18:46:10,368 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:46:10,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:10,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1937199149, now seen corresponding path program 1 times [2022-11-18 18:46:10,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:10,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164057981] [2022-11-18 18:46:10,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:10,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:10,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:46:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:10,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:46:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:10,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:10,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164057981] [2022-11-18 18:46:10,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164057981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:10,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:10,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:46:10,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099479638] [2022-11-18 18:46:10,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:10,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:46:10,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:10,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:46:10,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:46:10,777 INFO L87 Difference]: Start difference. First operand 7051 states and 11020 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 18:46:15,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:46:16,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:16,753 INFO L93 Difference]: Finished difference Result 11721 states and 18614 transitions. [2022-11-18 18:46:16,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 18:46:16,760 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-11-18 18:46:16,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:16,790 INFO L225 Difference]: With dead ends: 11721 [2022-11-18 18:46:16,790 INFO L226 Difference]: Without dead ends: 7953 [2022-11-18 18:46:16,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:46:16,813 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 1226 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 311 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:16,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1277 Valid, 1759 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1005 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2022-11-18 18:46:16,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7953 states. [2022-11-18 18:46:17,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7953 to 7041. [2022-11-18 18:46:17,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7041 states, 5957 states have (on average 1.4787644787644787) internal successors, (8809), 6184 states have internal predecessors, (8809), 797 states have call successors, (797), 233 states have call predecessors, (797), 286 states have return successors, (1393), 654 states have call predecessors, (1393), 784 states have call successors, (1393) [2022-11-18 18:46:17,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7041 states to 7041 states and 10999 transitions. [2022-11-18 18:46:17,562 INFO L78 Accepts]: Start accepts. Automaton has 7041 states and 10999 transitions. Word has length 52 [2022-11-18 18:46:17,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:17,563 INFO L495 AbstractCegarLoop]: Abstraction has 7041 states and 10999 transitions. [2022-11-18 18:46:17,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 18:46:17,563 INFO L276 IsEmpty]: Start isEmpty. Operand 7041 states and 10999 transitions. [2022-11-18 18:46:17,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-18 18:46:17,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:17,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:17,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-18 18:46:17,566 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:46:17,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:17,566 INFO L85 PathProgramCache]: Analyzing trace with hash 872726643, now seen corresponding path program 1 times [2022-11-18 18:46:17,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:17,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830557206] [2022-11-18 18:46:17,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:17,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:17,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:46:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:17,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:46:17,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:18,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 18:46:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:18,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-18 18:46:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:18,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:18,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830557206] [2022-11-18 18:46:18,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830557206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:18,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:18,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-18 18:46:18,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475645186] [2022-11-18 18:46:18,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:18,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:46:18,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:18,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:46:18,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:46:18,094 INFO L87 Difference]: Start difference. First operand 7041 states and 10999 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 18:46:23,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:46:24,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:24,815 INFO L93 Difference]: Finished difference Result 8024 states and 12754 transitions. [2022-11-18 18:46:24,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 18:46:24,816 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2022-11-18 18:46:24,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:24,844 INFO L225 Difference]: With dead ends: 8024 [2022-11-18 18:46:24,844 INFO L226 Difference]: Without dead ends: 8008 [2022-11-18 18:46:24,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:46:24,849 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 978 mSDsluCounter, 2603 mSDsCounter, 0 mSdLazyCounter, 1867 mSolverCounterSat, 433 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 3182 SdHoareTripleChecker+Invalid, 2301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 1867 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:24,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1001 Valid, 3182 Invalid, 2301 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [433 Valid, 1867 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2022-11-18 18:46:24,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8008 states. [2022-11-18 18:46:25,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8008 to 7047. [2022-11-18 18:46:25,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 5960 states have (on average 1.4785234899328858) internal successors, (8812), 6190 states have internal predecessors, (8812), 797 states have call successors, (797), 233 states have call predecessors, (797), 289 states have return successors, (1415), 654 states have call predecessors, (1415), 784 states have call successors, (1415) [2022-11-18 18:46:25,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 11024 transitions. [2022-11-18 18:46:25,498 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 11024 transitions. Word has length 55 [2022-11-18 18:46:25,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:25,498 INFO L495 AbstractCegarLoop]: Abstraction has 7047 states and 11024 transitions. [2022-11-18 18:46:25,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 18:46:25,499 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 11024 transitions. [2022-11-18 18:46:25,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-18 18:46:25,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:25,500 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:25,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-18 18:46:25,500 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:46:25,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:25,501 INFO L85 PathProgramCache]: Analyzing trace with hash 555700014, now seen corresponding path program 1 times [2022-11-18 18:46:25,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:25,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064729183] [2022-11-18 18:46:25,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:25,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:25,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:46:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:25,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:46:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:25,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:25,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064729183] [2022-11-18 18:46:25,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064729183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:25,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:25,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:46:25,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511595989] [2022-11-18 18:46:25,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:25,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:46:25,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:25,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:46:25,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:46:25,763 INFO L87 Difference]: Start difference. First operand 7047 states and 11024 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 18:46:30,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:46:32,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:46:35,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:35,736 INFO L93 Difference]: Finished difference Result 10992 states and 17757 transitions. [2022-11-18 18:46:35,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:46:35,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2022-11-18 18:46:35,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:35,763 INFO L225 Difference]: With dead ends: 10992 [2022-11-18 18:46:35,763 INFO L226 Difference]: Without dead ends: 10979 [2022-11-18 18:46:35,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:46:35,768 INFO L413 NwaCegarLoop]: 1030 mSDtfsCounter, 998 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 276 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 2831 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:35,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1029 Valid, 2831 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 1357 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2022-11-18 18:46:35,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10979 states. [2022-11-18 18:46:36,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10979 to 8362. [2022-11-18 18:46:36,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8362 states, 7112 states have (on average 1.4822834645669292) internal successors, (10542), 7344 states have internal predecessors, (10542), 910 states have call successors, (910), 275 states have call predecessors, (910), 339 states have return successors, (1687), 773 states have call predecessors, (1687), 897 states have call successors, (1687) [2022-11-18 18:46:36,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8362 states to 8362 states and 13139 transitions. [2022-11-18 18:46:36,686 INFO L78 Accepts]: Start accepts. Automaton has 8362 states and 13139 transitions. Word has length 54 [2022-11-18 18:46:36,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:36,686 INFO L495 AbstractCegarLoop]: Abstraction has 8362 states and 13139 transitions. [2022-11-18 18:46:36,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 18:46:36,687 INFO L276 IsEmpty]: Start isEmpty. Operand 8362 states and 13139 transitions. [2022-11-18 18:46:36,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-18 18:46:36,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:36,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:36,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-18 18:46:36,690 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:46:36,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:36,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1129689134, now seen corresponding path program 1 times [2022-11-18 18:46:36,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:36,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713886575] [2022-11-18 18:46:36,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:36,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:37,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:46:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:37,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:46:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:37,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:37,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713886575] [2022-11-18 18:46:37,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713886575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:37,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:37,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:46:37,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152563963] [2022-11-18 18:46:37,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:37,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:46:37,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:37,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:46:37,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:46:37,137 INFO L87 Difference]: Start difference. First operand 8362 states and 13139 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 18:46:41,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:46:43,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:43,163 INFO L93 Difference]: Finished difference Result 13163 states and 20813 transitions. [2022-11-18 18:46:43,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 18:46:43,164 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-11-18 18:46:43,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:43,200 INFO L225 Difference]: With dead ends: 13163 [2022-11-18 18:46:43,201 INFO L226 Difference]: Without dead ends: 8839 [2022-11-18 18:46:43,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:46:43,222 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 1208 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 296 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1259 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:43,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1259 Valid, 1759 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 960 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2022-11-18 18:46:43,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8839 states. [2022-11-18 18:46:43,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8839 to 6799. [2022-11-18 18:46:43,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6799 states, 5772 states have (on average 1.48007623007623) internal successors, (8543), 5976 states have internal predecessors, (8543), 751 states have call successors, (751), 230 states have call predecessors, (751), 275 states have return successors, (1161), 623 states have call predecessors, (1161), 738 states have call successors, (1161) [2022-11-18 18:46:43,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6799 states to 6799 states and 10455 transitions. [2022-11-18 18:46:43,914 INFO L78 Accepts]: Start accepts. Automaton has 6799 states and 10455 transitions. Word has length 54 [2022-11-18 18:46:43,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:43,915 INFO L495 AbstractCegarLoop]: Abstraction has 6799 states and 10455 transitions. [2022-11-18 18:46:43,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 18:46:43,915 INFO L276 IsEmpty]: Start isEmpty. Operand 6799 states and 10455 transitions. [2022-11-18 18:46:43,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-18 18:46:43,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:43,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:43,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-18 18:46:43,916 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:46:43,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:43,917 INFO L85 PathProgramCache]: Analyzing trace with hash 238766756, now seen corresponding path program 1 times [2022-11-18 18:46:43,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:43,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030942540] [2022-11-18 18:46:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:43,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:44,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:46:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:44,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:46:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:44,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-18 18:46:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:44,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:44,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030942540] [2022-11-18 18:46:44,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030942540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:44,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:44,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:46:44,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896913784] [2022-11-18 18:46:44,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:44,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:46:44,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:44,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:46:44,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:46:44,345 INFO L87 Difference]: Start difference. First operand 6799 states and 10455 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 18:46:49,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:46:51,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:51,464 INFO L93 Difference]: Finished difference Result 7691 states and 11990 transitions. [2022-11-18 18:46:51,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 18:46:51,465 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2022-11-18 18:46:51,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:51,489 INFO L225 Difference]: With dead ends: 7691 [2022-11-18 18:46:51,489 INFO L226 Difference]: Without dead ends: 7673 [2022-11-18 18:46:51,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:46:51,494 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 900 mSDsluCounter, 2096 mSDsCounter, 0 mSdLazyCounter, 1531 mSolverCounterSat, 332 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 1864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1531 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:51,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 2682 Invalid, 1864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1531 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2022-11-18 18:46:51,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7673 states. [2022-11-18 18:46:52,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7673 to 6796. [2022-11-18 18:46:52,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6796 states, 5770 states have (on average 1.4800693240901213) internal successors, (8540), 5974 states have internal predecessors, (8540), 750 states have call successors, (750), 230 states have call predecessors, (750), 275 states have return successors, (1160), 622 states have call predecessors, (1160), 737 states have call successors, (1160) [2022-11-18 18:46:52,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6796 states to 6796 states and 10450 transitions. [2022-11-18 18:46:52,319 INFO L78 Accepts]: Start accepts. Automaton has 6796 states and 10450 transitions. Word has length 55 [2022-11-18 18:46:52,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:52,319 INFO L495 AbstractCegarLoop]: Abstraction has 6796 states and 10450 transitions. [2022-11-18 18:46:52,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 18:46:52,320 INFO L276 IsEmpty]: Start isEmpty. Operand 6796 states and 10450 transitions. [2022-11-18 18:46:52,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-18 18:46:52,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:52,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:52,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-18 18:46:52,322 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:46:52,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:52,323 INFO L85 PathProgramCache]: Analyzing trace with hash 499005845, now seen corresponding path program 1 times [2022-11-18 18:46:52,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:52,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943612698] [2022-11-18 18:46:52,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:52,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:52,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:46:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:52,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:46:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:52,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:52,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943612698] [2022-11-18 18:46:52,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943612698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:52,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:52,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:46:52,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909373056] [2022-11-18 18:46:52,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:52,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:46:52,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:52,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:46:52,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:46:52,748 INFO L87 Difference]: Start difference. First operand 6796 states and 10450 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 18:46:57,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:47:00,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:00,192 INFO L93 Difference]: Finished difference Result 9126 states and 14313 transitions. [2022-11-18 18:47:00,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 18:47:00,192 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-11-18 18:47:00,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:00,213 INFO L225 Difference]: With dead ends: 9126 [2022-11-18 18:47:00,213 INFO L226 Difference]: Without dead ends: 9122 [2022-11-18 18:47:00,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:47:00,217 INFO L413 NwaCegarLoop]: 975 mSDtfsCounter, 1708 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 487 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1766 SdHoareTripleChecker+Valid, 2616 SdHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:00,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1766 Valid, 2616 Invalid, 1924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 1436 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2022-11-18 18:47:00,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9122 states. [2022-11-18 18:47:00,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9122 to 6807. [2022-11-18 18:47:00,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6807 states, 5780 states have (on average 1.479757785467128) internal successors, (8553), 5982 states have internal predecessors, (8553), 750 states have call successors, (750), 230 states have call predecessors, (750), 276 states have return successors, (1164), 625 states have call predecessors, (1164), 737 states have call successors, (1164) [2022-11-18 18:47:00,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6807 states to 6807 states and 10467 transitions. [2022-11-18 18:47:00,903 INFO L78 Accepts]: Start accepts. Automaton has 6807 states and 10467 transitions. Word has length 55 [2022-11-18 18:47:00,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:00,903 INFO L495 AbstractCegarLoop]: Abstraction has 6807 states and 10467 transitions. [2022-11-18 18:47:00,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 18:47:00,904 INFO L276 IsEmpty]: Start isEmpty. Operand 6807 states and 10467 transitions. [2022-11-18 18:47:00,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-18 18:47:00,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:00,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:00,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-18 18:47:00,905 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:47:00,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:00,906 INFO L85 PathProgramCache]: Analyzing trace with hash 499282675, now seen corresponding path program 1 times [2022-11-18 18:47:00,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:00,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624496961] [2022-11-18 18:47:00,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:00,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:01,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:47:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:01,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:47:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:01,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:01,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624496961] [2022-11-18 18:47:01,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624496961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:01,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:01,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 18:47:01,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726729074] [2022-11-18 18:47:01,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:01,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:47:01,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:01,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:47:01,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:47:01,387 INFO L87 Difference]: Start difference. First operand 6807 states and 10467 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 18:47:06,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:47:07,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:07,695 INFO L93 Difference]: Finished difference Result 7650 states and 11920 transitions. [2022-11-18 18:47:07,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:47:07,696 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2022-11-18 18:47:07,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:07,716 INFO L225 Difference]: With dead ends: 7650 [2022-11-18 18:47:07,716 INFO L226 Difference]: Without dead ends: 7607 [2022-11-18 18:47:07,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:47:07,720 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 423 mSDsluCounter, 2955 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 179 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 3564 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:07,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 3564 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1539 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2022-11-18 18:47:07,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7607 states. [2022-11-18 18:47:08,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7607 to 6777. [2022-11-18 18:47:08,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6777 states, 5751 states have (on average 1.480264301860546) internal successors, (8513), 5953 states have internal predecessors, (8513), 749 states have call successors, (749), 230 states have call predecessors, (749), 276 states have return successors, (1162), 624 states have call predecessors, (1162), 736 states have call successors, (1162) [2022-11-18 18:47:08,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6777 states to 6777 states and 10424 transitions. [2022-11-18 18:47:08,602 INFO L78 Accepts]: Start accepts. Automaton has 6777 states and 10424 transitions. Word has length 55 [2022-11-18 18:47:08,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:08,602 INFO L495 AbstractCegarLoop]: Abstraction has 6777 states and 10424 transitions. [2022-11-18 18:47:08,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 18:47:08,602 INFO L276 IsEmpty]: Start isEmpty. Operand 6777 states and 10424 transitions. [2022-11-18 18:47:08,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-18 18:47:08,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:08,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:08,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-18 18:47:08,605 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:47:08,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:08,605 INFO L85 PathProgramCache]: Analyzing trace with hash 948026652, now seen corresponding path program 1 times [2022-11-18 18:47:08,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:08,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159161439] [2022-11-18 18:47:08,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:08,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:08,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:47:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:08,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:47:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:08,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 18:47:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:09,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 18:47:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:09,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:09,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159161439] [2022-11-18 18:47:09,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159161439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:09,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:09,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-18 18:47:09,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807369281] [2022-11-18 18:47:09,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:09,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:47:09,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:09,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:47:09,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:47:09,207 INFO L87 Difference]: Start difference. First operand 6777 states and 10424 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 18:47:15,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:47:17,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:17,198 INFO L93 Difference]: Finished difference Result 13421 states and 21123 transitions. [2022-11-18 18:47:17,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 18:47:17,199 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2022-11-18 18:47:17,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:17,221 INFO L225 Difference]: With dead ends: 13421 [2022-11-18 18:47:17,221 INFO L226 Difference]: Without dead ends: 7857 [2022-11-18 18:47:17,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:47:17,237 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 401 mSDsluCounter, 2420 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 209 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 2978 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:17,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 2978 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1791 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2022-11-18 18:47:17,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7857 states. [2022-11-18 18:47:17,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7857 to 6853. [2022-11-18 18:47:17,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6853 states, 5807 states have (on average 1.4756328568968486) internal successors, (8569), 6017 states have internal predecessors, (8569), 749 states have call successors, (749), 230 states have call predecessors, (749), 296 states have return successors, (1233), 636 states have call predecessors, (1233), 736 states have call successors, (1233) [2022-11-18 18:47:17,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6853 states to 6853 states and 10551 transitions. [2022-11-18 18:47:17,986 INFO L78 Accepts]: Start accepts. Automaton has 6853 states and 10551 transitions. Word has length 60 [2022-11-18 18:47:17,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:17,987 INFO L495 AbstractCegarLoop]: Abstraction has 6853 states and 10551 transitions. [2022-11-18 18:47:17,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 18:47:17,987 INFO L276 IsEmpty]: Start isEmpty. Operand 6853 states and 10551 transitions. [2022-11-18 18:47:17,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-18 18:47:17,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:17,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:17,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-18 18:47:17,990 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:47:17,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:17,991 INFO L85 PathProgramCache]: Analyzing trace with hash -749476623, now seen corresponding path program 1 times [2022-11-18 18:47:17,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:17,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815861387] [2022-11-18 18:47:17,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:17,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:18,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:47:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:18,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:47:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:18,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 18:47:18,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:18,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 18:47:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:18,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:18,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815861387] [2022-11-18 18:47:18,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815861387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:18,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:18,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 18:47:18,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558913635] [2022-11-18 18:47:18,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:18,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:47:18,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:18,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:47:18,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:47:18,863 INFO L87 Difference]: Start difference. First operand 6853 states and 10551 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 18:47:26,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:47:29,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:29,369 INFO L93 Difference]: Finished difference Result 7755 states and 12177 transitions. [2022-11-18 18:47:29,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 18:47:29,370 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2022-11-18 18:47:29,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:29,389 INFO L225 Difference]: With dead ends: 7755 [2022-11-18 18:47:29,389 INFO L226 Difference]: Without dead ends: 7741 [2022-11-18 18:47:29,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:47:29,393 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 952 mSDsluCounter, 3500 mSDsCounter, 0 mSdLazyCounter, 3004 mSolverCounterSat, 429 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 4024 SdHoareTripleChecker+Invalid, 3434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 3004 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:29,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 4024 Invalid, 3434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 3004 Invalid, 1 Unknown, 0 Unchecked, 9.2s Time] [2022-11-18 18:47:29,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7741 states. [2022-11-18 18:47:30,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7741 to 6855. [2022-11-18 18:47:30,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6855 states, 5808 states have (on average 1.475550964187328) internal successors, (8570), 6019 states have internal predecessors, (8570), 749 states have call successors, (749), 230 states have call predecessors, (749), 297 states have return successors, (1248), 636 states have call predecessors, (1248), 736 states have call successors, (1248) [2022-11-18 18:47:30,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6855 states to 6855 states and 10567 transitions. [2022-11-18 18:47:30,045 INFO L78 Accepts]: Start accepts. Automaton has 6855 states and 10567 transitions. Word has length 62 [2022-11-18 18:47:30,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:30,045 INFO L495 AbstractCegarLoop]: Abstraction has 6855 states and 10567 transitions. [2022-11-18 18:47:30,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 18:47:30,045 INFO L276 IsEmpty]: Start isEmpty. Operand 6855 states and 10567 transitions. [2022-11-18 18:47:30,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-18 18:47:30,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:30,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:30,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-18 18:47:30,047 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:47:30,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:30,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1416668636, now seen corresponding path program 1 times [2022-11-18 18:47:30,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:30,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989687092] [2022-11-18 18:47:30,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:30,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:30,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:30,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:47:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:30,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:47:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:30,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 18:47:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:30,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 18:47:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:30,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:47:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:30,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 18:47:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:30,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:30,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989687092] [2022-11-18 18:47:30,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989687092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:30,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:30,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:47:30,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702549877] [2022-11-18 18:47:30,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:30,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:47:30,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:30,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:47:30,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:47:30,468 INFO L87 Difference]: Start difference. First operand 6855 states and 10567 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 18:47:35,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:47:37,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:47:41,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:41,806 INFO L93 Difference]: Finished difference Result 10875 states and 17003 transitions. [2022-11-18 18:47:41,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 18:47:41,807 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 65 [2022-11-18 18:47:41,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:41,831 INFO L225 Difference]: With dead ends: 10875 [2022-11-18 18:47:41,831 INFO L226 Difference]: Without dead ends: 7624 [2022-11-18 18:47:41,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-18 18:47:41,843 INFO L413 NwaCegarLoop]: 948 mSDtfsCounter, 965 mSDsluCounter, 1881 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 350 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 2829 SdHoareTripleChecker+Invalid, 2253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1901 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:41,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1008 Valid, 2829 Invalid, 2253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 1901 Invalid, 2 Unknown, 0 Unchecked, 10.0s Time] [2022-11-18 18:47:41,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7624 states. [2022-11-18 18:47:42,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7624 to 6723. [2022-11-18 18:47:42,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6723 states, 5693 states have (on average 1.476725803618479) internal successors, (8407), 5908 states have internal predecessors, (8407), 738 states have call successors, (738), 227 states have call predecessors, (738), 291 states have return successors, (1189), 617 states have call predecessors, (1189), 717 states have call successors, (1189) [2022-11-18 18:47:42,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6723 states to 6723 states and 10334 transitions. [2022-11-18 18:47:42,534 INFO L78 Accepts]: Start accepts. Automaton has 6723 states and 10334 transitions. Word has length 65 [2022-11-18 18:47:42,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:42,534 INFO L495 AbstractCegarLoop]: Abstraction has 6723 states and 10334 transitions. [2022-11-18 18:47:42,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 18:47:42,535 INFO L276 IsEmpty]: Start isEmpty. Operand 6723 states and 10334 transitions. [2022-11-18 18:47:42,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-18 18:47:42,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:42,537 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:42,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-18 18:47:42,538 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:47:42,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:42,539 INFO L85 PathProgramCache]: Analyzing trace with hash -340114262, now seen corresponding path program 1 times [2022-11-18 18:47:42,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:42,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015211631] [2022-11-18 18:47:42,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:42,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:42,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:47:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:42,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:47:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:42,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 18:47:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:42,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:47:42,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:42,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 18:47:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:42,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:42,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015211631] [2022-11-18 18:47:42,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015211631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:42,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:42,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:47:42,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90167114] [2022-11-18 18:47:42,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:42,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:47:42,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:42,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:47:42,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:47:42,962 INFO L87 Difference]: Start difference. First operand 6723 states and 10334 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-18 18:47:47,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:47:49,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:49,146 INFO L93 Difference]: Finished difference Result 13105 states and 20530 transitions. [2022-11-18 18:47:49,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:47:49,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 66 [2022-11-18 18:47:49,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:49,169 INFO L225 Difference]: With dead ends: 13105 [2022-11-18 18:47:49,169 INFO L226 Difference]: Without dead ends: 7568 [2022-11-18 18:47:49,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:47:49,187 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 466 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 267 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 1730 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:49,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 1730 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 906 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2022-11-18 18:47:49,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7568 states. [2022-11-18 18:47:49,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7568 to 6629. [2022-11-18 18:47:49,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6629 states, 5601 states have (on average 1.4767005891805034) internal successors, (8271), 5826 states have internal predecessors, (8271), 744 states have call successors, (744), 227 states have call predecessors, (744), 283 states have return successors, (1184), 605 states have call predecessors, (1184), 723 states have call successors, (1184) [2022-11-18 18:47:49,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6629 states to 6629 states and 10199 transitions. [2022-11-18 18:47:49,807 INFO L78 Accepts]: Start accepts. Automaton has 6629 states and 10199 transitions. Word has length 66 [2022-11-18 18:47:49,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:49,807 INFO L495 AbstractCegarLoop]: Abstraction has 6629 states and 10199 transitions. [2022-11-18 18:47:49,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-18 18:47:49,808 INFO L276 IsEmpty]: Start isEmpty. Operand 6629 states and 10199 transitions. [2022-11-18 18:47:49,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-18 18:47:49,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:49,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:49,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-18 18:47:49,811 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:47:49,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:49,811 INFO L85 PathProgramCache]: Analyzing trace with hash 437037204, now seen corresponding path program 1 times [2022-11-18 18:47:49,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:49,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123970937] [2022-11-18 18:47:49,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:49,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:50,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:47:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:50,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:47:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:50,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 18:47:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:50,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:50,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123970937] [2022-11-18 18:47:50,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123970937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:50,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:50,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 18:47:50,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857775365] [2022-11-18 18:47:50,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:50,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:47:50,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:50,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:47:50,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:47:50,408 INFO L87 Difference]: Start difference. First operand 6629 states and 10199 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 18:47:57,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:48:00,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:00,331 INFO L93 Difference]: Finished difference Result 7477 states and 11670 transitions. [2022-11-18 18:48:00,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 18:48:00,332 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 65 [2022-11-18 18:48:00,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:00,351 INFO L225 Difference]: With dead ends: 7477 [2022-11-18 18:48:00,351 INFO L226 Difference]: Without dead ends: 7459 [2022-11-18 18:48:00,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:48:00,355 INFO L413 NwaCegarLoop]: 531 mSDtfsCounter, 902 mSDsluCounter, 3120 mSDsCounter, 0 mSdLazyCounter, 2630 mSolverCounterSat, 331 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 3651 SdHoareTripleChecker+Invalid, 2962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 2630 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:00,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [926 Valid, 3651 Invalid, 2962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 2630 Invalid, 1 Unknown, 0 Unchecked, 8.7s Time] [2022-11-18 18:48:00,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7459 states. [2022-11-18 18:48:00,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7459 to 6625. [2022-11-18 18:48:00,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6625 states, 5598 states have (on average 1.476777420507324) internal successors, (8267), 5823 states have internal predecessors, (8267), 743 states have call successors, (743), 227 states have call predecessors, (743), 283 states have return successors, (1183), 604 states have call predecessors, (1183), 722 states have call successors, (1183) [2022-11-18 18:48:00,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6625 states to 6625 states and 10193 transitions. [2022-11-18 18:48:00,992 INFO L78 Accepts]: Start accepts. Automaton has 6625 states and 10193 transitions. Word has length 65 [2022-11-18 18:48:00,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:00,993 INFO L495 AbstractCegarLoop]: Abstraction has 6625 states and 10193 transitions. [2022-11-18 18:48:00,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 18:48:00,993 INFO L276 IsEmpty]: Start isEmpty. Operand 6625 states and 10193 transitions. [2022-11-18 18:48:00,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-18 18:48:00,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:00,995 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:00,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-18 18:48:00,995 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:48:00,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:00,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1869722635, now seen corresponding path program 1 times [2022-11-18 18:48:00,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:00,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081779260] [2022-11-18 18:48:00,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:00,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:01,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:48:01,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:01,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:48:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:01,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 18:48:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:01,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 18:48:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:01,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:01,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081779260] [2022-11-18 18:48:01,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081779260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:01,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:48:01,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:48:01,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354738375] [2022-11-18 18:48:01,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:01,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:48:01,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:01,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:48:01,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:48:01,447 INFO L87 Difference]: Start difference. First operand 6625 states and 10193 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:48:07,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:48:09,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:09,401 INFO L93 Difference]: Finished difference Result 10441 states and 16350 transitions. [2022-11-18 18:48:09,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 18:48:09,401 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-11-18 18:48:09,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:09,417 INFO L225 Difference]: With dead ends: 10441 [2022-11-18 18:48:09,417 INFO L226 Difference]: Without dead ends: 7793 [2022-11-18 18:48:09,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:48:09,425 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 954 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 361 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1842 SdHoareTripleChecker+Invalid, 1650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:09,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1842 Invalid, 1650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 1288 Invalid, 1 Unknown, 0 Unchecked, 6.8s Time] [2022-11-18 18:48:09,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7793 states. [2022-11-18 18:48:10,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7793 to 6847. [2022-11-18 18:48:10,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6847 states, 5810 states have (on average 1.4731497418244406) internal successors, (8559), 6043 states have internal predecessors, (8559), 743 states have call successors, (743), 227 states have call predecessors, (743), 293 states have return successors, (1198), 606 states have call predecessors, (1198), 722 states have call successors, (1198) [2022-11-18 18:48:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6847 states to 6847 states and 10500 transitions. [2022-11-18 18:48:10,107 INFO L78 Accepts]: Start accepts. Automaton has 6847 states and 10500 transitions. Word has length 67 [2022-11-18 18:48:10,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:10,107 INFO L495 AbstractCegarLoop]: Abstraction has 6847 states and 10500 transitions. [2022-11-18 18:48:10,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:48:10,107 INFO L276 IsEmpty]: Start isEmpty. Operand 6847 states and 10500 transitions. [2022-11-18 18:48:10,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 18:48:10,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:10,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:10,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-18 18:48:10,109 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:48:10,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:10,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1466440038, now seen corresponding path program 1 times [2022-11-18 18:48:10,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:10,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191717115] [2022-11-18 18:48:10,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:10,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:10,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:48:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:10,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:48:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:10,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-18 18:48:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:10,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-18 18:48:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:10,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-18 18:48:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:10,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:10,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191717115] [2022-11-18 18:48:10,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191717115] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:10,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:48:10,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:48:10,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173933531] [2022-11-18 18:48:10,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:10,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:48:10,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:10,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:48:10,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:48:10,541 INFO L87 Difference]: Start difference. First operand 6847 states and 10500 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 18:48:15,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:48:20,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:20,096 INFO L93 Difference]: Finished difference Result 9490 states and 14566 transitions. [2022-11-18 18:48:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 18:48:20,104 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-11-18 18:48:20,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:20,115 INFO L225 Difference]: With dead ends: 9490 [2022-11-18 18:48:20,115 INFO L226 Difference]: Without dead ends: 5437 [2022-11-18 18:48:20,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-11-18 18:48:20,123 INFO L413 NwaCegarLoop]: 757 mSDtfsCounter, 2908 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 796 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2968 SdHoareTripleChecker+Valid, 2703 SdHoareTripleChecker+Invalid, 2962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 796 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:20,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2968 Valid, 2703 Invalid, 2962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [796 Valid, 2165 Invalid, 1 Unknown, 0 Unchecked, 8.2s Time] [2022-11-18 18:48:20,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5437 states. [2022-11-18 18:48:20,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5437 to 4456. [2022-11-18 18:48:20,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4456 states, 3785 states have (on average 1.4544253632760897) internal successors, (5505), 3908 states have internal predecessors, (5505), 466 states have call successors, (466), 162 states have call predecessors, (466), 204 states have return successors, (652), 401 states have call predecessors, (652), 449 states have call successors, (652) [2022-11-18 18:48:20,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4456 states to 4456 states and 6623 transitions. [2022-11-18 18:48:20,584 INFO L78 Accepts]: Start accepts. Automaton has 4456 states and 6623 transitions. Word has length 69 [2022-11-18 18:48:20,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:20,584 INFO L495 AbstractCegarLoop]: Abstraction has 4456 states and 6623 transitions. [2022-11-18 18:48:20,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 18:48:20,584 INFO L276 IsEmpty]: Start isEmpty. Operand 4456 states and 6623 transitions. [2022-11-18 18:48:20,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 18:48:20,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:20,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:20,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-18 18:48:20,586 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:48:20,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:20,586 INFO L85 PathProgramCache]: Analyzing trace with hash -677342089, now seen corresponding path program 1 times [2022-11-18 18:48:20,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:20,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957687408] [2022-11-18 18:48:20,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:20,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:20,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:48:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:20,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:48:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:20,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 18:48:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:20,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-18 18:48:20,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:20,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:20,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:20,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957687408] [2022-11-18 18:48:20,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957687408] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:20,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:48:20,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:48:20,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937498946] [2022-11-18 18:48:20,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:20,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:48:20,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:20,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:48:20,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:48:20,963 INFO L87 Difference]: Start difference. First operand 4456 states and 6623 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:48:26,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:48:28,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:48:30,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:30,605 INFO L93 Difference]: Finished difference Result 7882 states and 11879 transitions. [2022-11-18 18:48:30,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 18:48:30,606 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2022-11-18 18:48:30,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:30,617 INFO L225 Difference]: With dead ends: 7882 [2022-11-18 18:48:30,617 INFO L226 Difference]: Without dead ends: 5395 [2022-11-18 18:48:30,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:48:30,623 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 837 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 1694 mSolverCounterSat, 143 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 2133 SdHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1694 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:30,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 2133 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1694 Invalid, 2 Unknown, 0 Unchecked, 8.6s Time] [2022-11-18 18:48:30,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5395 states. [2022-11-18 18:48:31,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5395 to 4432. [2022-11-18 18:48:31,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4432 states, 3761 states have (on average 1.4557298590800318) internal successors, (5475), 3884 states have internal predecessors, (5475), 466 states have call successors, (466), 162 states have call predecessors, (466), 204 states have return successors, (652), 401 states have call predecessors, (652), 449 states have call successors, (652) [2022-11-18 18:48:31,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 6593 transitions. [2022-11-18 18:48:31,143 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 6593 transitions. Word has length 68 [2022-11-18 18:48:31,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:31,144 INFO L495 AbstractCegarLoop]: Abstraction has 4432 states and 6593 transitions. [2022-11-18 18:48:31,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:48:31,144 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 6593 transitions. [2022-11-18 18:48:31,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-18 18:48:31,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:31,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:31,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-18 18:48:31,147 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:48:31,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:31,147 INFO L85 PathProgramCache]: Analyzing trace with hash -554272668, now seen corresponding path program 1 times [2022-11-18 18:48:31,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:31,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579524472] [2022-11-18 18:48:31,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:31,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:31,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:48:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:31,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:48:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:31,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-18 18:48:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:31,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-18 18:48:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:31,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 18:48:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:31,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-18 18:48:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:31,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:31,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579524472] [2022-11-18 18:48:31,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579524472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:31,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:48:31,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:48:31,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737449639] [2022-11-18 18:48:31,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:31,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:48:31,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:31,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:48:31,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:48:31,467 INFO L87 Difference]: Start difference. First operand 4432 states and 6593 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-18 18:48:36,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:48:38,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:38,451 INFO L93 Difference]: Finished difference Result 7928 states and 11993 transitions. [2022-11-18 18:48:38,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 18:48:38,452 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 71 [2022-11-18 18:48:38,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:38,466 INFO L225 Difference]: With dead ends: 7928 [2022-11-18 18:48:38,466 INFO L226 Difference]: Without dead ends: 5377 [2022-11-18 18:48:38,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2022-11-18 18:48:38,471 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 1469 mSDsluCounter, 1585 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 539 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1479 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:38,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1479 Valid, 2092 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 1394 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2022-11-18 18:48:38,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5377 states. [2022-11-18 18:48:38,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5377 to 4423. [2022-11-18 18:48:38,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 3755 states have (on average 1.4561917443408787) internal successors, (5468), 3877 states have internal predecessors, (5468), 464 states have call successors, (464), 161 states have call predecessors, (464), 203 states have return successors, (638), 399 states have call predecessors, (638), 447 states have call successors, (638) [2022-11-18 18:48:38,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 6570 transitions. [2022-11-18 18:48:38,928 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 6570 transitions. Word has length 71 [2022-11-18 18:48:38,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:38,929 INFO L495 AbstractCegarLoop]: Abstraction has 4423 states and 6570 transitions. [2022-11-18 18:48:38,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-18 18:48:38,929 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 6570 transitions. [2022-11-18 18:48:38,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 18:48:38,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:38,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:38,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-18 18:48:38,931 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:48:38,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:38,932 INFO L85 PathProgramCache]: Analyzing trace with hash 827121083, now seen corresponding path program 1 times [2022-11-18 18:48:38,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:38,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109459940] [2022-11-18 18:48:38,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:38,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:39,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:48:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:39,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:48:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:39,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 18:48:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:39,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-18 18:48:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:39,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:39,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:39,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109459940] [2022-11-18 18:48:39,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109459940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:39,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:48:39,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-18 18:48:39,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830918090] [2022-11-18 18:48:39,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:39,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:48:39,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:39,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:48:39,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:48:39,555 INFO L87 Difference]: Start difference. First operand 4423 states and 6570 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:48:42,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:48:46,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:48:48,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:48,050 INFO L93 Difference]: Finished difference Result 5300 states and 8024 transitions. [2022-11-18 18:48:48,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 18:48:48,051 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2022-11-18 18:48:48,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:48,062 INFO L225 Difference]: With dead ends: 5300 [2022-11-18 18:48:48,062 INFO L226 Difference]: Without dead ends: 5280 [2022-11-18 18:48:48,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-18 18:48:48,065 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 993 mSDsluCounter, 2337 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 421 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 2870 SdHoareTripleChecker+Invalid, 2240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:48,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 2870 Invalid, 2240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 1818 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2022-11-18 18:48:48,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5280 states. [2022-11-18 18:48:48,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 4422. [2022-11-18 18:48:48,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4422 states, 3755 states have (on average 1.455925432756325) internal successors, (5467), 3876 states have internal predecessors, (5467), 463 states have call successors, (463), 161 states have call predecessors, (463), 203 states have return successors, (637), 399 states have call predecessors, (637), 446 states have call successors, (637) [2022-11-18 18:48:48,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4422 states to 4422 states and 6567 transitions. [2022-11-18 18:48:48,577 INFO L78 Accepts]: Start accepts. Automaton has 4422 states and 6567 transitions. Word has length 68 [2022-11-18 18:48:48,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:48,577 INFO L495 AbstractCegarLoop]: Abstraction has 4422 states and 6567 transitions. [2022-11-18 18:48:48,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:48:48,578 INFO L276 IsEmpty]: Start isEmpty. Operand 4422 states and 6567 transitions. [2022-11-18 18:48:48,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 18:48:48,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:48,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:48,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-18 18:48:48,580 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:48:48,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:48,581 INFO L85 PathProgramCache]: Analyzing trace with hash 463590116, now seen corresponding path program 1 times [2022-11-18 18:48:48,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:48,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223204193] [2022-11-18 18:48:48,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:48,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:48,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:48:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:48,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:48:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:49,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 18:48:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:49,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-18 18:48:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:49,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:49,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223204193] [2022-11-18 18:48:49,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223204193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:49,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:48:49,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 18:48:49,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745473807] [2022-11-18 18:48:49,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:49,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:48:49,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:49,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:48:49,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:48:49,273 INFO L87 Difference]: Start difference. First operand 4422 states and 6567 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:48:55,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:48:57,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:57,767 INFO L93 Difference]: Finished difference Result 5362 states and 8158 transitions. [2022-11-18 18:48:57,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 18:48:57,768 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-11-18 18:48:57,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:57,778 INFO L225 Difference]: With dead ends: 5362 [2022-11-18 18:48:57,778 INFO L226 Difference]: Without dead ends: 5346 [2022-11-18 18:48:57,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:48:57,781 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 998 mSDsluCounter, 2763 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 430 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 3289 SdHoareTripleChecker+Invalid, 2659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:57,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1021 Valid, 3289 Invalid, 2659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 2228 Invalid, 1 Unknown, 0 Unchecked, 7.3s Time] [2022-11-18 18:48:57,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5346 states. [2022-11-18 18:48:58,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5346 to 4427. [2022-11-18 18:48:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4427 states, 3758 states have (on average 1.456093666844066) internal successors, (5472), 3880 states have internal predecessors, (5472), 465 states have call successors, (465), 161 states have call predecessors, (465), 203 states have return successors, (639), 400 states have call predecessors, (639), 448 states have call successors, (639) [2022-11-18 18:48:58,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4427 states to 4427 states and 6576 transitions. [2022-11-18 18:48:58,258 INFO L78 Accepts]: Start accepts. Automaton has 4427 states and 6576 transitions. Word has length 69 [2022-11-18 18:48:58,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:58,259 INFO L495 AbstractCegarLoop]: Abstraction has 4427 states and 6576 transitions. [2022-11-18 18:48:58,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:48:58,259 INFO L276 IsEmpty]: Start isEmpty. Operand 4427 states and 6576 transitions. [2022-11-18 18:48:58,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 18:48:58,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:58,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:58,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-18 18:48:58,261 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:48:58,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:58,261 INFO L85 PathProgramCache]: Analyzing trace with hash -669900528, now seen corresponding path program 1 times [2022-11-18 18:48:58,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:58,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861073899] [2022-11-18 18:48:58,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:58,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:58,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:48:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:58,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:48:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:58,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 18:48:58,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:58,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 18:48:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:59,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:59,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861073899] [2022-11-18 18:48:59,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861073899] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:59,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:48:59,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 18:48:59,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756810987] [2022-11-18 18:48:59,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:59,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:48:59,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:59,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:48:59,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:48:59,020 INFO L87 Difference]: Start difference. First operand 4427 states and 6576 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 18:49:04,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:49:06,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:49:07,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:07,903 INFO L93 Difference]: Finished difference Result 9525 states and 14480 transitions. [2022-11-18 18:49:07,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:49:07,903 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 69 [2022-11-18 18:49:07,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:07,914 INFO L225 Difference]: With dead ends: 9525 [2022-11-18 18:49:07,914 INFO L226 Difference]: Without dead ends: 5473 [2022-11-18 18:49:07,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:49:07,920 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 405 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 97 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 2523 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:07,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 2523 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1453 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2022-11-18 18:49:07,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2022-11-18 18:49:08,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 4455. [2022-11-18 18:49:08,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4455 states, 3786 states have (on average 1.4527205493924986) internal successors, (5500), 3908 states have internal predecessors, (5500), 465 states have call successors, (465), 161 states have call predecessors, (465), 203 states have return successors, (639), 400 states have call predecessors, (639), 448 states have call successors, (639) [2022-11-18 18:49:08,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4455 states to 4455 states and 6604 transitions. [2022-11-18 18:49:08,399 INFO L78 Accepts]: Start accepts. Automaton has 4455 states and 6604 transitions. Word has length 69 [2022-11-18 18:49:08,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:08,399 INFO L495 AbstractCegarLoop]: Abstraction has 4455 states and 6604 transitions. [2022-11-18 18:49:08,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 18:49:08,400 INFO L276 IsEmpty]: Start isEmpty. Operand 4455 states and 6604 transitions. [2022-11-18 18:49:08,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 18:49:08,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:08,401 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:08,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-18 18:49:08,401 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:49:08,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:08,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1685614928, now seen corresponding path program 1 times [2022-11-18 18:49:08,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:08,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43371023] [2022-11-18 18:49:08,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:08,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:08,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:49:08,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:08,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:49:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:08,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 18:49:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:08,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 18:49:09,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:09,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:09,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43371023] [2022-11-18 18:49:09,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43371023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:49:09,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:49:09,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 18:49:09,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056331322] [2022-11-18 18:49:09,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:49:09,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:49:09,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:09,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:49:09,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:49:09,094 INFO L87 Difference]: Start difference. First operand 4455 states and 6604 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 18:49:14,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:49:15,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:15,863 INFO L93 Difference]: Finished difference Result 9445 states and 14286 transitions. [2022-11-18 18:49:15,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 18:49:15,864 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 69 [2022-11-18 18:49:15,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:15,875 INFO L225 Difference]: With dead ends: 9445 [2022-11-18 18:49:15,875 INFO L226 Difference]: Without dead ends: 5384 [2022-11-18 18:49:15,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:49:15,883 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 570 mSDsluCounter, 2601 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 371 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 3151 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:15,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 3151 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 1678 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2022-11-18 18:49:15,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5384 states. [2022-11-18 18:49:16,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5384 to 4434. [2022-11-18 18:49:16,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4434 states, 3772 states have (on average 1.4544008483563096) internal successors, (5486), 3894 states have internal predecessors, (5486), 465 states have call successors, (465), 161 states have call predecessors, (465), 196 states have return successors, (594), 393 states have call predecessors, (594), 448 states have call successors, (594) [2022-11-18 18:49:16,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4434 states to 4434 states and 6545 transitions. [2022-11-18 18:49:16,437 INFO L78 Accepts]: Start accepts. Automaton has 4434 states and 6545 transitions. Word has length 69 [2022-11-18 18:49:16,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:16,438 INFO L495 AbstractCegarLoop]: Abstraction has 4434 states and 6545 transitions. [2022-11-18 18:49:16,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 18:49:16,438 INFO L276 IsEmpty]: Start isEmpty. Operand 4434 states and 6545 transitions. [2022-11-18 18:49:16,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-18 18:49:16,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:16,439 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:16,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-18 18:49:16,440 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:49:16,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:16,440 INFO L85 PathProgramCache]: Analyzing trace with hash 277949588, now seen corresponding path program 1 times [2022-11-18 18:49:16,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:16,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765927201] [2022-11-18 18:49:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:16,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:16,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:49:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:16,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:49:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:16,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 18:49:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:17,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 18:49:17,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:17,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-18 18:49:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:17,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:17,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765927201] [2022-11-18 18:49:17,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765927201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:49:17,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:49:17,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 18:49:17,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534762453] [2022-11-18 18:49:17,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:49:17,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:49:17,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:17,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:49:17,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:49:17,154 INFO L87 Difference]: Start difference. First operand 4434 states and 6545 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 18:49:25,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:49:27,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:49:29,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:29,710 INFO L93 Difference]: Finished difference Result 8059 states and 12189 transitions. [2022-11-18 18:49:29,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 18:49:29,711 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2022-11-18 18:49:29,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:29,722 INFO L225 Difference]: With dead ends: 8059 [2022-11-18 18:49:29,722 INFO L226 Difference]: Without dead ends: 5579 [2022-11-18 18:49:29,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:49:29,730 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 863 mSDsluCounter, 3644 mSDsCounter, 0 mSdLazyCounter, 3169 mSolverCounterSat, 246 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 4171 SdHoareTripleChecker+Invalid, 3417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 3169 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:29,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [886 Valid, 4171 Invalid, 3417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 3169 Invalid, 2 Unknown, 0 Unchecked, 11.3s Time] [2022-11-18 18:49:29,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5579 states. [2022-11-18 18:49:30,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5579 to 4492. [2022-11-18 18:49:30,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4492 states, 3816 states have (on average 1.44916142557652) internal successors, (5530), 3940 states have internal predecessors, (5530), 465 states have call successors, (465), 161 states have call predecessors, (465), 210 states have return successors, (639), 405 states have call predecessors, (639), 448 states have call successors, (639) [2022-11-18 18:49:30,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4492 states to 4492 states and 6634 transitions. [2022-11-18 18:49:30,319 INFO L78 Accepts]: Start accepts. Automaton has 4492 states and 6634 transitions. Word has length 71 [2022-11-18 18:49:30,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:30,320 INFO L495 AbstractCegarLoop]: Abstraction has 4492 states and 6634 transitions. [2022-11-18 18:49:30,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 18:49:30,320 INFO L276 IsEmpty]: Start isEmpty. Operand 4492 states and 6634 transitions. [2022-11-18 18:49:30,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-18 18:49:30,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:30,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:30,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-18 18:49:30,322 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:49:30,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:30,322 INFO L85 PathProgramCache]: Analyzing trace with hash 302497870, now seen corresponding path program 1 times [2022-11-18 18:49:30,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:30,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654820940] [2022-11-18 18:49:30,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:30,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:30,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:49:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:30,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:49:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:30,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 18:49:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:30,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-18 18:49:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:30,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:30,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654820940] [2022-11-18 18:49:30,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654820940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:49:30,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:49:30,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-18 18:49:30,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564765422] [2022-11-18 18:49:30,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:49:30,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:49:30,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:30,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:49:30,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:49:30,886 INFO L87 Difference]: Start difference. First operand 4492 states and 6634 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 18:49:36,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:49:38,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:49:40,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:40,295 INFO L93 Difference]: Finished difference Result 9698 states and 14628 transitions. [2022-11-18 18:49:40,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 18:49:40,299 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 70 [2022-11-18 18:49:40,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:40,309 INFO L225 Difference]: With dead ends: 9698 [2022-11-18 18:49:40,309 INFO L226 Difference]: Without dead ends: 5600 [2022-11-18 18:49:40,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:49:40,316 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 413 mSDsluCounter, 2316 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 128 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 2859 SdHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:40,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 2859 Invalid, 1924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1794 Invalid, 2 Unknown, 0 Unchecked, 8.3s Time] [2022-11-18 18:49:40,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5600 states. [2022-11-18 18:49:40,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5600 to 4504. [2022-11-18 18:49:40,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4504 states, 3828 states have (on average 1.4477533960292581) internal successors, (5542), 3940 states have internal predecessors, (5542), 465 states have call successors, (465), 161 states have call predecessors, (465), 210 states have return successors, (639), 417 states have call predecessors, (639), 448 states have call successors, (639) [2022-11-18 18:49:40,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4504 states to 4504 states and 6646 transitions. [2022-11-18 18:49:40,814 INFO L78 Accepts]: Start accepts. Automaton has 4504 states and 6646 transitions. Word has length 70 [2022-11-18 18:49:40,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:40,814 INFO L495 AbstractCegarLoop]: Abstraction has 4504 states and 6646 transitions. [2022-11-18 18:49:40,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 18:49:40,814 INFO L276 IsEmpty]: Start isEmpty. Operand 4504 states and 6646 transitions. [2022-11-18 18:49:40,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 18:49:40,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:40,816 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:40,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-18 18:49:40,816 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:49:40,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:40,816 INFO L85 PathProgramCache]: Analyzing trace with hash 965591191, now seen corresponding path program 1 times [2022-11-18 18:49:40,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:40,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181573291] [2022-11-18 18:49:40,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:40,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:41,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:49:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:41,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:49:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:41,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-18 18:49:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:41,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:41,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:41,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181573291] [2022-11-18 18:49:41,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181573291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:49:41,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:49:41,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-18 18:49:41,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265589698] [2022-11-18 18:49:41,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:49:41,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:49:41,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:41,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:49:41,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:49:41,422 INFO L87 Difference]: Start difference. First operand 4504 states and 6646 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 18:49:48,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:49:50,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:50,793 INFO L93 Difference]: Finished difference Result 5384 states and 8102 transitions. [2022-11-18 18:49:50,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 18:49:50,793 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 69 [2022-11-18 18:49:50,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:50,802 INFO L225 Difference]: With dead ends: 5384 [2022-11-18 18:49:50,802 INFO L226 Difference]: Without dead ends: 5362 [2022-11-18 18:49:50,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:49:50,804 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 911 mSDsluCounter, 3519 mSDsCounter, 0 mSdLazyCounter, 2954 mSolverCounterSat, 324 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 4046 SdHoareTripleChecker+Invalid, 3279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 2954 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:50,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [935 Valid, 4046 Invalid, 3279 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [324 Valid, 2954 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2022-11-18 18:49:50,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5362 states. [2022-11-18 18:49:51,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5362 to 4499. [2022-11-18 18:49:51,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4499 states, 3824 states have (on average 1.4479602510460252) internal successors, (5537), 3936 states have internal predecessors, (5537), 464 states have call successors, (464), 161 states have call predecessors, (464), 210 states have return successors, (638), 416 states have call predecessors, (638), 447 states have call successors, (638) [2022-11-18 18:49:51,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4499 states to 4499 states and 6639 transitions. [2022-11-18 18:49:51,395 INFO L78 Accepts]: Start accepts. Automaton has 4499 states and 6639 transitions. Word has length 69 [2022-11-18 18:49:51,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:51,396 INFO L495 AbstractCegarLoop]: Abstraction has 4499 states and 6639 transitions. [2022-11-18 18:49:51,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 18:49:51,396 INFO L276 IsEmpty]: Start isEmpty. Operand 4499 states and 6639 transitions. [2022-11-18 18:49:51,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-18 18:49:51,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:51,398 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 18:49:51,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-18 18:49:51,398 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:49:51,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:51,399 INFO L85 PathProgramCache]: Analyzing trace with hash 2005419428, now seen corresponding path program 1 times [2022-11-18 18:49:51,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:51,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894660204] [2022-11-18 18:49:51,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:51,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:51,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:49:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:51,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:49:51,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:51,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 18:49:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:51,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:49:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:51,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-18 18:49:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:51,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:51,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894660204] [2022-11-18 18:49:51,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894660204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:49:51,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:49:51,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:49:51,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754265523] [2022-11-18 18:49:51,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:49:51,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:49:51,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:51,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:49:51,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:49:51,944 INFO L87 Difference]: Start difference. First operand 4499 states and 6639 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 18:49:56,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:49:59,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:59,333 INFO L93 Difference]: Finished difference Result 9671 states and 14461 transitions. [2022-11-18 18:49:59,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 18:49:59,334 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2022-11-18 18:49:59,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:59,347 INFO L225 Difference]: With dead ends: 9671 [2022-11-18 18:49:59,347 INFO L226 Difference]: Without dead ends: 5575 [2022-11-18 18:49:59,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:49:59,355 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 1016 mSDsluCounter, 1453 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 257 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:59,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1038 Valid, 1972 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1370 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2022-11-18 18:49:59,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5575 states. [2022-11-18 18:49:59,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5575 to 4515. [2022-11-18 18:49:59,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4515 states, 3840 states have (on average 1.44609375) internal successors, (5553), 3952 states have internal predecessors, (5553), 464 states have call successors, (464), 161 states have call predecessors, (464), 210 states have return successors, (638), 416 states have call predecessors, (638), 447 states have call successors, (638) [2022-11-18 18:49:59,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4515 states to 4515 states and 6655 transitions. [2022-11-18 18:49:59,956 INFO L78 Accepts]: Start accepts. Automaton has 4515 states and 6655 transitions. Word has length 71 [2022-11-18 18:49:59,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:59,956 INFO L495 AbstractCegarLoop]: Abstraction has 4515 states and 6655 transitions. [2022-11-18 18:49:59,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 18:49:59,957 INFO L276 IsEmpty]: Start isEmpty. Operand 4515 states and 6655 transitions. [2022-11-18 18:49:59,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 18:49:59,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:59,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:59,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-18 18:49:59,958 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:49:59,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:59,959 INFO L85 PathProgramCache]: Analyzing trace with hash 885604175, now seen corresponding path program 1 times [2022-11-18 18:49:59,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:59,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854544629] [2022-11-18 18:49:59,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:59,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:00,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:50:00,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:00,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:50:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:00,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-18 18:50:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:00,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:00,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854544629] [2022-11-18 18:50:00,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854544629] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:50:00,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:50:00,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-18 18:50:00,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289591144] [2022-11-18 18:50:00,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:50:00,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:50:00,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:00,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:50:00,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:50:00,571 INFO L87 Difference]: Start difference. First operand 4515 states and 6655 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 18:50:07,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:50:10,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:10,346 INFO L93 Difference]: Finished difference Result 5407 states and 8123 transitions. [2022-11-18 18:50:10,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 18:50:10,347 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 69 [2022-11-18 18:50:10,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:10,358 INFO L225 Difference]: With dead ends: 5407 [2022-11-18 18:50:10,358 INFO L226 Difference]: Without dead ends: 5386 [2022-11-18 18:50:10,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:50:10,362 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 910 mSDsluCounter, 3479 mSDsCounter, 0 mSdLazyCounter, 2947 mSolverCounterSat, 318 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 4001 SdHoareTripleChecker+Invalid, 3266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 2947 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:10,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [934 Valid, 4001 Invalid, 3266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 2947 Invalid, 1 Unknown, 0 Unchecked, 8.3s Time] [2022-11-18 18:50:10,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5386 states. [2022-11-18 18:50:10,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5386 to 4511. [2022-11-18 18:50:11,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4511 states, 3837 states have (on average 1.4461819129528277) internal successors, (5549), 3949 states have internal predecessors, (5549), 463 states have call successors, (463), 161 states have call predecessors, (463), 210 states have return successors, (637), 415 states have call predecessors, (637), 446 states have call successors, (637) [2022-11-18 18:50:11,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4511 states to 4511 states and 6649 transitions. [2022-11-18 18:50:11,013 INFO L78 Accepts]: Start accepts. Automaton has 4511 states and 6649 transitions. Word has length 69 [2022-11-18 18:50:11,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:11,014 INFO L495 AbstractCegarLoop]: Abstraction has 4511 states and 6649 transitions. [2022-11-18 18:50:11,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 18:50:11,014 INFO L276 IsEmpty]: Start isEmpty. Operand 4511 states and 6649 transitions. [2022-11-18 18:50:11,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-18 18:50:11,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:11,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:11,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-11-18 18:50:11,016 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:50:11,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:11,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1081372361, now seen corresponding path program 1 times [2022-11-18 18:50:11,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:11,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191866523] [2022-11-18 18:50:11,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:11,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:11,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:11,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:50:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:11,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:50:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:11,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 18:50:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:11,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-18 18:50:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:11,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:11,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191866523] [2022-11-18 18:50:11,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191866523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:50:11,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:50:11,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:50:11,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010631109] [2022-11-18 18:50:11,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:50:11,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:50:11,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:11,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:50:11,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:50:11,359 INFO L87 Difference]: Start difference. First operand 4511 states and 6649 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:50:16,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:50:18,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:50:21,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:21,207 INFO L93 Difference]: Finished difference Result 8174 states and 12226 transitions. [2022-11-18 18:50:21,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 18:50:21,208 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2022-11-18 18:50:21,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:21,221 INFO L225 Difference]: With dead ends: 8174 [2022-11-18 18:50:21,221 INFO L226 Difference]: Without dead ends: 5647 [2022-11-18 18:50:21,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:50:21,227 INFO L413 NwaCegarLoop]: 500 mSDtfsCounter, 856 mSDsluCounter, 1525 mSDsCounter, 0 mSdLazyCounter, 1650 mSolverCounterSat, 159 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 2025 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1650 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:21,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [879 Valid, 2025 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1650 Invalid, 2 Unknown, 0 Unchecked, 8.5s Time] [2022-11-18 18:50:21,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5647 states. [2022-11-18 18:50:22,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5647 to 4571. [2022-11-18 18:50:22,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4571 states, 3897 states have (on average 1.4393122915062868) internal successors, (5609), 4009 states have internal predecessors, (5609), 463 states have call successors, (463), 161 states have call predecessors, (463), 210 states have return successors, (637), 415 states have call predecessors, (637), 446 states have call successors, (637) [2022-11-18 18:50:22,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4571 states to 4571 states and 6709 transitions. [2022-11-18 18:50:22,126 INFO L78 Accepts]: Start accepts. Automaton has 4571 states and 6709 transitions. Word has length 71 [2022-11-18 18:50:22,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:22,126 INFO L495 AbstractCegarLoop]: Abstraction has 4571 states and 6709 transitions. [2022-11-18 18:50:22,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:50:22,126 INFO L276 IsEmpty]: Start isEmpty. Operand 4571 states and 6709 transitions. [2022-11-18 18:50:22,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-18 18:50:22,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:22,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:22,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-11-18 18:50:22,129 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:50:22,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:22,129 INFO L85 PathProgramCache]: Analyzing trace with hash -100745951, now seen corresponding path program 1 times [2022-11-18 18:50:22,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:22,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893145084] [2022-11-18 18:50:22,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:22,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:22,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:50:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:22,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:50:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:22,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-18 18:50:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:22,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:22,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893145084] [2022-11-18 18:50:22,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893145084] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:50:22,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:50:22,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-18 18:50:22,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823370393] [2022-11-18 18:50:22,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:50:22,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:50:22,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:22,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:50:22,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:50:22,613 INFO L87 Difference]: Start difference. First operand 4571 states and 6709 transitions. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 18:50:28,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:50:31,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:31,369 INFO L93 Difference]: Finished difference Result 5463 states and 8177 transitions. [2022-11-18 18:50:31,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 18:50:31,370 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 70 [2022-11-18 18:50:31,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:31,381 INFO L225 Difference]: With dead ends: 5463 [2022-11-18 18:50:31,381 INFO L226 Difference]: Without dead ends: 5442 [2022-11-18 18:50:31,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:50:31,384 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 910 mSDsluCounter, 3440 mSDsCounter, 0 mSdLazyCounter, 2935 mSolverCounterSat, 315 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 3956 SdHoareTripleChecker+Invalid, 3251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 2935 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:31,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [934 Valid, 3956 Invalid, 3251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 2935 Invalid, 1 Unknown, 0 Unchecked, 7.4s Time] [2022-11-18 18:50:31,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5442 states. [2022-11-18 18:50:31,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5442 to 4567. [2022-11-18 18:50:31,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4567 states, 3894 states have (on average 1.4393939393939394) internal successors, (5605), 4006 states have internal predecessors, (5605), 462 states have call successors, (462), 161 states have call predecessors, (462), 210 states have return successors, (636), 414 states have call predecessors, (636), 445 states have call successors, (636) [2022-11-18 18:50:31,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4567 states to 4567 states and 6703 transitions. [2022-11-18 18:50:32,000 INFO L78 Accepts]: Start accepts. Automaton has 4567 states and 6703 transitions. Word has length 70 [2022-11-18 18:50:32,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:32,000 INFO L495 AbstractCegarLoop]: Abstraction has 4567 states and 6703 transitions. [2022-11-18 18:50:32,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 18:50:32,000 INFO L276 IsEmpty]: Start isEmpty. Operand 4567 states and 6703 transitions. [2022-11-18 18:50:32,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-18 18:50:32,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:32,002 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 18:50:32,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-11-18 18:50:32,002 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:50:32,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:32,002 INFO L85 PathProgramCache]: Analyzing trace with hash 2023695595, now seen corresponding path program 1 times [2022-11-18 18:50:32,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:32,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503018917] [2022-11-18 18:50:32,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:32,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:32,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:50:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:32,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:50:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:32,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 18:50:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:32,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:50:32,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:32,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-18 18:50:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:32,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:32,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:32,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503018917] [2022-11-18 18:50:32,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503018917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:50:32,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:50:32,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 18:50:32,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459290165] [2022-11-18 18:50:32,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:50:32,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:50:32,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:32,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:50:32,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:50:32,917 INFO L87 Difference]: Start difference. First operand 4567 states and 6703 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 18:50:39,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:50:40,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:40,583 INFO L93 Difference]: Finished difference Result 5020 states and 7305 transitions. [2022-11-18 18:50:40,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 18:50:40,584 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 72 [2022-11-18 18:50:40,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:40,587 INFO L225 Difference]: With dead ends: 5020 [2022-11-18 18:50:40,587 INFO L226 Difference]: Without dead ends: 766 [2022-11-18 18:50:40,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:50:40,594 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 590 mSDsluCounter, 1628 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 86 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 2038 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:40,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 2038 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1549 Invalid, 1 Unknown, 0 Unchecked, 7.1s Time] [2022-11-18 18:50:40,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-11-18 18:50:40,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 733. [2022-11-18 18:50:40,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 624 states have (on average 1.3060897435897436) internal successors, (815), 636 states have internal predecessors, (815), 67 states have call successors, (67), 35 states have call predecessors, (67), 41 states have return successors, (84), 64 states have call predecessors, (84), 60 states have call successors, (84) [2022-11-18 18:50:40,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 966 transitions. [2022-11-18 18:50:40,691 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 966 transitions. Word has length 72 [2022-11-18 18:50:40,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:40,691 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 966 transitions. [2022-11-18 18:50:40,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 18:50:40,692 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 966 transitions. [2022-11-18 18:50:40,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-18 18:50:40,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:40,694 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 18:50:40,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-18 18:50:40,694 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:50:40,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:40,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1623584585, now seen corresponding path program 1 times [2022-11-18 18:50:40,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:40,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587612605] [2022-11-18 18:50:40,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:40,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:41,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:50:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:41,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:50:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:41,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 18:50:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:41,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 18:50:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:41,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:50:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:41,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 18:50:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:41,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-18 18:50:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:41,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 18:50:41,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:41,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587612605] [2022-11-18 18:50:41,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587612605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:50:41,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:50:41,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-18 18:50:41,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539277983] [2022-11-18 18:50:41,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:50:41,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 18:50:41,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:41,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 18:50:41,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:50:41,767 INFO L87 Difference]: Start difference. First operand 733 states and 966 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-18 18:50:49,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:50:50,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:50,625 INFO L93 Difference]: Finished difference Result 777 states and 1025 transitions. [2022-11-18 18:50:50,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 18:50:50,626 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 75 [2022-11-18 18:50:50,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:50,628 INFO L225 Difference]: With dead ends: 777 [2022-11-18 18:50:50,628 INFO L226 Difference]: Without dead ends: 739 [2022-11-18 18:50:50,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:50:50,629 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 453 mSDsluCounter, 3055 mSDsCounter, 0 mSdLazyCounter, 2490 mSolverCounterSat, 125 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 3452 SdHoareTripleChecker+Invalid, 2616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2490 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:50,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 3452 Invalid, 2616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2490 Invalid, 1 Unknown, 0 Unchecked, 8.4s Time] [2022-11-18 18:50:50,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-11-18 18:50:50,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 713. [2022-11-18 18:50:50,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 610 states have (on average 1.3081967213114754) internal successors, (798), 622 states have internal predecessors, (798), 63 states have call successors, (63), 33 states have call predecessors, (63), 39 states have return successors, (80), 60 states have call predecessors, (80), 56 states have call successors, (80) [2022-11-18 18:50:50,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 941 transitions. [2022-11-18 18:50:50,728 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 941 transitions. Word has length 75 [2022-11-18 18:50:50,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:50,728 INFO L495 AbstractCegarLoop]: Abstraction has 713 states and 941 transitions. [2022-11-18 18:50:50,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-18 18:50:50,728 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 941 transitions. [2022-11-18 18:50:50,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-18 18:50:50,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:50,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:50,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-11-18 18:50:50,729 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:50:50,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:50,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1736062830, now seen corresponding path program 1 times [2022-11-18 18:50:50,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:50,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79908166] [2022-11-18 18:50:50,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:50,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:51,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:50:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:51,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:50:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:51,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 18:50:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:51,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:50:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:51,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 18:50:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:51,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-18 18:50:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:51,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:51,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:51,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79908166] [2022-11-18 18:50:51,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79908166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:50:51,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:50:51,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 18:50:51,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267711897] [2022-11-18 18:50:51,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:50:51,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:50:51,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:51,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:50:51,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:50:51,540 INFO L87 Difference]: Start difference. First operand 713 states and 941 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 18:50:57,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:50:58,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:58,419 INFO L93 Difference]: Finished difference Result 759 states and 1003 transitions. [2022-11-18 18:50:58,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 18:50:58,419 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 75 [2022-11-18 18:50:58,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:58,421 INFO L225 Difference]: With dead ends: 759 [2022-11-18 18:50:58,421 INFO L226 Difference]: Without dead ends: 713 [2022-11-18 18:50:58,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:50:58,422 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 665 mSDsluCounter, 2088 mSDsCounter, 0 mSdLazyCounter, 1544 mSolverCounterSat, 223 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 2488 SdHoareTripleChecker+Invalid, 1768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1544 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:58,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 2488 Invalid, 1768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1544 Invalid, 1 Unknown, 0 Unchecked, 6.5s Time] [2022-11-18 18:50:58,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-11-18 18:50:58,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 691. [2022-11-18 18:50:58,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 592 states have (on average 1.3108108108108107) internal successors, (776), 604 states have internal predecessors, (776), 59 states have call successors, (59), 33 states have call predecessors, (59), 39 states have return successors, (76), 56 states have call predecessors, (76), 52 states have call successors, (76) [2022-11-18 18:50:58,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 911 transitions. [2022-11-18 18:50:58,502 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 911 transitions. Word has length 75 [2022-11-18 18:50:58,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:58,502 INFO L495 AbstractCegarLoop]: Abstraction has 691 states and 911 transitions. [2022-11-18 18:50:58,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 18:50:58,503 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 911 transitions. [2022-11-18 18:50:58,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-18 18:50:58,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:58,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:58,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-11-18 18:50:58,504 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:50:58,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:58,504 INFO L85 PathProgramCache]: Analyzing trace with hash -496016635, now seen corresponding path program 1 times [2022-11-18 18:50:58,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:58,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666175707] [2022-11-18 18:50:58,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:58,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:58,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:50:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:58,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:50:58,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:58,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-18 18:50:58,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:58,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-18 18:50:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:58,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-18 18:50:58,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:59,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:50:59,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:59,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:59,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666175707] [2022-11-18 18:50:59,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666175707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:50:59,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:50:59,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-18 18:50:59,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642982390] [2022-11-18 18:50:59,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:50:59,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:50:59,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:59,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:50:59,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:50:59,081 INFO L87 Difference]: Start difference. First operand 691 states and 911 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-18 18:51:03,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:51:04,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:51:04,539 INFO L93 Difference]: Finished difference Result 979 states and 1303 transitions. [2022-11-18 18:51:04,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 18:51:04,539 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 76 [2022-11-18 18:51:04,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:51:04,544 INFO L225 Difference]: With dead ends: 979 [2022-11-18 18:51:04,544 INFO L226 Difference]: Without dead ends: 634 [2022-11-18 18:51:04,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:51:04,545 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 801 mSDsluCounter, 2349 mSDsCounter, 0 mSdLazyCounter, 1587 mSolverCounterSat, 208 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 2719 SdHoareTripleChecker+Invalid, 1796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1587 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:51:04,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 2719 Invalid, 1796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1587 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2022-11-18 18:51:04,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-11-18 18:51:04,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 613. [2022-11-18 18:51:04,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 521 states have (on average 1.2975047984644914) internal successors, (676), 531 states have internal predecessors, (676), 56 states have call successors, (56), 31 states have call predecessors, (56), 35 states have return successors, (72), 53 states have call predecessors, (72), 50 states have call successors, (72) [2022-11-18 18:51:04,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 804 transitions. [2022-11-18 18:51:04,617 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 804 transitions. Word has length 76 [2022-11-18 18:51:04,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:51:04,618 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 804 transitions. [2022-11-18 18:51:04,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-18 18:51:04,618 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 804 transitions. [2022-11-18 18:51:04,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-18 18:51:04,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:51:04,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:51:04,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-11-18 18:51:04,619 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:51:04,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:51:04,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1257721170, now seen corresponding path program 1 times [2022-11-18 18:51:04,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:51:04,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867042407] [2022-11-18 18:51:04,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:51:04,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:51:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:04,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:51:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:04,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:51:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:04,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 18:51:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:04,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 18:51:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:04,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:51:04,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867042407] [2022-11-18 18:51:04,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867042407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:51:04,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:51:04,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:51:04,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192432308] [2022-11-18 18:51:04,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:51:04,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:51:04,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:51:04,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:51:04,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:51:04,967 INFO L87 Difference]: Start difference. First operand 613 states and 804 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:51:08,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:51:09,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:51:09,110 INFO L93 Difference]: Finished difference Result 680 states and 891 transitions. [2022-11-18 18:51:09,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 18:51:09,111 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 74 [2022-11-18 18:51:09,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:51:09,113 INFO L225 Difference]: With dead ends: 680 [2022-11-18 18:51:09,113 INFO L226 Difference]: Without dead ends: 655 [2022-11-18 18:51:09,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:51:09,114 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 600 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 215 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:51:09,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 1288 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 804 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-11-18 18:51:09,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-11-18 18:51:09,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 613. [2022-11-18 18:51:09,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 521 states have (on average 1.3032629558541267) internal successors, (679), 531 states have internal predecessors, (679), 56 states have call successors, (56), 31 states have call predecessors, (56), 35 states have return successors, (72), 53 states have call predecessors, (72), 50 states have call successors, (72) [2022-11-18 18:51:09,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 807 transitions. [2022-11-18 18:51:09,182 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 807 transitions. Word has length 74 [2022-11-18 18:51:09,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:51:09,182 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 807 transitions. [2022-11-18 18:51:09,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:51:09,182 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 807 transitions. [2022-11-18 18:51:09,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-18 18:51:09,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:51:09,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:51:09,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-11-18 18:51:09,184 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:51:09,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:51:09,184 INFO L85 PathProgramCache]: Analyzing trace with hash -280765008, now seen corresponding path program 1 times [2022-11-18 18:51:09,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:51:09,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110790661] [2022-11-18 18:51:09,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:51:09,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:51:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:09,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:51:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:09,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:51:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:09,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 18:51:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:09,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:51:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:09,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:51:09,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110790661] [2022-11-18 18:51:09,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110790661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:51:09,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:51:09,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 18:51:09,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996191783] [2022-11-18 18:51:09,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:51:09,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:51:09,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:51:09,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:51:09,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:51:09,808 INFO L87 Difference]: Start difference. First operand 613 states and 807 transitions. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 18:51:15,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:51:17,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:51:18,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:51:18,283 INFO L93 Difference]: Finished difference Result 648 states and 853 transitions. [2022-11-18 18:51:18,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 18:51:18,284 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 74 [2022-11-18 18:51:18,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:51:18,286 INFO L225 Difference]: With dead ends: 648 [2022-11-18 18:51:18,286 INFO L226 Difference]: Without dead ends: 628 [2022-11-18 18:51:18,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:51:18,287 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 436 mSDsluCounter, 2788 mSDsCounter, 0 mSdLazyCounter, 2184 mSolverCounterSat, 67 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 3167 SdHoareTripleChecker+Invalid, 2253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2184 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:51:18,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 3167 Invalid, 2253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2184 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2022-11-18 18:51:18,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-11-18 18:51:18,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 606. [2022-11-18 18:51:18,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 516 states have (on average 1.302325581395349) internal successors, (672), 526 states have internal predecessors, (672), 55 states have call successors, (55), 31 states have call predecessors, (55), 34 states have return successors, (70), 51 states have call predecessors, (70), 49 states have call successors, (70) [2022-11-18 18:51:18,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 797 transitions. [2022-11-18 18:51:18,363 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 797 transitions. Word has length 74 [2022-11-18 18:51:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:51:18,363 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 797 transitions. [2022-11-18 18:51:18,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 18:51:18,364 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 797 transitions. [2022-11-18 18:51:18,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-18 18:51:18,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:51:18,365 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:51:18,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-11-18 18:51:18,365 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:51:18,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:51:18,366 INFO L85 PathProgramCache]: Analyzing trace with hash 480971669, now seen corresponding path program 1 times [2022-11-18 18:51:18,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:51:18,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531890139] [2022-11-18 18:51:18,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:51:18,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:51:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:18,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:51:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:18,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:51:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:18,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 18:51:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:18,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 18:51:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:18,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:18,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:51:18,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531890139] [2022-11-18 18:51:18,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531890139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:51:18,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:51:18,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:51:18,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99443445] [2022-11-18 18:51:18,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:51:18,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:51:18,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:51:18,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:51:18,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:51:18,709 INFO L87 Difference]: Start difference. First operand 606 states and 797 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:51:22,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:51:23,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:51:23,056 INFO L93 Difference]: Finished difference Result 670 states and 878 transitions. [2022-11-18 18:51:23,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 18:51:23,057 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 74 [2022-11-18 18:51:23,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:51:23,059 INFO L225 Difference]: With dead ends: 670 [2022-11-18 18:51:23,059 INFO L226 Difference]: Without dead ends: 645 [2022-11-18 18:51:23,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:51:23,060 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 541 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 162 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:51:23,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 1300 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 817 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-11-18 18:51:23,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-11-18 18:51:23,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 606. [2022-11-18 18:51:23,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 516 states have (on average 1.302325581395349) internal successors, (672), 526 states have internal predecessors, (672), 55 states have call successors, (55), 31 states have call predecessors, (55), 34 states have return successors, (70), 51 states have call predecessors, (70), 49 states have call successors, (70) [2022-11-18 18:51:23,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 797 transitions. [2022-11-18 18:51:23,137 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 797 transitions. Word has length 74 [2022-11-18 18:51:23,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:51:23,137 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 797 transitions. [2022-11-18 18:51:23,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:51:23,138 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 797 transitions. [2022-11-18 18:51:23,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-18 18:51:23,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:51:23,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:51:23,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-11-18 18:51:23,140 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:51:23,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:51:23,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1282723427, now seen corresponding path program 1 times [2022-11-18 18:51:23,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:51:23,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497858311] [2022-11-18 18:51:23,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:51:23,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:51:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:23,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:51:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:23,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:51:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:23,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 18:51:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:23,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 18:51:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:23,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 18:51:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:23,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:51:23,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497858311] [2022-11-18 18:51:23,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497858311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:51:23,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:51:23,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-18 18:51:23,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049825964] [2022-11-18 18:51:23,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:51:23,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:51:23,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:51:23,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:51:23,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:51:23,841 INFO L87 Difference]: Start difference. First operand 606 states and 797 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 18:51:29,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:51:31,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:51:31,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:51:31,764 INFO L93 Difference]: Finished difference Result 651 states and 854 transitions. [2022-11-18 18:51:31,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 18:51:31,765 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 77 [2022-11-18 18:51:31,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:51:31,766 INFO L225 Difference]: With dead ends: 651 [2022-11-18 18:51:31,766 INFO L226 Difference]: Without dead ends: 567 [2022-11-18 18:51:31,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:51:31,767 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 468 mSDsluCounter, 2023 mSDsCounter, 0 mSdLazyCounter, 1726 mSolverCounterSat, 75 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 2375 SdHoareTripleChecker+Invalid, 1803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1726 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:51:31,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 2375 Invalid, 1803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1726 Invalid, 2 Unknown, 0 Unchecked, 7.6s Time] [2022-11-18 18:51:31,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-11-18 18:51:31,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 545. [2022-11-18 18:51:31,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 456 states have (on average 1.2478070175438596) internal successors, (569), 468 states have internal predecessors, (569), 54 states have call successors, (54), 31 states have call predecessors, (54), 34 states have return successors, (67), 48 states have call predecessors, (67), 48 states have call successors, (67) [2022-11-18 18:51:31,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 690 transitions. [2022-11-18 18:51:31,837 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 690 transitions. Word has length 77 [2022-11-18 18:51:31,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:51:31,837 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 690 transitions. [2022-11-18 18:51:31,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 18:51:31,837 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 690 transitions. [2022-11-18 18:51:31,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-18 18:51:31,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:51:31,838 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:51:31,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-11-18 18:51:31,838 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:51:31,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:51:31,839 INFO L85 PathProgramCache]: Analyzing trace with hash 947563230, now seen corresponding path program 1 times [2022-11-18 18:51:31,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:51:31,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247236561] [2022-11-18 18:51:31,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:51:31,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:51:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:32,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:51:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:32,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:51:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:32,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-18 18:51:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:32,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-18 18:51:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:32,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-18 18:51:32,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:32,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:51:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:32,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:51:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:32,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:51:32,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247236561] [2022-11-18 18:51:32,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247236561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:51:32,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:51:32,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 18:51:32,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022392540] [2022-11-18 18:51:32,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:51:32,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:51:32,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:51:32,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:51:32,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:51:32,329 INFO L87 Difference]: Start difference. First operand 545 states and 690 transitions. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (9), 7 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-18 18:51:36,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:51:37,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:51:37,122 INFO L93 Difference]: Finished difference Result 832 states and 1076 transitions. [2022-11-18 18:51:37,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 18:51:37,123 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (9), 7 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 80 [2022-11-18 18:51:37,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:51:37,128 INFO L225 Difference]: With dead ends: 832 [2022-11-18 18:51:37,128 INFO L226 Difference]: Without dead ends: 565 [2022-11-18 18:51:37,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2022-11-18 18:51:37,129 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 833 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 195 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:51:37,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [859 Valid, 1628 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1107 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-11-18 18:51:37,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-11-18 18:51:37,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 545. [2022-11-18 18:51:37,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 456 states have (on average 1.2456140350877194) internal successors, (568), 468 states have internal predecessors, (568), 54 states have call successors, (54), 31 states have call predecessors, (54), 34 states have return successors, (67), 48 states have call predecessors, (67), 48 states have call successors, (67) [2022-11-18 18:51:37,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 689 transitions. [2022-11-18 18:51:37,236 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 689 transitions. Word has length 80 [2022-11-18 18:51:37,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:51:37,236 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 689 transitions. [2022-11-18 18:51:37,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (9), 7 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-18 18:51:37,236 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 689 transitions. [2022-11-18 18:51:37,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-18 18:51:37,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:51:37,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:51:37,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-11-18 18:51:37,238 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:51:37,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:51:37,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1912417017, now seen corresponding path program 1 times [2022-11-18 18:51:37,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:51:37,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740687536] [2022-11-18 18:51:37,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:51:37,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:51:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:37,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:51:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:37,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:51:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:37,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-18 18:51:37,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:37,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-18 18:51:37,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:37,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-18 18:51:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:37,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:51:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:37,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:51:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:37,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:51:37,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740687536] [2022-11-18 18:51:37,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740687536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:51:37,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:51:37,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 18:51:37,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412228115] [2022-11-18 18:51:37,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:51:37,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:51:37,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:51:37,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:51:37,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:51:37,627 INFO L87 Difference]: Start difference. First operand 545 states and 689 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (9), 7 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-18 18:51:41,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:51:41,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:51:41,834 INFO L93 Difference]: Finished difference Result 844 states and 1091 transitions. [2022-11-18 18:51:41,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 18:51:41,835 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (9), 7 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 82 [2022-11-18 18:51:41,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:51:41,839 INFO L225 Difference]: With dead ends: 844 [2022-11-18 18:51:41,840 INFO L226 Difference]: Without dead ends: 577 [2022-11-18 18:51:41,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:51:41,841 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 439 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 149 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:51:41,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 1481 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 783 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2022-11-18 18:51:41,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-11-18 18:51:41,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 548. [2022-11-18 18:51:41,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 459 states have (on average 1.2440087145969498) internal successors, (571), 471 states have internal predecessors, (571), 54 states have call successors, (54), 31 states have call predecessors, (54), 34 states have return successors, (67), 48 states have call predecessors, (67), 48 states have call successors, (67) [2022-11-18 18:51:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 692 transitions. [2022-11-18 18:51:41,912 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 692 transitions. Word has length 82 [2022-11-18 18:51:41,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:51:41,912 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 692 transitions. [2022-11-18 18:51:41,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (9), 7 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-18 18:51:41,913 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 692 transitions. [2022-11-18 18:51:41,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-18 18:51:41,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:51:41,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:51:41,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-11-18 18:51:41,915 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:51:41,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:51:41,915 INFO L85 PathProgramCache]: Analyzing trace with hash 900956810, now seen corresponding path program 1 times [2022-11-18 18:51:41,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:51:41,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730942040] [2022-11-18 18:51:41,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:51:41,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:51:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:42,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:51:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:42,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:51:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:42,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 18:51:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:42,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-18 18:51:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:42,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:51:42,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730942040] [2022-11-18 18:51:42,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730942040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:51:42,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:51:42,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 18:51:42,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101950008] [2022-11-18 18:51:42,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:51:42,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:51:42,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:51:42,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:51:42,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:51:42,556 INFO L87 Difference]: Start difference. First operand 548 states and 692 transitions. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 18:51:46,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:51:48,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:51:49,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:51:49,246 INFO L93 Difference]: Finished difference Result 614 states and 775 transitions. [2022-11-18 18:51:49,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 18:51:49,247 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 79 [2022-11-18 18:51:49,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:51:49,249 INFO L225 Difference]: With dead ends: 614 [2022-11-18 18:51:49,249 INFO L226 Difference]: Without dead ends: 562 [2022-11-18 18:51:49,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:51:49,250 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 186 mSDsluCounter, 1788 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 91 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 2126 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:51:49,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 2126 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1134 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2022-11-18 18:51:49,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-11-18 18:51:49,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 540. [2022-11-18 18:51:49,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 453 states have (on average 1.2428256070640176) internal successors, (563), 464 states have internal predecessors, (563), 53 states have call successors, (53), 31 states have call predecessors, (53), 33 states have return successors, (65), 47 states have call predecessors, (65), 47 states have call successors, (65) [2022-11-18 18:51:49,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 681 transitions. [2022-11-18 18:51:49,326 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 681 transitions. Word has length 79 [2022-11-18 18:51:49,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:51:49,326 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 681 transitions. [2022-11-18 18:51:49,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 18:51:49,327 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 681 transitions. [2022-11-18 18:51:49,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-18 18:51:49,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:51:49,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:51:49,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-11-18 18:51:49,328 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:51:49,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:51:49,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1500515065, now seen corresponding path program 1 times [2022-11-18 18:51:49,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:51:49,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341734502] [2022-11-18 18:51:49,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:51:49,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:51:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:49,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:51:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:49,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:51:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:49,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-18 18:51:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:49,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-18 18:51:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:49,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-18 18:51:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:49,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:51:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:49,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:51:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:49,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:51:49,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341734502] [2022-11-18 18:51:49,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341734502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:51:49,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:51:49,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 18:51:49,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051222211] [2022-11-18 18:51:49,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:51:49,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:51:49,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:51:49,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:51:49,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:51:49,680 INFO L87 Difference]: Start difference. First operand 540 states and 681 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 8 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-18 18:51:53,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:51:54,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:51:54,197 INFO L93 Difference]: Finished difference Result 965 states and 1237 transitions. [2022-11-18 18:51:54,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 18:51:54,197 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 8 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 83 [2022-11-18 18:51:54,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:51:54,202 INFO L225 Difference]: With dead ends: 965 [2022-11-18 18:51:54,202 INFO L226 Difference]: Without dead ends: 701 [2022-11-18 18:51:54,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:51:54,203 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 925 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 313 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:51:54,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [934 Valid, 1338 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 809 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2022-11-18 18:51:54,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-11-18 18:51:54,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 660. [2022-11-18 18:51:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 553 states have (on average 1.240506329113924) internal successors, (686), 566 states have internal predecessors, (686), 63 states have call successors, (63), 37 states have call predecessors, (63), 43 states have return successors, (85), 60 states have call predecessors, (85), 58 states have call successors, (85) [2022-11-18 18:51:54,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 834 transitions. [2022-11-18 18:51:54,285 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 834 transitions. Word has length 83 [2022-11-18 18:51:54,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:51:54,286 INFO L495 AbstractCegarLoop]: Abstraction has 660 states and 834 transitions. [2022-11-18 18:51:54,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 8 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-18 18:51:54,286 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 834 transitions. [2022-11-18 18:51:54,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-18 18:51:54,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:51:54,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:51:54,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-11-18 18:51:54,288 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:51:54,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:51:54,288 INFO L85 PathProgramCache]: Analyzing trace with hash 868554885, now seen corresponding path program 1 times [2022-11-18 18:51:54,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:51:54,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401093672] [2022-11-18 18:51:54,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:51:54,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:51:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:54,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:51:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:54,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:51:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:54,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 18:51:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:54,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 18:51:54,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:54,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-18 18:51:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:54,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:51:54,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401093672] [2022-11-18 18:51:54,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401093672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:51:54,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:51:54,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 18:51:54,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543112597] [2022-11-18 18:51:54,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:51:54,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:51:54,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:51:54,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:51:54,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:51:54,871 INFO L87 Difference]: Start difference. First operand 660 states and 834 transitions. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 18:52:00,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:52:00,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:52:00,746 INFO L93 Difference]: Finished difference Result 697 states and 883 transitions. [2022-11-18 18:52:00,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 18:52:00,751 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 86 [2022-11-18 18:52:00,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:52:00,753 INFO L225 Difference]: With dead ends: 697 [2022-11-18 18:52:00,754 INFO L226 Difference]: Without dead ends: 645 [2022-11-18 18:52:00,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:52:00,755 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 446 mSDsluCounter, 1998 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 176 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 2294 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:52:00,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 2294 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1620 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2022-11-18 18:52:00,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-11-18 18:52:00,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 625. [2022-11-18 18:52:00,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 525 states have (on average 1.243809523809524) internal successors, (653), 538 states have internal predecessors, (653), 59 states have call successors, (59), 34 states have call predecessors, (59), 40 states have return successors, (81), 56 states have call predecessors, (81), 54 states have call successors, (81) [2022-11-18 18:52:00,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 793 transitions. [2022-11-18 18:52:00,843 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 793 transitions. Word has length 86 [2022-11-18 18:52:00,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:52:00,843 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 793 transitions. [2022-11-18 18:52:00,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 18:52:00,844 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 793 transitions. [2022-11-18 18:52:00,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-18 18:52:00,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:52:00,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:52:00,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-11-18 18:52:00,846 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:52:00,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:52:00,846 INFO L85 PathProgramCache]: Analyzing trace with hash 773093388, now seen corresponding path program 1 times [2022-11-18 18:52:00,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:52:00,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886121576] [2022-11-18 18:52:00,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:52:00,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:52:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:01,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:52:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:01,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:52:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:01,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 18:52:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:01,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-18 18:52:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:01,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-18 18:52:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:01,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:52:01,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886121576] [2022-11-18 18:52:01,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886121576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:52:01,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:52:01,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 18:52:01,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336589805] [2022-11-18 18:52:01,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:52:01,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:52:01,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:52:01,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:52:01,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:52:01,404 INFO L87 Difference]: Start difference. First operand 625 states and 793 transitions. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-18 18:52:05,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:52:07,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:52:08,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:52:08,596 INFO L93 Difference]: Finished difference Result 1142 states and 1426 transitions. [2022-11-18 18:52:08,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 18:52:08,596 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 86 [2022-11-18 18:52:08,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:52:08,602 INFO L225 Difference]: With dead ends: 1142 [2022-11-18 18:52:08,602 INFO L226 Difference]: Without dead ends: 805 [2022-11-18 18:52:08,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:52:08,603 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 1151 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 274 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1170 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:52:08,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1170 Valid, 1694 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1068 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2022-11-18 18:52:08,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-11-18 18:52:08,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 768. [2022-11-18 18:52:08,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 648 states have (on average 1.2376543209876543) internal successors, (802), 663 states have internal predecessors, (802), 64 states have call successors, (64), 46 states have call predecessors, (64), 55 states have return successors, (85), 63 states have call predecessors, (85), 59 states have call successors, (85) [2022-11-18 18:52:08,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 951 transitions. [2022-11-18 18:52:08,719 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 951 transitions. Word has length 86 [2022-11-18 18:52:08,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:52:08,720 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 951 transitions. [2022-11-18 18:52:08,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-18 18:52:08,720 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 951 transitions. [2022-11-18 18:52:08,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-18 18:52:08,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:52:08,721 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:52:08,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-11-18 18:52:08,721 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:52:08,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:52:08,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1759913001, now seen corresponding path program 1 times [2022-11-18 18:52:08,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:52:08,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100518403] [2022-11-18 18:52:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:52:08,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:52:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:09,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:52:09,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:09,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:52:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:09,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 18:52:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:09,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-18 18:52:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:09,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-18 18:52:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:09,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:52:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:09,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:52:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:09,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-18 18:52:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:09,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:52:09,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100518403] [2022-11-18 18:52:09,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100518403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:52:09,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:52:09,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 18:52:09,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075539678] [2022-11-18 18:52:09,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:52:09,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:52:09,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:52:09,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:52:09,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:52:09,340 INFO L87 Difference]: Start difference. First operand 768 states and 951 transitions. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-18 18:52:13,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:52:14,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:52:14,428 INFO L93 Difference]: Finished difference Result 1196 states and 1501 transitions. [2022-11-18 18:52:14,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 18:52:14,429 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 96 [2022-11-18 18:52:14,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:52:14,433 INFO L225 Difference]: With dead ends: 1196 [2022-11-18 18:52:14,433 INFO L226 Difference]: Without dead ends: 789 [2022-11-18 18:52:14,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2022-11-18 18:52:14,434 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 600 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 217 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 1913 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:52:14,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 1913 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1182 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2022-11-18 18:52:14,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-11-18 18:52:14,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 768. [2022-11-18 18:52:14,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 648 states have (on average 1.2314814814814814) internal successors, (798), 663 states have internal predecessors, (798), 64 states have call successors, (64), 46 states have call predecessors, (64), 55 states have return successors, (85), 63 states have call predecessors, (85), 59 states have call successors, (85) [2022-11-18 18:52:14,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 947 transitions. [2022-11-18 18:52:14,566 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 947 transitions. Word has length 96 [2022-11-18 18:52:14,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:52:14,567 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 947 transitions. [2022-11-18 18:52:14,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-18 18:52:14,567 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 947 transitions. [2022-11-18 18:52:14,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-18 18:52:14,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:52:14,568 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:52:14,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-11-18 18:52:14,568 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:52:14,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:52:14,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1920923923, now seen corresponding path program 1 times [2022-11-18 18:52:14,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:52:14,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42345199] [2022-11-18 18:52:14,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:52:14,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:52:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:14,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:52:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:14,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:52:14,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:15,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 18:52:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:15,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-18 18:52:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:15,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-18 18:52:15,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:15,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:15,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:52:15,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42345199] [2022-11-18 18:52:15,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42345199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:52:15,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:52:15,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-18 18:52:15,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552360124] [2022-11-18 18:52:15,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:52:15,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 18:52:15,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:52:15,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 18:52:15,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:52:15,187 INFO L87 Difference]: Start difference. First operand 768 states and 947 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 7 states have internal predecessors, (76), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-18 18:52:20,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:52:22,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:52:24,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:52:24,132 INFO L93 Difference]: Finished difference Result 789 states and 977 transitions. [2022-11-18 18:52:24,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 18:52:24,133 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 7 states have internal predecessors, (76), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 87 [2022-11-18 18:52:24,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:52:24,134 INFO L225 Difference]: With dead ends: 789 [2022-11-18 18:52:24,134 INFO L226 Difference]: Without dead ends: 710 [2022-11-18 18:52:24,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-11-18 18:52:24,135 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 467 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 2123 mSolverCounterSat, 141 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 1993 SdHoareTripleChecker+Invalid, 2266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 2123 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:52:24,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 1993 Invalid, 2266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 2123 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2022-11-18 18:52:24,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-11-18 18:52:24,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 695. [2022-11-18 18:52:24,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 581 states have (on average 1.2306368330464716) internal successors, (715), 596 states have internal predecessors, (715), 61 states have call successors, (61), 43 states have call predecessors, (61), 52 states have return successors, (82), 60 states have call predecessors, (82), 56 states have call successors, (82) [2022-11-18 18:52:24,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 858 transitions. [2022-11-18 18:52:24,233 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 858 transitions. Word has length 87 [2022-11-18 18:52:24,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:52:24,233 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 858 transitions. [2022-11-18 18:52:24,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 7 states have internal predecessors, (76), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-18 18:52:24,234 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 858 transitions. [2022-11-18 18:52:24,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-18 18:52:24,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:52:24,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:52:24,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-11-18 18:52:24,235 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:52:24,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:52:24,235 INFO L85 PathProgramCache]: Analyzing trace with hash 985884663, now seen corresponding path program 1 times [2022-11-18 18:52:24,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:52:24,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446758902] [2022-11-18 18:52:24,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:52:24,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:52:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:24,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:52:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:24,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:52:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:24,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-18 18:52:24,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:24,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-18 18:52:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:24,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-18 18:52:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:24,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:52:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:24,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:52:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:24,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-18 18:52:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:24,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:52:24,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446758902] [2022-11-18 18:52:24,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446758902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:52:24,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:52:24,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 18:52:24,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956440468] [2022-11-18 18:52:24,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:52:24,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:52:24,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:52:24,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:52:24,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:52:24,839 INFO L87 Difference]: Start difference. First operand 695 states and 858 transitions. Second operand has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-18 18:52:28,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:52:29,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:52:29,326 INFO L93 Difference]: Finished difference Result 1067 states and 1334 transitions. [2022-11-18 18:52:29,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 18:52:29,326 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 92 [2022-11-18 18:52:29,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:52:29,329 INFO L225 Difference]: With dead ends: 1067 [2022-11-18 18:52:29,329 INFO L226 Difference]: Without dead ends: 710 [2022-11-18 18:52:29,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:52:29,330 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 432 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 162 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 1735 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:52:29,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 1735 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 986 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-11-18 18:52:29,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-11-18 18:52:29,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 695. [2022-11-18 18:52:29,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 581 states have (on average 1.2289156626506024) internal successors, (714), 596 states have internal predecessors, (714), 61 states have call successors, (61), 43 states have call predecessors, (61), 52 states have return successors, (82), 60 states have call predecessors, (82), 56 states have call successors, (82) [2022-11-18 18:52:29,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 857 transitions. [2022-11-18 18:52:29,426 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 857 transitions. Word has length 92 [2022-11-18 18:52:29,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:52:29,426 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 857 transitions. [2022-11-18 18:52:29,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-18 18:52:29,426 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 857 transitions. [2022-11-18 18:52:29,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-18 18:52:29,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:52:29,427 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:52:29,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-11-18 18:52:29,428 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:52:29,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:52:29,428 INFO L85 PathProgramCache]: Analyzing trace with hash -751551231, now seen corresponding path program 1 times [2022-11-18 18:52:29,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:52:29,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761353147] [2022-11-18 18:52:29,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:52:29,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:52:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:29,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:52:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:29,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:52:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:29,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 18:52:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:29,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-18 18:52:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:29,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-18 18:52:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:29,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:52:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:29,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:52:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:29,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-18 18:52:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:29,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-11-18 18:52:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:29,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:52:29,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761353147] [2022-11-18 18:52:29,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761353147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:52:29,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:52:29,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-18 18:52:29,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002822335] [2022-11-18 18:52:29,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:52:29,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:52:29,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:52:29,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:52:29,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:52:29,970 INFO L87 Difference]: Start difference. First operand 695 states and 857 transitions. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-18 18:52:33,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:52:35,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:52:36,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:52:36,774 INFO L93 Difference]: Finished difference Result 1045 states and 1301 transitions. [2022-11-18 18:52:36,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 18:52:36,774 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 106 [2022-11-18 18:52:36,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:52:36,777 INFO L225 Difference]: With dead ends: 1045 [2022-11-18 18:52:36,777 INFO L226 Difference]: Without dead ends: 658 [2022-11-18 18:52:36,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2022-11-18 18:52:36,778 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 592 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 153 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:52:36,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 1471 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1050 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2022-11-18 18:52:36,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-11-18 18:52:36,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 638. [2022-11-18 18:52:36,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 538 states have (on average 1.2304832713754648) internal successors, (662), 551 states have internal predecessors, (662), 53 states have call successors, (53), 37 states have call predecessors, (53), 46 states have return successors, (63), 54 states have call predecessors, (63), 49 states have call successors, (63) [2022-11-18 18:52:36,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 778 transitions. [2022-11-18 18:52:36,864 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 778 transitions. Word has length 106 [2022-11-18 18:52:36,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:52:36,864 INFO L495 AbstractCegarLoop]: Abstraction has 638 states and 778 transitions. [2022-11-18 18:52:36,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-18 18:52:36,864 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 778 transitions. [2022-11-18 18:52:36,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-18 18:52:36,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:52:36,865 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:52:36,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-11-18 18:52:36,866 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:52:36,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:52:36,866 INFO L85 PathProgramCache]: Analyzing trace with hash -708697275, now seen corresponding path program 1 times [2022-11-18 18:52:36,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:52:36,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551179357] [2022-11-18 18:52:36,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:52:36,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:52:36,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:37,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:52:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:37,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:52:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:37,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 18:52:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:37,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-18 18:52:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:37,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-18 18:52:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:37,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:52:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:37,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:52:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:37,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-18 18:52:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:37,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-11-18 18:52:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:37,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:37,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:52:37,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551179357] [2022-11-18 18:52:37,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551179357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:52:37,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:52:37,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-18 18:52:37,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99208994] [2022-11-18 18:52:37,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:52:37,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 18:52:37,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:52:37,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 18:52:37,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:52:37,595 INFO L87 Difference]: Start difference. First operand 638 states and 778 transitions. Second operand has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 7 states have internal predecessors, (93), 3 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-18 18:52:41,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:52:42,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:52:42,137 INFO L93 Difference]: Finished difference Result 740 states and 898 transitions. [2022-11-18 18:52:42,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 18:52:42,137 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 7 states have internal predecessors, (93), 3 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 112 [2022-11-18 18:52:42,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:52:42,141 INFO L225 Difference]: With dead ends: 740 [2022-11-18 18:52:42,141 INFO L226 Difference]: Without dead ends: 673 [2022-11-18 18:52:42,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-11-18 18:52:42,142 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 604 mSDsluCounter, 1958 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 201 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 2222 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:52:42,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 2222 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1150 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-11-18 18:52:42,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-11-18 18:52:42,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 644. [2022-11-18 18:52:42,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 543 states have (on average 1.2283609576427257) internal successors, (667), 557 states have internal predecessors, (667), 53 states have call successors, (53), 37 states have call predecessors, (53), 47 states have return successors, (64), 54 states have call predecessors, (64), 49 states have call successors, (64) [2022-11-18 18:52:42,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 784 transitions. [2022-11-18 18:52:42,247 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 784 transitions. Word has length 112 [2022-11-18 18:52:42,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:52:42,247 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 784 transitions. [2022-11-18 18:52:42,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 7 states have internal predecessors, (93), 3 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-18 18:52:42,247 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 784 transitions. [2022-11-18 18:52:42,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-18 18:52:42,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:52:42,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:52:42,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-11-18 18:52:42,249 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:52:42,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:52:42,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1557650297, now seen corresponding path program 1 times [2022-11-18 18:52:42,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:52:42,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298274040] [2022-11-18 18:52:42,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:52:42,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:52:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:42,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:52:42,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:42,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:52:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:42,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 18:52:42,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:42,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-18 18:52:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:42,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-18 18:52:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:42,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:52:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:42,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:52:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:42,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-18 18:52:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:42,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 18:52:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:42,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:42,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:52:42,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298274040] [2022-11-18 18:52:42,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298274040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:52:42,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:52:42,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-18 18:52:42,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060452792] [2022-11-18 18:52:42,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:52:42,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 18:52:42,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:52:42,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 18:52:42,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:52:42,920 INFO L87 Difference]: Start difference. First operand 644 states and 784 transitions. Second operand has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-18 18:52:46,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:52:47,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:52:47,732 INFO L93 Difference]: Finished difference Result 732 states and 885 transitions. [2022-11-18 18:52:47,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 18:52:47,732 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 113 [2022-11-18 18:52:47,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:52:47,734 INFO L225 Difference]: With dead ends: 732 [2022-11-18 18:52:47,734 INFO L226 Difference]: Without dead ends: 665 [2022-11-18 18:52:47,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-11-18 18:52:47,735 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 386 mSDsluCounter, 2056 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 99 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 2320 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:52:47,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 2320 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1278 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2022-11-18 18:52:47,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-11-18 18:52:47,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 567. [2022-11-18 18:52:47,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 477 states have (on average 1.2180293501048218) internal successors, (581), 488 states have internal predecessors, (581), 47 states have call successors, (47), 34 states have call predecessors, (47), 42 states have return successors, (55), 48 states have call predecessors, (55), 43 states have call successors, (55) [2022-11-18 18:52:47,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 683 transitions. [2022-11-18 18:52:47,814 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 683 transitions. Word has length 113 [2022-11-18 18:52:47,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:52:47,814 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 683 transitions. [2022-11-18 18:52:47,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-18 18:52:47,815 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 683 transitions. [2022-11-18 18:52:47,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-18 18:52:47,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:52:47,816 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:52:47,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-11-18 18:52:47,817 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:52:47,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:52:47,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1717048505, now seen corresponding path program 1 times [2022-11-18 18:52:47,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:52:47,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641557735] [2022-11-18 18:52:47,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:52:47,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:52:47,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:48,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:52:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:48,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:52:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:48,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-18 18:52:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:48,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-18 18:52:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:48,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-18 18:52:48,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:48,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:52:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:48,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:52:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:48,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 18:52:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:48,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-18 18:52:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:48,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:52:48,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641557735] [2022-11-18 18:52:48,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641557735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:52:48,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:52:48,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-18 18:52:48,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671550337] [2022-11-18 18:52:48,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:52:48,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 18:52:48,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:52:48,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 18:52:48,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:52:48,515 INFO L87 Difference]: Start difference. First operand 567 states and 683 transitions. Second operand has 13 states, 13 states have (on average 7.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (10), 8 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-18 18:52:52,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:52:53,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:52:53,040 INFO L93 Difference]: Finished difference Result 744 states and 899 transitions. [2022-11-18 18:52:53,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 18:52:53,041 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (10), 8 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 110 [2022-11-18 18:52:53,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:52:53,044 INFO L225 Difference]: With dead ends: 744 [2022-11-18 18:52:53,044 INFO L226 Difference]: Without dead ends: 610 [2022-11-18 18:52:53,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-11-18 18:52:53,045 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 431 mSDsluCounter, 1707 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 101 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 1951 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:52:53,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 1951 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1161 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-11-18 18:52:53,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-11-18 18:52:53,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 576. [2022-11-18 18:52:53,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 485 states have (on average 1.2082474226804123) internal successors, (586), 494 states have internal predecessors, (586), 48 states have call successors, (48), 34 states have call predecessors, (48), 42 states have return successors, (55), 48 states have call predecessors, (55), 43 states have call successors, (55) [2022-11-18 18:52:53,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 689 transitions. [2022-11-18 18:52:53,149 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 689 transitions. Word has length 110 [2022-11-18 18:52:53,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:52:53,149 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 689 transitions. [2022-11-18 18:52:53,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (10), 8 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-18 18:52:53,150 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 689 transitions. [2022-11-18 18:52:53,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-18 18:52:53,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:52:53,151 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:52:53,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-11-18 18:52:53,151 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:52:53,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:52:53,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1277151609, now seen corresponding path program 1 times [2022-11-18 18:52:53,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:52:53,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605333484] [2022-11-18 18:52:53,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:52:53,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:52:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:53,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:52:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:53,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:52:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:53,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-18 18:52:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:53,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-18 18:52:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:53,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-18 18:52:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:53,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:52:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:53,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:52:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:53,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 18:52:53,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:53,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 18:52:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:53,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:52:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:53,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:52:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 18:52:53,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:52:53,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605333484] [2022-11-18 18:52:53,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605333484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:52:53,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:52:53,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 18:52:53,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398710817] [2022-11-18 18:52:53,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:52:53,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:52:53,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:52:53,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:52:53,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:52:53,785 INFO L87 Difference]: Start difference. First operand 576 states and 689 transitions. Second operand has 12 states, 12 states have (on average 7.0) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (11), 8 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-18 18:52:57,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:52:59,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:53:00,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:00,651 INFO L93 Difference]: Finished difference Result 618 states and 741 transitions. [2022-11-18 18:53:00,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 18:53:00,652 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.0) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (11), 8 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) Word has length 117 [2022-11-18 18:53:00,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:00,654 INFO L225 Difference]: With dead ends: 618 [2022-11-18 18:53:00,654 INFO L226 Difference]: Without dead ends: 524 [2022-11-18 18:53:00,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:53:00,654 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 316 mSDsluCounter, 1563 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 64 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:00,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1806 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1121 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2022-11-18 18:53:00,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-11-18 18:53:00,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 379. [2022-11-18 18:53:00,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 316 states have (on average 1.1740506329113924) internal successors, (371), 321 states have internal predecessors, (371), 35 states have call successors, (35), 25 states have call predecessors, (35), 27 states have return successors, (35), 33 states have call predecessors, (35), 32 states have call successors, (35) [2022-11-18 18:53:00,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 441 transitions. [2022-11-18 18:53:00,751 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 441 transitions. Word has length 117 [2022-11-18 18:53:00,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:00,752 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 441 transitions. [2022-11-18 18:53:00,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.0) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (11), 8 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-18 18:53:00,752 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 441 transitions. [2022-11-18 18:53:00,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-18 18:53:00,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:00,753 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-18 18:53:00,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-11-18 18:53:00,754 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:53:00,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:00,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1546029661, now seen corresponding path program 1 times [2022-11-18 18:53:00,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:53:00,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600198318] [2022-11-18 18:53:00,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:53:00,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:53:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:01,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:53:01,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:01,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:53:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:01,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 18:53:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:01,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-18 18:53:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:01,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 18:53:01,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:01,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-18 18:53:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:01,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-18 18:53:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:01,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 18:53:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:01,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 18:53:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:01,241 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 18:53:01,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:53:01,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600198318] [2022-11-18 18:53:01,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600198318] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:53:01,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:53:01,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:53:01,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805353957] [2022-11-18 18:53:01,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:53:01,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:53:01,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:53:01,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:53:01,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:53:01,243 INFO L87 Difference]: Start difference. First operand 379 states and 441 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-18 18:53:04,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:53:05,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:05,103 INFO L93 Difference]: Finished difference Result 449 states and 532 transitions. [2022-11-18 18:53:05,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:53:05,104 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 116 [2022-11-18 18:53:05,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:05,105 INFO L225 Difference]: With dead ends: 449 [2022-11-18 18:53:05,105 INFO L226 Difference]: Without dead ends: 423 [2022-11-18 18:53:05,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:53:05,106 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 171 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:05,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 1092 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 684 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2022-11-18 18:53:05,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-11-18 18:53:05,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 396. [2022-11-18 18:53:05,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 332 states have (on average 1.1746987951807228) internal successors, (390), 337 states have internal predecessors, (390), 36 states have call successors, (36), 25 states have call predecessors, (36), 27 states have return successors, (36), 34 states have call predecessors, (36), 33 states have call successors, (36) [2022-11-18 18:53:05,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 462 transitions. [2022-11-18 18:53:05,162 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 462 transitions. Word has length 116 [2022-11-18 18:53:05,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:05,162 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 462 transitions. [2022-11-18 18:53:05,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-18 18:53:05,163 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 462 transitions. [2022-11-18 18:53:05,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-18 18:53:05,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:05,164 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-18 18:53:05,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-11-18 18:53:05,164 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:53:05,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:05,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1510565347, now seen corresponding path program 1 times [2022-11-18 18:53:05,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:53:05,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620922801] [2022-11-18 18:53:05,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:53:05,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:53:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:05,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:53:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:05,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:53:05,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:05,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 18:53:05,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:05,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-18 18:53:05,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:05,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 18:53:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:05,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-18 18:53:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:05,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-18 18:53:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:05,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 18:53:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:05,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 18:53:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 18:53:05,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:53:05,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620922801] [2022-11-18 18:53:05,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620922801] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:53:05,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:53:05,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:53:05,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336720188] [2022-11-18 18:53:05,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:53:05,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:53:05,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:53:05,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:53:05,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:53:05,647 INFO L87 Difference]: Start difference. First operand 396 states and 462 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-18 18:53:08,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:53:09,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:09,212 INFO L93 Difference]: Finished difference Result 447 states and 523 transitions. [2022-11-18 18:53:09,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:53:09,213 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 116 [2022-11-18 18:53:09,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:09,214 INFO L225 Difference]: With dead ends: 447 [2022-11-18 18:53:09,215 INFO L226 Difference]: Without dead ends: 380 [2022-11-18 18:53:09,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:53:09,216 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 214 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 91 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:09,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 966 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 511 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2022-11-18 18:53:09,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-11-18 18:53:09,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 358. [2022-11-18 18:53:09,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 298 states have (on average 1.1610738255033557) internal successors, (346), 301 states have internal predecessors, (346), 33 states have call successors, (33), 25 states have call predecessors, (33), 26 states have return successors, (34), 32 states have call predecessors, (34), 32 states have call successors, (34) [2022-11-18 18:53:09,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 413 transitions. [2022-11-18 18:53:09,299 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 413 transitions. Word has length 116 [2022-11-18 18:53:09,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:09,300 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 413 transitions. [2022-11-18 18:53:09,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-18 18:53:09,300 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 413 transitions. [2022-11-18 18:53:09,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-18 18:53:09,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:09,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:09,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-11-18 18:53:09,302 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:53:09,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:09,302 INFO L85 PathProgramCache]: Analyzing trace with hash 2088850613, now seen corresponding path program 1 times [2022-11-18 18:53:09,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:53:09,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795042076] [2022-11-18 18:53:09,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:53:09,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:53:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:09,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:53:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:09,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:53:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:09,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 18:53:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:09,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-18 18:53:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:09,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-18 18:53:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:09,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:53:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:09,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:53:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:09,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-18 18:53:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:09,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 18:53:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:09,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-18 18:53:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:09,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:53:09,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795042076] [2022-11-18 18:53:09,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795042076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:53:09,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:53:09,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-18 18:53:09,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492871703] [2022-11-18 18:53:09,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:53:09,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 18:53:09,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:53:09,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 18:53:09,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:53:09,932 INFO L87 Difference]: Start difference. First operand 358 states and 413 transitions. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 6 states have internal predecessors, (101), 4 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-18 18:53:15,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:53:17,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:53:18,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:18,648 INFO L93 Difference]: Finished difference Result 692 states and 815 transitions. [2022-11-18 18:53:18,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 18:53:18,649 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 6 states have internal predecessors, (101), 4 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 122 [2022-11-18 18:53:18,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:18,651 INFO L225 Difference]: With dead ends: 692 [2022-11-18 18:53:18,651 INFO L226 Difference]: Without dead ends: 631 [2022-11-18 18:53:18,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:53:18,652 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 880 mSDsluCounter, 2205 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 270 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 2517 SdHoareTripleChecker+Invalid, 2352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:18,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 2517 Invalid, 2352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 2080 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2022-11-18 18:53:18,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-11-18 18:53:18,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 324. [2022-11-18 18:53:18,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 272 states have (on average 1.1654411764705883) internal successors, (317), 274 states have internal predecessors, (317), 27 states have call successors, (27), 23 states have call predecessors, (27), 24 states have return successors, (28), 26 states have call predecessors, (28), 26 states have call successors, (28) [2022-11-18 18:53:18,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 372 transitions. [2022-11-18 18:53:18,710 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 372 transitions. Word has length 122 [2022-11-18 18:53:18,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:18,710 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 372 transitions. [2022-11-18 18:53:18,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 6 states have internal predecessors, (101), 4 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-18 18:53:18,710 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 372 transitions. [2022-11-18 18:53:18,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-18 18:53:18,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:18,711 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-18 18:53:18,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-11-18 18:53:18,712 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:53:18,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:18,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1025503595, now seen corresponding path program 1 times [2022-11-18 18:53:18,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:53:18,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524449844] [2022-11-18 18:53:18,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:53:18,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:53:18,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:19,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:53:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:19,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:53:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:19,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 18:53:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:19,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-18 18:53:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:19,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 18:53:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:19,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-18 18:53:19,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:19,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-18 18:53:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:19,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 18:53:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:19,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 18:53:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:19,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-11-18 18:53:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 18:53:19,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:53:19,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524449844] [2022-11-18 18:53:19,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524449844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:53:19,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:53:19,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-18 18:53:19,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122100764] [2022-11-18 18:53:19,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:53:19,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:53:19,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:53:19,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:53:19,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:53:19,649 INFO L87 Difference]: Start difference. First operand 324 states and 372 transitions. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-18 18:53:23,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:53:23,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:23,629 INFO L93 Difference]: Finished difference Result 361 states and 419 transitions. [2022-11-18 18:53:23,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 18:53:23,629 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 125 [2022-11-18 18:53:23,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:23,630 INFO L225 Difference]: With dead ends: 361 [2022-11-18 18:53:23,630 INFO L226 Difference]: Without dead ends: 269 [2022-11-18 18:53:23,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:53:23,631 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 368 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 110 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:23,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 1511 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 865 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2022-11-18 18:53:23,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-11-18 18:53:23,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 255. [2022-11-18 18:53:23,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 215 states have (on average 1.1813953488372093) internal successors, (254), 217 states have internal predecessors, (254), 19 states have call successors, (19), 19 states have call predecessors, (19), 20 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-11-18 18:53:23,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 293 transitions. [2022-11-18 18:53:23,673 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 293 transitions. Word has length 125 [2022-11-18 18:53:23,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:23,673 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 293 transitions. [2022-11-18 18:53:23,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-18 18:53:23,673 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 293 transitions. [2022-11-18 18:53:23,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-18 18:53:23,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:23,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:23,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-11-18 18:53:23,675 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:53:23,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:23,675 INFO L85 PathProgramCache]: Analyzing trace with hash 226053049, now seen corresponding path program 1 times [2022-11-18 18:53:23,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:53:23,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305225343] [2022-11-18 18:53:23,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:53:23,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:53:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:23,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:53:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:23,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:53:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:23,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-18 18:53:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:23,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-18 18:53:23,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:23,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-18 18:53:23,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:24,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:53:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:24,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:53:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:24,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 18:53:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:24,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 18:53:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:24,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-18 18:53:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:24,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:53:24,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305225343] [2022-11-18 18:53:24,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305225343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:53:24,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:53:24,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-18 18:53:24,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348429192] [2022-11-18 18:53:24,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:53:24,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:53:24,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:53:24,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:53:24,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:53:24,159 INFO L87 Difference]: Start difference. First operand 255 states and 293 transitions. Second operand has 11 states, 11 states have (on average 10.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-18 18:53:27,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:53:29,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:53:31,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:53:33,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:53:34,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:34,309 INFO L93 Difference]: Finished difference Result 323 states and 371 transitions. [2022-11-18 18:53:34,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 18:53:34,310 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 131 [2022-11-18 18:53:34,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:34,311 INFO L225 Difference]: With dead ends: 323 [2022-11-18 18:53:34,311 INFO L226 Difference]: Without dead ends: 269 [2022-11-18 18:53:34,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:53:34,312 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 214 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 34 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:34,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 995 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 674 Invalid, 4 Unknown, 0 Unchecked, 9.9s Time] [2022-11-18 18:53:34,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-11-18 18:53:34,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 255. [2022-11-18 18:53:34,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 215 states have (on average 1.1767441860465115) internal successors, (253), 217 states have internal predecessors, (253), 19 states have call successors, (19), 19 states have call predecessors, (19), 20 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-11-18 18:53:34,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 292 transitions. [2022-11-18 18:53:34,353 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 292 transitions. Word has length 131 [2022-11-18 18:53:34,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:34,353 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 292 transitions. [2022-11-18 18:53:34,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-18 18:53:34,354 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 292 transitions. [2022-11-18 18:53:34,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-18 18:53:34,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:34,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:34,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-11-18 18:53:34,355 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:53:34,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:34,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1225615896, now seen corresponding path program 1 times [2022-11-18 18:53:34,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:53:34,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222625537] [2022-11-18 18:53:34,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:53:34,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:53:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:34,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:53:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:34,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:53:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:34,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-18 18:53:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:34,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-18 18:53:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:34,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-18 18:53:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:34,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:53:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:34,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 18:53:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:34,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 18:53:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:34,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 18:53:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:34,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-11-18 18:53:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:34,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:53:34,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222625537] [2022-11-18 18:53:34,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222625537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:53:34,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:53:34,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 18:53:34,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538414362] [2022-11-18 18:53:34,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:53:34,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:53:34,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:53:34,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:53:34,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:53:34,811 INFO L87 Difference]: Start difference. First operand 255 states and 292 transitions. Second operand has 10 states, 10 states have (on average 11.1) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-18 18:53:37,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 18:53:38,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:38,214 INFO L93 Difference]: Finished difference Result 360 states and 416 transitions. [2022-11-18 18:53:38,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:53:38,214 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 132 [2022-11-18 18:53:38,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:38,217 INFO L225 Difference]: With dead ends: 360 [2022-11-18 18:53:38,217 INFO L226 Difference]: Without dead ends: 308 [2022-11-18 18:53:38,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:53:38,218 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 396 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 90 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:38,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 869 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 385 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-11-18 18:53:38,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-18 18:53:38,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 253. [2022-11-18 18:53:38,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 213 states have (on average 1.1737089201877935) internal successors, (250), 215 states have internal predecessors, (250), 19 states have call successors, (19), 19 states have call predecessors, (19), 20 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-11-18 18:53:38,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 289 transitions. [2022-11-18 18:53:38,261 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 289 transitions. Word has length 132 [2022-11-18 18:53:38,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:38,261 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 289 transitions. [2022-11-18 18:53:38,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-18 18:53:38,262 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 289 transitions. [2022-11-18 18:53:38,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-18 18:53:38,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:38,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:38,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-11-18 18:53:38,263 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:53:38,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:38,263 INFO L85 PathProgramCache]: Analyzing trace with hash -271290531, now seen corresponding path program 1 times [2022-11-18 18:53:38,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:53:38,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923037097] [2022-11-18 18:53:38,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:53:38,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms